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| 1 | 纤溶酶原激活因子及其抑制因子在溶黄体过程中的作用显示文摘纤溶酶原激活因子(plasminogen activator, PA)系统所介导的细胞外基质的局部降解与许多生理和病理过程密切相关,如排卵、胚胎发生、胚泡着床、乳腺退化、纤蛋白溶解、血管生成、炎症以及肿瘤转移等.PA系统是一种激素依赖性多功能蛋白水解酶系.在此酶系中,纤溶酶原可被组织型或尿激酶型纤溶酶原激活因子(tPA或uPA)激活,并受Ⅰ型或Ⅱ型PA抑制因子(PAI-1或 2)的调节.大量实验结果表明,卵泡颗粒细胞合成的 tPA和膜-间质细胞合成的PAI-1在激素诱导下的时间和空间上的协同表达导致卵泡破裂,引起排卵,排卵后,颗粒细胞和膜-间质细胞转化为黄体,黄体是一种暂时性的内分泌器官,分泌维持妊娠所必需的孕酮(P_0).黄体在形成和退化过程中涉及一系列剧烈的形态和生化变化,如血管生成、组织转化和退化等.这些过程都涉及蛋白水解作用.目前人们对PA在黄体各生理阶段所起的作用知之甚少,本文综述了近年来我们在这方面的某些研究成果. | 刘以训 陈毅军 冯强 胡召元 | 1997 | 科学通报1997，42，19： | 1 |
| 2 | Role of plasminogen activator and plasminogen activator inhibitor type-1 in luteolysis——a minireview显示文摘This minireview summarized our recent studies on the role of plasminogen activator (PA) and inhibitor type-1 (PAI-1) in luteolysis. We have demonstrated that (1) both tissue type and urokinase type plasminogen activators (tPA and uPA) and a plasminogen activator inhibitor type-1 (PAI-1) were present in the corpus luteum of rat and rhesus monkey; (2) decrease in progesterone production in corpus luteum was well correlated with a sharp increase in tPA (but not uPA) and PAI-1 secretion; (3) exogenous tPA decreased luteal progesterone synthesis while monoclonal antibodies increased progesterone production; (4) interferon y inhibited luteal progesterone synthesis and stimulated tPA production while LH plus pro-lactin increased progesterone production and decreased tPA (but not uPA) activity in cultured luteal cells; (5) increase in proteolysis in the corpus luteum was also correlated with decrease in progesterone production in mouse. These data suggest that local degradation of extracellular matrix | Liu, YX Chen, YJ Feng, QA Hu, ZY | 1997 | Chinese Science Bulletin1997，42，23： | 0 |
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