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小檗碱对脑缺血兔血浆血栓素B2和6-酮前列腺素F的影响

吴俊芳*, 刘天培   

  1. 南京医科大学药理教研室, 南京 210029
  • 收稿日期:1996-11-08 修回日期:1997-01-05 出版日期:1998-03-15 发布日期:1998-03-15
  • 通讯作者: 吴俊芳*

Effects of Berberine on TXB2 and 6-Keto-PGF Plasma Levels in Rabbits with Uncomplete Cerebral Ischemia

Jun-Fang Wu*, Tian-Pei Liu   

  1. Department of Pharmacology, Nanjing Medical University, Nanjing 210029
  • Received:1996-11-08 Revised:1997-01-05 Online:1998-03-15 Published:1998-03-15
  • Contact: Jun-Fang Wu*

摘要: 双侧颈总动脉及左侧椎动脉结扎造成兔不完全性脑缺血。Ber在体外能显著抑制胶原, ADPAA诱导的脑缺血兔血小板聚集, IC50分别为0.15, 0.460.51 mg·mL-1。兔脑缺血30 min, iv Ber 5 mg·kg-1能使胶原诱导的血小板聚集程度降低; iv Ber 25, 50 mg·kg-1, 90 min, 可使胶原、ADPAA诱导的血小板聚集程度明显降低。Ber能显著降低脑缺血兔TXB2的血浆水平, 6-酮前列腺素F变化不明显。提示Ber致血浆血栓素B2水平下降是其抗脑缺血作用机制之一。

关键词: 小檗碱, 脑缺血, 血栓素B2, 6-酮前列腺素F1α, 血小板聚集

Abstract: Effects of berberine (Ber) on platelet aggregation and TXB2 and 6-keto-PGF1a plasma levels were studied in rabbits with uncomplete cerebral ischemia. Ber inhibited uncomplete cerebral ischemic rabbit platelet aggregation triggered by collagen, ADP, and arachidonic acid (AA) with the IC50 of 0.15, 0.46, and 0.51 mg·ml-1, respectively. In rabbits, Ber 25, or 50 mg·kg-1 iv 30 min after uncomplete cerebral ischemia, restrained the collagen ADP- and AA- induced platelet aggregation determined 90 min later. With radioimmunoassay, we measured the thromboxane B2 (TXB2) and 6-ketoprostaglandin F (6-keto-PGF) contents in rabbit plasma. The results indicated that the TXB2 level in rabbit 120 min after uncomplete cerebral ischemia (921±539 pg·mL-1) was higher than that (230±71 pg·mL-1) in normal rabbits (P <0.01), but 6-keto-PGF level after ischemia (73±23 pg·ml-1) was lower than that (262±988 pg·ml-1) in normal rabbit. Ber (5, 25 or 50 mg·kg-1) reduced obviously the plasma TXB2 level in rabbit with uncomplete cerebral ischemia (504±196, 386±174, or 272±183 vs 921±539 pg·ml-1, respectively, P<0.01). We conclude that the decrease of TXB2 content is one of the possible mechanisms of Ber anti-cerebral ischemic effect

Key words: Berberine, Cerebral ischemia, Platelet aggregation, Thromboxane B2, 6-Ketoprostaglandin F1 alpha

Supporting: *Present Address: Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050