中国寄生虫学与寄生虫病杂志 ›› 1998, Vol. 16 ›› Issue (5): 372-375.

• 论著 • 上一篇    下一篇

日本血吸虫再感染相关基因克隆的筛选与鉴定

吴海玮; 王荣芝; 陈淑贞; 苏川; 张兆松; 吴观陵   

  1. 南京医科大学分子寄生虫学研究室
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1998-10-31 发布日期:1998-10-31

SCREENING AND CHARACTERIZATION OF SCHISTOSOMA JAPONICUM REINFECTION RELATED cDNA CLONES

Wu Haiwei; Wang Rongzhi; Chen Shuzhen; Su Chuan; Zhang Zhaosong; Wu Guanling   

  1. Laboratory of Molecular Immuno Parasitology; Nanjing Medical University; Nanjing; Jiangsu; 210029
  • Received:1900-01-01 Revised:1900-01-01 Online:1998-10-31 Published:1998-10-31

摘要: 目的:获取编码可能指示再感染倾向的日本血吸虫特异免疫分子的cDNA克隆。方法:用日本血吸虫病流行区化疗后再感染人群高特异性IgG4水平的混合血清筛选构建于表达载体λgt11的日本血吸虫成虫cDNA文库,以PCR鉴定免疫筛选的阳性cDNA克隆插入片段选择插入片段大的克隆进行序列测定及基因数据库同源性检索。结果与结论:对cDNA文库中约8.6×104个噬菌斑进行了筛选,有11个噬菌斑呈阳性反应,其中有可能编码日本血吸虫的线粒体蛋白的基因克隆及可能与人群日本血吸虫再感染相关的基因克隆等4个日本血吸虫基因克隆。

关键词: 日本血吸虫, 再感染, cDNA克隆, 测序.基因数据库检索

Abstract: AIM:To obtain cDNA clones coding for S. japonicum(Sj) reinfection related specific
immunologic molecules for vaccination or diagnosis. METHODS: An adult S.japonicum cDNA library,
of which the cloning efficiency is 3.13×10 6, with directional inserts in the vector lambda
gt11, was screened with pooled serum from 43 reinfected human cases in a schistosomiasis endemic
area with high level of Sj specific lgG4 antibodies. Primers located several bases away from the insert position on the lambda gt11 arm were used to amplify the insert fragments by standard PCR. SILVER SEQUENCETM (PCR-silver) DNA sequencing system was then used to sequence selected positive clones with relatively large inserts and homology comparison with GenBank database was also carried out. RESULTS AND CONCLUSION: Eleven phage plaques were defined as positive out of the 8. 6×104 phage plaques immunoscreened by human specific lgG4 antibody. GenBank database retrieval showed that 4 new Sj gene clones including Sj reinfection-related specific protein-encoding gene and Sj mitochondrial protein-coding gene have been obtained.

Key words: Schistosoma japonjcum, reinfection, cDNA clone, sequencing, GenBabk database retrieval