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首页> 外文期刊>European Journal of Pharmacology: An International Journal >Inhibition by docosahexaenoic acid of receptor-mediated Ca(2+) influx in rat vascular smooth muscle cells stimulated with 5-hydroxytryptamine.
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Inhibition by docosahexaenoic acid of receptor-mediated Ca(2+) influx in rat vascular smooth muscle cells stimulated with 5-hydroxytryptamine.

机译:二十二碳六烯酸对受体介导的Ca(2+)内流在5-羟色胺刺激的大鼠血管平滑肌细胞中的抑制作用。

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摘要

The effect of docosahexaenoic acid treatment on intracellular Ca(2+) dynamics in rat vascular smooth muscle cells stimulated with 5-hydroxytryptamine (5-HT) has been investigated in order to elucidate one of the mechanisms for its beneficial effect on cardiovascular disorders. The treatment of cells with 30 microM docosahexaenoic acid for 2 days inhibited an increase in intracellular Ca(2+) concentration induced by 5-HT (10 microM) and a depolarizing concentration of KCl (80 mM). Docosahexaenoic acid treatment significantly inhibited divalent cation influx stimulated by 5-HT and KCl, as measured by Mn(2+) quenching method, whereas had no effect on 5-HT-induced Ca(2+) release from the internal stores. Docosahexaenoic acid treatment also significantly inhibited 5-HT receptor-mediated Ca(2+) influx through Ni(2+)-insensitive channels that were distinct from store-operated channels. These results suggest that the specific inhibition of intracellular Ca(2+) dynamics in vascular smooth muscle cells may contribute to the beneficial properties of docosahexaenoic acid on cardiovascular disorders.
机译:已研究了二十二碳六烯酸治疗对5-羟色胺(5-HT)刺激的大鼠血管平滑肌细胞内Ca(2+)动态的影响,以阐明其对心血管疾病有益作用的机制之一。用30 microM二十二碳六烯酸处理细胞2天抑制了5-HT(10 microM)和KCl的去极化浓度(80 mM)诱导的细胞内Ca(2+)浓度的增加。二十二碳六烯酸处理显着抑制了由5-HT和KCl刺激的二价阳离子流入,如通过Mn(2+)淬灭方法测得的,而对5-HT诱导的Ca(2+)从内部存储释放没有影响。二十二碳六烯酸处理还通过与存储操作通道不同的Ni(2+)不敏感通道显着抑制了5-HT受体介导的Ca(2+)流入。这些结果表明,血管平滑肌细胞中细胞内Ca(2+)动态的特异性抑制可能有助于二十二碳六烯酸对心血管疾病的有益作用。

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