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- W47442887 abstract "Vascular smooth muscle cells (SMCs) generate carbon monoxide (CO) from the degradation of heme by the enzyme heme oxygenase. Because recent studies indicate that CO influences the properties of vascular SMCs, we examined whether this diatomic gas regulates apoptosis in vascular SMCs. Treatment of cultured rat aortic SMCs with a cytokine cocktail consisting of interleukin-1β (5 ng/ml), tumor necrosis factor-α (20 ng/ml), and interferon-γ (200 U/ml) for 48 hr stimulated apoptosis, as demonstrated by DNA laddering, caspase-3 activation, and annexin V staining. However, the exogenous addition of CO (200 ppm) completely blocked cytokine-mediated apoptosis. The antiapoptotic action of CO was partially reversed by the soluble guanylate cyclase inhibitor, H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one (10 μM). In contrast, the p38 mitogen-activated protein kinase inhibitor, SB203580 (10 μM), had no effect on SMC apoptosis. These findings indicate that CO is a potent inhibitor of vascular SMC apoptosis and that it blocks apoptosis, in part, by activating the cGMP signaling pathway. The ability of CO to inhibit vascular SMC apoptosis may play a critical role in attenuating lesion formation at sites of arterial damage." @default.
- W47442887 created "2016-06-24" @default.
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- W47442887 date "2003-05-01" @default.
- W47442887 modified "2023-10-18" @default.
- W47442887 title "Antiapoptotic Action of Carbon Monoxide on Cultured Vascular Smooth Muscle Cells" @default.
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- W47442887 doi "https://doi.org/10.1177/15353702-0322805-30" @default.
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