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PMID |
Sentence |
1 |
10811851
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These data suggest that PKB in liver plays a pivotal role in systemic glucose homeostasis and that PKB activation might be sufficient for reducing insulin resistance even without full activation of PI3K.
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2 |
11978789
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We now demonstrate that GLP-2, in a cycloheximide-insensitive manner, enhanced survival in baby hamster kidney cells stably transfected with the rat GLP-2R; reduced mitochondrial cytochrome c efflux; and attenuated the caspase-dependent cleavage of Akt, poly(ADP-ribose) polymerase, and beta-catenin following inhibition of phosphatidylinositol 3-kinase (PI3K) by LY294002.
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3 |
12663464
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Insulin receptor substrate (IRS)-1 was associated with PI3K activity, which is necessary for Akt activation by insulin, and was reduced in obese muscles, and this was accompanied by decreased IRS-1 expression.
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4 |
12594228
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In summary, (i) PI3K mediates insulin-induced reduction of IRS-1 by phosphorylating it while a PI3K/mTOR pathway controls insulin-induced reduction of IRS-2, (ii) in L6 cells, IRS-2 is the major adapter molecule linking the insulin receptor to activation of PKB and MAPK, (iii) the mechanism of IRS-1/2 down-regulation is different in L6 cells compared with 3T3-L1 adipocytes.
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5 |
16087719
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In normal rat adipocytes, GLP-1 and both exendins share with insulin an increasing action upon the activity of all kinases studied (except PKB), PI3K, p44 and p42 MAPKs and possibly PKC, all being required for their stimulating effect upon glucose uptake.
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6 |
16311104
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Glucose transport, insulin receptor (IR), and IR substrate 1 (IRS1) phosphorylation, phosphatidylinositol 3'-kinase (PI3K) activity, as well as Akt-Ser473 phosphorylation have been investigated at the end of the incubation period and after a further short-term insulin stimulation.
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7 |
16557003
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The PI3-K pathway, which activates serine/threonine protein kinase Akt, enhances NO synthase phosphorylation and NO production.
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8 |
16424109
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Unlike insulin, the PI3-K inhibitor wortmannin did not reverse GE antilipolysis, and GE did not affect phosphorylation of protein kinase B (PKB).
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9 |
17623817
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Conditions accelerating muscle proteolysis are frequently associated with defective phosphatidylinositol 3-kinase (PI3K)/Akt signaling and reduced PI3K-generated phosphatidylinositol 3,4,5-triphosphate (PIP(3)).
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10 |
18473907
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Moreover, some experiments have shown that low concentrations of estradiol, induce an increase in the rate of IRS-1 phosphorylation, promotes the association between IRS-1 and the subunit of PI3-k, p85alpha, causes a decrease in the rate of IRS-1 serine phosphorylation and increases the rate of Akt phosphorylation.
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11 |
18549351
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In accordance with this, inhibition of PI3K activity and, thereby, reduced phosphorylation of Akt was shown to enhance Pdcd4 expression.
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12 |
19114996
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Because insulin resistance is characterized by a marked reduction in insulin-stimulated PI3K-mediated activation of Akt, we asked whether MES could increase Akt phosphorylation and ameliorate insulin resistance.
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13 |
20573722
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Glucagon secretion, insulin and IGF-IR autophosphorylation, and insulin receptor substrate (IRS)-1, IRS-2, phosphatidylinositol kinase (PI3K) (p85 alpha), and serine-threonine protein kinase (Akt) phosphorylated (active) forms were measured.
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14 |
20816670
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On molecular assay, 8-OHdG antagonized the action of GTP on Rac, a small GTP binding protein, without affecting Rac-guanosine exchange factor (GEF) or phosphoinositide 3-kinases (PI3K) activity.
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15 |
21047779
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We show that inhibition of Gsk-3 by phosphatidylinositol 3-kinase (PI3K)-mediated activation of Akt also results in reduced DNA methylation at these imprinted loci.
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16 |
21186102
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It has been recently shown that nephrin once phosphorilated associates with PI3K and stimulates the Akt dependent signaling.
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17 |
21194385
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Inhibition of the phosphatidylinositol 3-kinase (PI3-K) pathway during insulin pretreatment restored acute insulin-mediated Akt phosphorylation.
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18 |
15671479
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Indeed, studies of beta cells have demonstrated that activation of a GPCR for the blood glucose-lowering hormone GLP-1 leads to major alterations of IRS-2, PI3K, and PKB activity.
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19 |
17908558
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It is widely accepted that phosphatidylinositol 3-kinase (PI3K) signaling to Akt1 is required for physiological cardiac growth.
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20 |
17908558
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We also show that activation of the downstream kinase Akt is not required for the mitochondrial adaptations that are secondary to PI3K activation.
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21 |
17908558
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Although PI3K signaling to Akt1 is required for cellular growth, Akt-independent pathways mediate the accompanying mitochondrial adaptations.
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22 |
15964918
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Apoptosis increased significantly in HUVEC exposed to 40 mM d-glucose. d-Glucose at 40 mM significantly decreased tyrosine-phosphorylated PI3k, threonine 308-phosphorylated-Akt, and Akt activity relative to control 5 mM d-glucose.
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23 |
19139117
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The phosphatidylinositol 3-kinase (PI3K)/Akt signaling cascade is an important component of the insulin signaling in normal tissues leading to glucose uptake and homeostasis and for cell survival signaling in cancer cells.
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24 |
20197055
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Thus, deletion of p110alpha in liver results in markedly blunted insulin signaling with decreased generation of PIP(3) and loss of insulin activation of Akt, defects that could not be rescued by overexpression of p110beta.
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25 |
21478266
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Inhibition of phosphoinositide 3 kinase (PI3K) activity, but not AKT, diminished both basal and TGF-?1-mediated monocyte motility.
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26 |
21861178
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Non-cytotoxic MGO concentrations inhibited insulin-induced IRS tyrosine phosphorylation and phosphatidylinositol 3-kinase (PI3K)/protein kinase B (PKB) pathway activation independently from reactive oxygen species (ROS) production.
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27 |
22026163
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Furthermore, the PI3K inhibitor LY294002 significantly abolished the anti-apoptotic effect of ibrolipim, and decreased Akt phosphorylation.
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28 |
18803692
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Using an experimental model of retinal ischemia induced by transiently raise the intraocular pressure (IOP), In this study, we report the original observation that ischemic retinal ganglion cells death is associated with the transient deactivation of the pro-survival kinase Akt and activation of GSK-3beta followed, during reperfusion, by a longer lasting, PI3K-dependent, activation of Akt and phosphorylation of GSK-3beta.
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29 |
19292965
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The level of PI-3K and PKB and phosphorylated PKB-Ser473 expression decreased in the liver of IUGR rats, whereas the levels of GSK-3beta protein increased.
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30 |
21521159
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A key downstream target of the Ras family is phosphoinositide 3-kinase (PI3K), the enzyme responsible for generation of 3-phosphorylated phosphoinositides and activation of Akt (Protein Kinase B/Akt).
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