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PMID |
Sentence |
1 |
8196603
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Coexpression of IRS-1 or IRS-1F-895 with the insulin receptor was required for insulin-stimulated mitogenesis in 32-D cells, while expression of the insulin receptor alone was sufficient to mediate insulin-stimulated tyrosine phosphorylation of Shc and activation of p21ras and mitogen-activated protein (MAP) kinase.
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2 |
7543098
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Shc phosphorylation in cells following growth factor, insulin, cytokine, and lymphocyte receptor activation leads to its association with Grb2 and activation of Ras.
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3 |
7499194
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Phosphopeptide assays developed to compare PTB domain specificities show that the Shc PTB domain binds with highest affinity to psi XN beta 1 beta 2 pY motifs derived from middle T (mT), TrkA, ErbB4, or epidermal growth factor receptors (psi = hydrophobic, beta = beta-turn forming); the IRS-1 PTB domain does not bind with this motif.
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4 |
7499194
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In contrast, both the Shc and IRS-1 PTB domains bind psi psi psi XXN beta 1 beta 2pY sequences derived from insulin and interleukin 4 receptors, although specificities vary in detail.
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5 |
8910437
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This resulted in an increased association of IRS-1 with the p85 subunit of phosphatidylinositol 3-kinase, increased phosphatidylinositol 3-kinase activity in anti-IRS-1 immunoprecipitates, constitutive activation of p70 S6 protein kinase, and an increased association of Grb2 with Shc in the absence of ligand.
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6 |
8910437
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In addition, Grb2 association with Shc and activation of MAPK and the p70 S6 kinase were insensitive to insulin stimulation.
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7 |
8910437
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By contrast, association of Grb2 with Shc and activation of MAPK, but not the p70 S6 kinase, could be stimulated by epidermal growth factor or platelet-derived growth factor.
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8 |
9468528
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Insulin-like growth factor-I (IGF-I) receptors activate divergent signaling pathways by phosphorylating multiple cellular proteins, including insulin receptor substrate-1 (IRS-1) and the Shc proteins.
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9 |
9468528
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This study investigates the relationship between IGF-I receptor internalization and signaling via IRS-1 and Shc.
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10 |
9468528
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Low temperature (15 degrees C) decreased IGF-I receptor internalization and completely inhibited Shc phosphorylation.
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11 |
10764814
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Insulin binding to the insulin receptor (IR) triggers its autophosphorylation, resulting in phosphorylation of Shc and the downstream activation of p42/p44 extracellular signal-regulated kinase 1/2 mitogen-activated protein kinase (ERK1/2), which mediates insulin-induced proliferation in vascular smooth muscle cells (VSMC).
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12 |
10764814
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Insulin-induced phosphorylation of Shc was inhibited by TNFalpha in a similar pattern.
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13 |
10764814
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Thus, TNFalpha selectively interferes with insulin-induced mitogenic signaling by inhibiting the phosphorylation of Shc and the downstream activation of ERK1/2.
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14 |
12138086
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EGF increased the tyrosine phosphorylation of several proteins (the EGF receptor, insulin receptor substrate (IRS)-1, IRS-2, and Grb2-associated binder 1), whereas Shc and Gab2 were only weakly and inconsistently phosphorylated. p85, the regulatory subunit of phosphatidylinositol 3-kinase (PI 3-kinase), was also found to associate with all of these docking molecules, showing that EGF activated PI 3-kinase pools that were additional to those of insulin.
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15 |
12734206
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We report here that human melanoma M2 cells lacking FLNa expression exhibited normal insulin receptor (IR) signaling, whereas FLNa-expressing A7 cells were unable to elicit insulin-dependent Shc tyrosine phosphorylation and p42/44 MAPK activation despite no significant defect in IR-stimulated phosphorylation of insulin receptor substrate-1 or activation of the phosphatidylinositol 3-kinase/AKT cascade.
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16 |
12734206
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Insulin-dependent translocation of Shc, SOS1, and MAPK to lipid raft microdomains was markedly attenuated by FLNa expression.
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17 |
12970360
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HGA did not affect either insulin receptor kinase activity or insulin-induced Shc phosphorylation on tyrosine.
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18 |
15998704
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The aim of the present study was 2-fold: (1) to characterize the cardiovascular phenotype of p66Shc knockout mice (p66Shc(-/-)), and (2) to test the novel hypothesis that disrupting the p66Shc might protect the heart from the damaging action of elevated Ang II levels.
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19 |
15998704
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In p66Shc(+/+), infusion of a sub-pressor dose of Ang II (300 nmol/kg body weight [BW] daily for 28 days) caused left ventricular hypertrophy and apoptotic death of cardiomyocytes and endothelial cells.
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20 |
15998704
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Consistently, in vitro experiments showed that Ang II causes apoptotic death of cardiomyocytes isolated from p66Shc(+/+) hearts to a greater extent as compared with p66Shc(-/-) cardiomyocytes.
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21 |
15998704
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In perspective, p66Shc inhibition may be envisioned as a novel way to prevent the deleterious effects of Ang II on the heart.
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22 |
17652764
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Phosphorylation of the adaptor protein Shc (Src homology 2 domain containing) transforming protein 1) was increased in RECs grown in high glucose.
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23 |
17652764
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For Shc to be phosphorylated, it must be recruited to the cytoplasmic domain of the transmembrane protein SHPS-1 (SHP substrate-1).
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24 |
17652764
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Shc recruitment to SHPS-1 was increased when RECs were grown in high glucose.
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25 |
20689155
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Recent findings that the pro-aging and pro-oxidant molecule p66shc contributes to S6K activation by nutrients and promotes insulin resistance and diabetes in mice may provide an answer to the "ROS or TOR?"
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26 |
20624962
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Biochemical studies revealed that p66shc promotes the signal-inhibitory phosphorylation of the major insulin transducer IRS-1, by bridging IRS-1 and the mTOR effector p70S6 kinase, a molecule previously linked to obesity-induced insulin resistance.
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27 |
20624962
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Importantly, IRS-1 was strongly up-regulated in the adipose tissue of p66KO lepOb/Ob mice, confirming that effects of p66 on tissue responsiveness to insulin are largely mediated by this molecule.
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28 |
21778425
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Objective: In this study, we investigated the role of SIRT1, a class III histone deacetylase, in the regulation of p66Shc expression and hyperglycemia-induced endothelial dysfunction.
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29 |
21778425
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Knockdown of SIRT1 increased p66Shc expression and also increased the expression levels of plasminogen activator inhibitor-1 expression, but decreased manganese superoxide dismutase expression in high-glucose conditions.
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30 |
21778425
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However, knockdown of p66Shc significantly reversed the effects of SIRT1 knockdown.
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31 |
21778425
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Our findings indicate that repression of p66Shc expression by SIRT1 contributes to the protection of hyperglycemia-induced endothelial dysfunction.
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32 |
21893988
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ET-1 is a potent mitogen of mesangial cells and the ability of ET-1 to support mesangial cell proliferation is likely to be associated with both recruitment of cytoplasmic tyrosine kinases which activate the Shc-Sos-Ras-Raf-MEK-ERK signaling pathway and transactivation of the EGF receptor.
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33 |
21893988
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The guanine nucleotide exchange factor ?Pix and the adaptor protein p66(Shc) are important players in Akt-independent inactivation of FOXO3a transcription factor.
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34 |
16713446
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CCK stimulated an association of Lyn with PKC-delta, Shc, p125(FAK) and PYK2 as well as with their autophosphorylated forms, but not with Cbl, p85, p130(CAS) or ERK 1/2.
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