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雌、孕激素对无能为力势雌大鼠血清NO、心肌NOS活性的影响 被引量:1

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摘要 [目的]通过观测单纯补充雌激素,孕激素和雌孕激素联合治疗对去卵巢雌大鼠(去势大鼠)血清一氧化氮(NO0和心肌一氧化氮合酶(NOS)活性的影响,探讨雌激素保护绝经后妇女心血管系统的作用机制。[方法]采用放射免疫法检测各组血清雌二醇(E2)和孕酮(P)水平,用化学比色法测定血清NO和心肌NOS活性。[结果]血清E2水平和E2/P比值与血清NO水平和心肌NOS活性正相关,去势雌鼠16周后,随着血清E2/P水平和E2/P比值的下降,血清NO水平和心肌NOS活性降低;单纯补充孕激素和联合使用5雌孕激素时,E2/P比值低,血清NO水平和心肌NOS活性低;单纯补充雌激素可提高血清NO水平和心肌NOS活性。[结论]雌激素保护女性心血管系统的作用机制可能与提高NOS活性,增加NO释放量或合成量的作用有关,孕激素可能削弱雌激素的作用;雌激素水平下降和雌孕激素比例失衡可能都是绝经后妇女冠心病发病率升高的原因。
出处 《医学临床研究》 CAS 2002年第3期200-203,共4页 Journal of Clinical Research
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