摘要
目的 分析不同发育阶段广州管圆线虫抗原差异 ,筛选优势诊断抗原分子。 方法 对不同发育阶段的广州管圆线虫的虫体蛋白进行十二烷基磺酸钠 聚丙烯酰胺凝胶电泳 (SDS PAGE)和免疫印迹分析。 结果 不同发育阶段的虫体蛋白质谱大致相同 ,SDS PAGE中出现的少数差异带在免疫印迹试验 (Westernblotting)中无明显差异。各期虫体抗原相对分子质量为Mr 40 0 0 0、 5 0 0 0 0、 660 0 0和 80 0 0 0的 ,与感染大鼠和正常大鼠血清均出现反应条带。 2～ 3周幼虫Mr 10 40 0 0与 2周感染血清出现明显反应条带。雌虫Mr 3 3 0 0 0及所有虫体的Mr 3 2 0 0 0抗原与感染后 2周血清出现反应条带 ,与感染 3周～ 5月的大鼠血清均出现明显反应 ,与正常大鼠血清均无明显反应。 结论 Mr 40 0 0 0、 5 0 0 0 0、 660 0 0和 80 0 0 0抗原可能在以虫体粗抗原作探针的免疫诊断中引起非特异性反应。幼虫Mr 10 40 0 0、雌虫Mr 3 3 0 0 0和所有虫体的Mr 3 2 0 0 0可作为广州管圆线虫病早期诊断和流行病学调查的候选抗原分子。
Objective To analyze the difference among antigens of Angiostrongylus cantonensis in different developmental stages and identify dominant diagnostic antigen for angiostrongyliasis. Methods Antigens of A.cantonensis in different developmental stages were analyzed by SDS-PAGE and immunoblot. Results The protein bands of all developmental stages were similar on SDS-PAGE. The Mr 40 000 , 50 000 , 66 000 and 80 000 antigens reacted not only with the sera of rats infected by A.cantonensis but also with the sera of normal rats. The Mr 104 000 antigen could be discerned by sera of rats infected with A.cantonensis for 2 weeks. The Mr 32 000 antigen could be recognized by sera of rats 2 weeks after infection, and the reaction became stronger with the infection continued. Conclusion The Mr 40 000 , 50 000 , 66 000 and 80 000 antigens might result in the unspecific reaction in the immunodiagnosis of angiostrongyliasis using the crude antigen of A.cantonensis. The Mr 104 000 of larva, Mr 33 000 of adult females and Mr 32 000 of the worms might be used as candidate antigens in early diagnosis and epidemiological survey of angiostrongyliasis.
出处
《中国寄生虫学与寄生虫病杂志》
CAS
CSCD
北大核心
2005年第1期36-39,共4页
Chinese Journal of Parasitology and Parasitic Diseases
基金
国家科技部十五重大科技攻关项目 (2 0 0 3BA71 2A0 3 0 7)~~
