中国寄生虫学与寄生虫病杂志 ›› 2005, Vol. 23 ›› Issue (1): 9-39.

• 论著 • 上一篇    下一篇

不同发育阶段广州管圆线虫的抗原分析

李华1,陈晓光1*,沈浩贤2,彭鸿娟1,赵醒村1   

  1. 1 南方医科大学寄生虫学教研室,广州 510515;2 广州医学院病原生物学教研室,广州 510182
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-02-28 发布日期:2005-02-28

Antigen Analysis of Angiostrongylus cantonensis in Different Developmental Stages

LI Hua1;CHEN Xiao-guang1 *;SHEN Hao-xian2;PENG Hong-juan1;ZHAO Xing-cun1   

  1. Department of Parasitology,Southern Medical University,Guangzhou 510515,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2005-02-28 Published:2005-02-28

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 40 000、50 000、 66 000和 80 000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 104 000与 2周感染血清出现明显反应条带。雌虫Mr 33 000及所有虫体的Mr 32 000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 40 000、50 000、66 000和80 000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 104 000、雌虫Mr 33 000和所有虫体的Mr 32 000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。

关键词: 广州管圆线虫, 抗原, 免疫诊断

Abstract:

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.

Key words: Angiostrongylus cantonensis, Antigen, Immunodiagnosis