A fused hirudin peptide was designed, synthesized and purified and its antithrombin and antiplatelet functions were *** bifunctional anticoagulation peptide was composed of three inhibitory regions: (1)the tail of hir...
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A fused hirudin peptide was designed, synthesized and purified and its antithrombin and antiplatelet functions were *** bifunctional anticoagulation peptide was composed of three inhibitory regions: (1)the tail of hirudin (hirudin 53-64 ), a potent direct antithrombin , binds to the anion binding exosite (ABE) of *** 53-64 blocks fibrinogen recognition site of thrombin and consequently inhibits thrombin directly;(2) Arg -Pro -Pro -Gly - Phe (RPPGF) amino acid sequence, a metabolite of bradykinin,binds to the active site of thrombin and thereby inhibits the amidolytic activity of thrombin;(3)Arg-Gly-Asp(RGD)amino acid sequence, an inhibitor of GP IIb/IIIa, blocks the final path of platelets aggregation by preventing fibrinogen binding to platelets. This 26 amino acid fused hirudin peptide was artificially synthesized, purified and *** study finally showed that the fused hirudin peptide had activities of antithrombin and antiplatelet. It is feasible to construct a hybrid multifunctional peptide that targets various components of haemostatic process.
以400 m g/kg 2次腹腔注射硫代乙酰胺(TAA)建立大鼠急性肝损伤模型,并在注射TAA前1 h以80 m g/kg 2次腹腔注射鲨鱼肝蛋白粗提物进行预防,研究了鲨鱼肝蛋白粗提物对大鼠肝线粒体抗氧化功能的影响。注射TAA后,大鼠肝脏线粒体腺苷二磷酸(A...
详细信息
以400 m g/kg 2次腹腔注射硫代乙酰胺(TAA)建立大鼠急性肝损伤模型,并在注射TAA前1 h以80 m g/kg 2次腹腔注射鲨鱼肝蛋白粗提物进行预防,研究了鲨鱼肝蛋白粗提物对大鼠肝线粒体抗氧化功能的影响。注射TAA后,大鼠肝脏线粒体腺苷二磷酸(ADP)诱导的氧消耗、呼吸控制率(RCR)、磷/氧比(P/O)、氧化磷酸化率均低于对照组,而预防组线粒体ADP诱导的氧消耗、呼吸控制率、P/O和氧化磷酸化效率均高于模型组;TAA降低了线粒体中谷胱甘肽、谷胱甘肽还原酶、谷胱甘肽过氧化物酶的水平,而鲨鱼肝蛋白粗提物则使线粒体中谷胱甘肽过氧化物酶和超氧化物歧化酶的水平明显升高,说明鲨鱼肝蛋白粗提物能部分修复线粒体受损的呼吸功能,增强线粒体抗氧化能力。
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