[Study on immunogenicity elicited by a recombinant vaccine of rBCG-Rv3133c to fight against dormancy Mycobacterium tuberculosis]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2013 Aug;30(4):817-21.
[Article in Chinese]

Abstract

To obtain a vaccine to defend from dormancy Mycobacterium tuberculosis, we constructed the recombinant Bacilli Calmette-Guérin (BCG) vaccine with Rv3133c encoding dormancy-correlated transcriptional regulatory protein DosR in Mycobacterium tuberculosis as a target gene, and evaluated its immunogenicity in BALB/c mice. In this study, we constructed the recombinant plasmids of rpMV361-Rv3133c using gene colon technology. We then transformed BCG strains with above-mentioned plasmids to obtain recombinant vaccine of rBCG-Rv3133c. We used the rBCG strains successfully constructed to vaccinate in BALB/c mice. 30d and 180d after immunization, the specific antibody titers were determined to investigate humoral responses induced by recombinant vaccine. We detected changes of splenocyte subsets of CD4+T, CD8+ T cells and cytokine of IFN-gamma secreted by splenocytes for evaluation of cellular immune responses. The results showed that the rBCG-Rv3133c was able to induce higher levels of antibody titer, stronger proliferative responses and higher IFN-gamma production comparing with BCG vaccine. The results also suggested that this recombinant vaccine was a more efficacious tuberculosis vaccine for further study.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antibodies, Bacterial / blood
  • Antigens, Bacterial / genetics*
  • Antigens, Bacterial / immunology
  • BCG Vaccine / immunology*
  • Bacterial Proteins / genetics
  • Bacterial Proteins / immunology*
  • DNA-Binding Proteins
  • Escherichia coli / genetics
  • Escherichia coli / metabolism
  • Interferon-gamma / immunology
  • Mice
  • Mice, Inbred BALB C
  • Mycobacterium tuberculosis / immunology*
  • Protein Kinases / genetics
  • Protein Kinases / immunology*
  • Recombinant Proteins / immunology
  • T-Lymphocyte Subsets / immunology
  • Tuberculosis / prevention & control
  • Vaccination
  • Vaccines, Synthetic / immunology

Substances

  • Antibodies, Bacterial
  • Antigens, Bacterial
  • BCG Vaccine
  • Bacterial Proteins
  • DNA-Binding Proteins
  • DosR protein, Mycobacterium tuberculosis
  • Recombinant Proteins
  • Vaccines, Synthetic
  • Interferon-gamma
  • Protein Kinases