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PMID |
Sentence |
1 |
1380182
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Thus, rapamycin inhibits a signal transduction element that is necessary for the activation of p70 S6 kinase and mitogenesis but unnecessary for activation of p85 Rsk S6 kinase or MAP kinase.
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2 |
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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3 |
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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4 |
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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5 |
9854185
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Neither basal nor insulin-stimulated p70(S6K) activity, a signalling element lying downstream of mTOR, were modified by STZ-diabetes.
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6 |
11916914
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Phosphorylation of p70(S6K) was also increased by IGF-1/glucose, but not by TGF-alpha/EGF, despite upstream PKB activation.
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7 |
11991199
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PDGF also stimulated phosphorylation of protein kinase B (Akt/PKB) and p70 S6Kinase (p70S6K) in a wortmannin-sensitive manner.
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8 |
11978789
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The prosurvival effects of GLP-2 on LY294002-induced cell death were independent of Akt, p90(Rsk), or p70 S6 kinase activation; were mimicked by forskolin; and were abrogated by inhibition of protein kinase A (PKA) activity.
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9 |
12118006
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EGCG also mimics insulin by increasing phosphoinositide 3-kinase, mitogen-activated protein kinase, and p70(s6k) activity.
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10 |
12663469
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However, the signaling mechanism by which glucose induces Erk-1/2 and p70(S6K) phosphorylation activation is undefined.
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11 |
12663469
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Increased glucose metabolism increases [Ca(2+)](i) and [cAMP], and it was investigated if these secondary signals were linked to glucose-induced Erk-1/2 and p70(S6K) activation in pancreatic beta-cells.
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12 |
12663469
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In contrast, glucose-induced p70(S6K) activation, in the same beta-cells, was mediated by a distinct signaling pathway independent of Ca(2+)/cAMP, most likely via mTOR-kinase acting as an "ATP-sensor."
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13 |
14555183
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Thus, angiotensin II induces the phosphorylation of 4E-BP1 via the PI 3-kinase/mTOR pathway, but not via ERK or p70 S6 kinase.
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14 |
14560955
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At a molecular level, this dual control of p70 S6K activity is attributable to phosphorylation of the two p70 S6K sites: The Ptd Ins 3,4,5P3-dependent kinasel (PDK1) phosphorylates p70 S6K at a Thr on the activation loop, whereas mTOR phosphorylates a Thr located in a hydrophobic motif carboxyterminal to the catalytic domain.
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15 |
16180585
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We have examined the basal and insulin-mediated phosphorylation of protein kinase B (PKB), protein kinase Czeta (PKCzeta), p70(S6k), mitogen-activated protein kinase (MAPK)/p90(rsk) pathway and the expression of IGFBP-3, -4, and -5 in mice selected for body weight gain (line C) and reduction (line L).
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16 |
16180585
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Neither protein level nor insulin-stimulated p70(S6k) activation were modified by STZ-diabetes.
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17 |
16186396
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TNF-alpha infusion increases phosphorylation of p70 S6 kinase, extracellular signal-regulated kinase-1/2, and c-Jun NH(2)-terminal kinase, concomitant with increased serine and reduced tyrosine phosphorylation of insulin receptor substrate-1.
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18 |
16962100
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Akt, mammalian target of rapamycin (mTOR), ribosomal-S6 kinase (p70(S6K)), the eukaryotic translation initiation factor 4E (eIF4E)-binding protein 1 (4E-BP1) and insulin receptor substrate (IRS)-2 were evaluated by Western blot analysis.
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19 |
16962100
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Rapamycin, which inhibits mTOR leading to inactivation of p70(S6K), did not affect acetaldehyde-induced inhibition on phosphorylation of Akt and mTOR.
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20 |
16962100
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Interestingly, acetaldehyde enhanced p70(S6K) activation and depressed 4E-BP1 phosphorylation, the effect of which was blunted and exaggerated, respectively, by rapamycin.
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21 |
16962100
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Collectively, these data suggested that acetaldehyde did not adversely affect glucose uptake despite inhibition of insulin signaling cascade at the levels of Akt and mTOR, possibly due to presence of certain mechanism(s) responsible for enhanced p70(S6K) phosphorylation.
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22 |
17063460
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While the early actions of FGF-21 on 3T3-L1 adipocytes involve rapid accumulation of intracellular calcium and phosphorylation of Akt, GSK-3, p70(S6K), SHP-2, MEK1/2, and Stat3, continuous treatment for 72 h induces an increase in PPARgamma protein expression.
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23 |
17459944
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In addition, insulin treatment promoted the formation of large, elongate ASM cells, characterized by dramatic accumulation of contractile phenotype marker proteins and phosphorylated p70(S6K) (downstream target of PI 3-kinase associated with ASM maturation).
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24 |
17971514
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The insulin-induced glucose uptake was enhanced by berberine in the absence of change in IRS-1 (Ser307/312), Akt, p70 S6, and ERK phosphorylation.
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25 |
18347057
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PDK1 activates a group of kinases, including protein kinase B (PKB)/Akt, p70 ribosomal S6 kinase (S6K), and serum and glucocorticoid-induced protein kinase (SGK), that mediate many of the effects of insulin as well as other agonists.
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26 |
19533653
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Therefore, the aim of this study was to determine whether there was an increase in catabolic signaling targets, such as atrogin-1, muscle ring finger-1 (MuRF1), forkhead transcription factor (FoXO), and myostatin, and decreases in anabolic signaling targets, such as insulin-like growth factor (IGF), v-akt murine thymoma viral oncogene (Akt), glycogen synthase kinase-beta (GSK-3beta), mammalian target of rapamycin (mTOR), eukaryotic initiation factor 4E binding protein 1 (4E-BP1), and p70(s6kinase) in chronic complete SCI patients.
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27 |
21289241
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GDM women had decreased skeletal muscle insulin-stimulated insulin receptor and insulin receptor substrate 1 (IRS1) tyrosine activation and reduced IRS1, concomitant with increased basal IRS1 serine phosphorylation and basal p70 S6-kinase (S6K1) activation, which resolved postpartum.
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28 |
20299475
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The mammalian target of rapamycin (mTOR)/p70 S6 kinase 1 (S6K1) pathway is a critical signaling component in the development of obesity-linked insulin resistance and operates a nutrient-sensing negative feedback loop toward the phosphatidylinositol 3-kinase (PI 3-kinase)/Akt pathway.
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29 |
17130506
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Glycosphingolipid inhibitors augmented insulin-stimulated p70 S6kinase activity in the presence of inhibitory concentrations of high glucose or glucosamine.
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30 |
21478152
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Resistin also stimulated the activation of p70(S6K), a downstream kinase target of mTOR, and increased phosphorylation of the IRS1 serine 636/639 residues, whereas treatment with rapamycin reduced the phosphorylation of these residues.
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31 |
21977024
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In conditions of over-nutrition, increased insulin (INS) and angiotensin II (Ang II) activate mammalian target for rapamycin (mTOR)/p70 S6 kinase (S6K1) signaling, whereas chronic alcohol consumption inhibits mTOR/S6K1 activation in cardiac tissue.
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32 |
14623899
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Replacing Ser(302) with alanine significantly reduced insulin-stimulated tyrosine phosphorylation of IRS-1 and p85 binding and reduced insulin-stimulated phosphorylation of p70(S6K), ribosomal S6 protein, and 4E-BP1; however, this mutation had no effect on insulin-stimulated Akt or glycogen synthase kinase 3beta phosphorylation.
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