PMID: 7536712Apr 1, 1995Paper

cGMP upregulates nitric oxide synthase expression in vascular smooth muscle cells

Hypertension
T InoueT Ogihara

Abstract

8-Bromo-guanosine 3':5'-cyclic monophosphate (8-Br-cGMP), an analogue of cyclic guanosine monophosphate (cGMP), induced a time- and dose-dependent enhancement of interleukin-1-induced nitric oxide production in vascular smooth muscle cells. Human atrial natriuretic polypeptide, which stimulates cGMP accumulation in vascular smooth muscle cells, also enhanced interleukin-1-induced nitric oxide release at a concentration of 100 nmol/L. In contrast, coincubation with 10 mumol/L methylene blue, an inhibitor of soluble guanylate cyclase, inhibited interleukin-1-induced nitric oxide release from vascular smooth muscle cells. Furthermore, coincubation with 8-Br-cGMP also enhanced the interleukin-1-induced increase in inducible nitric oxide synthase messenger RNA in vascular smooth muscle cells. However, the enhancement of nitric oxide production induced by 8-Br-cGMP was significantly prevented by coincubation with neutralizing antibody against tumor necrosis factor-alpha. Furthermore, 8-Br-cGMP enhanced the interleukin-1-induced increase in tumor necrosis factor-alpha messenger RNA level in vascular smooth muscle cells. These findings indicate that cGMP may upregulate inducible nitric oxide synthase gene expression through the stimula...Continue Reading

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May 1, 1997·Disease-a-month : DM·R G KilbournC Szabó
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