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PMID |
Sentence |
1 |
21926268
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In endothelial cells, APPL1 potentiated insulin-stimulated Akt activation by competing with the Akt inhibitor Tribbles 3 (TRB3) and suppressed ERK1/2 signaling by altering the phosphorylation status of its upstream kinase Raf-1.
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2 |
11274179
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Dominant negative mutants of these proteins block activation of Raf-1 by nocodazole, but not by epidermal growth factor (EGF).
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3 |
11274179
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Collectively, our results indicate that 1) the zinc finger exerts an inhibitory effect on Raf-1 activation, probably by preventing phosphorylation of (338)SSYY(341); 2) such inhibition is first overcome by an unknown factor binding in place of Ras-GTP to the amino-terminal regulatory region in response to nocodazole; and 3) EGF and nocodazole utilize different kinases to phosphorylate Ser(338), an event crucial for Raf activation.
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4 |
12196513
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B-Raf, and not Raf-1, expression was increased in MCs transfected with Rap1b.
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5 |
12663469
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Collectively, our study indicates that a glucose-induced rise in [Ca(2+)](i) leads to cAMP-induced activation of PKA that acts downstream of Ras and upstream of the MAP/Erk kinase, MEK, to mediate Erk-1/2 phosphorylation via phosphorylation activation of Raf-1.
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6 |
15995848
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In these islets, the Rap-B-Raf signalling pathway was activated preferentially compared with Ras and Raf-1, and activated Rap and B-Raf mediated ERK stimulation in kinase assays in vitro.
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7 |
18202127
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Interestingly, inhibiting Raf-1 kinase blocked proliferation stimulated by low, but not high (superphysiological), insulin doses.
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8 |
18202127
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Overexpression of Raf-1 was sufficient to increase proliferation in the absence of insulin, whereas a dominant-negative Raf-1 reduced proliferation in the presence of 200-pm insulin.
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9 |
20630999
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GlyLDL significantly increased V-raf-1 murine leukemia viral oncogene homolog 1 (Raf-1) phosphorylation.
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10 |
20630999
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Treatment with Raf-1 inhibitor blocked glyLDL-induced increase of PAI-1 mRNA in EC.
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11 |
18514235
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Ras activation was quantified by Raf-1 binding assay, and the activation of the signaling proteins, Raf-1 and mitogen activated protein (MAP) kinase, by quantifying their gene transcripts (RTPCR) and/or by protein expression (western blot).
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12 |
20335317
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The pcDNA3.1-RSOR/MIOX transfectants had an increased NADH/NAD(+) ratio, PKC and TGF-beta activity, Raf1:Ras association, and p-ERK phosphorylation.
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13 |
18418065
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In particular, we highlight the emerging role for Raf-1 kinase in autocrine insulin signaling and beta-cell fate decisions.
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14 |
20071600
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Here, we investigated roles of protein farnesylation in the signaling steps involved in Raf-1/extracellular signal-related kinase (ERK1/2) signaling pathway in glucose-induced Rac1 activation and insulin secretion in the pancreatic beta-cell.
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15 |
20071600
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Pharmacologic inhibition of Raf-1 kinase using GW-5074 markedly reduced the stimulatory effects of glucose on ERK1/2 phosphorylation, Rac1 activation, and insulin secretion, suggesting that Raf-1 kinase activation may be upstream to ERK1/2 and Rac1 activation leading to glucose-induced insulin release.
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16 |
12647305
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Blocking of Raf-1 activity by expression of a dominant negative form of Raf-1 did not reduce the enhancing effect of MG on IGF-I-induced activation of ERK.
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17 |
21817126
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We have previously reported that insulin protects ? cells from apoptosis and promotes proliferation by activating Raf-1 signaling in cultured human islets, mouse islets, and MIN6 cells.
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18 |
21817126
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As Raf-1 activity is critical for basal apoptosis and insulin secretion in vitro, we hypothesized that Raf-1 may play an important role in glucose homeostasis in vivo.
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19 |
21817126
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RIPCre(+/+):Raf-1(flox/flox) mice had increased fasting blood glucose levels and impaired glucose tolerance but normal insulin tolerance compared to littermate controls.
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20 |
21817126
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This work provides the first direct evidence that Raf-1 signaling is essential for the regulation of basal insulin transcription and the supply of releasable insulin in vivo.
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