Title : IRS-1 mediates inhibition of Ca2+ mobilization by insulin via the inhibitory G-protein Gi.

Pub. Date : 2004 Jan 30

PMID : 14602724






3 Functional Relationships(s)
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1 Here we report that insulin (0.5-200 nmol/liter) interferes with agonist-induced increases in [Ca(2+)](i) (ADP, thrombin), cAMP suppression (thrombin), and aggregation (ADP). Cyclic AMP insulin Homo sapiens
2 The effects of insulin are as follows: (i) independent of the P2Y(12) receptor, which mediates ADP-induced cAMP lowering; (ii) not observed during G(s)-mediated cAMP formation; (iii) unaffected by treatments that affect phosphodiesterases (3-isobutyl-1-methylxanthine); and (iv) not changed by interfering with NO-mediated regulation of cAMP degradation (N(G)-monomethyl-l-arginine). Cyclic AMP insulin Homo sapiens
3 We conclude that insulin attenuates platelet functions by interfering with cAMP suppression through IRS-1 and G(i). Cyclic AMP insulin Homo sapiens