旋毛虫肌幼虫特异性抗原的鉴定

目的 寻找诊断旋毛虫病的特异性抗原。方法 应用SDS—PAGE和Western blot对旋毛虫肌幼虫可溶性抗原中的蛋白组分进行研究。结果 旋毛虫肌幼虫可溶性抗原经SDS—PAGE后显示29条蛋白带，分子量范围在112—12kDa之间，其中65、43、42、31、30、20、17、16kDa为主带。112、110、108、102、97、95、65、63、58、55、53、49、45、43、42kDa蛋白组分与并殖吸虫感染的大鼠及患者血清、华支睾吸虫病、血吸虫病及囊尾蚴病患者血清均具有明显的交叉反应带；24—20kDa蛋白组分只与旋毛虫感染的大鼠、小鼠及患者血清反应，而不与其它寄生虫感染的动物或患者血清、正常大鼠和小鼠及正常人血清发生交叉反应。结论旋毛虫肌幼虫可溶性抗原中24—20kDa蛋白组分为旋毛虫肌幼虫的特异性抗原，可用于旋毛虫病的免疫学诊断及血清流行病学调杏。

IDENTIFICATION OF SPECIFIC ANTIGEN OF TRICHINELLA SPIRALIS MUSCLE LARVAE

Objective To find out the specific antigens for immunodiagnosis of trichinellosis. Methods The soluble antigens of Trichinella spiralis muscle larvae were analyzed by SDS-PAGE and Western blot. Results SDS-PAGE revealed that the soluble antigens of T. spiralis muscle larvae had 29 protein bands with molecular weight (MW) from 112 kDa to 12 kDa, among them the protein bands with MW 65,43,42,31,30,20,17,16 kDa were the major bands. Western blot results showed that the protein bands with 112,110,108, 102,97,95,65,63,58,55,53,49,45,43,42 kDa in T.spiralis muscle larval soluble antigens were cross-reacted with sera from rats and patients with paragonimiasis, sera from patients with clonorchiasis, schistosomiasis, and cys-ticercosis. The protein components with 24 - 20 kDa were only reacted with sera from rats, mice infected with T.spiralis and patients with trichinellosis, and not reacted with sera from animals and patients infected with other parasites,and sera from normal rats, mice and healthy persons. Conclusion The protein components with 24-20 kDa in T.spiralis muscle larval soluble antigens are the specific antigen for T.spiralis muscle larvae, it could be applied to the immunodiagnosis and seroepidemiological investigation on trichinellosis.