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Recombinant outer membrane protein F-B subunit of LT protein as a prophylactic measure against Pseudomonas aeruginosa burn infection in mice

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World Journal of Methodology 2015年第4期5卷 230-237页

作者： Hassan Heydari Farsani Iraj Rasooli seyed latif mousavi gargari Shahram Nazarian Shakiba Darwish Alipour Astaneh Department of Biology Shahed University Molecular Microbiology Research Center Shahed University Department of Biology Faculty Of Science Imam Hussein University Faculty of Biotechnology University of Semnan

AIM: To study immunogenicity of outer membrane protein F(Opr F) fused with B subunit of LT(LTB), against Pseudomonas aeruginosa(P. aeruginosa). METHODS: The Opr F, a major surface exposed outer membrane protein that is antigenically conserved in various strains of P. aeruginosa, is a promising immunogen against P. aeruginosa. In the present study recombinant Opr F and Opr F-LTB fusion gene was cloned, expressed and purified. BALB/c mice and rabbits were immunized using recombinant Opr F and Opr F-LTB and challenged at the burn site with P. aeruginosa lethal dose of 104 CFU. The protective efficacy of rabbit anti Opr F Ig G against P. aeruginosa burn infection was investigated by passive immunization. RESULTS: It has been well established that the LTB is a powerful immunomodulator with strong adjuvant activity. LTB as a bacterial adjuvant enhanced immunogenicity of Opr F and anti Opr F Ig G titer in serum was increased. Experimental findings showed significantly higher average survival rate in burned mice immunized with Opr F-LTB than immunized with Opr F or the control group. Rabbits anti Opr F Ig G brought about 75% survival of mice following challenge with P. aeruginosa. Post challenge hepatic and splenic tissues of mice group immunized with Opr F-LTB had significantly lower bacterial load than those immunized with Opr F or the control groups. CONCLUSION: These results demonstrate that LTBfused Opr F might be a potential candidate protein for a prophylactic measure against P. aeruginosa in burn infection.

关键词： Pseudomonas aeruginosa Outer membrane protein F B subunit of LT Immunization Burn

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