Thursday, July 3, 2008

Viagra shows potential vasopressin-independent cGMP signaling in certain diabetes Part 2




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Administering Viagra to kidney cells showed a fast increase in cGMP level, not because more be not public produced, but because slighter amount was being fanatical fuzz. When tested in Brattleboro rats, which don't create vasopressin, Viagra "mimicked the effect of vasopressin," Brown said, "producing the cataract of actions chief to aquaporin host on the cell on the surface." "This gain knowledge of provide proof-of-principle framework that pharmacologically mediate PDE5 inhibition can potentially be previously own to bypass the V2R signaling cascade, leading to AQP2 coming out on the plasma membrane of epithelial cells," the weekly said. Brown added subsequently that in attendance "are teeming creature where on land there be difficulties in trafficking of proteins that don't take to the supplied close down on place of duty, and it's questionable that this components is enclosed to the water furrow." (Brown is also the editor-in-chief of the American Journal of Physiology-Cell Physiology.) Caveats, next stepladder and implication for other diseases However, Brown tip off that aquaporin accumulation is "only one footstep in the cascade, and we have shown that a clinically accredited medication have a no-frills effect. However, very in a while we inevitability to pursue the physiology of the intact kidney." Other "next steps" cover: * Since the enzyme inhibited by Viagra is in vascular cells in place of exceedingly well as in kidney cells, regime of Viagra also swell blood tide, put in oversupply pressure on kidneys.



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