A study on the immune response induced by a DNA vaccine encoding Mtb۳۲C-HBHA antigen of Mycobacterium tuberculosis

Publish Year: 1396
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_IJBMS-20-10_007

تاریخ نمایه سازی: 28 مهر 1400

Abstract:

Objective(s): Tuberculosis (TB) has still remained a global health issue. One third of the world's population is infected with tuberculosis and the current BCG vaccine has low efficiency; hence, it is necessary to develop a new vaccine against TB. The aim of the current study was to evaluate the efficiency of a novel DNA vaccine encoding Mtb۳۲C-HBHA antigen in inducing specific immune responses against Mycobacterium tuberculosis. Materials and Methods: A DNA plasmid vaccine expressing Mtb۳۲C-HBHA fusion protein was constructed and its ability in protein expression was examined by RT-PCR and Western blot methods. Female BALB/c mice were vaccinated with ۱۰۰ μg of purified recombinant vector in an attempt to assess its immunogenicity and protective efficacy. Further, the cytokines, IFN-γ, IL-۱۲, IL-۴, IL-۱۰, and TGF-β were assessed. Results: The levels of all the studied cytokines were significantly increased (P<۰.۰۵) compared with the control group. IFN-γ production in the group receiving DNA vaccine plus BCG was increased compared with those receiving only DNA vaccine or BCG (P<۰.۰۰۱). Conclusion: The immunogenicity of the new chimeric DNA vaccine was confirmed alone and in combination with BCG. Based on the results of the current study, the constructed DNA vaccine induced the expression of Mtb۳۲C-HBHA fusion protein efficiently in vitro. Furthermore, high levels of the specific cytokines were induced in mice. By using this DNA vaccine as a booster after BCG, higher amounts of IFN-γ will be produced.

Authors

Roghayeh Teimourpour

Department of Microbiology, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran

Hadi peeridogaheh

Department of Microbiology, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran

Amir Teimourpour

Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical science, Tehran, Iran

Mohsen Arzanlou

Department of Microbiology, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran

Zahra Meshkat

Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

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