中国寄生虫学与寄生虫病杂志 ›› 1999, Vol. 17 ›› Issue (1): 4-15.

• 论著 • 上一篇    下一篇

恶性疟原虫MSP1_(19)与PfCMR基因的体外重组与克隆鉴定

李学荣;余新炳;罗树红
  

  1. 中山医科大学寄生虫学教研室,广州 510089
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-02-28 发布日期:1999-02-28

RECOMBINATION AND CLONING OF MSP1 19 AND PfCMR OF PLASMODIUM FALCIPARUM

LI Xuerong;YU Xinbing;LUO Shuhong

  

  1. Department of Parasitology;Sun Yat sen University of Medical Sciences;Guangzhou 510089
  • Received:1900-01-01 Revised:1900-01-01 Online:1999-02-28 Published:1999-02-28

摘要:   目的:构建编码恶性疟原虫复合多价保护性抗原的基因的重组质粒,为进行基因免疫提供条件。方法:设计一对特异引物P1与P2,采用PCR法扩增获取MSP1中C端19肽基因,纯化后用SalⅠ+XbaⅠ双酶切,把含复合基因PfCMR的重组质粒pWR450-1/PfCMR用EcoRⅠ+SalⅠ双酶切,回收复合基因PfCMR,将MSP119基因与PfCMR基因串联后与经EcoRⅠ+XbaⅠ双酶切的真核表达质粒pcDNA3进行重组,转化大肠杆菌JM109,经电泳初筛、双酶切鉴定及PCR鉴定。结果:PCR扩增获得363bp的MSP119基因,重组克隆经双酶切鉴定及PCR鉴定后获得正确重组克隆子pcDNA3-PfCMR-MSP119(命名为pcDNA3-Pf8),Pf8基因长度为618bp。结论:成功构建编码恶性疟原虫多价保护性抗原的基因的重组质粒pcDNA3-Pf8。

关键词: 恶性疟原虫, 聚合酶链式反应, 核酸疫苗, 克隆, 主要裂殖子表面蛋白1

Abstract:  AIM∶ To construct a recombinant plasmid DNA encoding multiantigens of Plasmodium falciparum and to provide the requirements for DNA immunization. METHODS:Two oligonucleotide primers were designed to amplify MSP1 19 , the purified PCR products were digested by SalⅠ+XbaⅠ, and the recombinant plasmid pWR450 1/PfCMR was digested by EcoRⅠ+SalⅠ to recover PfCMR gene . PfCMR and MSP1 19 gene fragments were linked and recombined with mammalian expression vector pcDNA3. RESULTS:The MSP1 19 gene fragment with about 363 base pairs were specifically amplified by using PCR technique. The positive recombinant pcDNA3 PfCMR MSP1 19 (named pcDNA3 Pf8) was screened and identified by agarose gel electrophoresis,endonulease digestion and PCR technique, the whole length of Pf8 is 618 bp . CONCLUSION:By specifically amplifying MSP1 19 gene at the C terminal of MSP1,a recombinant plasmid pcDNA3 Pf8 encoding multiantigens of Plasmodium falciparum was successfully constructed.

Key words: Plasmodium falciparum, polymerase chain reaction, nucleic acid vaccine, cloning, merozoite surface protein 1