中国寄生虫学与寄生虫病杂志

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藏羊源细粒棘球蚴抗原B8/2基因的克隆表达和免疫学鉴定

朵红1,李伟1,付永1,彭毛1,郭志宏1,沈秀英1,牛建章1,尼玛2,童延军3,河生德2,俄日姐3,炊文婷4,胡保平4   

  1. 1青海省畜牧兽医科学院,青海 810016;2 青海省海晏县兽医站,海晏 812200;3 青海省兴海县兽医站,兴海 813300;4 青海大学,青海 810016
  • 出版日期:2016-02-28 发布日期:2016-03-11

Cloning and Expression of Tibetan Sheep-origin Echinococcus granulosus Antigen B Gene and Protein Identification#br#  Using Immunological Method

DUO Hong1, LI Wei1, FU Yong1, PENG Mao1, GUO Zhi-hong1,SHEN Xiu-ying1, #br# NIU Jian-zhang1, NI Ma2, TONG Yan-jun3, HE Sheng-de2, E Ri-jie3,#br# CHUI Wen-ting4, HU Bao-ping4   

  1. 1 Qinghai Academy of Animal Science and Veterinary Science, Qinghai 810016, China;2 Haiyan County Veterinary Station of Qinghai Province, Haiyan 812200, China;3 Xinghai County Veterinary Station of Qinghai Province, Xinghai 813300, China;4 Qinghai University, Qinghai 810016, China
  • Online:2016-02-28 Published:2016-03-11

摘要:

目的  克隆、表达青海省藏羊源细粒棘球蚴(Echinococcus granulosus)抗原B8/2(EgAgB8/2)基因,并进行免疫学鉴定。  方法  用RT-PCR扩增EgAgB8/2基因cDNA,构建原核表达载体pET-EgAgB8/2,转化至大肠埃希菌BL21(DE3)中诱导表达,十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE)和蛋白质印迹(Western blotting)对诱导表达后的蛋白进行鉴定。  结果  克隆的EgAgB8/2基因长335 bp,序列分析表明与已报道的EgAgB8/2 cDNA序列的同源性为98%~100%,原核表达载体pET-EgAgB8/2构建正确。诱导表达后,通过SDS-PAGE检测,上清中有大量目的蛋白表达。纯化的蛋白经Western blotting鉴定为目的蛋白。  结论  成功克隆了青海省藏羊源EgAgB8/2基因,构建了原核表达载体,诱导表达后的蛋白为目的蛋白。

关键词: 细粒棘球蚴, 抗原B8/2基因, 克隆表达, 免疫学鉴定

Abstract:

Objective To clone and express the Tibetan Sheep-origin Echinococcus granulosus Antigen B8/2 Gene, and immunologically identify the encoded protein. Methods The cDNA of EgAgB8/2 gene was amplified by RT-PCR. The prokaryotic expression vector pET-EgAgB8/2 was constructed and transformed into E. coli BL21(DE3) for expression. Proteins were extracted, separated in SDS-PAGE and identified by Western blotting. Results The cloned EgAgB8/2 gene was 335 bp in length, and had a 98%-100% sequence homology with the reported cDNA sequence of EgAgB8/2, indicating the successful construction of the pET-EgAgB8/2 vector. SDS-PAGE revealed large amount of proteins in supernatant. Western blotting further confirmed the expression of the target protein. Conclusion  The EgAgB8/2 gene of Tibetan Sheep-origin in Qinghai is successfully cloned, and the constructed pET-EgAgB8/2 vector can be used to express the target protein.

Key words: Echinococcus granulosus, AgB8/2 gene, Gene cloning, Prokaryotic expression