中国寄生虫学与寄生虫病杂志 ›› 2010, Vol. 28 ›› Issue (2): 9-128.

• 论著 • 上一篇    下一篇

细粒棘球蚴特异性抗原基因P-29的原核表达及免疫学鉴定

李洁1,王志钢1 *,郝喜燕1,陈献威1,王红霞1,李树裕1,杨娇馥1,杨军2   

  1. 1内蒙古大学生命科学学院,哺乳动物生殖生物学与生物技术教育部重点实验室,呼和浩特 010021;2 内蒙古自治区呼和浩特市环境科学研究所,呼和浩特 010030
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-04-30 发布日期:2010-04-30
  • 通讯作者: 王志钢

Prokaryotic Expression and Immunologic Identification of P-29 Gene from Echinococcus granulosus Hydatid Cyst

LI Jie1,WANG Zhi-gang1 *,HAO Xi-yan1,CHEN Xian-wei1,WANG Hong-xia1,LI Shu-yu1,YANG Jiao-fu1,YANG Jun2   

  1. 1 College of Life Science,Inner Mongolia University,Key Laboratory of Mammal Reproductive Biology and Biotechnology,Ministry of Education,Hohhot 010021,China;2 Hohhot Institute of Environmental Sciences,Hohhot 010030,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-04-30 Published:2010-04-30
  • Contact: WANG Zhi-gang

摘要: 目的 对细粒棘球蚴P-29基因进行克隆、表达和免疫反应性分析。 方法 以细粒棘球蚴总RNA为模板,反转录PCR扩增P-29基因,将其克隆至原核表达载体pET44a(+)中,构建重组原核表达载体pET-P-29,转入大肠埃希菌BL21(DE3)中,用异丙基-β-D-硫代半乳糖苷(IPTG)诱导表达,十二烷基硫酸钠?鄄聚丙烯酰胺凝胶电泳(SDS-PAGE)观察重组蛋白的表达情况,用蛋白纯化试剂盒纯化蛋白,蛋白质印迹(Western blotting)分析重组蛋白与细粒棘球蚴病患者血清的免疫反应性。 结果 PCR、双酶切和DNA测序结果表明,重组质粒pET-P-29构建成功。SDS-PAGE结果显示,重组蛋白Nus-P-29的相对分子质量(Mr)约为93 000,纯化后的蛋白浓度为0.78 mg/ml。重组蛋白Nus-P-29能被细粒棘球蚴病患者血清识别。 结论 细粒棘球蚴P-29基因表达成功,纯化后的重组蛋白Nus-P-29具有较强的免疫反应性。

关键词: 细粒棘球蚴, 特异性抗原基因, 原核表达

Abstract: Objective To clone and express P-29 gene of Echinococcus granulosus, and analyze its immunore-activity. Methods Total RNA was extracted from the hydatid cyst of E. granulosus and its P-29 gene was amplified by RT-PCR. The PCR product was cloned into pET44a(+) vector. The recombinant plasmid was transformed into E. coli BL21 (DE3) and followed by expression of the protein induced by IPTG. The protein was purified, and tested by SDS-PAGE. Its immunoreactivity was examined by Western blotting. Results The recombinant expression plasmid was identified by PCR, double endonuclease digestion and sequencing. The recombinant Nus-P-29 was about Mr 93 000 with a concentration of 0.78 mg/ml. It was recognized by the sera of cystic echinococcosis patients. Conclusion The P-29 gene has been expressed with adequate immunoreactivity.

Key words: Echinococcus granulosus, Specific antigen gene, Prokaryotic expression