{"title":"[Co-expression of CFA/I and CS6 of Enterotoxigenic Escherichia coli ( ETEC ) in Shigella flexneri 2a T32 Derivative Strain FWL01].","authors":"Ji-Ping Zheng, Ling-Chun Wang, Peng Wang, Gang Luo, Shu-Qin Li, Hai-Qing Duan, Cui-Fen Huang, Zhao-Shan Zhang","doi":"","DOIUrl":null,"url":null,"abstract":"<p><p>Among the known colonization factors of enterotoxigenic Escherichia coli (ETEC), CFA/I and CS6 (the common antigen in the CFA/IV fimbrial antigens ) are two of the most prevalent fimbriae found in clinical isolates but are never expressed by the same wild-type strains. In this study, CFA/I and CS6 of ETEC were co-expressed in Shigella flexneri 2a T32 derivative strain FWL01 by using a host-plasmid lethal balancing system based on asd gene. The results indicate that the recombinant plasmid carrying CFA/I and CS6 could be stably integrated in FWL01. Expression of the two antigens did not interfere the host growth. The results of immunofluorescence analysis showed that CFA/I and CS6 were localized on the surface of the strain FWL01. In Balb/c mice orally immunized with the recombinant strain, the immune responses against CFA/I and CS6 were observed. Those observations show the feasibility of a multivalent vaccine expressing different fimbrial antigens in attenuated Shigella flexneri.</p>","PeriodicalId":21763,"journal":{"name":"Sheng wu hua xue yu sheng wu wu li xue bao Acta biochimica et biophysica Sinica","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2003-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sheng wu hua xue yu sheng wu wu li xue bao Acta biochimica et biophysica Sinica","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Among the known colonization factors of enterotoxigenic Escherichia coli (ETEC), CFA/I and CS6 (the common antigen in the CFA/IV fimbrial antigens ) are two of the most prevalent fimbriae found in clinical isolates but are never expressed by the same wild-type strains. In this study, CFA/I and CS6 of ETEC were co-expressed in Shigella flexneri 2a T32 derivative strain FWL01 by using a host-plasmid lethal balancing system based on asd gene. The results indicate that the recombinant plasmid carrying CFA/I and CS6 could be stably integrated in FWL01. Expression of the two antigens did not interfere the host growth. The results of immunofluorescence analysis showed that CFA/I and CS6 were localized on the surface of the strain FWL01. In Balb/c mice orally immunized with the recombinant strain, the immune responses against CFA/I and CS6 were observed. Those observations show the feasibility of a multivalent vaccine expressing different fimbrial antigens in attenuated Shigella flexneri.