中国寄生虫学与寄生虫病杂志 ›› 2002, Vol. 20 ›› Issue (1): 11-38.

• 论著 • 上一篇    下一篇

伯氏疟原虫青蒿素抗性系的培育研究

陈颖丹;林宝英;张家埙
  

  1. 中国疾病预防控制中心寄生虫病预防控制所;中国疾病预防控制中心寄生虫病预防控制所 世界卫生组织疟疾、血吸虫病和丝虫病合作中心;卫生部病原与媒介生物学重点实验室;上海200025
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-02-28 发布日期:2002-02-28

Study on Inducing an Artemisinin-resistant Line of Plasmodium berghei

CHEN Ying-dan;LIN Bao-ying;ZHANG Jia-xun;   

  1. Institute for Parasitic Disease Control and Prevention;Chinese Center for Disease Control and Prenention*;Shanghai 200025
  • Received:1900-01-01 Revised:1900-01-01 Online:2002-02-28 Published:2002-02-28

摘要:   目的 培育伯氏疟原虫青蒿素抗性系。 方法与结果 采用伯氏疟原虫接种传代和青蒿素剂量递增法分3条路线进行培育 :A线 ,青蒿素起始剂量为 12 6 .2 mg/kg相当于 1/2 ED50 ) ,递增剂量为 6 0 mg/kg,每隔 2代改为12 6 .2 mg/kg加强 1次。第 14、30、4 4及第 6 0代抗性指数 I50 )逐渐上升 ,分别为 4 .0 1、10 .11、16 .0 2及 18.93;至第76代 ,抗性减弱 ,I50 为 14 .89;至第 10 8代 ,剂量达 886 2 .5 mg/kg,I50 仅为 10 .4 9。B线 ,是从 A线第 6 6代转种而来 ,此后每周给药 1次 ,剂量为 4 0 0 0 mg/kg,至第 4 0代 I50 为 2 7.4 5 ,抗药性明显增强。C线 ,是从 B线第 19代转种而来 ,此后每周给药 1次 ,剂量为 2 0 0 0 mg/kg,至第 15代 ,I50 为 17.4 1。 结论 已培育出具有中度抗药性的伯氏疟原虫青蒿素抗性系

关键词: 伯氏疟原虫, 青蒿素, 抗药性

Abstract:  Objective To induce a line of Plasmodium berghei with resistance to artemisinin. Methods The major methods included blood transmission from passage to passage and progressive increase of drug pressure. Results The resistant lines were developed by different protocols: A) The initial dosage of artemisinin was 126.2 mg/kg which was increased by 60 mg/kg for the next passage and boosted by 126.2 mg/kg for every other passage. As developed to passage 60 and 76, the resistant index was 18.39∶1 and 14.89∶1 respectively, then decreased gradually. For passage 108, the dosage was 8 862.5 mg/kg, but the resistant index was only 10.49∶1. B) Using passage 66 from A) as the source, a dosage of 4 000 mg/kg was given each week, the resistance of the passage 40 increased significantly with an index of 27.5∶1. C) Using passage 19 of B) as the source, drug was administered at the dose of 2 000 mg/kg each week. The resistant index of passage 15 was 17.41∶1. Conclusion Line of P.berghei with medium level resistance to artemisinin was established.

Key words: Plasmodium berghei, artemisinin, drug-resistance