1. Expression and purification of Mycobacterium tuberculosis ESAT-6 and MPT64 fusion protein and its immunoprophylactic potential in mouse model
- Author
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Bai, Yinlan, Xue, Ying, Gao, Hui, Wang, Limei, Ding, Tianbing, Bai, Wentao, Fan, Ailin, Zhang, Jianfang, An, Qunxing, and Xu, Zhikai
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MYCOBACTERIUM tuberculosis , *PREVENTIVE medicine , *MYCOBACTERIAL diseases , *PATHOLOGY - Abstract
Abstract: The completion of Mycobacterium tuberculosis genome sequence has opened a new way for the identification and characterization of bacterial antigens, such as ESAT-6, CFP10, MPT64, and Ag85 complex, which are helpful for tuberculosis control. In this work, genes of ESAT-6 and MPT64 were fused and expressed in Escherichia coli in form of inclusion bodies with a histidine tag. The expressed fusion protein was purified by nitrilotriacetic acid (Ni–NTA) affinity chromatography under denaturing conditions, and the yield was 18mg/L of culture. In mice, the purified ESAT-6–MPT64 fusion protein elicited stronger humoral response, greater splenic lymphocyte stimulated index, and higher levels of IFN-γ and IL-12 production than that of the single MPT64 inoculation group, and rendered modest protection on the experimental tuberculosis mouse models. In short, the ESAT-6–MPT64 fusion protein might be a potential candidate vaccine for tuberculosis. [Copyright &y& Elsevier]
- Published
- 2008
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