首页> 外文期刊>Infection and immunity >A partial cDNA clone of trypomastigote decay-accelerating factor (T-DAF), a developmentally regulated complement inhibitor of Trypanosoma cruzi, has genetic and functional similarities to the human complement inhibitor DAF.
【24h】

A partial cDNA clone of trypomastigote decay-accelerating factor (T-DAF), a developmentally regulated complement inhibitor of Trypanosoma cruzi, has genetic and functional similarities to the human complement inhibitor DAF.

机译:锥虫病减毒促进因子(T-DAF)的部分cDNA克隆是克氏锥虫的发育调控补体抑制剂,与人类补体抑制剂DAF具有遗传和功能相似性。

获取原文
           

摘要

Resistance to complement-mediated lysis in Trypanosoma cruzi is due to the expression of complement-regulatory factors by the virulent developmental forms of this protozoan parasite. An 87- to 93-kDa molecule, which we have termed T-DAF (trypomastigote decay-accelerating factor), is present on the surface of the parasite and inhibits complement activation in a manner functionally similar to the mammalian complement regulatory component, decay-accelerating factor. In this report, we characterized monospecific polyclonal and monoclonal antibodies which were obtained from mice and rabbits immunized with fast protein liquid chromatography-purified T-DAF. These polyclonal antibodies were shown to inhibit T-DAF activity and were capable of inducing lysis of the parasites. Both the polyclonal and monoclonal antibodies were used to screen a cDNA expression library prepared from T. cruzi trypomastigote mRNA. From this library, we obtained a partial lambda gt11 cDNA clone which showed genetic and functional similarity to the human C3 convertase inhibitor DAF (A. Nicholson-Weller, J. Burge, D. T. Fearon, P. F. Weller, and K. F. Austen, J. Immunol. 129:184-189, 1982).
机译:克氏锥虫对补体介导的裂解的抗性是由于这种原生动物寄生虫的有毒发育形式表达补体调节因子所致。寄生虫表面上存在一个87-93kDa的分子(我们称为T-DAF(胰杆鞭毛虫衰变加速因子)),其功能类似于哺乳动物补体调节成分,即衰变-加速因子。在本报告中,我们表征了从快速蛋白液相色谱纯化的T-DAF免疫的小鼠和兔子获得的单特异性多克隆和单克隆抗体。这些多克隆抗体显示出抑制T-DAF活性并能够诱导寄生虫裂解。多克隆抗体和单克隆抗体都用于筛选由克鲁氏锥虫锥虫基因mRNA制备的cDNA表达文库。从该文库中,我们获得了部分λgt11cDNA克隆,该克隆显示了与人C3转化酶抑制剂DAF(A.Nicholson-Weller,J.Burge,DT Fearon,PF Weller,and KF Austen,J.Immunol。 129:184-189,1982)。

著录项

相似文献

  • 外文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号