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Vibrio vulnificus hemolysin dilates rat thoracic aorta by activating guanylate cyclase.

机译:创伤弧菌溶血素通过激活鸟苷酸环化酶使大鼠胸主动脉扩张。

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摘要

Hemolysin produced by Vibrio vulnificus caused hypotension and tachycardia in rats and dilated rat thoracic aorta. Hemolysin-induced vasodilatation of the aorta was not affected by N omega-nitro-L-arginine methyl ester and aminoguanidine, NO synthase inhibitors, whereas the vasodilatation was inhibited by LY 83,583, a guanylate cyclase inhibitor. Hemolysin elevated cGMP levels, and the elevation was abolished by LY 83,583. These results suggest that V. vulnificus hemolysin activates guanylate cyclase independently of NO synthase, and the subsequent increase in cGMP levels results in vasodilatation.
机译:创伤弧菌产生的溶血素引起大鼠低血压和心动过速,并导致大鼠胸主动脉扩张。溶血素诱导的主动脉血管舒张不受Nω-硝基-L-精氨酸甲酯和氨基胍,NO合酶抑制剂的影响,而血管舒张则被鸟苷酸环化酶抑制剂LY 83,583抑制。溶血素升高cGMP水平,而LY 83,583取消了该升高。这些结果表明,V。vulnificus溶血素可独立于NO合酶激活鸟苷酸环化酶,随后cGMP水平的升高导致血管舒张。

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