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Volume 22, Issue 7 (3-2015)
Abstract

Introduction: IpaD protein plays an im-portant role in invasion, pathogenesis and infection caused by Shigella and E. coli. Another major virulence factor in Shigella dysenteriae type 1 and E. coli O157: H7 is Shigella entrotoxin or (StxB). A suitable candidate vaccine could be made by a mixture or fusion of IpaD and STxB pr-oteins. In this study, the immunogenicity and antibody titer of fused mixed and separated recombinant proteins, IpaD and STxB, in mice were compared with each other. Materials & Methods: In this experimental study, recombinant vectors containing the gene sequences stxB-IpaD, IpaD and stxB, were prepared and also transferred into the E. coli BL21 DE3 bacterium. The protein expression levels were assessed and their expression was approved by using of We-stern blot technique. After purification of recombinant proteins with the column of chromatography, they were injected four times consecutively to the mice. Findings: The antibody titers were statisti-cally different for STxB, IpaD, STxB-IpaD and IpaD mixed with STxB antigens in the mice, and antibody levels increased by adding the StxB to IpaD. Discussion & Conclusion: The results of this study indicate that the furin linker sep-arated by semi furins and the produced pro-tein from mixture and fusion genes, ipaD and stxB, can increase STxB immunege-nicity effect, and could be a good candidate for the production of recombinant vaccines against Shigella and E. coli types.

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مجله دانشگاه علوم پزشکی ایلام Journal of Ilam University of Medical Sciences
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