中国寄生虫学与寄生虫病杂志 ›› 2006, Vol. 24 ›› Issue (4): 11-289.

• 实验报道 • 上一篇    下一篇

猪带绦虫TSO45W-4BX与猪CD58分子在大肠埃希菌中的联合表达

骆学农;郑亚东;窦永喜;侯俊琳;景志忠;才学鹏   

  1. 中国农业科学院兰州兽医研究所 家畜疫病病原生物学国家重点实验室, 甘肃省动物寄生虫病重点实验室, 兰州 730046)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-08-30 发布日期:2006-08-30
  • 通讯作者: 才学鹏

Combined Expression of TSO45W-4BX from Taenia solium and Porcine CD58 in Escherichia coli

LUO Xue-nong;ZHENG Ya-dong;DOU Yong-xi; HOU Jun-lin;JING Zhi-zhong; CAI Xue-peng   

  1. Key Laboratory of Veterinary Parasitology of Gansu Province, State Key Laboratory of Veterinary Etiological Biology, CAAS, Lanzhou 730046, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-08-30 Published:2006-08-30
  • Contact: CAI Xue-peng

摘要: 目的 以猪CD58为分子佐剂,将CD58基因与猪带绦虫疫苗候选抗原基因TSO45W-4BX联合表达,寻找新型抗猪囊尾蚴疫苗。 方法 分别以重组质粒pGEM-4B和pGEM-CD58为模板,PCR扩增猪带绦虫TSO45W-4BX基因和猪CD58基因,将TSO45W-4BX与酶切处理的pGEX-4T-1定向连接,转化大肠埃希菌JM109,重组质粒经鉴定正确后,在其下游酶切插入CD58基因,PCR扩增和测序证明阅读框正确后,用异丙基-β-D-硫代半乳糖苷(IPTG)诱导表达,用十二烷基磺酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE))和蛋白质印迹法(Western blotting)分析表达产物的免疫活性。 结果 pGEX-4BX和pGEX-4BX/CD58分别表达Mr 41 000和Mr 69 000的融合蛋白,pGEX-4BX表达产物主要以可溶性形式存在,而pGEX-4BX/CD58却以包涵体形式存在,但两者都能被囊尾蚴病患者血清识别。 结论 TSO45W-4BX与CD58基因联合表达,TSO45W-4BX仍具有免疫活性。

关键词: 猪带绦虫, TSO45W-4BX, CD58, 联合表达

Abstract: Objective To express the TSO45W-4BX of Taenia solium in combination with CD58 as a molecular adjuvant for improving the protective efficacy of the TSO45W-4BX recombinant vaccine. Methods TSO45W-4BX and porcine CD58 genes were amplified by PCR, using recombinant plasmids pGEM-4B and pGEM-CD58 as template respectively. The CD58 fragment was inserted into the recombinant plasmid pGEX-4T-1 with directly ligated TSO45W-4BX. The transformant was induced with IPTG and followed by identifying the integrity of the recombinant containing TSO45W-4BX and porcine CD58 with PCR and sequencing. The products were analyzed by SDS-PAGE and Western blotting. Results The expression products of Mr 69 000 GST-4BX/CD58 and Mr 41 000 GST-4BX were present mainly in the form of inclusion bodies and soluble substance respectively, and both were recognized by sera of cysticercosis patients. Conclusions The TSO45W-4BX co-expressed with porcine CD58 conserves its immune reactivity.

Key words: Taenia solium, TSO45W-4BX, CD58, Combined expression