光裸方格星虫纤溶酶SNFE的抗凝作用及机制研究
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篇名: 光裸方格星虫纤溶酶SNFE的抗凝作用及机制研究
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摘要: 目的:研究光裸方格星虫纤溶酶SNFE的抗凝作用及机制,为SNFE的进一步开发利用提供参考。方法:将40只小鼠随机分为空白对照组(生理盐水)、血栓通组(阳性对照,15 mg/kg)和SNFE低、高剂量组(15、30 mg/kg),每组10只,尾iv给药后分别测定断尾出血时间(BT)和凝血时间(CT),以考察SNFE的抗凝作用。大鼠腹主动脉取血后,将试验分为空白对照组、阳性对照组和SNFE低、中、高质量浓度组(0.25、0.50、1.00 mg/mL),分别测定体外血浆的凝血酶原时间(PT)和复钙时间(PRT)(以尿激酶为阳性药物,10万U/mL)及二磷酸腺苷(ADP)诱导剂作用下的血小板5 min内的最大聚集率(PAG)(以阿司匹林为阳性药物,0.50   mg/mL),以分析SNFE的抗凝作用机制。结果:与空白对照组比较,各给药组小鼠的BT、CT均延长,其中血栓通组和SNFE高剂量组差异有统计学意义(P<0.05或P<0.01);阳性对照组和SNFE中、高浓度组大鼠血浆PT及各给药组大鼠血浆PRT均显著延长(P<0.05或P<0.01);各给药组大鼠PAG均显著降低(P<0.01)。结论:光裸方格星虫纤溶酶SNFE可能通过抑制内、外源性凝血因子的活性及ADP诱导的血小板聚集而发挥抗凝作用。
ABSTRACT: OBJECTIVE: To study the anti-coagulation effect and mechanism of fibrinolytic enzyme SNFE in sipuculus nudus, and provide reference for further development of SNFE. METHODS: 40 mice were randomly divided into blank control group (normal saline), Xueshuantong group (positive control, 15 mg/kg) and SNFE low-dose, high-dose group (15, 30 mg/kg), 10 in each group. After intravenous injection in tail, tail bleeding time (BT) and clotting time (CT) were respectively determined to investigate the anti-coagulation effect of SNFE. After taking blood in abdominal aorta of rats, test was divided into blank control group, positive control group and SNFE low-mass concentration, medium-mass concentration, high-mass concentration groups (0.25, 0.50, 1.00 mg/mL). Prothrombin time (PT), re-calcium time (PRT) (using orokinase as positive drug, 100 000 U/mL), and maxmum platelet aggregation rate (PAG) in 5 min under adenosine diphosphate (ADP) inducer (using asprin as positive drug, 0.50 mg/mL) were respectively determined, and anti-coagulation effect mechanism of SNFE was analyzed. RESULTS: Compared with blank control group, BT, CT of mice in each group were prolonged, with statistical significance in Xueshuantong group and SNFE high-dose group (P<0.05 or P<0.01). Plasma PT of rats in positive control group, SNFE medium-dose, high-dose groups and PRT in each administration group were significantly prolonged (P<0.05 or P<0.01); and PAG in administration group was significantly reduced (P<0.01). CONCLUSIONS: The fibrinolytic enzyme SNFE in sipuculus nudus can play its anti-coagulant effect by inhibiting the activity of coagulation factors in internal and external sources and ADP-induced platelet aggregation.
期刊: 2017年第28卷第28期
作者: 李映新,黄晓亮,黄媛恒,班建东,庞丽君,黎钦蓉,雷丹青
AUTHORS: LI Yingxin,HUANG Xiaoliang,HUANG Yuanheng,BAN Jiandong,PANG Lijun,LI Qinrong,LEI Danqing
关键字: 光裸方格星虫;纤溶酶;抗凝作用;血小板聚集
KEYWORDS: Sipuculus nudus; Fibrinolytic enzyme; Anti-coagulation effect; Platelet aggregation
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