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捕鸟蛛毒素的结构与功能研究

【作者】 彭宽

【导师】 梁宋平; 谢锦云; 陈湘定;

【作者基本信息】 湖南师范大学 , 生物化学, 2001, 硕士

【摘要】 虎纹捕鸟蛛毒素HWTX-Ⅰ(5×10-6g/ml)对电刺激豚鼠回肠引起的一过性收缩有非常明显的抑制作用。HWTX-Ⅰ的抑制作用作用发生后,ACh诱发回肠的收缩幅度与使用HWTX-Ⅰ前无明显差异。在使用酚妥拉明后,HWTX-Ⅰ仍能引起豚鼠回肠的一过性收缩抑制。HWTX-Ⅰ对豚鼠回肠的抑制作用主要是抑制ACh释放或影响ACh释放之前的过程。

【Abstract】 The contraction of isolated guinea pig ileum induced by electrical stimulus can be inhibited by HWTX-I,a toxin purified from the Chinese bird spider Sclcnocosmia huwenn. While being blocked , the ileum has almost the same contracting amplitude at certain concentration of ACh as that before adding HWTX-I. Phcnlolamine can not change the inhibi t ton effect of HWTX-I on guinea pig ileum. So it seems that the inhibition effect of HWTX-I on guinea pig ileum might be due to blocking the releasing of ACh or affecting the process before the releasing of ACh.

【关键词】 HWTX-I递质释放神经毒素M受体
【Key words】 HWTX-Itransmitter releasingneurotoxinmAChR
  • 【分类号】Q51
  • 【被引频次】4
  • 【下载频次】84
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