中国寄生虫学与寄生虫病杂志 ›› 1998, Vol. 16 ›› Issue (2): 6-104.

• 论著 • 上一篇    下一篇

日本血吸虫组织蛋白酶的研究

李雍龙1, 冯友仁1, Conor Caffrey 2, Andreas Ruppel2   

  1. 1同济医科大学寄生虫学教研室 2德国海德堡大学热带医学研究所
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1998-04-30 发布日期:1998-04-30

STUDIES ON CATHEPSINS IN SCHISTOSOMA JAPONICUM

Li Yonglong 1, Fen Youren 1, Conor Caffrey 2, Andreas Ruppel2   

  1. 1 Department of Parasitology, Tongji Medical University, Wuhan 430030 2 Institut fur Tropenhygiene, Universitat Heidelberg, Germany 69120
  • Received:1900-01-01 Revised:1900-01-01 Online:1998-04-30 Published:1998-04-30

摘要: 目的:鉴别日本血吸虫组织蛋白酶类型及其水解蛋白活性。方法:收集日本血吸虫成虫肠道排出物,用含精氨酰键的特异性人工合成底物识别排出物中组织蛋白酶的类型及活性。结果:成虫肠道排出物能降解组织蛋白酶B的特异性底物7-氨基-4-甲基香豆素(Z-Arg-Arg-AMC)和组织蛋白酶B及L的共同底物Z-Phe-Arg-AMC。组织蛋白酶L的抑制剂Z-Phe-Phe-CHN2能部分抑制排出物对Z-phe-Arg-AMC的降解作用。日本血吸虫组织蛋白酶B/L的最适pH为5.0-5.5。结论:日本血吸虫成虫排出物具有组织蛋白酶B和L样活性。

关键词: 日本血吸虫, 组织蛋白酶, 蛋白水解作用

Abstract: AIM:To identify the cathepsins in adult worms of Schistosoma japonicum and their proteolytic activities. METHODS: The vomitus from adult worms of S. japonicum was collected. The proteolytic activity of cathepsins in the vomitus was identified and measured using synthetic substrates with arginyl bonds. RESULTS: Specific synthetic substracts Z Arg Arg AMC (for cathepsin B) and Z Phe Arg AMC (for cathepsin B and L) were degraded by the vomitus. An inhibitor, Z Phe PheCHN 2 for cathepsin L , inhibited partialy the activity of
the vomitus to degrade Z-Phe-Arg-AMC. The optimal pH for cathep sin B/L is 5.0- 5.5.CONCLUSION: The vomitus of S. japonicum has cathepsin B-and L-like activity.

Key words: Schistosoma japonicum, cathepsins, proteolytic activity