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PMID |
Sentence |
1 |
10976915
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The decrease observed in MBS phosphorylation was due to insulin-induced inhibition of Rho kinase activity.
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2 |
10976915
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Insulin also prevented a thrombin-mediated increase in Rho kinase activation and abolished the thrombin-induced increase in MBS phosphorylation and MBP inactivation.
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3 |
10976915
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These data are consistent with the notion that insulin inactivates Rho kinase and decreases MBS phosphorylation to activate MBP in VSMCs.
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4 |
11509551
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Our laboratory has recently demonstrated that insulin induces relaxation of vascular smooth muscle cells (VSMCs) by activating myosin-bound phosphatase (MBP) and by inhibiting Rho kinase (Begum N, Duddy N, Sandu OA, Reinzie J, and Ragolia L.
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5 |
11509551
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In this study, we tested the hypothesis that insulin via the nitric oxide (NO)/cGMP pathway may inactivate Rho, resulting in a decrease in phosphorylation of the myosin-bound subunit (MBS(Thr695)) of MBP and in its activation.
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6 |
11509551
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Treatment of confluent serum-starved VSMCs with insulin prevented thrombin-induced increases in membrane-associated RhoA, Rho kinase activation, and site-specific phosphorylation of MBS(Thr695) of MBP and caused MBP activation.
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7 |
11509551
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In contrast, 8-bromo-cGMP, a cGMP agonist, mimicked insulin's inhibitory effects by abolishing thrombin-mediated Rho signaling and promoted dephosphorylation of MBS(Thr695).
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8 |
11509551
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Collectively, these results indicate that insulin inhibits Rho signaling by decreasing RhoA translocation via the NO/cGMP signaling pathway to cause MBP activation via site-specific dephosphorylation of its regulatory subunit MBS.
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9 |
11739394
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In contrast, expression of dominant negative RhoA or cGMP-dependent protein kinase type I alpha inactivates Rho kinase, abolishes ROK-alpha/IRS-1 association, and potentiates insulin-induced tyrosine phosphorylation and PI3-kinase activation leading to decreased MBS(T695) phosphorylation and decreased MBP inhibition.
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10 |
17287471
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ARHGEF11, which encodes the Rho guanine nucleotide exchange factor 11, was analyzed as a positional candidate gene for this linkage because this protein may stimulate Rho-dependent signals, such as the insulin signaling cascade.
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11 |
19276091
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Rho-kinase (ROCK) isoforms have been shown to participate in insulin signaling and glucose metabolism in cultured cell lines.
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12 |
16996478
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In addition, to examine the functional role of Rho/Rho-kinase in beta-cells, we evaluated the effect of Rho-kinase inhibitors on insulin biosynthesis.
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13 |
16996478
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Northern blot analysis showed that insulin mRNA levels were markedly increased by Rho-kinase inhibitors, Y-27632 and fasudil, in beta-cell-derived HIT-T15 cells.
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