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胰岛素对内皮细胞t-PA和PAI-1的影响

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摘要 目的本研究拟观察不同浓度胰岛素对人脐静脉内皮细胞组织型纤溶酶原激活物(t—PA)和纤溶酶原激活物抑制剂-1(PAI-1)的影响,并探讨其可能的机制。方法选用第4~6代HUVECs,接种于24孔培养板中。根据胰岛素浓度分为3组(0,200,2000mU/L),爿依培养时间分为2个亚组(48小时、96小时)。每亚组6份标本。采用ELISA法测定上清液t—PA和PAI-1的抗原浓度,并用细胞内总蛋白进行标化(单位:ng/μg proteins)。同时测定细胞内Ca2+浓度(nmol/L)。结果与0的胰岛素相比,200mU/L和2000mU/L的胰岛素都能使t—PA浓度降低,PAI-1浓度增高,t—PA/PAI-1比值显著降低,Ca2+浓度显著增加。并且,随昔胰岛素浓度的增大和胰岛素作用时间的延长,以上差异越显著。结论一定浓度的胰岛素能损害内皮细胞的纤溶功能,细胞内钙离子在此可能起调节作用。
出处 《中国老年保健医学》 2014年第2期25-26,共2页 Chinese Journal of Geriatric Care
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