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PMID |
Sentence |
1 |
10395678
|
TCR and CD28 are coupled via ZAP-70 to the activation of the Vav/Rac-1-/PAK-1/p38 MAPK signaling pathway.
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2 |
10395678
|
The small GTPase Rac-1 controls the catalytic activity of the mitogen-activated protein kinases (MAPKs) and cell cycle progression through G1.
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3 |
10395678
|
Rac-1 activation requires the phospho-tyrosine (p-Tyr)-dependent recruitment of the Vav GDP releasing factor (GRF) to the plasma membrane and assembly of GTPase/GRF complexes, an event critical for Ag receptor-triggered T cell activation.
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4 |
10395678
|
Here, we show that TCR/CD28 costimulation synergistically induces Rac-1 GDP/GTP exchange.
|
5 |
10395678
|
Our findings, obtained by using ZAP-70-negative Jurkat T cells, indicate that CD28 costimulation augments TCR-mediated T cell activation by increasing the ZAP-70-mediated Tyr phosphorylation of Vav.
|
6 |
10395678
|
This event regulates the Rac-1-associated GTP/GDP exchange activity of Vav and downstream pathway(s) leading to PAK-1 and p38 MAPK activation.
|
7 |
10395678
|
CD28 amplifies TCR-induced ZAP-70 activity and association of Vav with ZAP-70 and linker for activation of T cells (LAT).
|
8 |
10395678
|
These results favor a model in which ZAP-70 regulates the intersection of the TCR and CD28 signaling pathways, which elicits the coupling of TCR and CD28 to the Rac-1, PAK-1, and p38 MAPK effector molecules.
|
9 |
10395678
|
TCR and CD28 are coupled via ZAP-70 to the activation of the Vav/Rac-1-/PAK-1/p38 MAPK signaling pathway.
|
10 |
10395678
|
The small GTPase Rac-1 controls the catalytic activity of the mitogen-activated protein kinases (MAPKs) and cell cycle progression through G1.
|
11 |
10395678
|
Rac-1 activation requires the phospho-tyrosine (p-Tyr)-dependent recruitment of the Vav GDP releasing factor (GRF) to the plasma membrane and assembly of GTPase/GRF complexes, an event critical for Ag receptor-triggered T cell activation.
|
12 |
10395678
|
Here, we show that TCR/CD28 costimulation synergistically induces Rac-1 GDP/GTP exchange.
|
13 |
10395678
|
Our findings, obtained by using ZAP-70-negative Jurkat T cells, indicate that CD28 costimulation augments TCR-mediated T cell activation by increasing the ZAP-70-mediated Tyr phosphorylation of Vav.
|
14 |
10395678
|
This event regulates the Rac-1-associated GTP/GDP exchange activity of Vav and downstream pathway(s) leading to PAK-1 and p38 MAPK activation.
|
15 |
10395678
|
CD28 amplifies TCR-induced ZAP-70 activity and association of Vav with ZAP-70 and linker for activation of T cells (LAT).
|
16 |
10395678
|
These results favor a model in which ZAP-70 regulates the intersection of the TCR and CD28 signaling pathways, which elicits the coupling of TCR and CD28 to the Rac-1, PAK-1, and p38 MAPK effector molecules.
|
17 |
10395678
|
TCR and CD28 are coupled via ZAP-70 to the activation of the Vav/Rac-1-/PAK-1/p38 MAPK signaling pathway.
|
18 |
10395678
|
The small GTPase Rac-1 controls the catalytic activity of the mitogen-activated protein kinases (MAPKs) and cell cycle progression through G1.
|
19 |
10395678
|
Rac-1 activation requires the phospho-tyrosine (p-Tyr)-dependent recruitment of the Vav GDP releasing factor (GRF) to the plasma membrane and assembly of GTPase/GRF complexes, an event critical for Ag receptor-triggered T cell activation.
|
20 |
10395678
|
Here, we show that TCR/CD28 costimulation synergistically induces Rac-1 GDP/GTP exchange.
|
21 |
10395678
|
Our findings, obtained by using ZAP-70-negative Jurkat T cells, indicate that CD28 costimulation augments TCR-mediated T cell activation by increasing the ZAP-70-mediated Tyr phosphorylation of Vav.
|
22 |
10395678
|
This event regulates the Rac-1-associated GTP/GDP exchange activity of Vav and downstream pathway(s) leading to PAK-1 and p38 MAPK activation.
|
23 |
10395678
|
CD28 amplifies TCR-induced ZAP-70 activity and association of Vav with ZAP-70 and linker for activation of T cells (LAT).
|
24 |
10395678
|
These results favor a model in which ZAP-70 regulates the intersection of the TCR and CD28 signaling pathways, which elicits the coupling of TCR and CD28 to the Rac-1, PAK-1, and p38 MAPK effector molecules.
|
25 |
11733498
|
Interaction between active Pak1 and Raf-1 is necessary for phosphorylation and activation of Raf-1.
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26 |
11733498
|
Previous studies have shown that Pak1/2 is implicated in both Ras-dependent and -independent activation of Raf-1 by phosphorylating Raf Ser(338).
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27 |
11733498
|
The present study explores the structural basis of Raf-1 phosphorylation by Pak1.
|
28 |
11733498
|
Interaction between active Pak1 and Raf-1 is necessary for phosphorylation and activation of Raf-1.
|
29 |
11733498
|
Previous studies have shown that Pak1/2 is implicated in both Ras-dependent and -independent activation of Raf-1 by phosphorylating Raf Ser(338).
|
30 |
11733498
|
The present study explores the structural basis of Raf-1 phosphorylation by Pak1.
|
31 |
11733498
|
Interaction between active Pak1 and Raf-1 is necessary for phosphorylation and activation of Raf-1.
|
32 |
11733498
|
Previous studies have shown that Pak1/2 is implicated in both Ras-dependent and -independent activation of Raf-1 by phosphorylating Raf Ser(338).
|
33 |
11733498
|
The present study explores the structural basis of Raf-1 phosphorylation by Pak1.
|
34 |
14614828
|
LKB1 is the upstream kinase in the AMP-activated protein kinase cascade.
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35 |
14614828
|
We previously reported the identification of three protein kinases (Elm1, Pak1, and Tos3 [9]) that lie upstream of Snf1, the yeast homologue of AMPK.
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36 |
14614828
|
LKB1 shares sequence similarity with Elm1, Pak1, and Tos3, and we demonstrated that LKB1 phosphorylates AMPK on the activation loop threonine (Thr172) within the catalytic subunit and activates AMPK in vitro [9].
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37 |
14614828
|
AMPKK purified from rat liver corresponds to LKB1, and blocking LKB1 activity in cells abolishes AMPK activation in response to different stimuli.
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38 |
14614828
|
LKB1 is the upstream kinase in the AMP-activated protein kinase cascade.
|
39 |
14614828
|
We previously reported the identification of three protein kinases (Elm1, Pak1, and Tos3 [9]) that lie upstream of Snf1, the yeast homologue of AMPK.
|
40 |
14614828
|
LKB1 shares sequence similarity with Elm1, Pak1, and Tos3, and we demonstrated that LKB1 phosphorylates AMPK on the activation loop threonine (Thr172) within the catalytic subunit and activates AMPK in vitro [9].
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41 |
14614828
|
AMPKK purified from rat liver corresponds to LKB1, and blocking LKB1 activity in cells abolishes AMPK activation in response to different stimuli.
|
42 |
19581924
|
We found previously that in intestinal cells, insulin or insulin-like growth factor-1 stimulates c-Myc and cyclin D1 protein expression through both Akt-dependent and Akt-independent mechanisms.
|
43 |
19581924
|
The effect of Akt is attributed to the stimulation of c-Myc translation by mammalian target of rapamycin.
|
44 |
19581924
|
However, Akt-independent stimulation was, associated with an increase in beta-catenin (beta-cat) in the nucleus and an increased association between beta-cat and T-cell factor binding sites on the c-Myc promoter, detected by chromatin immunoprecipitation.
|
45 |
19581924
|
In this study, we show that insulin stimulated the phosphorylation/activation of p-21-activated protein kinase-1 (PAK-1) in an Akt-independent manner in vitro and in an in vivo hyperinsulinemic mouse model.
|
46 |
19581924
|
Significantly, shRNA (small hairpin RNA)-mediated PAK-1 knockdown attenuated both basal and insulin-stimulated c-Myc and cyclin D1 expression, associated with a marked reduction in extracellular signal-regulated kinase activation and beta-cat phosphorylation at Ser675.
|
47 |
19581924
|
Furthermore, PAK-1 silencing led to a complete blockade of insulin-stimulated beta-cat binding to the c-Myc promoter and cellular growth.
|
48 |
19581924
|
Finally, inhibition of MEK, a downstream target of PAK-1, blocked insulin-stimulated nuclear beta-cat accumulation and c-Myc expression.
|
49 |
19581924
|
Our observations suggest that PAK-1 serves as an important linker between insulin and Wnt signaling pathways.
|
50 |
19581924
|
We found previously that in intestinal cells, insulin or insulin-like growth factor-1 stimulates c-Myc and cyclin D1 protein expression through both Akt-dependent and Akt-independent mechanisms.
|
51 |
19581924
|
The effect of Akt is attributed to the stimulation of c-Myc translation by mammalian target of rapamycin.
|
52 |
19581924
|
However, Akt-independent stimulation was, associated with an increase in beta-catenin (beta-cat) in the nucleus and an increased association between beta-cat and T-cell factor binding sites on the c-Myc promoter, detected by chromatin immunoprecipitation.
|
53 |
19581924
|
In this study, we show that insulin stimulated the phosphorylation/activation of p-21-activated protein kinase-1 (PAK-1) in an Akt-independent manner in vitro and in an in vivo hyperinsulinemic mouse model.
|
54 |
19581924
|
Significantly, shRNA (small hairpin RNA)-mediated PAK-1 knockdown attenuated both basal and insulin-stimulated c-Myc and cyclin D1 expression, associated with a marked reduction in extracellular signal-regulated kinase activation and beta-cat phosphorylation at Ser675.
|
55 |
19581924
|
Furthermore, PAK-1 silencing led to a complete blockade of insulin-stimulated beta-cat binding to the c-Myc promoter and cellular growth.
|
56 |
19581924
|
Finally, inhibition of MEK, a downstream target of PAK-1, blocked insulin-stimulated nuclear beta-cat accumulation and c-Myc expression.
|
57 |
19581924
|
Our observations suggest that PAK-1 serves as an important linker between insulin and Wnt signaling pathways.
|
58 |
19581924
|
We found previously that in intestinal cells, insulin or insulin-like growth factor-1 stimulates c-Myc and cyclin D1 protein expression through both Akt-dependent and Akt-independent mechanisms.
|
59 |
19581924
|
The effect of Akt is attributed to the stimulation of c-Myc translation by mammalian target of rapamycin.
|
60 |
19581924
|
However, Akt-independent stimulation was, associated with an increase in beta-catenin (beta-cat) in the nucleus and an increased association between beta-cat and T-cell factor binding sites on the c-Myc promoter, detected by chromatin immunoprecipitation.
|
61 |
19581924
|
In this study, we show that insulin stimulated the phosphorylation/activation of p-21-activated protein kinase-1 (PAK-1) in an Akt-independent manner in vitro and in an in vivo hyperinsulinemic mouse model.
|
62 |
19581924
|
Significantly, shRNA (small hairpin RNA)-mediated PAK-1 knockdown attenuated both basal and insulin-stimulated c-Myc and cyclin D1 expression, associated with a marked reduction in extracellular signal-regulated kinase activation and beta-cat phosphorylation at Ser675.
|
63 |
19581924
|
Furthermore, PAK-1 silencing led to a complete blockade of insulin-stimulated beta-cat binding to the c-Myc promoter and cellular growth.
|
64 |
19581924
|
Finally, inhibition of MEK, a downstream target of PAK-1, blocked insulin-stimulated nuclear beta-cat accumulation and c-Myc expression.
|
65 |
19581924
|
Our observations suggest that PAK-1 serves as an important linker between insulin and Wnt signaling pathways.
|
66 |
19581924
|
We found previously that in intestinal cells, insulin or insulin-like growth factor-1 stimulates c-Myc and cyclin D1 protein expression through both Akt-dependent and Akt-independent mechanisms.
|
67 |
19581924
|
The effect of Akt is attributed to the stimulation of c-Myc translation by mammalian target of rapamycin.
|
68 |
19581924
|
However, Akt-independent stimulation was, associated with an increase in beta-catenin (beta-cat) in the nucleus and an increased association between beta-cat and T-cell factor binding sites on the c-Myc promoter, detected by chromatin immunoprecipitation.
|
69 |
19581924
|
In this study, we show that insulin stimulated the phosphorylation/activation of p-21-activated protein kinase-1 (PAK-1) in an Akt-independent manner in vitro and in an in vivo hyperinsulinemic mouse model.
|
70 |
19581924
|
Significantly, shRNA (small hairpin RNA)-mediated PAK-1 knockdown attenuated both basal and insulin-stimulated c-Myc and cyclin D1 expression, associated with a marked reduction in extracellular signal-regulated kinase activation and beta-cat phosphorylation at Ser675.
|
71 |
19581924
|
Furthermore, PAK-1 silencing led to a complete blockade of insulin-stimulated beta-cat binding to the c-Myc promoter and cellular growth.
|
72 |
19581924
|
Finally, inhibition of MEK, a downstream target of PAK-1, blocked insulin-stimulated nuclear beta-cat accumulation and c-Myc expression.
|
73 |
19581924
|
Our observations suggest that PAK-1 serves as an important linker between insulin and Wnt signaling pathways.
|
74 |
19581924
|
We found previously that in intestinal cells, insulin or insulin-like growth factor-1 stimulates c-Myc and cyclin D1 protein expression through both Akt-dependent and Akt-independent mechanisms.
|
75 |
19581924
|
The effect of Akt is attributed to the stimulation of c-Myc translation by mammalian target of rapamycin.
|
76 |
19581924
|
However, Akt-independent stimulation was, associated with an increase in beta-catenin (beta-cat) in the nucleus and an increased association between beta-cat and T-cell factor binding sites on the c-Myc promoter, detected by chromatin immunoprecipitation.
|
77 |
19581924
|
In this study, we show that insulin stimulated the phosphorylation/activation of p-21-activated protein kinase-1 (PAK-1) in an Akt-independent manner in vitro and in an in vivo hyperinsulinemic mouse model.
|
78 |
19581924
|
Significantly, shRNA (small hairpin RNA)-mediated PAK-1 knockdown attenuated both basal and insulin-stimulated c-Myc and cyclin D1 expression, associated with a marked reduction in extracellular signal-regulated kinase activation and beta-cat phosphorylation at Ser675.
|
79 |
19581924
|
Furthermore, PAK-1 silencing led to a complete blockade of insulin-stimulated beta-cat binding to the c-Myc promoter and cellular growth.
|
80 |
19581924
|
Finally, inhibition of MEK, a downstream target of PAK-1, blocked insulin-stimulated nuclear beta-cat accumulation and c-Myc expression.
|
81 |
19581924
|
Our observations suggest that PAK-1 serves as an important linker between insulin and Wnt signaling pathways.
|
82 |
21969371
|
Inhibition or ablation of p21-activated kinase (PAK1) disrupts glucose homeostatic mechanisms in vivo.
|
83 |
21969371
|
The p21-activated kinase PAK1 is implicated in tumorigenesis, and efforts to inhibit PAK1 signaling as a means to induce tumor cell apoptosis are underway.
|
84 |
21969371
|
Mimicking this, islets from PAK1(-/-) knock-out mice exhibited profound defects in the second/sustained-phase of insulin secretion.
|
85 |
21969371
|
Analyses of human and mouse islet beta cell signaling revealed PAK1 activation to be 1) dependent upon Cdc42 abundance, 2) crucial for signaling downstream to activate ERK1/2, but 3) dispensable for cofilin phosphorylation.
|
86 |
21969371
|
Exacerbating this, the PAK1(-/-) knock-out mice also exhibited peripheral insulin resistance.
|
87 |
21969371
|
Insulin resistance was coupled to ablation of insulin-stimulated GLUT4 translocation in skeletal muscle from PAK1(-/-) knock-out mice, and in sharp contrast to islet beta cells, skeletal muscle PAK1 loss was underscored by defective cofilin phosphorylation but normal ERK1/2 activation.
|
88 |
21969371
|
Inhibition or ablation of p21-activated kinase (PAK1) disrupts glucose homeostatic mechanisms in vivo.
|
89 |
21969371
|
The p21-activated kinase PAK1 is implicated in tumorigenesis, and efforts to inhibit PAK1 signaling as a means to induce tumor cell apoptosis are underway.
|
90 |
21969371
|
Mimicking this, islets from PAK1(-/-) knock-out mice exhibited profound defects in the second/sustained-phase of insulin secretion.
|
91 |
21969371
|
Analyses of human and mouse islet beta cell signaling revealed PAK1 activation to be 1) dependent upon Cdc42 abundance, 2) crucial for signaling downstream to activate ERK1/2, but 3) dispensable for cofilin phosphorylation.
|
92 |
21969371
|
Exacerbating this, the PAK1(-/-) knock-out mice also exhibited peripheral insulin resistance.
|
93 |
21969371
|
Insulin resistance was coupled to ablation of insulin-stimulated GLUT4 translocation in skeletal muscle from PAK1(-/-) knock-out mice, and in sharp contrast to islet beta cells, skeletal muscle PAK1 loss was underscored by defective cofilin phosphorylation but normal ERK1/2 activation.
|
94 |
21969371
|
Inhibition or ablation of p21-activated kinase (PAK1) disrupts glucose homeostatic mechanisms in vivo.
|
95 |
21969371
|
The p21-activated kinase PAK1 is implicated in tumorigenesis, and efforts to inhibit PAK1 signaling as a means to induce tumor cell apoptosis are underway.
|
96 |
21969371
|
Mimicking this, islets from PAK1(-/-) knock-out mice exhibited profound defects in the second/sustained-phase of insulin secretion.
|
97 |
21969371
|
Analyses of human and mouse islet beta cell signaling revealed PAK1 activation to be 1) dependent upon Cdc42 abundance, 2) crucial for signaling downstream to activate ERK1/2, but 3) dispensable for cofilin phosphorylation.
|
98 |
21969371
|
Exacerbating this, the PAK1(-/-) knock-out mice also exhibited peripheral insulin resistance.
|
99 |
21969371
|
Insulin resistance was coupled to ablation of insulin-stimulated GLUT4 translocation in skeletal muscle from PAK1(-/-) knock-out mice, and in sharp contrast to islet beta cells, skeletal muscle PAK1 loss was underscored by defective cofilin phosphorylation but normal ERK1/2 activation.
|
100 |
21969371
|
Inhibition or ablation of p21-activated kinase (PAK1) disrupts glucose homeostatic mechanisms in vivo.
|
101 |
21969371
|
The p21-activated kinase PAK1 is implicated in tumorigenesis, and efforts to inhibit PAK1 signaling as a means to induce tumor cell apoptosis are underway.
|
102 |
21969371
|
Mimicking this, islets from PAK1(-/-) knock-out mice exhibited profound defects in the second/sustained-phase of insulin secretion.
|
103 |
21969371
|
Analyses of human and mouse islet beta cell signaling revealed PAK1 activation to be 1) dependent upon Cdc42 abundance, 2) crucial for signaling downstream to activate ERK1/2, but 3) dispensable for cofilin phosphorylation.
|
104 |
21969371
|
Exacerbating this, the PAK1(-/-) knock-out mice also exhibited peripheral insulin resistance.
|
105 |
21969371
|
Insulin resistance was coupled to ablation of insulin-stimulated GLUT4 translocation in skeletal muscle from PAK1(-/-) knock-out mice, and in sharp contrast to islet beta cells, skeletal muscle PAK1 loss was underscored by defective cofilin phosphorylation but normal ERK1/2 activation.
|
106 |
21969371
|
Inhibition or ablation of p21-activated kinase (PAK1) disrupts glucose homeostatic mechanisms in vivo.
|
107 |
21969371
|
The p21-activated kinase PAK1 is implicated in tumorigenesis, and efforts to inhibit PAK1 signaling as a means to induce tumor cell apoptosis are underway.
|
108 |
21969371
|
Mimicking this, islets from PAK1(-/-) knock-out mice exhibited profound defects in the second/sustained-phase of insulin secretion.
|
109 |
21969371
|
Analyses of human and mouse islet beta cell signaling revealed PAK1 activation to be 1) dependent upon Cdc42 abundance, 2) crucial for signaling downstream to activate ERK1/2, but 3) dispensable for cofilin phosphorylation.
|
110 |
21969371
|
Exacerbating this, the PAK1(-/-) knock-out mice also exhibited peripheral insulin resistance.
|
111 |
21969371
|
Insulin resistance was coupled to ablation of insulin-stimulated GLUT4 translocation in skeletal muscle from PAK1(-/-) knock-out mice, and in sharp contrast to islet beta cells, skeletal muscle PAK1 loss was underscored by defective cofilin phosphorylation but normal ERK1/2 activation.
|
112 |
21969371
|
Inhibition or ablation of p21-activated kinase (PAK1) disrupts glucose homeostatic mechanisms in vivo.
|
113 |
21969371
|
The p21-activated kinase PAK1 is implicated in tumorigenesis, and efforts to inhibit PAK1 signaling as a means to induce tumor cell apoptosis are underway.
|
114 |
21969371
|
Mimicking this, islets from PAK1(-/-) knock-out mice exhibited profound defects in the second/sustained-phase of insulin secretion.
|
115 |
21969371
|
Analyses of human and mouse islet beta cell signaling revealed PAK1 activation to be 1) dependent upon Cdc42 abundance, 2) crucial for signaling downstream to activate ERK1/2, but 3) dispensable for cofilin phosphorylation.
|
116 |
21969371
|
Exacerbating this, the PAK1(-/-) knock-out mice also exhibited peripheral insulin resistance.
|
117 |
21969371
|
Insulin resistance was coupled to ablation of insulin-stimulated GLUT4 translocation in skeletal muscle from PAK1(-/-) knock-out mice, and in sharp contrast to islet beta cells, skeletal muscle PAK1 loss was underscored by defective cofilin phosphorylation but normal ERK1/2 activation.
|
118 |
23423567
|
Rac1 signaling is required for insulin-stimulated glucose uptake and is dysregulated in insulin-resistant murine and human skeletal muscle.
|
119 |
23423567
|
The actin cytoskeleton-regulating GTPase Rac1 is required for insulin-stimulated GLUT4 translocation in cultured muscle cells.
|
120 |
23423567
|
However, involvement of Rac1 and its downstream signaling in glucose transport in insulin-sensitive and insulin-resistant mature skeletal muscle has not previously been investigated.
|
121 |
23423567
|
We hypothesized that Rac1 and its downstream target, p21-activated kinase (PAK), are regulators of insulin-stimulated glucose uptake in mouse and human skeletal muscle and are dysregulated in insulin-resistant states.
|
122 |
23423567
|
Muscle-specific inducible Rac1 knockout (KO) mice and pharmacological inhibition of Rac1 were used to determine whether Rac1 regulates insulin-stimulated glucose transport in mature skeletal muscle.
|
123 |
23423567
|
Furthermore, Rac1 and PAK1 expression and signaling were investigated in muscle of insulin-resistant mice and humans.
|
124 |
23423567
|
Inhibition and KO of Rac1 decreased insulin-stimulated glucose transport in mouse soleus and extensor digitorum longus muscles ex vivo.
|
125 |
23423567
|
Rac1 KO mice showed decreased insulin and glucose tolerance and trended toward higher plasma insulin concentrations after intraperitoneal glucose injection.
|
126 |
23423567
|
Rac1 protein expression and insulin-stimulated PAK(Thr423) phosphorylation were decreased in muscles of high fat-fed mice.
|
127 |
23423567
|
These findings show that Rac1 is a regulator of insulin-stimulated glucose uptake and a novel candidate involved in skeletal muscle insulin resistance.
|
128 |
23514967
|
Depletion of PAK1 enhances ubiquitin-mediated survivin degradation in pancreatic β-cells.
|
129 |
23514967
|
Here, we aim to address the linkage between PAK1 and Survivin, a protein essential for β-cell replication.
|
130 |
23514967
|
PAK1 knockout (KO) mouse islets exhibited decreased expression of Survivin protein.
|
131 |
23514967
|
MIN6 β-cells with siRNA-mediated suppression of PAK1 also had decreased Survivin protein and exhibited an increased level of ubiquitinated-Survivin.
|
132 |
23514967
|
However, no significant changes in Survivin mRNA were found in islets from PAK1 KO mice and PAK1-depleted MIN6 β-cells.
|
133 |
23514967
|
The decreased Survivin level in MIN6 cells subjected to hyperglycemic stress was prevented by expression of exogenous PAK1.
|
134 |
23514967
|
Moreover, overexpressing Survivin restored proliferation of β-cells that was impaired by the loss of PAK1.
|
135 |
23514967
|
These data implicate a role for PAK1 in regulating Survivin protein stability in the β-cell and suggest PAK1 as a potential molecular target for the restoration of β-cell mass.
|
136 |
23514967
|
Depletion of PAK1 enhances ubiquitin-mediated survivin degradation in pancreatic β-cells.
|
137 |
23514967
|
Here, we aim to address the linkage between PAK1 and Survivin, a protein essential for β-cell replication.
|
138 |
23514967
|
PAK1 knockout (KO) mouse islets exhibited decreased expression of Survivin protein.
|
139 |
23514967
|
MIN6 β-cells with siRNA-mediated suppression of PAK1 also had decreased Survivin protein and exhibited an increased level of ubiquitinated-Survivin.
|
140 |
23514967
|
However, no significant changes in Survivin mRNA were found in islets from PAK1 KO mice and PAK1-depleted MIN6 β-cells.
|
141 |
23514967
|
The decreased Survivin level in MIN6 cells subjected to hyperglycemic stress was prevented by expression of exogenous PAK1.
|
142 |
23514967
|
Moreover, overexpressing Survivin restored proliferation of β-cells that was impaired by the loss of PAK1.
|
143 |
23514967
|
These data implicate a role for PAK1 in regulating Survivin protein stability in the β-cell and suggest PAK1 as a potential molecular target for the restoration of β-cell mass.
|
144 |
23514967
|
Depletion of PAK1 enhances ubiquitin-mediated survivin degradation in pancreatic β-cells.
|
145 |
23514967
|
Here, we aim to address the linkage between PAK1 and Survivin, a protein essential for β-cell replication.
|
146 |
23514967
|
PAK1 knockout (KO) mouse islets exhibited decreased expression of Survivin protein.
|
147 |
23514967
|
MIN6 β-cells with siRNA-mediated suppression of PAK1 also had decreased Survivin protein and exhibited an increased level of ubiquitinated-Survivin.
|
148 |
23514967
|
However, no significant changes in Survivin mRNA were found in islets from PAK1 KO mice and PAK1-depleted MIN6 β-cells.
|
149 |
23514967
|
The decreased Survivin level in MIN6 cells subjected to hyperglycemic stress was prevented by expression of exogenous PAK1.
|
150 |
23514967
|
Moreover, overexpressing Survivin restored proliferation of β-cells that was impaired by the loss of PAK1.
|
151 |
23514967
|
These data implicate a role for PAK1 in regulating Survivin protein stability in the β-cell and suggest PAK1 as a potential molecular target for the restoration of β-cell mass.
|
152 |
23514967
|
Depletion of PAK1 enhances ubiquitin-mediated survivin degradation in pancreatic β-cells.
|
153 |
23514967
|
Here, we aim to address the linkage between PAK1 and Survivin, a protein essential for β-cell replication.
|
154 |
23514967
|
PAK1 knockout (KO) mouse islets exhibited decreased expression of Survivin protein.
|
155 |
23514967
|
MIN6 β-cells with siRNA-mediated suppression of PAK1 also had decreased Survivin protein and exhibited an increased level of ubiquitinated-Survivin.
|
156 |
23514967
|
However, no significant changes in Survivin mRNA were found in islets from PAK1 KO mice and PAK1-depleted MIN6 β-cells.
|
157 |
23514967
|
The decreased Survivin level in MIN6 cells subjected to hyperglycemic stress was prevented by expression of exogenous PAK1.
|
158 |
23514967
|
Moreover, overexpressing Survivin restored proliferation of β-cells that was impaired by the loss of PAK1.
|
159 |
23514967
|
These data implicate a role for PAK1 in regulating Survivin protein stability in the β-cell and suggest PAK1 as a potential molecular target for the restoration of β-cell mass.
|
160 |
23514967
|
Depletion of PAK1 enhances ubiquitin-mediated survivin degradation in pancreatic β-cells.
|
161 |
23514967
|
Here, we aim to address the linkage between PAK1 and Survivin, a protein essential for β-cell replication.
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162 |
23514967
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PAK1 knockout (KO) mouse islets exhibited decreased expression of Survivin protein.
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163 |
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MIN6 β-cells with siRNA-mediated suppression of PAK1 also had decreased Survivin protein and exhibited an increased level of ubiquitinated-Survivin.
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164 |
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However, no significant changes in Survivin mRNA were found in islets from PAK1 KO mice and PAK1-depleted MIN6 β-cells.
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165 |
23514967
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The decreased Survivin level in MIN6 cells subjected to hyperglycemic stress was prevented by expression of exogenous PAK1.
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166 |
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Moreover, overexpressing Survivin restored proliferation of β-cells that was impaired by the loss of PAK1.
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167 |
23514967
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These data implicate a role for PAK1 in regulating Survivin protein stability in the β-cell and suggest PAK1 as a potential molecular target for the restoration of β-cell mass.
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168 |
23514967
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Depletion of PAK1 enhances ubiquitin-mediated survivin degradation in pancreatic β-cells.
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169 |
23514967
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Here, we aim to address the linkage between PAK1 and Survivin, a protein essential for β-cell replication.
|
170 |
23514967
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PAK1 knockout (KO) mouse islets exhibited decreased expression of Survivin protein.
|
171 |
23514967
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MIN6 β-cells with siRNA-mediated suppression of PAK1 also had decreased Survivin protein and exhibited an increased level of ubiquitinated-Survivin.
|
172 |
23514967
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However, no significant changes in Survivin mRNA were found in islets from PAK1 KO mice and PAK1-depleted MIN6 β-cells.
|
173 |
23514967
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The decreased Survivin level in MIN6 cells subjected to hyperglycemic stress was prevented by expression of exogenous PAK1.
|
174 |
23514967
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Moreover, overexpressing Survivin restored proliferation of β-cells that was impaired by the loss of PAK1.
|
175 |
23514967
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These data implicate a role for PAK1 in regulating Survivin protein stability in the β-cell and suggest PAK1 as a potential molecular target for the restoration of β-cell mass.
|
176 |
23514967
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Depletion of PAK1 enhances ubiquitin-mediated survivin degradation in pancreatic β-cells.
|
177 |
23514967
|
Here, we aim to address the linkage between PAK1 and Survivin, a protein essential for β-cell replication.
|
178 |
23514967
|
PAK1 knockout (KO) mouse islets exhibited decreased expression of Survivin protein.
|
179 |
23514967
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MIN6 β-cells with siRNA-mediated suppression of PAK1 also had decreased Survivin protein and exhibited an increased level of ubiquitinated-Survivin.
|
180 |
23514967
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However, no significant changes in Survivin mRNA were found in islets from PAK1 KO mice and PAK1-depleted MIN6 β-cells.
|
181 |
23514967
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The decreased Survivin level in MIN6 cells subjected to hyperglycemic stress was prevented by expression of exogenous PAK1.
|
182 |
23514967
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Moreover, overexpressing Survivin restored proliferation of β-cells that was impaired by the loss of PAK1.
|
183 |
23514967
|
These data implicate a role for PAK1 in regulating Survivin protein stability in the β-cell and suggest PAK1 as a potential molecular target for the restoration of β-cell mass.
|
184 |
23514967
|
Depletion of PAK1 enhances ubiquitin-mediated survivin degradation in pancreatic β-cells.
|
185 |
23514967
|
Here, we aim to address the linkage between PAK1 and Survivin, a protein essential for β-cell replication.
|
186 |
23514967
|
PAK1 knockout (KO) mouse islets exhibited decreased expression of Survivin protein.
|
187 |
23514967
|
MIN6 β-cells with siRNA-mediated suppression of PAK1 also had decreased Survivin protein and exhibited an increased level of ubiquitinated-Survivin.
|
188 |
23514967
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However, no significant changes in Survivin mRNA were found in islets from PAK1 KO mice and PAK1-depleted MIN6 β-cells.
|
189 |
23514967
|
The decreased Survivin level in MIN6 cells subjected to hyperglycemic stress was prevented by expression of exogenous PAK1.
|
190 |
23514967
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Moreover, overexpressing Survivin restored proliferation of β-cells that was impaired by the loss of PAK1.
|
191 |
23514967
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These data implicate a role for PAK1 in regulating Survivin protein stability in the β-cell and suggest PAK1 as a potential molecular target for the restoration of β-cell mass.
|
192 |
23524293
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The group of AGC protein kinases includes more than 60 protein kinases in the human genome, classified into 14 families: PDK1, AKT/PKB, SGK, PKA, PKG, PKC, PKN/PRK, RSK, NDR, MAST, YANK, DMPK, GRK and SGK494.
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193 |
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This site is also essential to the mechanism of activation of AGC kinases by phosphorylation and is involved in the allosteric regulation of N-terminal domains of several AGC kinases, such as PKN/PRKs and atypical PKCs.
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194 |
23524293
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The group of AGC protein kinases includes more than 60 protein kinases in the human genome, classified into 14 families: PDK1, AKT/PKB, SGK, PKA, PKG, PKC, PKN/PRK, RSK, NDR, MAST, YANK, DMPK, GRK and SGK494.
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195 |
23524293
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This site is also essential to the mechanism of activation of AGC kinases by phosphorylation and is involved in the allosteric regulation of N-terminal domains of several AGC kinases, such as PKN/PRKs and atypical PKCs.
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196 |
23650610
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Toward addressing linkage of PAK1 to β-cell survival, PAK1-siRNA targeted MIN6 pancreatic β-cells were found to exhibit increased caspase-3 cleavage, cytosolic cytochrome-C and the pro-apoptotic protein Bad.
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197 |
23747564
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AGE-BSA-FITC uptake was significantly inhibited by amiloride and inhibitors of Arf6, Rac1, racGEF Tiam1, PAK1 and actin polymerisation.
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198 |
23747564
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AGE-BSA increased PAK1 kinase activity (212±41% vs control, p<0.05) and protein levels of Tiam1, a Rac1 activator.
|
199 |
23747564
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AGE-BSA-FITC uptake was significantly inhibited by amiloride and inhibitors of Arf6, Rac1, racGEF Tiam1, PAK1 and actin polymerisation.
|
200 |
23747564
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AGE-BSA increased PAK1 kinase activity (212±41% vs control, p<0.05) and protein levels of Tiam1, a Rac1 activator.
|