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Gene Information

Gene symbol: SRC

Gene name: v-src sarcoma (Schmidt-Ruppin A-2) viral oncogene homolog (avian)

HGNC ID: 11283

Synonyms: ASV, c-src

Related Genes

# Gene Symbol Number of hits
1 ADAM17 1 hits
2 ADRB2 1 hits
3 ADRBK1 1 hits
4 AGT 1 hits
5 AGTR1 1 hits
6 AKT1 1 hits
7 AR 1 hits
8 BAX 1 hits
9 BCAR1 1 hits
10 BCL2 1 hits
11 BTC 1 hits
12 BTK 1 hits
13 CAV1 1 hits
14 CCDC91 1 hits
15 CCK 1 hits
16 CCND1 1 hits
17 CD47 1 hits
18 COL1A1 1 hits
19 COL20A1 1 hits
20 COL4A4 1 hits
21 CREBBP 1 hits
22 CRK 1 hits
23 CRP 1 hits
24 CSK 1 hits
25 CYSLTR2 1 hits
26 DOK4 1 hits
27 EDN1 1 hits
28 EGF 1 hits
29 EGFR 1 hits
30 EP300 1 hits
31 ESR1 1 hits
32 F2 1 hits
33 FGR 1 hits
34 FOS 1 hits
35 FOXO1 1 hits
36 G6PD 1 hits
37 GCG 1 hits
38 GLP1R 1 hits
39 GORASP2 1 hits
40 GRB2 1 hits
41 HCK 1 hits
42 HIF1A 1 hits
43 HMOX1 1 hits
44 HPN 1 hits
45 IGF1 1 hits
46 IGF1R 1 hits
47 IGFBP1 1 hits
48 IKBKB 1 hits
49 INPP5D 1 hits
50 INPP5E 1 hits
51 INPPL1 1 hits
52 INS 1 hits
53 INSR 1 hits
54 IPPK 1 hits
55 IRS1 1 hits
56 IRS2 1 hits
57 JAK2 1 hits
58 JUN 1 hits
59 KCNJ4 1 hits
60 KDR 1 hits
61 LCK 1 hits
62 MAPK1 1 hits
63 MAPK14 1 hits
64 MAPK3 1 hits
65 MAPK6 1 hits
66 MAPK7 1 hits
67 MAPK8 1 hits
68 MMP14 1 hits
69 MMP9 1 hits
70 MYC 1 hits
71 MYLK3 1 hits
72 NALCN 1 hits
73 NCK1 1 hits
74 NCOA1 1 hits
75 NCOA3 1 hits
76 NFKB1 1 hits
77 NMT1 1 hits
78 NOS2A 1 hits
79 NOS3 1 hits
80 NOX1 1 hits
81 NOX4 1 hits
82 NOX5 1 hits
83 NTRK3 1 hits
84 PDGFA 1 hits
85 PDGFRB 1 hits
86 PDK1 1 hits
87 PI3 1 hits
88 PIB5PA 1 hits
89 PIK3CA 1 hits
90 PIK3CG 1 hits
91 PIK3R1 1 hits
92 PLAT 1 hits
93 PLCG1 1 hits
94 PPARG 1 hits
95 PPP1R13B 1 hits
96 PPP1R3C 1 hits
97 PPYR1 1 hits
98 PRKAA1 1 hits
99 PRKAA2 1 hits
100 PRKCA 1 hits
101 PRKD1 1 hits
102 PTEN 1 hits
103 PTK2 1 hits
104 PTK2B 1 hits
105 PTPN1 1 hits
106 PTPN11 1 hits
107 PTPN13 1 hits
108 PTPN2 1 hits
109 PTPN22 1 hits
110 PTPN6 1 hits
111 PTPRA 1 hits
112 PTPRF 1 hits
113 PTPRU 1 hits
114 PXN 1 hits
115 RAB3GAP1 1 hits
116 RASA1 1 hits
117 SAG 1 hits
118 SEC23IP 1 hits
119 SERPINE1 1 hits
120 SH2B1 1 hits
121 SHC1 1 hits
122 SIRPA 1 hits
123 SMAD1 1 hits
124 SMAD2 1 hits
125 SNW1 1 hits
126 SRA1 1 hits
127 SRPR 1 hits
128 STK11 1 hits
129 SYK 1 hits
130 SYNJ1 1 hits
131 TNF 1 hits
132 TP53 1 hits
133 TRA 1 hits
134 TYK2 1 hits
135 VCL 1 hits
136 VEGFA 1 hits
137 YES1 1 hits

Related Sentences

# PMID Sentence
1 1372896 RNAs corresponding to known insulin-responsive genes such as c-fos, c-myc, c-Ha-ras, and c-src displayed rapid and transient 2-4-fold increases between 30 and 60 min as detected by either Northern analysis or the multiple S1 nuclease protection assay.
2 1372896 In addition, RNA levels for the insulin receptor, Glut-4, Glut-3, and c-jun were apparently unaffected by exposure of the cells to insulin.
3 7504175 Pleiotropic insulin signals are engaged by multisite phosphorylation of IRS-1.
4 7504175 Tyrosine-phosphorylated IRS-1 binds specifically to various cellular proteins containing Src homology 2 (SH2) domains (SH2 proteins).
5 7504175 We identified some of the tyrosine residues of IRS-1 that undergo insulin-stimulated phosphorylation by the purified insulin receptor and in intact cells during insulin stimulation.
6 7504175 These results extend the notion that IRS-1 is a multisite docking protein that engages various downstream regulatory elements during insulin signal transmission.
7 7520528 Second, we demonstrate a direct binding between purified SH2 and SH3 domains of Fyn and Lck Src family kinases.
8 7520528 Heterologous binding between SH2 and SH3 domains of closely related members of the Src family, namely, Fyn, Lck, and Src, was also observed.
9 7520528 In contrast, Grb2, Crk, Abl, p85 phosphatidylinositol 3-kinase, and GTPase-activating protein SH2 domains showed lower or no binding to Fyn or Lck SH3 domains.
10 7520528 SH3-SH2 binding was observed in the presence of proline-rich peptides or when a point mutation (W119K) was introduced in the putative ligand-binding pouch of the Fyn SH3 domain, although these treatments completely abolished the binding to p85 phosphatidylinositol 3-kinase and other SH3-specific polypeptides.
11 7520528 Second, we demonstrate a direct binding between purified SH2 and SH3 domains of Fyn and Lck Src family kinases.
12 7520528 Heterologous binding between SH2 and SH3 domains of closely related members of the Src family, namely, Fyn, Lck, and Src, was also observed.
13 7520528 In contrast, Grb2, Crk, Abl, p85 phosphatidylinositol 3-kinase, and GTPase-activating protein SH2 domains showed lower or no binding to Fyn or Lck SH3 domains.
14 7520528 SH3-SH2 binding was observed in the presence of proline-rich peptides or when a point mutation (W119K) was introduced in the putative ligand-binding pouch of the Fyn SH3 domain, although these treatments completely abolished the binding to p85 phosphatidylinositol 3-kinase and other SH3-specific polypeptides.
15 7961682 Interactive roles of Ras, insulin receptor substrate-1, and proteins with Src homology-2 domains in insulin signaling in Xenopus oocytes.
16 7961682 Insulin receptor substrate-1 (IRS-1) serves as the major immediate substrate of insulin/insulin-like growth factor (IGF)-1 receptors and following tyrosine phosphorylation binds to specific Src homology-2 (SH2) domain-containing proteins including the p85 subunit of phosphatidylinositol (PI) 3-kinase and GRB2, a molecule believed to link IRS-1 to the Ras pathway.
17 7961682 To investigate how these SH2-containing signaling molecules interact to regulate insulin/IGF-1 action, IRS-1, glutathione S-transferase (GST)-SH2 domain fusion proteins and Ras proteins were microinjected into Xenopus oocytes.
18 7961682 We found that pleiotropic insulin actions are mediated by IRS-1 through two independent, but convergent, pathways involving PI 3-kinase and GRB2.
19 7961682 Thus, microinjection of GST-fusion proteins of either p85 or GRB2 inhibited IRS-1-dependent activation of mitogen-activated protein (MAP) and S6 kinases and oocyte maturation, although only the GST-SH2 of p85 reduced insulin-stimulated PI 3-kinase activation.
20 7961682 Co-injection of a dominant negative Ras (S17N) with IRS-1 inhibited insulin-stimulated MAP and S6 kinase activation.
21 7961682 Micro-injection of activated [Arg12,Thr59]Ras increased basal MAP and S6 kinase activities and sensitized the oocytes to insulin-stimulated maturation without altering insulin-stimulated PI 3-kinase.
22 7961682 These data strongly suggest that IRS-1 can mediate many of insulin's actions on cellular enzyme activation and cell cycle progression requires binding and activation of multiple different SH2-domain proteins.
23 7961682 Interactive roles of Ras, insulin receptor substrate-1, and proteins with Src homology-2 domains in insulin signaling in Xenopus oocytes.
24 7961682 Insulin receptor substrate-1 (IRS-1) serves as the major immediate substrate of insulin/insulin-like growth factor (IGF)-1 receptors and following tyrosine phosphorylation binds to specific Src homology-2 (SH2) domain-containing proteins including the p85 subunit of phosphatidylinositol (PI) 3-kinase and GRB2, a molecule believed to link IRS-1 to the Ras pathway.
25 7961682 To investigate how these SH2-containing signaling molecules interact to regulate insulin/IGF-1 action, IRS-1, glutathione S-transferase (GST)-SH2 domain fusion proteins and Ras proteins were microinjected into Xenopus oocytes.
26 7961682 We found that pleiotropic insulin actions are mediated by IRS-1 through two independent, but convergent, pathways involving PI 3-kinase and GRB2.
27 7961682 Thus, microinjection of GST-fusion proteins of either p85 or GRB2 inhibited IRS-1-dependent activation of mitogen-activated protein (MAP) and S6 kinases and oocyte maturation, although only the GST-SH2 of p85 reduced insulin-stimulated PI 3-kinase activation.
28 7961682 Co-injection of a dominant negative Ras (S17N) with IRS-1 inhibited insulin-stimulated MAP and S6 kinase activation.
29 7961682 Micro-injection of activated [Arg12,Thr59]Ras increased basal MAP and S6 kinase activities and sensitized the oocytes to insulin-stimulated maturation without altering insulin-stimulated PI 3-kinase.
30 7961682 These data strongly suggest that IRS-1 can mediate many of insulin's actions on cellular enzyme activation and cell cycle progression requires binding and activation of multiple different SH2-domain proteins.
31 8048169 Insulin-receptor substrate 1 (IRS-1) is a principal substrate of the receptor tyrosine kinase for insulin and insulin-like growth factor 1, and a substrate for a tyrosine kinase activated by interleukin 4.
32 8048169 IRS-1 undergoes multisite tyrosine phosphorylation and mediates downstream signals by 'docking' various proteins that contain Src homology 2 domains.
33 8382612 An example of such phosphoprotein-effector coupling is provided by the association of phosphatidylinositol 3-kinase (PI 3-kinase) with specific phosphorylation sites within the PDGF receptor, the c-Src/polyoma virus middle T antigen complex and the insulin receptor substrate IRS-1.
34 8382612 To investigate how phosphoprotein binding to the p85 SH2 domain stimulates p110 catalytic activation, we have examined the differential effects of phosphotyrosine and PDGF receptor-, IRS-1- and c-Src-derived phosphopeptides on the conformation of an isolated SH2 domain of PI 3-kinase.
35 8382612 An example of such phosphoprotein-effector coupling is provided by the association of phosphatidylinositol 3-kinase (PI 3-kinase) with specific phosphorylation sites within the PDGF receptor, the c-Src/polyoma virus middle T antigen complex and the insulin receptor substrate IRS-1.
36 8382612 To investigate how phosphoprotein binding to the p85 SH2 domain stimulates p110 catalytic activation, we have examined the differential effects of phosphotyrosine and PDGF receptor-, IRS-1- and c-Src-derived phosphopeptides on the conformation of an isolated SH2 domain of PI 3-kinase.
37 8631859 The Fyn tyrosine kinase binds Irs-1 and forms a distinct signaling complex during insulin stimulation.
38 8631859 Irs-proteins link the receptors for insulin/IGF-1, growth hormones, and several interleukins and interferons to signaling proteins that contain Src homology-2 (SH2).
39 8631859 Mutation of p59fyn at the COOH-terminal tyrosine phosphorylation site (Tyr531) enhanced its binding to Irs-1 during insulin stimulation.
40 8631859 Binding experiments with various SH2 protein revealed that Grb-2 was largely excluded from Irs-1 complexes containing p59fyn, whereas Grb-2 and p85 occurred in the same Irs-1 complex.
41 8631859 By comparison with the insulin receptor, p59fyn kinase phosphorylated a unique cohort of tyrosine residues in Irs-1.
42 8636261 RNA from the proto-oncogenes c-Ha-ras, c-myc, and c-src transiently increased 2- to 4-fold within 30 min of insulin infusion.
43 8636261 In addition, the RNA abundance of myf-5, a muscle specific differentiation factor, increased 3-fold with a time course similar to that of c-Ha-ras, c-myc, and c-src.
44 8636261 In insulin-resistant individuals, the RNA levels of c-Ha-ras and myf-5 did not increase, whereas c-src RNA did increase within 30 min of insulin infusion.
45 8636261 RNA encoding c-myc transiently increased in both groups; however, this response was lower in insulin-resistant individuals than in insulin-sensitive individuals in a pattern similar to c-Ha-ras and myf-5.
46 8636261 PPP1A RNA levels slightly increased in insulin-resistant individuals.
47 8636261 In both insulin-sensitive and insulin-resistant persons, RNA quantities of GLUT4, c-jun, c-fos, and the insulin receptor did not change over the period of insulin infusion.
48 8636261 However, overall RNA levels of the insulin receptor and c-jun were lower in insulin-resistant individuals.
49 8636261 RNA from the proto-oncogenes c-Ha-ras, c-myc, and c-src transiently increased 2- to 4-fold within 30 min of insulin infusion.
50 8636261 In addition, the RNA abundance of myf-5, a muscle specific differentiation factor, increased 3-fold with a time course similar to that of c-Ha-ras, c-myc, and c-src.
51 8636261 In insulin-resistant individuals, the RNA levels of c-Ha-ras and myf-5 did not increase, whereas c-src RNA did increase within 30 min of insulin infusion.
52 8636261 RNA encoding c-myc transiently increased in both groups; however, this response was lower in insulin-resistant individuals than in insulin-sensitive individuals in a pattern similar to c-Ha-ras and myf-5.
53 8636261 PPP1A RNA levels slightly increased in insulin-resistant individuals.
54 8636261 In both insulin-sensitive and insulin-resistant persons, RNA quantities of GLUT4, c-jun, c-fos, and the insulin receptor did not change over the period of insulin infusion.
55 8636261 However, overall RNA levels of the insulin receptor and c-jun were lower in insulin-resistant individuals.
56 8636261 RNA from the proto-oncogenes c-Ha-ras, c-myc, and c-src transiently increased 2- to 4-fold within 30 min of insulin infusion.
57 8636261 In addition, the RNA abundance of myf-5, a muscle specific differentiation factor, increased 3-fold with a time course similar to that of c-Ha-ras, c-myc, and c-src.
58 8636261 In insulin-resistant individuals, the RNA levels of c-Ha-ras and myf-5 did not increase, whereas c-src RNA did increase within 30 min of insulin infusion.
59 8636261 RNA encoding c-myc transiently increased in both groups; however, this response was lower in insulin-resistant individuals than in insulin-sensitive individuals in a pattern similar to c-Ha-ras and myf-5.
60 8636261 PPP1A RNA levels slightly increased in insulin-resistant individuals.
61 8636261 In both insulin-sensitive and insulin-resistant persons, RNA quantities of GLUT4, c-jun, c-fos, and the insulin receptor did not change over the period of insulin infusion.
62 8636261 However, overall RNA levels of the insulin receptor and c-jun were lower in insulin-resistant individuals.
63 8754813 Tyrosine phosphorylation of insulin receptor substrate 1 (IRS-1) by the activated receptors for insulin, IGF-1, and various cytokines creates binding sites for signaling proteins with Src homology 2 domains (SH2 proteins).
64 8754813 Determining the role of specific SH2 proteins during insulin signaling has been difficult because IRS-1 possesses as many as 18 potential tyrosine phosphorylation sites, several of which contain redundant motifs.
65 8754813 Using 32D cells, which contain no endogenous IRS proteins, we compared the signaling ability of an IRS-1 molecule in which 18 potential tyrosine phosphorylation sites were replaced by phenylalanine (IRS-1(F18)) with two derivative molecules which retained three YMXM motifs (IRS-1(3YMXM)) or the two COOH-terminal SHP2-Fyn binding sites (IRS-1(YCT)).
66 8754813 During insulin stimulation, IRS-1(F18) failed to undergo tyrosine phosphorylation or mediate activation of the phosphotidylinositol (PI) 3'-kinase or p70(s6k); IRS-1(YCT) was tyrosine phosphorylated but also failed to mediate these signaling events.
67 8754813 IRS-1(F18) and IRS-1(YCT) partially mediated similar levels of insulin-stimulated mitogenesis at high insulin concentrations, however, suggesting that IRS-1 contains phosphotyrosine-independent elements which effect mitogenic signals, and that the sites in IRS-l(YCT) do not augment this signal.
68 8754813 IRS-1(3YMXM) mediated the maximal mitogenic response to insulin, although the response to insulin was more sensitive with wild-type IRS-1.
69 8754813 By contrast, the association of IRS-1(3YMXM) with PI 3'-kinase was more sensitive to insulin than the association with IRS-1.
70 9598824 We also propose a model of signal transduction for the endothelial cell response to shear stress including possible mechanotransducers (integrins, caveolae, ion channels, and G proteins), intermediate signaling molecules (c-Src, ras, Raf, protein kinase C) and the mitogen activated protein kinases (ERK1/2, JNK, p38, BMK-1), and effector molecules (nitric oxide).
71 10660596 Tyrosine dephosphorylation and deactivation of insulin receptor substrate-1 by protein-tyrosine phosphatase 1B.
72 10660596 The specific activity of four candidate protein-tyrosine phosphatases (protein-tyrosine phosphatase 1B (PTP1B), SH2 domain-containing PTPase-2 (SHP-2), leukocyte common antigen-related (LAR), and leukocyte antigen-related phosphatase) (LRP) toward IRS-1 dephosphorylation was studied using recombinant proteins in vitro.
73 10660596 When evaluated as a ratio of activity versus IRS-1 to that versus p-nitrophenyl phosphate, PTP1B remained significantly more active by 3.1-293-fold, respectively.
74 10660596 Overlay blots with recombinant Src homology 2 domains of IRS-1 adaptor proteins showed that the loss of IRS-1 binding of Crk, GRB2, SHP-2, and the p85 subunit of phosphatidylinositol 3'-kinase paralleled the rate of overall IRS-1 dephosphorylation.
75 10660596 Further studies revealed that the adaptor protein GRB2 strongly promoted the formation of a stable protein complex between tyrosine-phosphorylated IRS-1 and catalytically inactive PTP1B, increasing their co-immunoprecipitation from an equimolar solution by 13.5 +/- 3.3-fold (n = 7; p < 0.01).
76 10660596 Inclusion of GRB2 in a reaction mixture of IRS-1 and active PTP1B also increased the overall rate of IRS-1 tyrosine dephosphorylation by 2.7-3.9-fold (p < 0.01).
77 10660596 These results provide new insight into novel molecular interactions involving PTP1B and GRB2 that may influence the steady-state capacity of IRS-1 to function as a phosphotyrosine scaffold and possibly affect the balance of postreceptor insulin signaling.
78 10866039 We studied the impact of 16 serine residues in HIR by mutation to alanine and co-overexpression in human embryonic kidney (HEK) 293 cells together with the docking proteins insulin receptor substrate (IRS)-1, IRS-2, or (SHC) Src homologous and collagen-like.
79 10866039 Coexpression of HIR with IRS-1, IRS-2, and SHC strongly enhanced tyrosine phosphorylation of these proteins.
80 10866039 A similar increase in tyrosine phosphorylation was observed in cells overexpressing IRS-1, IRS-2, or SHC together with all HIR mutants except HIR delta JM and a mutant carrying exchanges of serines 1177, 1178, and 1182 to alanine (HIR1177/78/82), although this mutant showed normal autophosphorylation.
81 10905491 Tumor necrosis factor-alpha induces hepatic insulin resistance in obese Zucker (fa/fa) rats via interaction of leukocyte antigen-related tyrosine phosphatase with focal adhesion kinase.
82 10905491 The molecular mechanism whereby tumor necrosis factor-alpha (TNF-alpha) induces insulin resistance in obesity is not well understood.
83 10905491 Previously, we have shown that inhibition of TNF-alpha improved hepatic insulin sensitivity in obese Zucker rats without altering the tyrosine phosphorylation of liver insulin receptors (IRs), which indicates that the TNF-alpha and insulin-signaling cascades interact distally to the IR.
84 10905491 To assess the effects of TNF-alpha on signaling molecules downstream from the IR, we analyzed the tyrosine phosphorylation patterns of liver homogenate proteins from TNF-alpha-neutralized fa/fa rats and showed that focal adhesion kinase (FAK) was consistently hyperphosphorylated (4.5-fold).
85 10905491 Moreover, intravenous insulin increased hepatic FAK phosphorylation in a time-dependent manner in Sprague-Dawley rats, which suggests that TNF-alpha may induce hepatic insulin resistance by preventing FAK phosphorylation in response to insulin treatment.
86 10905491 To explore the cellular mechanism whereby TNF-alpha regulates phosphorylation of FAK in the liver, we measured c-Src kinase activity and the abundance of 3 major protein tyrosine phosphatases (PTPs) (PTP-1B, leukocyte antigen-related tyrosine phosphatase [LAR], and src homology 2 domain-containing protein-tyrosine phosphatase [SHPTP-2]) in liver homogenates from obese Zucker rats after TNF-alpha blockade.
87 10905491 Hepatic c-Src kinase activity was unaltered, but LAR protein was reduced by 75%.
88 10905491 In addition, TNF-alpha blockade reduced hepatic PTP activity toward tyrosine phosphorylated FAK by 70%, and this was accounted for by immunodepletion of LAR.
89 10905491 Incubation of HepG2 cells with TNF-alpha increased LAR protein levels in a dose-dependent manner.
90 10905491 Additionally, pretreatment with TNF-alpha abolished insulin-stimulated tyrosine phosphorylation of FAK in HepG2 cells but had no effect on IR tyrosine phosphorylation or expression.
91 10905491 These data suggest that TNF-alpha promotes LAR expression and thus prevents insulin-mediated tyrosine phosphorylation of FAK.
92 10905491 This probably represents the interface between TNF-alpha and insulin signaling in the liver.
93 10905491 Tumor necrosis factor-alpha induces hepatic insulin resistance in obese Zucker (fa/fa) rats via interaction of leukocyte antigen-related tyrosine phosphatase with focal adhesion kinase.
94 10905491 The molecular mechanism whereby tumor necrosis factor-alpha (TNF-alpha) induces insulin resistance in obesity is not well understood.
95 10905491 Previously, we have shown that inhibition of TNF-alpha improved hepatic insulin sensitivity in obese Zucker rats without altering the tyrosine phosphorylation of liver insulin receptors (IRs), which indicates that the TNF-alpha and insulin-signaling cascades interact distally to the IR.
96 10905491 To assess the effects of TNF-alpha on signaling molecules downstream from the IR, we analyzed the tyrosine phosphorylation patterns of liver homogenate proteins from TNF-alpha-neutralized fa/fa rats and showed that focal adhesion kinase (FAK) was consistently hyperphosphorylated (4.5-fold).
97 10905491 Moreover, intravenous insulin increased hepatic FAK phosphorylation in a time-dependent manner in Sprague-Dawley rats, which suggests that TNF-alpha may induce hepatic insulin resistance by preventing FAK phosphorylation in response to insulin treatment.
98 10905491 To explore the cellular mechanism whereby TNF-alpha regulates phosphorylation of FAK in the liver, we measured c-Src kinase activity and the abundance of 3 major protein tyrosine phosphatases (PTPs) (PTP-1B, leukocyte antigen-related tyrosine phosphatase [LAR], and src homology 2 domain-containing protein-tyrosine phosphatase [SHPTP-2]) in liver homogenates from obese Zucker rats after TNF-alpha blockade.
99 10905491 Hepatic c-Src kinase activity was unaltered, but LAR protein was reduced by 75%.
100 10905491 In addition, TNF-alpha blockade reduced hepatic PTP activity toward tyrosine phosphorylated FAK by 70%, and this was accounted for by immunodepletion of LAR.
101 10905491 Incubation of HepG2 cells with TNF-alpha increased LAR protein levels in a dose-dependent manner.
102 10905491 Additionally, pretreatment with TNF-alpha abolished insulin-stimulated tyrosine phosphorylation of FAK in HepG2 cells but had no effect on IR tyrosine phosphorylation or expression.
103 10905491 These data suggest that TNF-alpha promotes LAR expression and thus prevents insulin-mediated tyrosine phosphorylation of FAK.
104 10905491 This probably represents the interface between TNF-alpha and insulin signaling in the liver.
105 10973497 DAF-16 recruits the CREB-binding protein coactivator complex to the insulin-like growth factor binding protein 1 promoter in HepG2 cells.
106 10973497 Insulin negatively regulates expression of the insulin-like growth factor binding protein 1 (IGFBP-1) gene by means of an insulin-responsive element (IRE) that also contributes to glucocorticoid stimulation of this gene.
107 10973497 We find that the Caenorhabditis elegans protein DAF-16 binds the IGFBP-1 small middle dotIRE with specificity similar to that of the forkhead (FKH) factor(s) that act both to enhance glucocorticoid responsiveness and to mediate the negative effect of insulin at this site.
108 10973497 In HepG2 cells, DAF-16 and its mammalian homologs, FKHR, FKHRL1, and AFX, activate transcription through the IGFBP-1.IRE; this effect is inhibited by the viral oncoprotein E1A, but not by mutants of E1A that fail to interact with the coactivator p300/CREB-binding protein (CBP).
109 10973497 We show that DAF-16 and FKHR can interact with both the KIX and E1A/SRC interaction domains of p300/CBP, as well as the steroid receptor coactivator (SRC).
110 10973497 A C-terminal deletion mutant of DAF-16 that is nonfunctional in C. elegans fails to bind the KIX domain of CBP, fails to activate transcription through the IGFBP-1.IRE, and inhibits activation of the IGFBP-1 promoter by glucocorticoids.
111 10973497 Although AFX interacts with the KIX domain of CBP, it does not interact with SRC and does not respond to glucocorticoids or insulin.
112 10973497 Thus, we conclude that DAF-16 and FKHR act as accessory factors to the glucocorticoid response, by recruiting the p300/CBP/SRC coactivator complex to an FKH factor site in the IGFBP-1 promoter, which allows the cell to integrate the effects of glucocorticoids and insulin on genes that carry this site.
113 11160694 Soluble mediators such as interleukin-1beta, tumor necrosis factor alpha (TNF-alpha), and inducible nitric oxide synthase (iNOS) produced from activated macrophages play an important role in the destruction of pancreatic beta cells in mice infected with a low dose of the D variant of encephalomyocarditis (EMC-D) virus.
114 11160694 We examined the activation of p59/p56(Hck), p55(Fgr), and p56/p53(Lyn) in macrophages from DBA/2 mice infected with the virus.
115 11160694 We found that p59/p56(Hck) showed a marked increase in both autophosphorylation and kinase activity at 48 h after infection, whereas p55(Fgr) and p56/p53(Lyn) did not.
116 11160694 The p59/p56(Hck) activity was closely correlated with the tyrosine phosphorylation level of Vav.
117 11160694 Treatment of EMC-D virus-infected mice with the Src kinase inhibitor, PP2, resulted in the inhibition of p59/p56(Hck) activity and almost complete inhibition of the production of TNF-alpha and iNOS in macrophages and the subsequent prevention of diabetes in mice.
118 11160694 On the basis of these observations, we conclude that the Src kinase, p59/p56(Hck), plays an important role in the activation of macrophages and the subsequent production of TNF-alpha and nitric oxide, leading to the destruction of pancreatic beta cells, which results in the development of diabetes in mice infected with a low dose of EMC-D virus.
119 11160694 Soluble mediators such as interleukin-1beta, tumor necrosis factor alpha (TNF-alpha), and inducible nitric oxide synthase (iNOS) produced from activated macrophages play an important role in the destruction of pancreatic beta cells in mice infected with a low dose of the D variant of encephalomyocarditis (EMC-D) virus.
120 11160694 We examined the activation of p59/p56(Hck), p55(Fgr), and p56/p53(Lyn) in macrophages from DBA/2 mice infected with the virus.
121 11160694 We found that p59/p56(Hck) showed a marked increase in both autophosphorylation and kinase activity at 48 h after infection, whereas p55(Fgr) and p56/p53(Lyn) did not.
122 11160694 The p59/p56(Hck) activity was closely correlated with the tyrosine phosphorylation level of Vav.
123 11160694 Treatment of EMC-D virus-infected mice with the Src kinase inhibitor, PP2, resulted in the inhibition of p59/p56(Hck) activity and almost complete inhibition of the production of TNF-alpha and iNOS in macrophages and the subsequent prevention of diabetes in mice.
124 11160694 On the basis of these observations, we conclude that the Src kinase, p59/p56(Hck), plays an important role in the activation of macrophages and the subsequent production of TNF-alpha and nitric oxide, leading to the destruction of pancreatic beta cells, which results in the development of diabetes in mice infected with a low dose of EMC-D virus.
125 11230339 Angiotensin II induces migration and Pyk2/paxillin phosphorylation of human monocytes.
126 11230339 Addition of the Ang II receptor type 1 (AT1-R) antagonist losartan (1 to 100 micromol/L) suppressed Ang II-induced migration of HPBM and THP-1 monocytes in a dose-dependent manner, demonstrating an AT1-R-mediated mechanism.
127 11230339 Ang II-directed migration was also blocked by the Src kinase inhibitor PP2 (10 micromol/L), by the extracellular-regulated protein kinase (ERK 1/2) inhibitor PD98059 (30 micromol/L), and by the p38-MAPK inhibitor SB203580 (10 micromol/L), indicating that Src, ERK 1/2, and p38 are all involved in Ang II-induced migration of HPBM and human THP-1 monocytes.
128 11230339 The proline-rich tyrosine kinase 2 (Pyk2) and paxillin are 2 cytoskeleton-associated proteins involved in cell movement, phosphorylated by Ang II in other cell types, and abundantly expressed in monocytes.
129 11230339 Ang II (1 micromol/L) induced Pyk2 and paxillin phosphorylation in human THP-1 monocytes, peaking after 10 minutes for Pyk2 with a 6.7+/-0.9-fold induction and after 2 minutes for paxillin with a 3.2+/-0.4-fold induction.
130 11230339 This study demonstrates a novel proatherogenic action of Ang II on human monocytes by stimulating their migration, through an AT1-R-dependent process, involving signaling through Src, ERK 1/2, and p38.
131 11230339 Furthermore, the promigratory actions of Ang II in human monocytes are associated with the phosphorylation of 2 cytoskeleton-associated proteins, Pyk2 and paxillin.
132 11230339 Angiotensin II induces migration and Pyk2/paxillin phosphorylation of human monocytes.
133 11230339 Addition of the Ang II receptor type 1 (AT1-R) antagonist losartan (1 to 100 micromol/L) suppressed Ang II-induced migration of HPBM and THP-1 monocytes in a dose-dependent manner, demonstrating an AT1-R-mediated mechanism.
134 11230339 Ang II-directed migration was also blocked by the Src kinase inhibitor PP2 (10 micromol/L), by the extracellular-regulated protein kinase (ERK 1/2) inhibitor PD98059 (30 micromol/L), and by the p38-MAPK inhibitor SB203580 (10 micromol/L), indicating that Src, ERK 1/2, and p38 are all involved in Ang II-induced migration of HPBM and human THP-1 monocytes.
135 11230339 The proline-rich tyrosine kinase 2 (Pyk2) and paxillin are 2 cytoskeleton-associated proteins involved in cell movement, phosphorylated by Ang II in other cell types, and abundantly expressed in monocytes.
136 11230339 Ang II (1 micromol/L) induced Pyk2 and paxillin phosphorylation in human THP-1 monocytes, peaking after 10 minutes for Pyk2 with a 6.7+/-0.9-fold induction and after 2 minutes for paxillin with a 3.2+/-0.4-fold induction.
137 11230339 This study demonstrates a novel proatherogenic action of Ang II on human monocytes by stimulating their migration, through an AT1-R-dependent process, involving signaling through Src, ERK 1/2, and p38.
138 11230339 Furthermore, the promigratory actions of Ang II in human monocytes are associated with the phosphorylation of 2 cytoskeleton-associated proteins, Pyk2 and paxillin.
139 11278940 c-Src tyrosine kinase binds the beta 2-adrenergic receptor via phospho-Tyr-350, phosphorylates G-protein-linked receptor kinase 2, and mediates agonist-induced receptor desensitization.
140 11278940 Downstream of binding to the receptor, Src phosphorylates and activates G-protein-linked receptor kinase 2 (GRK2), a response obligate for agonist-induced desensitization.
141 11278940 c-Src tyrosine kinase binds the beta 2-adrenergic receptor via phospho-Tyr-350, phosphorylates G-protein-linked receptor kinase 2, and mediates agonist-induced receptor desensitization.
142 11278940 Downstream of binding to the receptor, Src phosphorylates and activates G-protein-linked receptor kinase 2 (GRK2), a response obligate for agonist-induced desensitization.
143 11598137 Peroxisome proliferator-activated receptor gamma ligands inhibit mitogenic induction of p21(Cip1) by modulating the protein kinase Cdelta pathway in vascular smooth muscle cells.
144 11598137 PPARgamma ligands troglitazone (TRO, 10 microm) and rosiglitazone (RSG, 10 microm) attenuated the induction of p21(Cip1) protein by platelet-derived growth factor (PDGF) and insulin without affecting cognate mRNA levels in rat aortic smooth muscle cells (RASMC).
145 11598137 Kinetic studies using the protein synthesis inhibitor cycloheximide showed that TRO, RSG, and rottlerin shortened the half-life of p21(Cip1) protein.
146 11598137 TRO, RSG, and rottlerin inhibited PDGF-induced expression of p21(Cip1), but they did not affect insulin-induced expression of p21(Cip1).
147 11598137 Both ligands inhibited PKCdelta enzymatic activity in PDGF-stimulated RASMC but not in insulin-stimulated cells.
148 11598137 Adenovirus-mediated overexpression of PKCdelta rescued the down-regulation of p21(Cip1) expression both by TRO and RSG in PDGF-treated RASMC.
149 11598137 These data suggested that the PKCdelta pathway plays a critical role in PDGF-induced expression of p21(Cip1) in RASMC and may be the potential target for PPARgamma ligand effects.
150 11598137 Tyrosine phosphorylation and activation of c-Src in response to PDGF were unaffected by either PPARgamma ligand.
151 11598137 Both inhibitors also reversed PPARgamma ligand effects on p21(Cip1) expression in PDGF-treated RASMC.
152 11598137 PPARgamma ligands regulate p21(Cip1) at a post-translational level by blocking PKCdelta signaling and accelerating p21(Cip1) turnover.
153 11788655 Down-regulation of insulin receptor substrates (IRS)-1 and IRS-2 and Src homologous and collagen-like protein Shc gene expression by insulin in skeletal muscle is not associated with insulin resistance or type 2 diabetes.
154 11788655 To examine whether altered gene expression of insulin receptor substrates (IRS)-1 and IRS-2 and Src homologous and collagen-like protein Shc is an inherited trait and is associated with muscle insulin resistance or type 2 diabetes, we measured mRNA levels of these genes by a relative quantitative RT-PCR method in muscle biopsies taken before and after an insulin clamp from 12 monozygotic twin pairs discordant for type 2 diabetes and 12 control subjects.
155 11788655 Basal mRNA levels of IRS-1, IRS-2, and Shc were similar in the diabetic and nondiabetic twins as well as in the control subjects.
156 11788655 Insulin decreased mRNA expression of IRS-1 by 72% (from 0.75 +/- 0.06 to 0.21 +/- 0.04 relative units; P < 0.001), IRS-2 by 71% (from 0.55 +/- 0.10 to 0.16 +/- 0.08 relative units; P < 0.03), and Shc by 25% (from 0.95 +/- 0.04 to 0.71 +/- 0.04 relative units; P < 0.01) vs. baseline as demonstrated in the control subjects.
157 11788655 The postclamp Shc mRNA level was slightly higher in the diabetic twins (P = 0.05) but similar in the nondiabetic twins, as compared with the control subjects, whereas postclamp IRS-1 and IRS-2 mRNA levels were similar between the study groups.
158 11788655 However, the decrease in Shc gene expression by insulin was not significantly different between the study groups.
159 11788655 In conclusion, because insulin down-regulates IRS-1, IRS-2, and Shc gene expression in skeletal muscle in diabetic and nondiabetic monozygotic twins and control subjects to the same extent, it is unlikely that expression of these genes is an inherited trait or contributes to skeletal muscle insulin resistance.
160 11788655 Down-regulation of insulin receptor substrates (IRS)-1 and IRS-2 and Src homologous and collagen-like protein Shc gene expression by insulin in skeletal muscle is not associated with insulin resistance or type 2 diabetes.
161 11788655 To examine whether altered gene expression of insulin receptor substrates (IRS)-1 and IRS-2 and Src homologous and collagen-like protein Shc is an inherited trait and is associated with muscle insulin resistance or type 2 diabetes, we measured mRNA levels of these genes by a relative quantitative RT-PCR method in muscle biopsies taken before and after an insulin clamp from 12 monozygotic twin pairs discordant for type 2 diabetes and 12 control subjects.
162 11788655 Basal mRNA levels of IRS-1, IRS-2, and Shc were similar in the diabetic and nondiabetic twins as well as in the control subjects.
163 11788655 Insulin decreased mRNA expression of IRS-1 by 72% (from 0.75 +/- 0.06 to 0.21 +/- 0.04 relative units; P < 0.001), IRS-2 by 71% (from 0.55 +/- 0.10 to 0.16 +/- 0.08 relative units; P < 0.03), and Shc by 25% (from 0.95 +/- 0.04 to 0.71 +/- 0.04 relative units; P < 0.01) vs. baseline as demonstrated in the control subjects.
164 11788655 The postclamp Shc mRNA level was slightly higher in the diabetic twins (P = 0.05) but similar in the nondiabetic twins, as compared with the control subjects, whereas postclamp IRS-1 and IRS-2 mRNA levels were similar between the study groups.
165 11788655 However, the decrease in Shc gene expression by insulin was not significantly different between the study groups.
166 11788655 In conclusion, because insulin down-regulates IRS-1, IRS-2, and Shc gene expression in skeletal muscle in diabetic and nondiabetic monozygotic twins and control subjects to the same extent, it is unlikely that expression of these genes is an inherited trait or contributes to skeletal muscle insulin resistance.
167 11897556 Phosphoinositide 3-kinase (PI3K) plays a key role in insulin signaling and has been shown to be blunted in tissues of type 2 diabetes subjects.
168 11897556 There is emerging biochemical and, particularly, genetic evidence suggesting that insulin resistance can potentially be treated via modulation of PI3K by targeting PI3K itself or its up and down-stream modulators.
169 11897556 These potential targets include Src homology 2 domain containing inositol 5-phosphatase 2 (SHIP2), phosphatase and tensin homolog deleted on chromosome ten (PTEN), kappaB kinase beta (IKKbeta), PKC isoforms, and the PI3K p85 subunit.
170 11897556 There is evidence suggesting that their inhibition affects PI3K activity and improves insulin sensitivity in vivo.
171 11897556 In the current review, we will discuss the role of these molecules in insulin-mediated activation of PI3K, the rational for targeting these molecules for diabetes treatment, and some critical issues in terms of drug development.
172 12351660 The differentiation of skeletal muscle cells involves a protein-tyrosine phosphatase-alpha-mediated C-Src signaling pathway.
173 12351660 The different myogenic activities of these cell lines were correlated with the expression of myogenin and creatine kinase activity.
174 12351660 Consistent with previous reports, PTPalpha positively regulated the activity of the protein-tyrosine kinase Src.
175 12351660 Moreover, enhanced expression of PTPalpha and activation of Src was detected during myogenesis.
176 12351660 The differentiation of skeletal muscle cells involves a protein-tyrosine phosphatase-alpha-mediated C-Src signaling pathway.
177 12351660 The different myogenic activities of these cell lines were correlated with the expression of myogenin and creatine kinase activity.
178 12351660 Consistent with previous reports, PTPalpha positively regulated the activity of the protein-tyrosine kinase Src.
179 12351660 Moreover, enhanced expression of PTPalpha and activation of Src was detected during myogenesis.
180 12351660 The differentiation of skeletal muscle cells involves a protein-tyrosine phosphatase-alpha-mediated C-Src signaling pathway.
181 12351660 The different myogenic activities of these cell lines were correlated with the expression of myogenin and creatine kinase activity.
182 12351660 Consistent with previous reports, PTPalpha positively regulated the activity of the protein-tyrosine kinase Src.
183 12351660 Moreover, enhanced expression of PTPalpha and activation of Src was detected during myogenesis.
184 12502502 Glucagon-like peptide 1 induces pancreatic beta-cell proliferation via transactivation of the epidermal growth factor receptor.
185 12502502 We previously provided evidence that glucagon-like peptide 1 (GLP-1) induces pancreatic beta-cell growth nonadditively with glucose in a phosphatidylinositol (PI) 3-kinase- and protein kinase C zeta-dependent manner.
186 12502502 However, the exact mechanism by which the GLP-1 receptor (GLP-1R), a member of the G protein-coupled receptor (GPCR) superfamily, activates the PI 3-kinase signaling pathway to promote beta-cell growth remains unknown.
187 12502502 We hypothesized that the GLP-1R could activate PI 3-kinase and promote beta-cell proliferation through transactivation of the epidermal growth factor (EGF) receptor (EGFR), an event possibly linked to GPCRs via activation of c-Src and the production of putative endogenous EGF-like ligands.
188 12502502 Both the c-Src inhibitor PP1 and the EGFR-specific inhibitor AG1478 blocked GLP-1-induced [(3)H]thymidine incorporation in INS(832/13) cells as well as in isolated rat islets, while only AG1478 inhibited the proliferative action of betacellulin (BTC), an EGFR agonist.
189 12502502 A time-dependent increase in tyrosine phosphorylation of the EGFR in response to GLP-1 was observed in INS(832/13) cells.
190 12502502 This transactivation of the EGFR was sensitive to both the pharmacological agents PP1 and AG1478.
191 12502502 The action of GLP-1 and BTC on INS cell proliferation was found to be not additive.
192 12502502 GLP-1 treatment of INS cells caused a decrease in cell surface-associated BTC, as shown by FACS analysis.
193 12502502 The results are consistent with a model in which GLP-1 increases PI 3-kinase activity and enhances beta-cell proliferation via transactivation of the EGFR that would require the proteolytic processing of membrane-anchored BTC or other EGF-like ligands.
194 12502502 Glucagon-like peptide 1 induces pancreatic beta-cell proliferation via transactivation of the epidermal growth factor receptor.
195 12502502 We previously provided evidence that glucagon-like peptide 1 (GLP-1) induces pancreatic beta-cell growth nonadditively with glucose in a phosphatidylinositol (PI) 3-kinase- and protein kinase C zeta-dependent manner.
196 12502502 However, the exact mechanism by which the GLP-1 receptor (GLP-1R), a member of the G protein-coupled receptor (GPCR) superfamily, activates the PI 3-kinase signaling pathway to promote beta-cell growth remains unknown.
197 12502502 We hypothesized that the GLP-1R could activate PI 3-kinase and promote beta-cell proliferation through transactivation of the epidermal growth factor (EGF) receptor (EGFR), an event possibly linked to GPCRs via activation of c-Src and the production of putative endogenous EGF-like ligands.
198 12502502 Both the c-Src inhibitor PP1 and the EGFR-specific inhibitor AG1478 blocked GLP-1-induced [(3)H]thymidine incorporation in INS(832/13) cells as well as in isolated rat islets, while only AG1478 inhibited the proliferative action of betacellulin (BTC), an EGFR agonist.
199 12502502 A time-dependent increase in tyrosine phosphorylation of the EGFR in response to GLP-1 was observed in INS(832/13) cells.
200 12502502 This transactivation of the EGFR was sensitive to both the pharmacological agents PP1 and AG1478.
201 12502502 The action of GLP-1 and BTC on INS cell proliferation was found to be not additive.
202 12502502 GLP-1 treatment of INS cells caused a decrease in cell surface-associated BTC, as shown by FACS analysis.
203 12502502 The results are consistent with a model in which GLP-1 increases PI 3-kinase activity and enhances beta-cell proliferation via transactivation of the EGFR that would require the proteolytic processing of membrane-anchored BTC or other EGF-like ligands.
204 12730241 Because the other known PH-PTB proteins (insulin receptor substrates: IRS-1, IRS-2, IRS-3, and IRS-4, and the downstream of kinases: DOK-1, DOK-2, and DOK-3) are substrates of insulin and insulin-like growth factor (IGF)-1 receptors, we asked whether these new proteins, termed IRS5/DOK4 and IRS6/DOK5, might also have roles in insulin and IGF-1 signaling.
205 12730241 Both proteins are tyrosine-phosphorylated in response to insulin and IGF-1 in transfected cells, although the kinetics differ.
206 12730241 Insulin receptor-phosphorylated IRS5/DOK4 associates with RasGAP, Crk, Src, and Fyn, but not phosphatidylinositol 3-kinase p85, Grb2, SHP-2, Nck, or phospholipase Cgamma Src homology 2 domains, and activates MAPK in cells.
207 12730241 IRS5/DOK4 and IRS6/DOK5 represent two new signaling proteins with potential roles in insulin and IGF-1 action.
208 14568990 Role of the pleckstrin homology domain of PLCgamma1 in its interaction with the insulin receptor.
209 14568990 A thiol-reactive membrane-associated protein (TRAP) binds covalently to the cytoplasmic domain of the human insulin receptor (IR) beta-subunit when cells are treated with the homobifunctional cross-linker reagent 1,6-bismaleimidohexane.
210 14568990 Here, TRAP was found to be phospholipase C gamma1 (PLCgamma1) by mass spectrometry analysis.
211 14568990 Insulin increased PLCgamma1 tyrosine phosphorylation at Tyr-783 and its colocalization with the IR in punctated structures enriched in cortical actin at the dorsal plasma membrane.
212 14568990 This association was found to be independent of PLCgamma1 Src homology 2 domains, and instead required the pleckstrin homology (PH)-EF-hand domain.
213 14568990 Expression of the PH-EF construct blocked endogenous PLCgamma1 binding to the IR and inhibited insulin-dependent phosphorylation of mitogen-activated protein kinase (MAPK), but not AKT.
214 14568990 Silencing PLCgamma1 expression using small interfering RNA markedly reduced insulin-dependent MAPK regulation in HepG2 cells.
215 14568990 Conversely, reconstitution of PLCgamma1 in PLCgamma1-/- fibroblasts improved MAPK activation by insulin.
216 14568990 Our results show that PLCgamma1 is a thiol-reactive protein whose association with the IR could contribute to the activation of MAPK signaling by insulin.
217 15044356 GLP-1 receptor activation enhances beta-cell proliferation and promotes islet neogenesis via activation of pdx-1 expression.
218 15044356 The proliferative effects of GLP-1 appear to involve multiple intracellular pathways, including stimulation of Akt, activation of protein kinase Czeta, and transactivation of the epidermal growth factor receptor through the c-src kinase.
219 15044356 GLP-1 receptor activation also promotes cell survival in beta-cells and neurons via increased levels of cAMP leading to cAMP response element binding protein activation, enhanced insulin receptor substrate-2 activity and, ultimately, activation of Akt.
220 15265871 Further, either depletion of mitochondria or adenoviral overexpression of superoxide dismutases, as well as inhibition of nitric-oxide synthase, abolished the metformin-enhanced phosphorylations and activities of AMPK, implicating that activation of AMPK by metformin might be mediated by the mitochondria-derived RNS.
221 15265871 Furthermore, administration of metformin, which increased 3-nitrotyrosine staining in hearts of C57BL6, resulted in parallel activation of AMPK in the aorta and hearts of C57BL6 mice but not in those of endothelial nitric-oxide synthase (eNOS) knockout mice in which metformin had no effect on 3-nitrotyrosine staining.
222 15265871 Because the eNOS knockout mice expressed normal levels of AMPK-alpha that was activated by 5-aminoimidazole-4-carboxamide riboside, an AMPK agonist, these data indicate that RNS generated by metformin is required for AMPK activation in vivo.
223 15265871 In addition, metformin significantly increased the co-immunoprecipitation of AMPK and its upstream kinase, LKB1, in C57BL6 mice administered to metformin in vivo.
224 15265871 Using pharmacological and genetic inhibitors, we found that inhibition of either c-Src or PI3K abolished AMPK that was enhanced by metformin.
225 15265871 We conclude that activation of AMPK by metformin might be mediated by mitochondria-derived RNS, and activation of the c-Src/PI3K pathway might generate a metabolite or other molecule inside the cell to promote AMPK activation by the LKB1 complex.
226 15265871 Further, either depletion of mitochondria or adenoviral overexpression of superoxide dismutases, as well as inhibition of nitric-oxide synthase, abolished the metformin-enhanced phosphorylations and activities of AMPK, implicating that activation of AMPK by metformin might be mediated by the mitochondria-derived RNS.
227 15265871 Furthermore, administration of metformin, which increased 3-nitrotyrosine staining in hearts of C57BL6, resulted in parallel activation of AMPK in the aorta and hearts of C57BL6 mice but not in those of endothelial nitric-oxide synthase (eNOS) knockout mice in which metformin had no effect on 3-nitrotyrosine staining.
228 15265871 Because the eNOS knockout mice expressed normal levels of AMPK-alpha that was activated by 5-aminoimidazole-4-carboxamide riboside, an AMPK agonist, these data indicate that RNS generated by metformin is required for AMPK activation in vivo.
229 15265871 In addition, metformin significantly increased the co-immunoprecipitation of AMPK and its upstream kinase, LKB1, in C57BL6 mice administered to metformin in vivo.
230 15265871 Using pharmacological and genetic inhibitors, we found that inhibition of either c-Src or PI3K abolished AMPK that was enhanced by metformin.
231 15265871 We conclude that activation of AMPK by metformin might be mediated by mitochondria-derived RNS, and activation of the c-Src/PI3K pathway might generate a metabolite or other molecule inside the cell to promote AMPK activation by the LKB1 complex.
232 15314154 Disruption of the SH2-B gene causes age-dependent insulin resistance and glucose intolerance.
233 15314154 SH2-B, an Src homology 2 (SH2) and pleckstrin homology domain-containing adaptor protein, binds via its SH2 domain to insulin receptor in response to insulin; however, its physiological role remains unclear.
234 15314154 Systemic deletion of SH2-B impaired insulin receptor activation and signaling in the liver, skeletal muscle, and fat, including tyrosine phosphorylation of insulin receptor substrate 1 (IRS1) and IRS2 and activation of the phosphatidylinositol 3-kinase/Akt and the Erk1/2 pathways.
235 15314154 Moreover, SH2-B directly enhanced autophosphorylation of insulin receptor and tyrosine phosphorylation of IRS1 and IRS2 in an SH2 domain-dependent manner in cultured cells.
236 15314154 Our data suggest that SH2-B is a physiological enhancer of insulin receptor activation and is required for maintaining normal insulin sensitivity and glucose homeostasis during aging.
237 15544473 In the field of PTPs, the research was mainly focused on new and selective PTP1B inhibitors, possibly useful in the treatment of Type 2 diabetes.
238 15544473 Other neutral compounds, mainly quinones, were found to inhibit CD45 and Cdc25.
239 15544473 Several papers have appeared in recent years on the discovery of new Grb2, Src, Syk, and Lck SH2 domains binding antagonists.
240 15544473 As regards Grb2, Src and Lck SH2 domains, rigidification of the starting high affinity binding peptides afforded derivatives with improved affinity; cellular activity was achieved by modification of the side chains of these inhibitors.
241 15544473 In the field of PTPs, the research was mainly focused on new and selective PTP1B inhibitors, possibly useful in the treatment of Type 2 diabetes.
242 15544473 Other neutral compounds, mainly quinones, were found to inhibit CD45 and Cdc25.
243 15544473 Several papers have appeared in recent years on the discovery of new Grb2, Src, Syk, and Lck SH2 domains binding antagonists.
244 15544473 As regards Grb2, Src and Lck SH2 domains, rigidification of the starting high affinity binding peptides afforded derivatives with improved affinity; cellular activity was achieved by modification of the side chains of these inhibitors.
245 15573145 However, the localization of NMT is reversed by treatment with a calpain inhibitor (ALLM N-Ac-Leu-Leu-methioninal).
246 15573145 During ischemia-reperfusion, the degradation of c-Src, which is a substrate of NMT, was observed.
247 15573145 Streptozotocin-induced diabetes (an animal model for insulin-dependent diabetes mellitus) resulted in a 2.0-fold increase in rat liver NMT activity as compared with control animals.
248 15573145 In obese (fa/fa) Zucker rats (an animal model for non-insulin-dependent diabetes mellitus), there was an approximately 4.7-fold lower liver particulate NMT activity as compared with control lean rat livers.
249 15573145 These results would indicate that rat liver particulate NMT activity appears to be inversely proportional to the level of plasma insulin, implicating insulin in the control of N-myristoylation.
250 15750341 The Src/PLC/PKC/MEK/ERK signaling pathway is involved in aortic smooth muscle cell proliferation induced by glycated LDL.
251 15750341 We examined the effects of native LDL and glycated LDL on the extracellular signal-regulated kinase (ERK) pathway.
252 15750341 ERK phosphorylation was not affected by exposure to the Ca2+ chelator BAPTA-AM but inhibition of protein kinase C (PKC) with GF109203X, inhibition of Src kinase with PP1 (5 microM) and inhibition of phospholipase C (PLC) with U73122/U73343 (5 microM) all reduced ERK phosphorylation in response to glycated LDL.
253 15750341 These findings indicate that ERK phosphorylation in response to glycated LDL involves the activation of PKC, PLC, and MEK, but is independent of intracellular Ca2+.
254 15866871 Protein-tyrosine phosphatase 1B (PTP1B) is a key negative regulator of insulin and leptin signaling and a novel therapeutic target for the treatment of type 2 diabetes, obesity, and other associated metabolic syndromes.
255 15866871 We show that down-regulation of PTP1B activity with small molecule inhibitors suppresses cell spreading and migration to fibronectin, increases Tyr(527) phosphorylation in Src, and decreases phosphorylation of FAK, p130(Cas), and ERK1/2.
256 15866871 We also show that PTP1B forms a complex with Src and p130(Cas), and that the proline-rich motif PPRPPK (residues 309-314) in PTP1B is essential for the complex formation.
257 15866871 We suggest that the specificity of PTP1B for Src pTyr(527) is mediated by protein-protein interactions involving the docking protein p130(Cas) with both Src and PTP1B in addition to the interactions between the PTP1B active site and the pTyr(527) motif.
258 15866871 Protein-tyrosine phosphatase 1B (PTP1B) is a key negative regulator of insulin and leptin signaling and a novel therapeutic target for the treatment of type 2 diabetes, obesity, and other associated metabolic syndromes.
259 15866871 We show that down-regulation of PTP1B activity with small molecule inhibitors suppresses cell spreading and migration to fibronectin, increases Tyr(527) phosphorylation in Src, and decreases phosphorylation of FAK, p130(Cas), and ERK1/2.
260 15866871 We also show that PTP1B forms a complex with Src and p130(Cas), and that the proline-rich motif PPRPPK (residues 309-314) in PTP1B is essential for the complex formation.
261 15866871 We suggest that the specificity of PTP1B for Src pTyr(527) is mediated by protein-protein interactions involving the docking protein p130(Cas) with both Src and PTP1B in addition to the interactions between the PTP1B active site and the pTyr(527) motif.
262 16141358 Pleiotropic AT1 receptor signaling pathways mediating physiological and pathogenic actions of angiotensin II.
263 16141358 Angiotensin II (Ang II) activates a wide spectrum of signaling responses via the AT1 receptor (AT1R) that mediate its physiological control of blood pressure, thirst, and sodium balance and its diverse pathological actions in cardiovascular, renal, and other cell types.
264 16141358 Ang II-induced AT1R activation via Gq/11 stimulates phospholipases A2, C, and D, and activates inositol trisphosphate/Ca2+ signaling, protein kinase C isoforms, and MAPKs, as well as several tyrosine kinases (Pyk2, Src, Tyk2, FAK), scaffold proteins (G protein-coupled receptor kinase-interacting protein 1, p130Cas, paxillin, vinculin), receptor tyrosine kinases, and the nuclear factor-kappaB pathway.
265 16141358 The AT1R also signals via Gi/o and G11/12 and stimulates G protein-independent signaling pathways, such as beta-arrestin-mediated MAPK activation and the Jak/STAT.
266 16141358 Many of the deleterious actions of AT1R activation are initiated by locally generated, rather than circulating, Ang II and are concomitant with the harmful effects of aldosterone in the cardiovascular system.
267 16141358 The recognition of Ang II's pathogenic actions is leading to novel clinical applications of angiotensin-converting enzyme inhibitors and AT1R antagonists, in addition to their established therapeutic actions in essential hypertension.
268 16344371 Peroxisome proliferator-activated receptor gamma regulates angiotensin II-stimulated phosphatidylinositol 3-kinase and mitogen-activated protein kinase in blood vessels in vivo.
269 16344371 Angiotensin (Ang) II is implicated in hypertension, vascular remodeling, and insulin resistance.
270 16344371 Peroxisome proliferator-activated receptor (PPAR) gamma activators increase insulin sensitivity and improve Ang II-induced vascular remodeling.
271 16344371 We evaluated the effects of the PPAR-gamma activator rosiglitazone on Ang II signaling in aorta and mesenteric arteries.
272 16344371 Akt activity was increased by Ang II and returned to basal levels under rosiglitazone in both vascular beds.
273 16344371 However, Ang II-induced extracellular signal-regulated kinase 1/2 activity increased in aorta but not in mesenteric vessels (P<0.001), where 4E-binding protein 1 activity was significantly increased by Ang II and inhibited by PPAR-gamma activation.
274 16344371 In response to Ang II, Src homology (SH) 2-containing inositol phosphatase 2 activity was increased (P<0.05) in both vascular beds.
275 16344371 In conclusion, PPAR-gamma activator rosiglitazone attenuated Ang II-induced blood pressure elevation and intracellular signaling on aorta and mesenteric vessels.
276 16344371 There was differential inhibition of Ang II type 1 receptor receptors/phosphatidylinositol 3-kinase/Akt and extracellular signal-regulated kinase 1/2 in both vessels.
277 16767106 Angiotensin II-dependent Src and Smad1 signaling pathway is crucial for the development of diabetic nephropathy.
278 16767106 We have reported that Smad1 plays a key role in diabetic mesangial matrix expansion and directly regulates the transcription of type IV collagen (Col4) in vitro and in vivo.
279 16767106 Here we examined the effect of Ang II on the expression of Smad1 and mesangial matrix expansion in streptozotocin (STZ)-induced diabetic rats in vivo, using Ang II type 1 receptor blocker, olmesartan.
280 16767106 Ang II induced Col4 synthesis and increased expression of phospho-Src and phospho-Smad1 in cultured mesangial cells, which was blocked by olmesartan.
281 16767106 Taken together, these results indicate that Ang II can regulate the development of mesangial matrix expansion in the early phase of diabetic nephropathy through Src and Smad1.
282 16767106 Angiotensin II-dependent Src and Smad1 signaling pathway is crucial for the development of diabetic nephropathy.
283 16767106 We have reported that Smad1 plays a key role in diabetic mesangial matrix expansion and directly regulates the transcription of type IV collagen (Col4) in vitro and in vivo.
284 16767106 Here we examined the effect of Ang II on the expression of Smad1 and mesangial matrix expansion in streptozotocin (STZ)-induced diabetic rats in vivo, using Ang II type 1 receptor blocker, olmesartan.
285 16767106 Ang II induced Col4 synthesis and increased expression of phospho-Src and phospho-Smad1 in cultured mesangial cells, which was blocked by olmesartan.
286 16767106 Taken together, these results indicate that Ang II can regulate the development of mesangial matrix expansion in the early phase of diabetic nephropathy through Src and Smad1.
287 16973905 APOE4-VLDL inhibits the HDL-activated phosphatidylinositol 3-kinase/Akt Pathway via the phosphoinositol phosphatase SHIP2.
288 16973905 We show that APOE4-VLDL diminishes the phosphorylation of Akt by HDL but does not alter phosphorylation of c-Jun N-terminal kinase, p38, or Src family kinases by HDL.
289 16973905 Furthermore APOE4-VLDL inhibits Akt phosphorylation by reducing the phosphatidylinositol 3-kinase product phosphatidylinositol-(3,4,5)-triphosphate (PI[3,4,5]P3).
290 16973905 Therefore the activation of SHIP2 by APOE4-VLDL, with the subsequent inhibition of the HDL/Akt pathway, is a novel and significant biological mechanism and may be a critical intermediate by which APOE4 increases the risk of atherosclerotic CVD.
291 17272398 Exposure of both murine and human podocytes to GH (50-500 ng/ml) resulted in an increase in abundance of phosphorylated signal transducer and activator of transcription-5, Janus kinase-2, and ERK1/2 proteins.
292 17272398 Exposure of podocytes to GH also caused changes in the intracellular distribution of the Janus kinase-2 adapter protein Src homology 2-Bbeta, stimulation of focal adhesion kinase, increase in reactive oxygen species, and GH-dependent changes in the actin cytoskeleton.
293 17306383 CCK causes PKD1 activation in pancreatic acini by signaling through PKC-delta and PKC-independent pathways.
294 17306383 CCK activated PKD1 and caused a time- and dose-dependent increase in serine phosphorylation by activation of high- and low-affinity CCK(A) receptor states.
295 17306383 Inhibition of CCK-stimulated increases in phospholipase C, PKC activity or intracellular calcium decreased PKD1 S916 phosphorylation by 56%, 62% and 96%, respectively.
296 17306383 Inhibition of Src/PI3K/MAPK/tyrosine phosphorylation had no effect.
297 17306383 These results demonstrate that CCK(A) receptor activation leads to PKD activation by signaling through PKC-dependent and PKC-independent pathways.
298 17494630 These pathways, which may be activated simultaneously or selectively, elevate [Ca(2+)](i), activate Src and the ERK1/2 kinase pathways, and activate phosphoinositide 3-kinase and protein kinase B (Akt), NF-kappaB, and reactive oxygen species.
299 17991742 c-Src is required for tropomyosin receptor kinase C (TrkC)-induced activation of the phosphatidylinositol 3-kinase (PI3K)-AKT pathway.
300 17991742 TrkC expression leads to the constitutive activation of two major effector pathways, namely the Ras-MAP kinase (MAPK) mitogenic pathway and the phosphatidylinositol 3-kinase (PI3K)-AKT pathway mediating cell survival.
301 17991742 Here we define some aspects of the molecular mechanisms regulating TrkC-dependent Ras-Erk1/2 and PI3K/Akt activation.
302 17991742 We show that endogenous TrkC associated with c-Src in human and mouse cancer cells which express TrkC.
303 17991742 Suppression of c-Src by RNA interference in highly metastatic 4T1 mammary cancer cells, which express endogenous TrkC, resulted in markedly decreased expression of cyclin D1 and suppression of activation of Ras-Erk1/2 and PI3K-Akt.
304 17991742 Furthermore, in c-Src-deficient SYF cells, TrkC failed to activate the PI3K-Atk pathway, but not the Ras-Erk1/2 pathway.
305 17991742 Therefore these data indicate that TrkC induces the PI3K-Akt cascade through the activation of c-Src.
306 17991742 c-Src is required for tropomyosin receptor kinase C (TrkC)-induced activation of the phosphatidylinositol 3-kinase (PI3K)-AKT pathway.
307 17991742 TrkC expression leads to the constitutive activation of two major effector pathways, namely the Ras-MAP kinase (MAPK) mitogenic pathway and the phosphatidylinositol 3-kinase (PI3K)-AKT pathway mediating cell survival.
308 17991742 Here we define some aspects of the molecular mechanisms regulating TrkC-dependent Ras-Erk1/2 and PI3K/Akt activation.
309 17991742 We show that endogenous TrkC associated with c-Src in human and mouse cancer cells which express TrkC.
310 17991742 Suppression of c-Src by RNA interference in highly metastatic 4T1 mammary cancer cells, which express endogenous TrkC, resulted in markedly decreased expression of cyclin D1 and suppression of activation of Ras-Erk1/2 and PI3K-Akt.
311 17991742 Furthermore, in c-Src-deficient SYF cells, TrkC failed to activate the PI3K-Atk pathway, but not the Ras-Erk1/2 pathway.
312 17991742 Therefore these data indicate that TrkC induces the PI3K-Akt cascade through the activation of c-Src.
313 17991742 c-Src is required for tropomyosin receptor kinase C (TrkC)-induced activation of the phosphatidylinositol 3-kinase (PI3K)-AKT pathway.
314 17991742 TrkC expression leads to the constitutive activation of two major effector pathways, namely the Ras-MAP kinase (MAPK) mitogenic pathway and the phosphatidylinositol 3-kinase (PI3K)-AKT pathway mediating cell survival.
315 17991742 Here we define some aspects of the molecular mechanisms regulating TrkC-dependent Ras-Erk1/2 and PI3K/Akt activation.
316 17991742 We show that endogenous TrkC associated with c-Src in human and mouse cancer cells which express TrkC.
317 17991742 Suppression of c-Src by RNA interference in highly metastatic 4T1 mammary cancer cells, which express endogenous TrkC, resulted in markedly decreased expression of cyclin D1 and suppression of activation of Ras-Erk1/2 and PI3K-Akt.
318 17991742 Furthermore, in c-Src-deficient SYF cells, TrkC failed to activate the PI3K-Atk pathway, but not the Ras-Erk1/2 pathway.
319 17991742 Therefore these data indicate that TrkC induces the PI3K-Akt cascade through the activation of c-Src.
320 17991742 c-Src is required for tropomyosin receptor kinase C (TrkC)-induced activation of the phosphatidylinositol 3-kinase (PI3K)-AKT pathway.
321 17991742 TrkC expression leads to the constitutive activation of two major effector pathways, namely the Ras-MAP kinase (MAPK) mitogenic pathway and the phosphatidylinositol 3-kinase (PI3K)-AKT pathway mediating cell survival.
322 17991742 Here we define some aspects of the molecular mechanisms regulating TrkC-dependent Ras-Erk1/2 and PI3K/Akt activation.
323 17991742 We show that endogenous TrkC associated with c-Src in human and mouse cancer cells which express TrkC.
324 17991742 Suppression of c-Src by RNA interference in highly metastatic 4T1 mammary cancer cells, which express endogenous TrkC, resulted in markedly decreased expression of cyclin D1 and suppression of activation of Ras-Erk1/2 and PI3K-Akt.
325 17991742 Furthermore, in c-Src-deficient SYF cells, TrkC failed to activate the PI3K-Atk pathway, but not the Ras-Erk1/2 pathway.
326 17991742 Therefore these data indicate that TrkC induces the PI3K-Akt cascade through the activation of c-Src.
327 17991742 c-Src is required for tropomyosin receptor kinase C (TrkC)-induced activation of the phosphatidylinositol 3-kinase (PI3K)-AKT pathway.
328 17991742 TrkC expression leads to the constitutive activation of two major effector pathways, namely the Ras-MAP kinase (MAPK) mitogenic pathway and the phosphatidylinositol 3-kinase (PI3K)-AKT pathway mediating cell survival.
329 17991742 Here we define some aspects of the molecular mechanisms regulating TrkC-dependent Ras-Erk1/2 and PI3K/Akt activation.
330 17991742 We show that endogenous TrkC associated with c-Src in human and mouse cancer cells which express TrkC.
331 17991742 Suppression of c-Src by RNA interference in highly metastatic 4T1 mammary cancer cells, which express endogenous TrkC, resulted in markedly decreased expression of cyclin D1 and suppression of activation of Ras-Erk1/2 and PI3K-Akt.
332 17991742 Furthermore, in c-Src-deficient SYF cells, TrkC failed to activate the PI3K-Atk pathway, but not the Ras-Erk1/2 pathway.
333 17991742 Therefore these data indicate that TrkC induces the PI3K-Akt cascade through the activation of c-Src.
334 18295448 Angiotensin II (Ang II)-induced renal injury is partly mediated by growth factors such as VEGF.
335 18295448 We have previously shown that Ang II rapidly increases VEGF protein synthesis in proximal tubular epithelial (MCT) cells by augmenting mRNA translation, which is partly dependent on activation and binding of hnRNP K to 3' untranslated region (UTR) of VEGF mRNA.
336 18295448 Transfection with a PKCdelta siRNA inhibited hnRNP K Ser302 phosphorylation and activation, and reduced Ang II stimulation of VEGF synthesis.
337 18295448 Augmented VEGF expression was associated with increased binding of hnRNP K to VEGF mRNA. c-src and PKCdelta activities and hnRNP K phosphorylation on Ser302 in renal cortex of db/db mice were increased compared to control mice.
338 18295448 We conclude: Ang II-induced VEGF mRNA translation is associated with activation of hnRNP K in MCT cells.
339 18295448 In the signaling pathway leading to hnRNP K activation induced by Ang II, PKCdelta is downstream of c-src.
340 18295448 PKCdelta-mediated phosphorylation of hnRNP K is required for Ang II stimulation of VEGF mRNA translation.
341 18295448 Angiotensin II (Ang II)-induced renal injury is partly mediated by growth factors such as VEGF.
342 18295448 We have previously shown that Ang II rapidly increases VEGF protein synthesis in proximal tubular epithelial (MCT) cells by augmenting mRNA translation, which is partly dependent on activation and binding of hnRNP K to 3' untranslated region (UTR) of VEGF mRNA.
343 18295448 Transfection with a PKCdelta siRNA inhibited hnRNP K Ser302 phosphorylation and activation, and reduced Ang II stimulation of VEGF synthesis.
344 18295448 Augmented VEGF expression was associated with increased binding of hnRNP K to VEGF mRNA. c-src and PKCdelta activities and hnRNP K phosphorylation on Ser302 in renal cortex of db/db mice were increased compared to control mice.
345 18295448 We conclude: Ang II-induced VEGF mRNA translation is associated with activation of hnRNP K in MCT cells.
346 18295448 In the signaling pathway leading to hnRNP K activation induced by Ang II, PKCdelta is downstream of c-src.
347 18295448 PKCdelta-mediated phosphorylation of hnRNP K is required for Ang II stimulation of VEGF mRNA translation.
348 18387322 Platelets from type 2 diabetic patients show an enhanced endogenous reactive oxygen species production and a reduced antioxidant capability, which increase the activity of several tyrosine kinases, such as the Bruton's tyrosine kinase, MAP kinases or proteins of the SRC family.
349 18483622 Retinal vascular permeability suppression by topical application of a novel VEGFR2/Src kinase inhibitor in mice and rabbits.
350 18483622 We have found that vascular leakage following intravitreal administration of VEGF in mice was abolished by systemic or topical delivery of what we believe is a novel VEGFR2/Src kinase inhibitor; this was confirmed in rabbits.
351 18483622 The relevance of Src inhibition to VEGF-associated alterations in vascular permeability was further substantiated by genetic studies in which VEGF injection or laser-induced vascular permeability failed to augment retinal vascular permeability in Src-/- and Yes-/- mice (Src and Yes are ubiquitously expressed Src kinase family members; Src-/- and Yes-/- mice lacking expression of these kinases show no vascular leak in response to VEGF).
352 18483622 Retinal vascular permeability suppression by topical application of a novel VEGFR2/Src kinase inhibitor in mice and rabbits.
353 18483622 We have found that vascular leakage following intravitreal administration of VEGF in mice was abolished by systemic or topical delivery of what we believe is a novel VEGFR2/Src kinase inhibitor; this was confirmed in rabbits.
354 18483622 The relevance of Src inhibition to VEGF-associated alterations in vascular permeability was further substantiated by genetic studies in which VEGF injection or laser-induced vascular permeability failed to augment retinal vascular permeability in Src-/- and Yes-/- mice (Src and Yes are ubiquitously expressed Src kinase family members; Src-/- and Yes-/- mice lacking expression of these kinases show no vascular leak in response to VEGF).
355 18483622 Retinal vascular permeability suppression by topical application of a novel VEGFR2/Src kinase inhibitor in mice and rabbits.
356 18483622 We have found that vascular leakage following intravitreal administration of VEGF in mice was abolished by systemic or topical delivery of what we believe is a novel VEGFR2/Src kinase inhibitor; this was confirmed in rabbits.
357 18483622 The relevance of Src inhibition to VEGF-associated alterations in vascular permeability was further substantiated by genetic studies in which VEGF injection or laser-induced vascular permeability failed to augment retinal vascular permeability in Src-/- and Yes-/- mice (Src and Yes are ubiquitously expressed Src kinase family members; Src-/- and Yes-/- mice lacking expression of these kinases show no vascular leak in response to VEGF).
358 18602447 This process is triggered by hGH-stimulated activation of the non-receptor tyrosine kinases JAK2 and c-Src, which causes tyrosine phosphorylation of RyRs, resulting in sensitization of CICR.
359 18602447 The rise in [Ca(2+)](i) elicited by hGH is associated with an enhanced insulin secretion, effects that are mediated mainly through the prolactin receptor.
360 18602447 These mechanisms indicate that a rise in [Ca(2+)](i) elicited by activation of PRLR is JAK2-dependent and is associated with enhanced insulin secretion.
361 18602447 In contrast, GH receptor-mediated increase in [Ca(2+)](i) is JAK2-independent and is dissociated from insulin secretion.
362 18633106 Integrin-associated protein association with SRC homology 2 domain containing tyrosine phosphatase substrate 1 regulates igf-I signaling in vivo.
363 18635660 Expression of Src homology 2 domain-containing protein tyrosine phosphatase substrate-1 in pancreatic beta-Cells and its role in promotion of insulin secretion and protection against diabetes.
364 18635660 Transmembrane proteins Src homology 2 domain-containing protein tyrosine phosphatase substrate-1 (SHPS-1) and its ligand CD47 interact through their extracellular regions and contribute to intercellular communication.
365 18635660 We now show that both SHPS-1 and CD47 are prominently expressed in beta-cells of the pancreas.
366 18635660 The plasma insulin level in the randomly fed state was markedly reduced in mice that express a mutant form of SHPS-1 lacking most of the cytoplasmic region compared with that in wild-type (WT) mice, although the blood glucose concentrations of the two types of mice were similar.
367 18635660 This reduction in the plasma insulin level of SHPS-1 mutant mice was even more pronounced in animals maintained on a high-fat diet.
368 18635660 Glucose tolerance was also markedly impaired in SHPS-1 mutant mice on a high-fat diet, whereas both peripheral insulin sensitivity and the insulin content of the pancreas in the mutant animals were similar to those of WT mice.
369 18635660 Glucose-stimulated insulin secretion was similar for islets isolated from WT or SHPS-1 mutant mice.
370 18635660 These results suggest that SHPS-1 promotes insulin secretion from beta-cells and thereby protects against diabetes.
371 18635660 Preventing of alpha2-adrenergic receptor-mediated inhibition of insulin secretion may partly participate in such a function of SHPS-1.
372 18635660 Expression of Src homology 2 domain-containing protein tyrosine phosphatase substrate-1 in pancreatic beta-Cells and its role in promotion of insulin secretion and protection against diabetes.
373 18635660 Transmembrane proteins Src homology 2 domain-containing protein tyrosine phosphatase substrate-1 (SHPS-1) and its ligand CD47 interact through their extracellular regions and contribute to intercellular communication.
374 18635660 We now show that both SHPS-1 and CD47 are prominently expressed in beta-cells of the pancreas.
375 18635660 The plasma insulin level in the randomly fed state was markedly reduced in mice that express a mutant form of SHPS-1 lacking most of the cytoplasmic region compared with that in wild-type (WT) mice, although the blood glucose concentrations of the two types of mice were similar.
376 18635660 This reduction in the plasma insulin level of SHPS-1 mutant mice was even more pronounced in animals maintained on a high-fat diet.
377 18635660 Glucose tolerance was also markedly impaired in SHPS-1 mutant mice on a high-fat diet, whereas both peripheral insulin sensitivity and the insulin content of the pancreas in the mutant animals were similar to those of WT mice.
378 18635660 Glucose-stimulated insulin secretion was similar for islets isolated from WT or SHPS-1 mutant mice.
379 18635660 These results suggest that SHPS-1 promotes insulin secretion from beta-cells and thereby protects against diabetes.
380 18635660 Preventing of alpha2-adrenergic receptor-mediated inhibition of insulin secretion may partly participate in such a function of SHPS-1.
381 18945941 High glucose promotes retinal endothelial cell migration through activation of Src, PI3K/Akt1/eNOS, and ERKs.
382 18945941 Retinal EC under high-glucose conditions also expressed increased levels of fibronectin, osteopontin, and alpha(v)beta(3)-integrin, and reduced levels of thrombospondin-1.
383 18945941 These changes were concomitant with sustained activation of the downstream prosurvival and promigratory signaling pathways, including Src kinase, phosphatidylinositol 3-kinase/Akt1/endothelial nitric oxide synthase, and ERKs.
384 19122674 Further investigation reveals that insulin stimulates the formation of a new beta-arrestin-2 signal complex, in which beta-arrestin-2 scaffolds Akt and Src to insulin receptor.
385 19135126 Ang-II-induced Ca(2+) influx was blocked by neither VDCC nor c-src inhibition but was sensitive to inositol 1,4,5-trisphosphate receptor inhibition, lanthanide and the diacylglycerol analogue, oleoyl-2-acetyl-sn-glycerol.
386 19230846 Inhibition of PI3 kinase and Src kinases decreased (p < 0.05) G6PD activity in the fa/fa but not in the lean rat liver, suggesting that G6PD activity is regulated by PI3/Src kinase signaling pathways.
387 19230846 G6PD-derived NADPH increased (p < 0.05) superoxide anion levels by 70-90% in fa/fa vs lean rat liver, which was inhibited by the NADPH oxidase inhibitor gp91(ds-tat) (50 microM) and G6PD inhibitors 6-aminonicotinamide (1 mM) and dehydroepiandrosterone (100 microM), therefore indicating that elevated G6PD activity may be responsible for mediating superoxide generation.
388 19230846 Increased G6PD and NADPH oxidase expression and activity, in young hyperglycemic and hyperinsulinemic rats before the development of diabetes, seems to be a contributing factor in the induction of oxidative stress.
389 19272022 Growth factor or insulin stimulation induces a canonical cascade resulting in the transient phosphorylation of PtdIns(4,5)P(2) by PI3K (phosphoinositide 3-kinase) to form PtdIns(3,4,5)P(3), which is rapidly dephosphorylated either by PTEN (phosphatase and tensin homologue deleted on chromosome 10) back to PtdIns(4,5)P(2), or by the 5-ptases (inositol polyphosphate 5-phosphatases), generating PtdIns(3,4)P(2).
390 19272022 Futhermore, the 5-ptases SHIP [SH2 (Src homology 2)-domain-containing inositol phosphatase] 2, SKIP (skeletal muscle- and kidney-enriched inositol phosphatase) and 72-5ptase (72 kDa 5-ptase)/Type IV/Inpp5e (inositol polyphosphate 5-phosphatase E) are implicated in negatively regulating insulin signalling and glucose homoeostasis in specific tissues.
391 19272022 SHIP2 polymorphisms are associated with a predisposition to insulin resistance.
392 19272022 In addition, 5-ptases such as SHIP1, SHIP2 and 72-5ptase/Type IV/Inpp5e regulate macrophage phagocytosis, and SHIP1 also controls haemopoietic cell proliferation.
393 19423845 C-reactive protein inhibits insulin activation of endothelial nitric oxide synthase via the immunoreceptor tyrosine-based inhibition motif of FcgammaRIIB and SHIP-1.
394 19423845 Insulin promotes the cardiovascular protective functions of the endothelium including NO production by endothelial NO synthase (eNOS), which it stimulates via Akt kinase which phosphorylates eNOS Ser1179.
395 19423845 We previously showed that CRP inhibits eNOS activation by insulin by blunting Ser1179 phosphorylation.
396 19423845 We first show in mice that CRP inhibits insulin-induced eNOS phosphorylation, indicating that these processes are operative in vivo.
397 19423845 In endothelial cells we find that CRP attenuates insulin-induced Akt phosphorylation, and CRP antagonism of eNOS is negated by expression of constitutively active Akt; the inhibitory effect of CRP on Akt is also observed in vivo.
398 19423845 Furthermore, we find that endothelium express SHIP-1 (Src homology 2 domain-containing inositol 5'-phosphatase 1), that CRP induces SHIP-1 stimulatory phosphorylation in endothelium in culture and in vivo, and that SHIP-1 knockdown by small interfering RNA prevents CRP antagonism of insulin-induced eNOS activation.
399 19423845 Thus, CRP inhibits eNOS stimulation by insulin via FcgammaRIIB and its ITIM, SHIP-1 activation, and resulting blunted activation of Akt.
400 19423845 These findings provide mechanistic linkage among CRP, impaired insulin signaling in endothelium, and greater cardiovascular disease risk in type 2 diabetes.
401 19455054 The level of cytochrome c expression and caspase 3 activation was also reduced.
402 19455054 BHE elevated antiapoptotic proteins Bcl-2 and heme oxygenase-1 and stimulated the phosphorylation of survival protein Akt simultaneously decreasing the apoptotic proteins Bax and Src.
403 19455054 In addition, BHE enhanced the protein expression of peroxisome proliferator-activated receptor-gamma, peroxisome proliferator-activated receptor-delta, and Glut-4, probably revealing the antiobese and antidiabetic potential of BHE.
404 19926790 We describe widely applicable, calibrated Förster resonance energy transfer methods that quantify structural and biochemical parameters for interaction of the human estrogen receptor alpha-isoform (ER alpha) with the receptor interacting domains (RIDs) of three cofactors (SRC1, SRC2, SRC3) in living cells.
405 20029537 Role of insulin-like growth factor 1 receptor and c-Src in endothelin-1- and angiotensin II-induced PKB phosphorylation, and hypertrophic and proliferative responses in vascular smooth muscle cells.
406 20029537 Endothelin-1 (ET-1) and angiotensin II (Ang II) are vasoactive peptides believed to contribute to the pathogenesis of vascular abnormalities such as hypertension, atherosclerosis, hypertrophy, and restenosis.
407 20029537 We have demonstrated that insulin-like growth factor type 1 receptor (IGF-1R) plays a role in transducing the effect of H2O2, leading to protein kinase B (PKB) phosphorylation.
408 20029537 Since vasoactive peptides elicit their responses through generation of reactive oxygen species, including H2O2, we investigated whether IGF-1R transactivation plays a similar role in ET-1- and Ang II-induced PKB phosphorylation and hypertrophic responses in vascular smooth muscle cells (VSMC).
409 20029537 AG1024, a specific inhibitor of IGF-1R protein tyrosine kinase (PTK), attenuated both ET-1- and Ang II-induced PKB phosphorylation in a dose-dependent manner.
410 20029537 ET-1 and Ang II treatment also induced the phosphorylation of tyrosine residues in the autophosphorylation sites of IGF-1R, which were blocked by AG1024.
411 20029537 In addition, both ET-1 and Ang II evoked tyrosine phosphorylation of c-Src, a nonreceptor PTK, whereas pharmacological inhibition of c-Src PTK activity by PP2, a specific inhibitor of Src-family tyrosine kinase, significantly reduced PKB phosphorylation as well as tyrosine phosphorylation of IGF-1R induced by the 2 vasoactive peptides.
412 20029537 Furthermore, protein and DNA synthesis enhanced by ET-1 and Ang II were attenuated by AG1024 and PP2.
413 20029537 In conclusion, these data suggest that IGF-1R PTK and c-Src PTK play a critical role in mediating PKB phosphorylation as well as hypertrophic and proliferative responses induced by ET-1 and Ang II in A10 VSMC.
414 20029537 Role of insulin-like growth factor 1 receptor and c-Src in endothelin-1- and angiotensin II-induced PKB phosphorylation, and hypertrophic and proliferative responses in vascular smooth muscle cells.
415 20029537 Endothelin-1 (ET-1) and angiotensin II (Ang II) are vasoactive peptides believed to contribute to the pathogenesis of vascular abnormalities such as hypertension, atherosclerosis, hypertrophy, and restenosis.
416 20029537 We have demonstrated that insulin-like growth factor type 1 receptor (IGF-1R) plays a role in transducing the effect of H2O2, leading to protein kinase B (PKB) phosphorylation.
417 20029537 Since vasoactive peptides elicit their responses through generation of reactive oxygen species, including H2O2, we investigated whether IGF-1R transactivation plays a similar role in ET-1- and Ang II-induced PKB phosphorylation and hypertrophic responses in vascular smooth muscle cells (VSMC).
418 20029537 AG1024, a specific inhibitor of IGF-1R protein tyrosine kinase (PTK), attenuated both ET-1- and Ang II-induced PKB phosphorylation in a dose-dependent manner.
419 20029537 ET-1 and Ang II treatment also induced the phosphorylation of tyrosine residues in the autophosphorylation sites of IGF-1R, which were blocked by AG1024.
420 20029537 In addition, both ET-1 and Ang II evoked tyrosine phosphorylation of c-Src, a nonreceptor PTK, whereas pharmacological inhibition of c-Src PTK activity by PP2, a specific inhibitor of Src-family tyrosine kinase, significantly reduced PKB phosphorylation as well as tyrosine phosphorylation of IGF-1R induced by the 2 vasoactive peptides.
421 20029537 Furthermore, protein and DNA synthesis enhanced by ET-1 and Ang II were attenuated by AG1024 and PP2.
422 20029537 In conclusion, these data suggest that IGF-1R PTK and c-Src PTK play a critical role in mediating PKB phosphorylation as well as hypertrophic and proliferative responses induced by ET-1 and Ang II in A10 VSMC.
423 20029537 Role of insulin-like growth factor 1 receptor and c-Src in endothelin-1- and angiotensin II-induced PKB phosphorylation, and hypertrophic and proliferative responses in vascular smooth muscle cells.
424 20029537 Endothelin-1 (ET-1) and angiotensin II (Ang II) are vasoactive peptides believed to contribute to the pathogenesis of vascular abnormalities such as hypertension, atherosclerosis, hypertrophy, and restenosis.
425 20029537 We have demonstrated that insulin-like growth factor type 1 receptor (IGF-1R) plays a role in transducing the effect of H2O2, leading to protein kinase B (PKB) phosphorylation.
426 20029537 Since vasoactive peptides elicit their responses through generation of reactive oxygen species, including H2O2, we investigated whether IGF-1R transactivation plays a similar role in ET-1- and Ang II-induced PKB phosphorylation and hypertrophic responses in vascular smooth muscle cells (VSMC).
427 20029537 AG1024, a specific inhibitor of IGF-1R protein tyrosine kinase (PTK), attenuated both ET-1- and Ang II-induced PKB phosphorylation in a dose-dependent manner.
428 20029537 ET-1 and Ang II treatment also induced the phosphorylation of tyrosine residues in the autophosphorylation sites of IGF-1R, which were blocked by AG1024.
429 20029537 In addition, both ET-1 and Ang II evoked tyrosine phosphorylation of c-Src, a nonreceptor PTK, whereas pharmacological inhibition of c-Src PTK activity by PP2, a specific inhibitor of Src-family tyrosine kinase, significantly reduced PKB phosphorylation as well as tyrosine phosphorylation of IGF-1R induced by the 2 vasoactive peptides.
430 20029537 Furthermore, protein and DNA synthesis enhanced by ET-1 and Ang II were attenuated by AG1024 and PP2.
431 20029537 In conclusion, these data suggest that IGF-1R PTK and c-Src PTK play a critical role in mediating PKB phosphorylation as well as hypertrophic and proliferative responses induced by ET-1 and Ang II in A10 VSMC.
432 20182516 Functional recovery of diabetic mouse hearts by glutaredoxin-1 gene therapy: role of Akt-FoxO-signaling network.
433 20182516 In concert, Glrx-1 prevented diabetes and ischemia-reperfusion induced reduction of cardioprotective proteins including Akt, FoxO-1, and hemeoxygenase-1, and abolished the death signal triggered by Jnk, p38 mitogen-activated protein kinase, and c-Src.
434 20232313 Mesenchymal transition and concomitant losses in insulin gene expression observed on C-IV were found to be dependent on beta(1)-integrin ligation and were augmented in the presence of hepatocyte growth factor.
435 20232313 Importantly, selective inhibition of c-Src, c-Jun N-terminal kinase (JNK), and extracellular signal-regulated kinase (ERK) prior to exposure to C-IV prevented mesenchymal transition and effectively preserved insulin expression.
436 20232313 Inhibition of Src-, ERK-, or JNK-dependent signaling combined with the selective regulation of matrix exposure may ultimately facilitate the development of more effective beta-cell expansion protocols.
437 20555420 Involvement of insulin-like growth factor 1 receptor transactivation in endothelin-1-induced signaling in vascular smooth muscle cells.
438 20555420 However, recent studies have implicated insulin-like growth factor 1 receptor transactivation in this process.
439 20555420 In this review, we will examine the contribution of both insulin-like growth factor 1 receptor and c-Src in mediating ET-1-induced signaling responses in vascular smooth muscle cells.
440 21506908 p66Shc, a 66 kDa proto-oncogene Src collagen homologue (Shc) adaptor protein, is classically known as a signalling protein implicated in receptor tyrosine kinase signal transduction.
441 21638209 TGF-β1 → SMAD/p53/USF2 → PAI-1 transcriptional axis in ureteral obstruction-induced renal fibrosis.
442 21638209 SMAD and non-SMAD pathways (pp60(c-src), epidermal growth factor receptor [EGFR], mitogen-activated protein kinase, p53) are required for PAI-1 induction by TGF-β1.
443 21638209 SMAD2/3, pp60(c-src), EGFR, and p53 activation are each increased in the obstructed kidney.
444 21638209 TGF-β1 → SMAD/p53/USF2 → PAI-1 transcriptional axis in ureteral obstruction-induced renal fibrosis.
445 21638209 SMAD and non-SMAD pathways (pp60(c-src), epidermal growth factor receptor [EGFR], mitogen-activated protein kinase, p53) are required for PAI-1 induction by TGF-β1.
446 21638209 SMAD2/3, pp60(c-src), EGFR, and p53 activation are each increased in the obstructed kidney.
447 21810446 Particular attention was paid to cholecystokinin (CCK), a physiological regulator of pancreatic function and important in pathological processes affecting acinar function, like pancreatitis.
448 21810446 PKCθ was activated in time- and dose-related manner by CCK, mediated 30% by high-affinity CCK(A)-receptor activation.
449 21810446 PKCθ inhibition (by pseudostrate-inhibitor or dominant negative) inhibited CCK- and TPA-stimulation of PKD, Src, RafC, PYK2, p125(FAK) and IKKα/β, but not basal/stimulated enzyme secretion.
450 21810446 Also CCK- and TPA-induced PKCθ activation produced an increment in PKCθ's direct association with AKT, RafA, RafC and Lyn.
451 21926342 Losartan improves aortic endothelium-dependent relaxation via proline-rich tyrosine kinase 2/Src/Akt pathway in type 2 diabetic Goto-Kakizaki rats.
452 21926342 We hypothesized that insulin-induced relaxation and the associated proline-rich tyrosine kinase 2 (Pyk2)/Src/Akt pathway would be abnormal in aortas from the Goto-Kakizaki (GK) type 2 diabetic rat, which exhibits hyperglycemia/insulin resistance, and that losartan treatment of such rats (25 mg·kg(-1)·day(-1) for 2 wk) would correct these abnormalities.
453 21926342 Pyk2, Src, and Akt/endothelial nitric oxide synthase (eNOS) signaling-pathway protein levels and activities were assayed mainly by Western blotting and partly by immunohistochemistry.
454 21926342 In GK (vs. age-matched control) aortas, various insulin-stimulated levels [nitric oxide production and the phosphorylations of eNOS at Ser(1177), of Akt at Thr(308), of phosphoinositide-dependent kinase-1 (PDK1) at Ser(241), of Src at Tyr(416), and of Pyk2 at Tyr(579)] were all significantly decreased and unaffected by either Src inhibitor (PP2) or Pyk2 inhibitor (AG17), while the insulin-stimulated levels of insulin receptor substrate (IRS)-1 phosphorylation at Ser(307), total-eNOS, and total-Akt were significantly increased.
455 21926342 The insulin-stimulated phosphorylation levels of Src/PDK1/Akt/eNOS, but not of Pyk2, were decreased by PP2 in control and losartan-treated GK, but not in GK, aortas.
456 21926342 These results suggest that in the GK diabetic aorta increased phospho-IRS-1 (at Ser(307)) and decreased Pyk2/Src activity inhibit insulin-induced stimulation of the PDK/Akt/eNOS pathway.
457 21926342 Losartan improves aortic endothelium-dependent relaxation via proline-rich tyrosine kinase 2/Src/Akt pathway in type 2 diabetic Goto-Kakizaki rats.
458 21926342 We hypothesized that insulin-induced relaxation and the associated proline-rich tyrosine kinase 2 (Pyk2)/Src/Akt pathway would be abnormal in aortas from the Goto-Kakizaki (GK) type 2 diabetic rat, which exhibits hyperglycemia/insulin resistance, and that losartan treatment of such rats (25 mg·kg(-1)·day(-1) for 2 wk) would correct these abnormalities.
459 21926342 Pyk2, Src, and Akt/endothelial nitric oxide synthase (eNOS) signaling-pathway protein levels and activities were assayed mainly by Western blotting and partly by immunohistochemistry.
460 21926342 In GK (vs. age-matched control) aortas, various insulin-stimulated levels [nitric oxide production and the phosphorylations of eNOS at Ser(1177), of Akt at Thr(308), of phosphoinositide-dependent kinase-1 (PDK1) at Ser(241), of Src at Tyr(416), and of Pyk2 at Tyr(579)] were all significantly decreased and unaffected by either Src inhibitor (PP2) or Pyk2 inhibitor (AG17), while the insulin-stimulated levels of insulin receptor substrate (IRS)-1 phosphorylation at Ser(307), total-eNOS, and total-Akt were significantly increased.
461 21926342 The insulin-stimulated phosphorylation levels of Src/PDK1/Akt/eNOS, but not of Pyk2, were decreased by PP2 in control and losartan-treated GK, but not in GK, aortas.
462 21926342 These results suggest that in the GK diabetic aorta increased phospho-IRS-1 (at Ser(307)) and decreased Pyk2/Src activity inhibit insulin-induced stimulation of the PDK/Akt/eNOS pathway.
463 21926342 Losartan improves aortic endothelium-dependent relaxation via proline-rich tyrosine kinase 2/Src/Akt pathway in type 2 diabetic Goto-Kakizaki rats.
464 21926342 We hypothesized that insulin-induced relaxation and the associated proline-rich tyrosine kinase 2 (Pyk2)/Src/Akt pathway would be abnormal in aortas from the Goto-Kakizaki (GK) type 2 diabetic rat, which exhibits hyperglycemia/insulin resistance, and that losartan treatment of such rats (25 mg·kg(-1)·day(-1) for 2 wk) would correct these abnormalities.
465 21926342 Pyk2, Src, and Akt/endothelial nitric oxide synthase (eNOS) signaling-pathway protein levels and activities were assayed mainly by Western blotting and partly by immunohistochemistry.
466 21926342 In GK (vs. age-matched control) aortas, various insulin-stimulated levels [nitric oxide production and the phosphorylations of eNOS at Ser(1177), of Akt at Thr(308), of phosphoinositide-dependent kinase-1 (PDK1) at Ser(241), of Src at Tyr(416), and of Pyk2 at Tyr(579)] were all significantly decreased and unaffected by either Src inhibitor (PP2) or Pyk2 inhibitor (AG17), while the insulin-stimulated levels of insulin receptor substrate (IRS)-1 phosphorylation at Ser(307), total-eNOS, and total-Akt were significantly increased.
467 21926342 The insulin-stimulated phosphorylation levels of Src/PDK1/Akt/eNOS, but not of Pyk2, were decreased by PP2 in control and losartan-treated GK, but not in GK, aortas.
468 21926342 These results suggest that in the GK diabetic aorta increased phospho-IRS-1 (at Ser(307)) and decreased Pyk2/Src activity inhibit insulin-induced stimulation of the PDK/Akt/eNOS pathway.
469 21926342 Losartan improves aortic endothelium-dependent relaxation via proline-rich tyrosine kinase 2/Src/Akt pathway in type 2 diabetic Goto-Kakizaki rats.
470 21926342 We hypothesized that insulin-induced relaxation and the associated proline-rich tyrosine kinase 2 (Pyk2)/Src/Akt pathway would be abnormal in aortas from the Goto-Kakizaki (GK) type 2 diabetic rat, which exhibits hyperglycemia/insulin resistance, and that losartan treatment of such rats (25 mg·kg(-1)·day(-1) for 2 wk) would correct these abnormalities.
471 21926342 Pyk2, Src, and Akt/endothelial nitric oxide synthase (eNOS) signaling-pathway protein levels and activities were assayed mainly by Western blotting and partly by immunohistochemistry.
472 21926342 In GK (vs. age-matched control) aortas, various insulin-stimulated levels [nitric oxide production and the phosphorylations of eNOS at Ser(1177), of Akt at Thr(308), of phosphoinositide-dependent kinase-1 (PDK1) at Ser(241), of Src at Tyr(416), and of Pyk2 at Tyr(579)] were all significantly decreased and unaffected by either Src inhibitor (PP2) or Pyk2 inhibitor (AG17), while the insulin-stimulated levels of insulin receptor substrate (IRS)-1 phosphorylation at Ser(307), total-eNOS, and total-Akt were significantly increased.
473 21926342 The insulin-stimulated phosphorylation levels of Src/PDK1/Akt/eNOS, but not of Pyk2, were decreased by PP2 in control and losartan-treated GK, but not in GK, aortas.
474 21926342 These results suggest that in the GK diabetic aorta increased phospho-IRS-1 (at Ser(307)) and decreased Pyk2/Src activity inhibit insulin-induced stimulation of the PDK/Akt/eNOS pathway.
475 21926342 Losartan improves aortic endothelium-dependent relaxation via proline-rich tyrosine kinase 2/Src/Akt pathway in type 2 diabetic Goto-Kakizaki rats.
476 21926342 We hypothesized that insulin-induced relaxation and the associated proline-rich tyrosine kinase 2 (Pyk2)/Src/Akt pathway would be abnormal in aortas from the Goto-Kakizaki (GK) type 2 diabetic rat, which exhibits hyperglycemia/insulin resistance, and that losartan treatment of such rats (25 mg·kg(-1)·day(-1) for 2 wk) would correct these abnormalities.
477 21926342 Pyk2, Src, and Akt/endothelial nitric oxide synthase (eNOS) signaling-pathway protein levels and activities were assayed mainly by Western blotting and partly by immunohistochemistry.
478 21926342 In GK (vs. age-matched control) aortas, various insulin-stimulated levels [nitric oxide production and the phosphorylations of eNOS at Ser(1177), of Akt at Thr(308), of phosphoinositide-dependent kinase-1 (PDK1) at Ser(241), of Src at Tyr(416), and of Pyk2 at Tyr(579)] were all significantly decreased and unaffected by either Src inhibitor (PP2) or Pyk2 inhibitor (AG17), while the insulin-stimulated levels of insulin receptor substrate (IRS)-1 phosphorylation at Ser(307), total-eNOS, and total-Akt were significantly increased.
479 21926342 The insulin-stimulated phosphorylation levels of Src/PDK1/Akt/eNOS, but not of Pyk2, were decreased by PP2 in control and losartan-treated GK, but not in GK, aortas.
480 21926342 These results suggest that in the GK diabetic aorta increased phospho-IRS-1 (at Ser(307)) and decreased Pyk2/Src activity inhibit insulin-induced stimulation of the PDK/Akt/eNOS pathway.
481 21966580 These include phosphorylation/arrestin-dependent activation of protein kinase D1, Src family kinase-dependent activation of the sodium channel NALCN and the involvement of regulator of G protein signaling (RGS)-4.
482 22148072 Hyperglycemia enhances IGF-I-stimulated Src activation via increasing Nox4-derived reactive oxygen species in a PKCζ-dependent manner in vascular smooth muscle cells.
483 22148072 The aim of the current study was to determine the mechanism by which hyperglycemia enhances IGF-I-stimulated Src activation and the role of NADPH oxidase 4 (Nox4) and protein kinase C ζ (PKCζ) in mediating this response in vascular smooth muscle cells (VSMCs).
484 22148072 The role of Nox4-derived reactive oxygen species (ROS) in IGF-I-stimulated Src activation was investigated via knockdown of Nox4.
485 22148072 Hyperglycemia induced Nox4, but not Nox1, and p22 phagocyte oxidase (p22phox) expression and IGF-I stimulated Nox4/p22phox complex formation, leading to increased ROS generation.
486 22148072 Knockdown of Nox4 prevented ROS generation and impaired the oxidation and activation of Src in response to IGF-I, whereas knockdown of Nox1 had no effect.
487 22148072 Nox4-derived ROS is responsible for the enhancing effect of hyperglycemia on IGF-I-stimulated Src activation, which in turn amplifies IGF-I-linked downstream signaling and biological actions.
488 22148072 Hyperglycemia enhances IGF-I-stimulated Src activation via increasing Nox4-derived reactive oxygen species in a PKCζ-dependent manner in vascular smooth muscle cells.
489 22148072 The aim of the current study was to determine the mechanism by which hyperglycemia enhances IGF-I-stimulated Src activation and the role of NADPH oxidase 4 (Nox4) and protein kinase C ζ (PKCζ) in mediating this response in vascular smooth muscle cells (VSMCs).
490 22148072 The role of Nox4-derived reactive oxygen species (ROS) in IGF-I-stimulated Src activation was investigated via knockdown of Nox4.
491 22148072 Hyperglycemia induced Nox4, but not Nox1, and p22 phagocyte oxidase (p22phox) expression and IGF-I stimulated Nox4/p22phox complex formation, leading to increased ROS generation.
492 22148072 Knockdown of Nox4 prevented ROS generation and impaired the oxidation and activation of Src in response to IGF-I, whereas knockdown of Nox1 had no effect.
493 22148072 Nox4-derived ROS is responsible for the enhancing effect of hyperglycemia on IGF-I-stimulated Src activation, which in turn amplifies IGF-I-linked downstream signaling and biological actions.
494 22148072 Hyperglycemia enhances IGF-I-stimulated Src activation via increasing Nox4-derived reactive oxygen species in a PKCζ-dependent manner in vascular smooth muscle cells.
495 22148072 The aim of the current study was to determine the mechanism by which hyperglycemia enhances IGF-I-stimulated Src activation and the role of NADPH oxidase 4 (Nox4) and protein kinase C ζ (PKCζ) in mediating this response in vascular smooth muscle cells (VSMCs).
496 22148072 The role of Nox4-derived reactive oxygen species (ROS) in IGF-I-stimulated Src activation was investigated via knockdown of Nox4.
497 22148072 Hyperglycemia induced Nox4, but not Nox1, and p22 phagocyte oxidase (p22phox) expression and IGF-I stimulated Nox4/p22phox complex formation, leading to increased ROS generation.
498 22148072 Knockdown of Nox4 prevented ROS generation and impaired the oxidation and activation of Src in response to IGF-I, whereas knockdown of Nox1 had no effect.
499 22148072 Nox4-derived ROS is responsible for the enhancing effect of hyperglycemia on IGF-I-stimulated Src activation, which in turn amplifies IGF-I-linked downstream signaling and biological actions.
500 22148072 Hyperglycemia enhances IGF-I-stimulated Src activation via increasing Nox4-derived reactive oxygen species in a PKCζ-dependent manner in vascular smooth muscle cells.
501 22148072 The aim of the current study was to determine the mechanism by which hyperglycemia enhances IGF-I-stimulated Src activation and the role of NADPH oxidase 4 (Nox4) and protein kinase C ζ (PKCζ) in mediating this response in vascular smooth muscle cells (VSMCs).
502 22148072 The role of Nox4-derived reactive oxygen species (ROS) in IGF-I-stimulated Src activation was investigated via knockdown of Nox4.
503 22148072 Hyperglycemia induced Nox4, but not Nox1, and p22 phagocyte oxidase (p22phox) expression and IGF-I stimulated Nox4/p22phox complex formation, leading to increased ROS generation.
504 22148072 Knockdown of Nox4 prevented ROS generation and impaired the oxidation and activation of Src in response to IGF-I, whereas knockdown of Nox1 had no effect.
505 22148072 Nox4-derived ROS is responsible for the enhancing effect of hyperglycemia on IGF-I-stimulated Src activation, which in turn amplifies IGF-I-linked downstream signaling and biological actions.
506 22148072 Hyperglycemia enhances IGF-I-stimulated Src activation via increasing Nox4-derived reactive oxygen species in a PKCζ-dependent manner in vascular smooth muscle cells.
507 22148072 The aim of the current study was to determine the mechanism by which hyperglycemia enhances IGF-I-stimulated Src activation and the role of NADPH oxidase 4 (Nox4) and protein kinase C ζ (PKCζ) in mediating this response in vascular smooth muscle cells (VSMCs).
508 22148072 The role of Nox4-derived reactive oxygen species (ROS) in IGF-I-stimulated Src activation was investigated via knockdown of Nox4.
509 22148072 Hyperglycemia induced Nox4, but not Nox1, and p22 phagocyte oxidase (p22phox) expression and IGF-I stimulated Nox4/p22phox complex formation, leading to increased ROS generation.
510 22148072 Knockdown of Nox4 prevented ROS generation and impaired the oxidation and activation of Src in response to IGF-I, whereas knockdown of Nox1 had no effect.
511 22148072 Nox4-derived ROS is responsible for the enhancing effect of hyperglycemia on IGF-I-stimulated Src activation, which in turn amplifies IGF-I-linked downstream signaling and biological actions.
512 22403298 Increased VEGF-dependent angiogenic function in BMECs is mediated by peroxynitrite and involves c-src and MT1-MMP activation.
513 22426112 LYP inhibits T-cell activation when dissociated from CSK.
514 22426112 Lymphoid tyrosine phosphatase (LYP) and C-terminal Src kinase (CSK) are negative regulators of signaling mediated through the T-cell antigen receptor (TCR) and are thought to act in a cooperative manner when forming a complex.
515 22426112 Development of a potent and selective chemical probe of LYP confirmed that LYP inhibits T-cell activation when removed from CSK.
516 22426112 Our findings may explain the reduced TCR-mediated signaling associated with a single-nucleotide polymorphism that confers increased risk for certain autoimmune diseases, including type 1 diabetes and rheumatoid arthritis, and results in expression of a mutant LYP that is unable to bind CSK.
517 22886693 Endothelial hyperpermeability is increased by actomyosin contractile activity in response to phosphorylation of myosin light chain by myosin light chain kinase (MLCK).
518 22886693 MLCK-dependent endothelial hyperpermeability occurs in response to inflammatory mediators (e.g., activated neutrophils, thrombin, histamine, tumor necrosis factor alpha, etc.), through multiple cell signaling pathways and signaling molecules (e.g., Ca(++) , protein kinase C, Src kinase, nitric oxide synthase, etc.).
519 22927051 B. pseudomallei-induced NET formation required NADPH oxidase activation but not phosphatidylinositol-3 kinase, mitogen-activated protein kinases, or Src family kinase signaling pathways.
520 22939843 β-Arrestin1-mediated recruitment of c-Src underlies the proliferative action of glucagon-like peptide-1 in pancreatic β INS832/13 cells.
521 22939843 In the present study, we sought to test the hypothesis that β-arrestin-mediated recruitment of c-Src underlies the proliferative action of GLP-1 in β-cells.
522 22939843 Our results show that GLP-1 increased c-Src phosphorylation in INS832/13 cells, an effect inhibited by siRNA-mediated β-arrestin1 knockdown.
523 22939843 Co-immunoprecipitation experiments showed a physical association between c-Src and both β-arrestin1 and GLP-1R upon GLP-1 treatment.
524 22939843 We propose that the formation of a signaling complex comprising the agonist-stimulated GLP-1R, β-arrestin1 and c-Src is required for the action of GLP-1 on β-cell mass.
525 22939843 β-Arrestin1-mediated recruitment of c-Src underlies the proliferative action of glucagon-like peptide-1 in pancreatic β INS832/13 cells.
526 22939843 In the present study, we sought to test the hypothesis that β-arrestin-mediated recruitment of c-Src underlies the proliferative action of GLP-1 in β-cells.
527 22939843 Our results show that GLP-1 increased c-Src phosphorylation in INS832/13 cells, an effect inhibited by siRNA-mediated β-arrestin1 knockdown.
528 22939843 Co-immunoprecipitation experiments showed a physical association between c-Src and both β-arrestin1 and GLP-1R upon GLP-1 treatment.
529 22939843 We propose that the formation of a signaling complex comprising the agonist-stimulated GLP-1R, β-arrestin1 and c-Src is required for the action of GLP-1 on β-cell mass.
530 22939843 β-Arrestin1-mediated recruitment of c-Src underlies the proliferative action of glucagon-like peptide-1 in pancreatic β INS832/13 cells.
531 22939843 In the present study, we sought to test the hypothesis that β-arrestin-mediated recruitment of c-Src underlies the proliferative action of GLP-1 in β-cells.
532 22939843 Our results show that GLP-1 increased c-Src phosphorylation in INS832/13 cells, an effect inhibited by siRNA-mediated β-arrestin1 knockdown.
533 22939843 Co-immunoprecipitation experiments showed a physical association between c-Src and both β-arrestin1 and GLP-1R upon GLP-1 treatment.
534 22939843 We propose that the formation of a signaling complex comprising the agonist-stimulated GLP-1R, β-arrestin1 and c-Src is required for the action of GLP-1 on β-cell mass.
535 22939843 β-Arrestin1-mediated recruitment of c-Src underlies the proliferative action of glucagon-like peptide-1 in pancreatic β INS832/13 cells.
536 22939843 In the present study, we sought to test the hypothesis that β-arrestin-mediated recruitment of c-Src underlies the proliferative action of GLP-1 in β-cells.
537 22939843 Our results show that GLP-1 increased c-Src phosphorylation in INS832/13 cells, an effect inhibited by siRNA-mediated β-arrestin1 knockdown.
538 22939843 Co-immunoprecipitation experiments showed a physical association between c-Src and both β-arrestin1 and GLP-1R upon GLP-1 treatment.
539 22939843 We propose that the formation of a signaling complex comprising the agonist-stimulated GLP-1R, β-arrestin1 and c-Src is required for the action of GLP-1 on β-cell mass.
540 22939843 β-Arrestin1-mediated recruitment of c-Src underlies the proliferative action of glucagon-like peptide-1 in pancreatic β INS832/13 cells.
541 22939843 In the present study, we sought to test the hypothesis that β-arrestin-mediated recruitment of c-Src underlies the proliferative action of GLP-1 in β-cells.
542 22939843 Our results show that GLP-1 increased c-Src phosphorylation in INS832/13 cells, an effect inhibited by siRNA-mediated β-arrestin1 knockdown.
543 22939843 Co-immunoprecipitation experiments showed a physical association between c-Src and both β-arrestin1 and GLP-1R upon GLP-1 treatment.
544 22939843 We propose that the formation of a signaling complex comprising the agonist-stimulated GLP-1R, β-arrestin1 and c-Src is required for the action of GLP-1 on β-cell mass.
545 22982565 Amurensin G enhanced the activities of phosphatidylinositol 3-kinase (PI3K) and Src and their chemical inhibitors suppressed amurensin G-stimulated eNOS phosphorylation.
546 22982565 Moreover, amurensin G activated AMP-activated protein kinase (AMPK), and amurensin G-stimulated eNOS phosphorylation and PI3K activation were reversed by AMPK inhibition.
547 22982565 ER inhibition reversed AMPK-dependent PI3K activation in response to amurensin G.
548 22982565 Amurensin G-mediated endothelium-dependent relaxation was blocked by inhibition of AMPK, ER, Src, or PI3K.
549 22982565 These results suggest that amurensin G enhances NO production via eNOS phosphorylation in endothelial cells, and ER-dependent AMPK/PI3K pathways are required.
550 22982565 Amurensin G enhanced the activities of phosphatidylinositol 3-kinase (PI3K) and Src and their chemical inhibitors suppressed amurensin G-stimulated eNOS phosphorylation.
551 22982565 Moreover, amurensin G activated AMP-activated protein kinase (AMPK), and amurensin G-stimulated eNOS phosphorylation and PI3K activation were reversed by AMPK inhibition.
552 22982565 ER inhibition reversed AMPK-dependent PI3K activation in response to amurensin G.
553 22982565 Amurensin G-mediated endothelium-dependent relaxation was blocked by inhibition of AMPK, ER, Src, or PI3K.
554 22982565 These results suggest that amurensin G enhances NO production via eNOS phosphorylation in endothelial cells, and ER-dependent AMPK/PI3K pathways are required.
555 23364683 The in vitro assay showed that HPN exhibited enhanced inhibitory activity against PTP1B with IC(50) 0.63 μmol/L and high selectivity against other PTPs (T cell protein tyrosine phosphatase (TCPTP), leucocyte antigen-related tyrosine phosphatase (LAR), Src homology 2-containing protein tyrosine phosphatase-1 (SHP-1) and SHP-2).
556 23364683 Western blotting results showed that HPN decreased PTP1B levels in pancreatic tissue.
557 23404499 In investigating the associated mechanisms, we found that leucine itself does not activate the classical Akt- or ERK1/2 MAP kinase-dependent signaling pathways but can facilitate the insulin-induced phosphorylations of Akt(473) and ERK1/2 in a time- and dose-dependent manner in cultured hepatocytes.
558 23404499 The leucine-facilitated insulin-induced phosphorylation of Akt at residue 473 was not affected by knocking down the key component of mTORC1 or -2 complexes but was blocked by inhibition of c-Src (PP2), PI3K (LY294002), Gαi protein (pertussis toxin or siRNA against Gαi1 gene, or β-arrestin 2 (siRNA)).
559 23404499 Similarly, the leucine-facilitated insulin activation of ERK1/2 was also blunted by pertussis toxin.
560 23472139 Activation of Akt by advanced glycation end products (AGEs): involvement of IGF-1 receptor and caveolin-1.
561 23472139 AGEs activate signaling proteins such as Src, Akt and ERK1/2.
562 23472139 The AGEs-stimulated Akt activation was blocked by a PI3-kinase inhibitor LY 294002, Src inhibitor PP2, an antioxidant NAC, superoxide scavenger Tiron, or nicotinamide adenine dinucleotide phosphate (NAD(P)H) oxidase inhibitor DPI, suggesting the involvement of Src and NAD(P)H oxidase in the activation of PI3-kinase-Akt pathway by AGEs.
563 23472139 The AGEs-stimulated Akt activity was sensitive to Insulin-like growth factor 1 receptor (IGF-1R) kinase inhibitor AG1024.
564 23472139 Furthermore, AGEs induced phosphorylation of IGF-1 receptorβsubunit (IGF-1Rβ) on Tyr1135/1136, which was sensitive to PP2, indicating that AGEs stimulate Akt activity by transactivating IGF-1 receptor.
565 23472139 In addition, the AGEs-stimulated Akt activation was attenuated by β-methylcyclodextrin that abolishes the structure of caveolae, and by lowering caveolin-1 (Cav-1) levels with siRNAs.
566 23472139 Furthermore, addition of AGEs enhanced the interaction of phospho-Cav-1 with IGF-1Rβ and transfection of 3T3-L1 cells with Cav-1 Y14F mutants inhibited the activation of Akt by AGEs.
567 23472139 These results suggest that AGEs activate NAD(P)H oxidase and Src which in turn phosphorylates IGF-1 receptor and Cav-1 leading to activation of IGF-1 receptor and the downstream Akt in 3T3-L1 cells.
568 23472139 AGEs treatment promoted the differentiation of 3T3-L1 preadipocytes and addition of AG1024, LY 294002 or Akt inhibitor attenuated the promoting effect of AGEs on adipogenesis, suggesting that IGF-1 receptor, PI3-Kinase and Akt are involved in the facilitation of adipogenesis by AGEs.
569 23472139 Activation of Akt by advanced glycation end products (AGEs): involvement of IGF-1 receptor and caveolin-1.
570 23472139 AGEs activate signaling proteins such as Src, Akt and ERK1/2.
571 23472139 The AGEs-stimulated Akt activation was blocked by a PI3-kinase inhibitor LY 294002, Src inhibitor PP2, an antioxidant NAC, superoxide scavenger Tiron, or nicotinamide adenine dinucleotide phosphate (NAD(P)H) oxidase inhibitor DPI, suggesting the involvement of Src and NAD(P)H oxidase in the activation of PI3-kinase-Akt pathway by AGEs.
572 23472139 The AGEs-stimulated Akt activity was sensitive to Insulin-like growth factor 1 receptor (IGF-1R) kinase inhibitor AG1024.
573 23472139 Furthermore, AGEs induced phosphorylation of IGF-1 receptorβsubunit (IGF-1Rβ) on Tyr1135/1136, which was sensitive to PP2, indicating that AGEs stimulate Akt activity by transactivating IGF-1 receptor.
574 23472139 In addition, the AGEs-stimulated Akt activation was attenuated by β-methylcyclodextrin that abolishes the structure of caveolae, and by lowering caveolin-1 (Cav-1) levels with siRNAs.
575 23472139 Furthermore, addition of AGEs enhanced the interaction of phospho-Cav-1 with IGF-1Rβ and transfection of 3T3-L1 cells with Cav-1 Y14F mutants inhibited the activation of Akt by AGEs.
576 23472139 These results suggest that AGEs activate NAD(P)H oxidase and Src which in turn phosphorylates IGF-1 receptor and Cav-1 leading to activation of IGF-1 receptor and the downstream Akt in 3T3-L1 cells.
577 23472139 AGEs treatment promoted the differentiation of 3T3-L1 preadipocytes and addition of AG1024, LY 294002 or Akt inhibitor attenuated the promoting effect of AGEs on adipogenesis, suggesting that IGF-1 receptor, PI3-Kinase and Akt are involved in the facilitation of adipogenesis by AGEs.
578 23472139 Activation of Akt by advanced glycation end products (AGEs): involvement of IGF-1 receptor and caveolin-1.
579 23472139 AGEs activate signaling proteins such as Src, Akt and ERK1/2.
580 23472139 The AGEs-stimulated Akt activation was blocked by a PI3-kinase inhibitor LY 294002, Src inhibitor PP2, an antioxidant NAC, superoxide scavenger Tiron, or nicotinamide adenine dinucleotide phosphate (NAD(P)H) oxidase inhibitor DPI, suggesting the involvement of Src and NAD(P)H oxidase in the activation of PI3-kinase-Akt pathway by AGEs.
581 23472139 The AGEs-stimulated Akt activity was sensitive to Insulin-like growth factor 1 receptor (IGF-1R) kinase inhibitor AG1024.
582 23472139 Furthermore, AGEs induced phosphorylation of IGF-1 receptorβsubunit (IGF-1Rβ) on Tyr1135/1136, which was sensitive to PP2, indicating that AGEs stimulate Akt activity by transactivating IGF-1 receptor.
583 23472139 In addition, the AGEs-stimulated Akt activation was attenuated by β-methylcyclodextrin that abolishes the structure of caveolae, and by lowering caveolin-1 (Cav-1) levels with siRNAs.
584 23472139 Furthermore, addition of AGEs enhanced the interaction of phospho-Cav-1 with IGF-1Rβ and transfection of 3T3-L1 cells with Cav-1 Y14F mutants inhibited the activation of Akt by AGEs.
585 23472139 These results suggest that AGEs activate NAD(P)H oxidase and Src which in turn phosphorylates IGF-1 receptor and Cav-1 leading to activation of IGF-1 receptor and the downstream Akt in 3T3-L1 cells.
586 23472139 AGEs treatment promoted the differentiation of 3T3-L1 preadipocytes and addition of AG1024, LY 294002 or Akt inhibitor attenuated the promoting effect of AGEs on adipogenesis, suggesting that IGF-1 receptor, PI3-Kinase and Akt are involved in the facilitation of adipogenesis by AGEs.
587 23526543 Next, data obtained with selective pharmacological inhibitors and small interfering RNAs (siRNAs) showed that HG-induced MMP-9 expression is mediated through a c-Src-dependent reactive oxygen species (ROS) signal linking to activation of mitogen-activated protein kinases (MAPKs).
588 23526543 Subsequently, the transcriptional factor nuclear factor-kappa B (NF-κB) was activated and thereby turned on transcription of MMP-9 gene.
589 23565109 First, regulation of cytokine-stimulated NOX-1 expression has been linked to inflammatory lipid mediators derived from 12-lipoxygenase activity.
590 23565109 Second, regulation of NOX-1 in beta cells involves feed-forward control linked to elevated ROS and Src-kinase activation.
591 23612968 Recruitment of Nox4 to a plasma membrane scaffold is required for localized reactive oxygen species generation and sustained Src activation in response to insulin-like growth factor-I.
592 23612968 Nox4-derived ROS is increased in response to hyperglycemia and is required for IGF-I-stimulated Src activation.
593 23612968 This study was undertaken to determine the mechanism by which Nox4 mediates sustained Src activation.
594 23612968 IGF-I stimulated sustained Src activation, which occurred primarily on the SHPS-1 scaffold protein.
595 23612968 In vitro oxidation experiments indicated that Nox4-derived ROS was able to oxidize Src when they are in close proximity, and Src oxidation leads to its activation.
596 23612968 Therefore we hypothesized that Nox4 recruitment to the plasma membrane scaffold SHPS-1 allowed localized ROS generation to mediate sustained Src oxidation and activation.
597 23612968 To determine the mechanism of Nox4 recruitment, we analyzed the role of Grb2, a component of the SHPS-1 signaling complex.
598 23612968 We determined that Nox4 Tyr-491 was phosphorylated after IGF-I stimulation and was responsible for Nox4 binding to the SH2 domain of Grb2.
599 23612968 Overexpression of a Nox4 mutant, Y491F, prevented Nox4/Grb2 association.
600 23612968 Importantly, it also prevented Nox4 recruitment to SHPS-1.
601 23612968 The role of Grb2 was confirmed using a Pyk2 Y881F mutant, which blocked Grb2 recruitment to SHPS-1.
602 23612968 Cells expressing this mutant had impaired Nox4 recruitment to SHPS-1.
603 23612968 IGF-I-stimulated downstream signaling and biological actions were also significantly impaired in Nox4 Y491F-overexpressing cells.
604 23612968 Disruption of Nox4 recruitment to SHPS-1 in aorta from diabetic mice inhibited IGF-I-stimulated Src oxidation and activation as well as cell proliferation.
605 23612968 Recruitment of Nox4 to a plasma membrane scaffold is required for localized reactive oxygen species generation and sustained Src activation in response to insulin-like growth factor-I.
606 23612968 Nox4-derived ROS is increased in response to hyperglycemia and is required for IGF-I-stimulated Src activation.
607 23612968 This study was undertaken to determine the mechanism by which Nox4 mediates sustained Src activation.
608 23612968 IGF-I stimulated sustained Src activation, which occurred primarily on the SHPS-1 scaffold protein.
609 23612968 In vitro oxidation experiments indicated that Nox4-derived ROS was able to oxidize Src when they are in close proximity, and Src oxidation leads to its activation.
610 23612968 Therefore we hypothesized that Nox4 recruitment to the plasma membrane scaffold SHPS-1 allowed localized ROS generation to mediate sustained Src oxidation and activation.
611 23612968 To determine the mechanism of Nox4 recruitment, we analyzed the role of Grb2, a component of the SHPS-1 signaling complex.
612 23612968 We determined that Nox4 Tyr-491 was phosphorylated after IGF-I stimulation and was responsible for Nox4 binding to the SH2 domain of Grb2.
613 23612968 Overexpression of a Nox4 mutant, Y491F, prevented Nox4/Grb2 association.
614 23612968 Importantly, it also prevented Nox4 recruitment to SHPS-1.
615 23612968 The role of Grb2 was confirmed using a Pyk2 Y881F mutant, which blocked Grb2 recruitment to SHPS-1.
616 23612968 Cells expressing this mutant had impaired Nox4 recruitment to SHPS-1.
617 23612968 IGF-I-stimulated downstream signaling and biological actions were also significantly impaired in Nox4 Y491F-overexpressing cells.
618 23612968 Disruption of Nox4 recruitment to SHPS-1 in aorta from diabetic mice inhibited IGF-I-stimulated Src oxidation and activation as well as cell proliferation.
619 23612968 Recruitment of Nox4 to a plasma membrane scaffold is required for localized reactive oxygen species generation and sustained Src activation in response to insulin-like growth factor-I.
620 23612968 Nox4-derived ROS is increased in response to hyperglycemia and is required for IGF-I-stimulated Src activation.
621 23612968 This study was undertaken to determine the mechanism by which Nox4 mediates sustained Src activation.
622 23612968 IGF-I stimulated sustained Src activation, which occurred primarily on the SHPS-1 scaffold protein.
623 23612968 In vitro oxidation experiments indicated that Nox4-derived ROS was able to oxidize Src when they are in close proximity, and Src oxidation leads to its activation.
624 23612968 Therefore we hypothesized that Nox4 recruitment to the plasma membrane scaffold SHPS-1 allowed localized ROS generation to mediate sustained Src oxidation and activation.
625 23612968 To determine the mechanism of Nox4 recruitment, we analyzed the role of Grb2, a component of the SHPS-1 signaling complex.
626 23612968 We determined that Nox4 Tyr-491 was phosphorylated after IGF-I stimulation and was responsible for Nox4 binding to the SH2 domain of Grb2.
627 23612968 Overexpression of a Nox4 mutant, Y491F, prevented Nox4/Grb2 association.
628 23612968 Importantly, it also prevented Nox4 recruitment to SHPS-1.
629 23612968 The role of Grb2 was confirmed using a Pyk2 Y881F mutant, which blocked Grb2 recruitment to SHPS-1.
630 23612968 Cells expressing this mutant had impaired Nox4 recruitment to SHPS-1.
631 23612968 IGF-I-stimulated downstream signaling and biological actions were also significantly impaired in Nox4 Y491F-overexpressing cells.
632 23612968 Disruption of Nox4 recruitment to SHPS-1 in aorta from diabetic mice inhibited IGF-I-stimulated Src oxidation and activation as well as cell proliferation.
633 23612968 Recruitment of Nox4 to a plasma membrane scaffold is required for localized reactive oxygen species generation and sustained Src activation in response to insulin-like growth factor-I.
634 23612968 Nox4-derived ROS is increased in response to hyperglycemia and is required for IGF-I-stimulated Src activation.
635 23612968 This study was undertaken to determine the mechanism by which Nox4 mediates sustained Src activation.
636 23612968 IGF-I stimulated sustained Src activation, which occurred primarily on the SHPS-1 scaffold protein.
637 23612968 In vitro oxidation experiments indicated that Nox4-derived ROS was able to oxidize Src when they are in close proximity, and Src oxidation leads to its activation.
638 23612968 Therefore we hypothesized that Nox4 recruitment to the plasma membrane scaffold SHPS-1 allowed localized ROS generation to mediate sustained Src oxidation and activation.
639 23612968 To determine the mechanism of Nox4 recruitment, we analyzed the role of Grb2, a component of the SHPS-1 signaling complex.
640 23612968 We determined that Nox4 Tyr-491 was phosphorylated after IGF-I stimulation and was responsible for Nox4 binding to the SH2 domain of Grb2.
641 23612968 Overexpression of a Nox4 mutant, Y491F, prevented Nox4/Grb2 association.
642 23612968 Importantly, it also prevented Nox4 recruitment to SHPS-1.
643 23612968 The role of Grb2 was confirmed using a Pyk2 Y881F mutant, which blocked Grb2 recruitment to SHPS-1.
644 23612968 Cells expressing this mutant had impaired Nox4 recruitment to SHPS-1.
645 23612968 IGF-I-stimulated downstream signaling and biological actions were also significantly impaired in Nox4 Y491F-overexpressing cells.
646 23612968 Disruption of Nox4 recruitment to SHPS-1 in aorta from diabetic mice inhibited IGF-I-stimulated Src oxidation and activation as well as cell proliferation.
647 23612968 Recruitment of Nox4 to a plasma membrane scaffold is required for localized reactive oxygen species generation and sustained Src activation in response to insulin-like growth factor-I.
648 23612968 Nox4-derived ROS is increased in response to hyperglycemia and is required for IGF-I-stimulated Src activation.
649 23612968 This study was undertaken to determine the mechanism by which Nox4 mediates sustained Src activation.
650 23612968 IGF-I stimulated sustained Src activation, which occurred primarily on the SHPS-1 scaffold protein.
651 23612968 In vitro oxidation experiments indicated that Nox4-derived ROS was able to oxidize Src when they are in close proximity, and Src oxidation leads to its activation.
652 23612968 Therefore we hypothesized that Nox4 recruitment to the plasma membrane scaffold SHPS-1 allowed localized ROS generation to mediate sustained Src oxidation and activation.
653 23612968 To determine the mechanism of Nox4 recruitment, we analyzed the role of Grb2, a component of the SHPS-1 signaling complex.
654 23612968 We determined that Nox4 Tyr-491 was phosphorylated after IGF-I stimulation and was responsible for Nox4 binding to the SH2 domain of Grb2.
655 23612968 Overexpression of a Nox4 mutant, Y491F, prevented Nox4/Grb2 association.
656 23612968 Importantly, it also prevented Nox4 recruitment to SHPS-1.
657 23612968 The role of Grb2 was confirmed using a Pyk2 Y881F mutant, which blocked Grb2 recruitment to SHPS-1.
658 23612968 Cells expressing this mutant had impaired Nox4 recruitment to SHPS-1.
659 23612968 IGF-I-stimulated downstream signaling and biological actions were also significantly impaired in Nox4 Y491F-overexpressing cells.
660 23612968 Disruption of Nox4 recruitment to SHPS-1 in aorta from diabetic mice inhibited IGF-I-stimulated Src oxidation and activation as well as cell proliferation.
661 23612968 Recruitment of Nox4 to a plasma membrane scaffold is required for localized reactive oxygen species generation and sustained Src activation in response to insulin-like growth factor-I.
662 23612968 Nox4-derived ROS is increased in response to hyperglycemia and is required for IGF-I-stimulated Src activation.
663 23612968 This study was undertaken to determine the mechanism by which Nox4 mediates sustained Src activation.
664 23612968 IGF-I stimulated sustained Src activation, which occurred primarily on the SHPS-1 scaffold protein.
665 23612968 In vitro oxidation experiments indicated that Nox4-derived ROS was able to oxidize Src when they are in close proximity, and Src oxidation leads to its activation.
666 23612968 Therefore we hypothesized that Nox4 recruitment to the plasma membrane scaffold SHPS-1 allowed localized ROS generation to mediate sustained Src oxidation and activation.
667 23612968 To determine the mechanism of Nox4 recruitment, we analyzed the role of Grb2, a component of the SHPS-1 signaling complex.
668 23612968 We determined that Nox4 Tyr-491 was phosphorylated after IGF-I stimulation and was responsible for Nox4 binding to the SH2 domain of Grb2.
669 23612968 Overexpression of a Nox4 mutant, Y491F, prevented Nox4/Grb2 association.
670 23612968 Importantly, it also prevented Nox4 recruitment to SHPS-1.
671 23612968 The role of Grb2 was confirmed using a Pyk2 Y881F mutant, which blocked Grb2 recruitment to SHPS-1.
672 23612968 Cells expressing this mutant had impaired Nox4 recruitment to SHPS-1.
673 23612968 IGF-I-stimulated downstream signaling and biological actions were also significantly impaired in Nox4 Y491F-overexpressing cells.
674 23612968 Disruption of Nox4 recruitment to SHPS-1 in aorta from diabetic mice inhibited IGF-I-stimulated Src oxidation and activation as well as cell proliferation.
675 23612968 Recruitment of Nox4 to a plasma membrane scaffold is required for localized reactive oxygen species generation and sustained Src activation in response to insulin-like growth factor-I.
676 23612968 Nox4-derived ROS is increased in response to hyperglycemia and is required for IGF-I-stimulated Src activation.
677 23612968 This study was undertaken to determine the mechanism by which Nox4 mediates sustained Src activation.
678 23612968 IGF-I stimulated sustained Src activation, which occurred primarily on the SHPS-1 scaffold protein.
679 23612968 In vitro oxidation experiments indicated that Nox4-derived ROS was able to oxidize Src when they are in close proximity, and Src oxidation leads to its activation.
680 23612968 Therefore we hypothesized that Nox4 recruitment to the plasma membrane scaffold SHPS-1 allowed localized ROS generation to mediate sustained Src oxidation and activation.
681 23612968 To determine the mechanism of Nox4 recruitment, we analyzed the role of Grb2, a component of the SHPS-1 signaling complex.
682 23612968 We determined that Nox4 Tyr-491 was phosphorylated after IGF-I stimulation and was responsible for Nox4 binding to the SH2 domain of Grb2.
683 23612968 Overexpression of a Nox4 mutant, Y491F, prevented Nox4/Grb2 association.
684 23612968 Importantly, it also prevented Nox4 recruitment to SHPS-1.
685 23612968 The role of Grb2 was confirmed using a Pyk2 Y881F mutant, which blocked Grb2 recruitment to SHPS-1.
686 23612968 Cells expressing this mutant had impaired Nox4 recruitment to SHPS-1.
687 23612968 IGF-I-stimulated downstream signaling and biological actions were also significantly impaired in Nox4 Y491F-overexpressing cells.
688 23612968 Disruption of Nox4 recruitment to SHPS-1 in aorta from diabetic mice inhibited IGF-I-stimulated Src oxidation and activation as well as cell proliferation.
689 23859619 Although AMPK activation inhibits tumor growth by targeting multiple signaling pathways relevant to tumorigenesis, under certain cellular contexts or certain stages of tumor development, AMPK might act as a protective response to metabolic stresses, such as nutrient deprivation, low oxygen, and low pH, or as downstream effectors of oncogenic proteins, including androgen receptor, hypoxia-inducible factor-1α, c-Src, and MYC.
690 23942551 Inhibition of Src kinase blocks high glucose-induced EGFR transactivation and collagen synthesis in mesangial cells and prevents diabetic nephropathy in mice.
691 23942551 High glucose stimulated Src, TACE, epidermal growth factor receptor (EGFR), mitogen-activated protein kinases (MAPKs), extracellular signal-regulated kinase (ERK1/2, p38), and collagen IV accumulation in mesangial cells.
692 23942551 PP2 and SU6656 blocked high glucose-stimulated phosphorylation of Src Tyr-416, EGFR, and MAPKs.
693 23942551 These inhibitors and Src knockdown by siRNA, as well as TAPI-2, also abrogated high glucose-induced phosphorylation of these targets and collagen IV accumulation.
694 23942551 In STZ-diabetic mice, albuminuria, increased Src pTyr-416, TACE activation, ERK and EGFR phosphorylation, glomerular collagen accumulation, and podocyte loss were inhibited by PP2.
695 23942551 These data indicate a role for Src in a high glucose-Src-TACE-heparin-binding epidermal growth factor-EGFR-MAPK-signaling pathway to collagen accumulation.
696 23942551 Inhibition of Src kinase blocks high glucose-induced EGFR transactivation and collagen synthesis in mesangial cells and prevents diabetic nephropathy in mice.
697 23942551 High glucose stimulated Src, TACE, epidermal growth factor receptor (EGFR), mitogen-activated protein kinases (MAPKs), extracellular signal-regulated kinase (ERK1/2, p38), and collagen IV accumulation in mesangial cells.
698 23942551 PP2 and SU6656 blocked high glucose-stimulated phosphorylation of Src Tyr-416, EGFR, and MAPKs.
699 23942551 These inhibitors and Src knockdown by siRNA, as well as TAPI-2, also abrogated high glucose-induced phosphorylation of these targets and collagen IV accumulation.
700 23942551 In STZ-diabetic mice, albuminuria, increased Src pTyr-416, TACE activation, ERK and EGFR phosphorylation, glomerular collagen accumulation, and podocyte loss were inhibited by PP2.
701 23942551 These data indicate a role for Src in a high glucose-Src-TACE-heparin-binding epidermal growth factor-EGFR-MAPK-signaling pathway to collagen accumulation.
702 24002704 Effects of sevoflurane pretreatment on renal Src and FAK expression in diabetic rats after renal ischemia/reperfusion injury.
703 24002704 The aim of this study was to determine if sevoflurane pretreatment could help preserve renal function in rats with diabetes mellitus (DM) by altering non-receptor tyrosine kinases steroid receptor coactivator (Src) and focal adhesion kinase (FAK) expression (Src and FAK are mediators of cellular apoptosis and necrosis).
704 24002704 After 24 h, serum creatinine (Cr) and blood urea nitrogen (BUN) levels, and renal Src and FAK expression (immunohistochemistry) were assessed.
705 24002704 Compared with rats in C, rats in D had significantly higher Cr and BUN levels, but significantly lower renal Src and FAK expression.
706 24002704 Rats in E had significantly lower serum Cr and BUN levels and significantly higher renal Src and FAK expression levels than rats in D.
707 24002704 Our findings suggest that sevoflurane pretreatment in rats with DM protects the kidneys from ischemia/reperfusion injury in part due to increased renal Src and FAK expression.
708 24002704 Effects of sevoflurane pretreatment on renal Src and FAK expression in diabetic rats after renal ischemia/reperfusion injury.
709 24002704 The aim of this study was to determine if sevoflurane pretreatment could help preserve renal function in rats with diabetes mellitus (DM) by altering non-receptor tyrosine kinases steroid receptor coactivator (Src) and focal adhesion kinase (FAK) expression (Src and FAK are mediators of cellular apoptosis and necrosis).
710 24002704 After 24 h, serum creatinine (Cr) and blood urea nitrogen (BUN) levels, and renal Src and FAK expression (immunohistochemistry) were assessed.
711 24002704 Compared with rats in C, rats in D had significantly higher Cr and BUN levels, but significantly lower renal Src and FAK expression.
712 24002704 Rats in E had significantly lower serum Cr and BUN levels and significantly higher renal Src and FAK expression levels than rats in D.
713 24002704 Our findings suggest that sevoflurane pretreatment in rats with DM protects the kidneys from ischemia/reperfusion injury in part due to increased renal Src and FAK expression.
714 24002704 Effects of sevoflurane pretreatment on renal Src and FAK expression in diabetic rats after renal ischemia/reperfusion injury.
715 24002704 The aim of this study was to determine if sevoflurane pretreatment could help preserve renal function in rats with diabetes mellitus (DM) by altering non-receptor tyrosine kinases steroid receptor coactivator (Src) and focal adhesion kinase (FAK) expression (Src and FAK are mediators of cellular apoptosis and necrosis).
716 24002704 After 24 h, serum creatinine (Cr) and blood urea nitrogen (BUN) levels, and renal Src and FAK expression (immunohistochemistry) were assessed.
717 24002704 Compared with rats in C, rats in D had significantly higher Cr and BUN levels, but significantly lower renal Src and FAK expression.
718 24002704 Rats in E had significantly lower serum Cr and BUN levels and significantly higher renal Src and FAK expression levels than rats in D.
719 24002704 Our findings suggest that sevoflurane pretreatment in rats with DM protects the kidneys from ischemia/reperfusion injury in part due to increased renal Src and FAK expression.
720 24002704 Effects of sevoflurane pretreatment on renal Src and FAK expression in diabetic rats after renal ischemia/reperfusion injury.
721 24002704 The aim of this study was to determine if sevoflurane pretreatment could help preserve renal function in rats with diabetes mellitus (DM) by altering non-receptor tyrosine kinases steroid receptor coactivator (Src) and focal adhesion kinase (FAK) expression (Src and FAK are mediators of cellular apoptosis and necrosis).
722 24002704 After 24 h, serum creatinine (Cr) and blood urea nitrogen (BUN) levels, and renal Src and FAK expression (immunohistochemistry) were assessed.
723 24002704 Compared with rats in C, rats in D had significantly higher Cr and BUN levels, but significantly lower renal Src and FAK expression.
724 24002704 Rats in E had significantly lower serum Cr and BUN levels and significantly higher renal Src and FAK expression levels than rats in D.
725 24002704 Our findings suggest that sevoflurane pretreatment in rats with DM protects the kidneys from ischemia/reperfusion injury in part due to increased renal Src and FAK expression.
726 24002704 Effects of sevoflurane pretreatment on renal Src and FAK expression in diabetic rats after renal ischemia/reperfusion injury.
727 24002704 The aim of this study was to determine if sevoflurane pretreatment could help preserve renal function in rats with diabetes mellitus (DM) by altering non-receptor tyrosine kinases steroid receptor coactivator (Src) and focal adhesion kinase (FAK) expression (Src and FAK are mediators of cellular apoptosis and necrosis).
728 24002704 After 24 h, serum creatinine (Cr) and blood urea nitrogen (BUN) levels, and renal Src and FAK expression (immunohistochemistry) were assessed.
729 24002704 Compared with rats in C, rats in D had significantly higher Cr and BUN levels, but significantly lower renal Src and FAK expression.
730 24002704 Rats in E had significantly lower serum Cr and BUN levels and significantly higher renal Src and FAK expression levels than rats in D.
731 24002704 Our findings suggest that sevoflurane pretreatment in rats with DM protects the kidneys from ischemia/reperfusion injury in part due to increased renal Src and FAK expression.
732 24002704 Effects of sevoflurane pretreatment on renal Src and FAK expression in diabetic rats after renal ischemia/reperfusion injury.
733 24002704 The aim of this study was to determine if sevoflurane pretreatment could help preserve renal function in rats with diabetes mellitus (DM) by altering non-receptor tyrosine kinases steroid receptor coactivator (Src) and focal adhesion kinase (FAK) expression (Src and FAK are mediators of cellular apoptosis and necrosis).
734 24002704 After 24 h, serum creatinine (Cr) and blood urea nitrogen (BUN) levels, and renal Src and FAK expression (immunohistochemistry) were assessed.
735 24002704 Compared with rats in C, rats in D had significantly higher Cr and BUN levels, but significantly lower renal Src and FAK expression.
736 24002704 Rats in E had significantly lower serum Cr and BUN levels and significantly higher renal Src and FAK expression levels than rats in D.
737 24002704 Our findings suggest that sevoflurane pretreatment in rats with DM protects the kidneys from ischemia/reperfusion injury in part due to increased renal Src and FAK expression.