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- Title
Fusion of Dendritic Cells Activating Rv2299c Protein Enhances the Protective Immunity of Ag85B-ESAT6 Vaccine Candidate against Tuberculosis.
- Authors
Back, Yong Woo; Bae, Hyun Shik; Choi, Han-Gyu; Binh, Dang Thi; Son, Yeo-Jin; Choi, Seunga; Kim, Hwa-Jung
- Abstract
In Mycobacterium tuberculosis infection, naïve T cells that encounter mycobacterial antigens through dendritic cells (DCs) induce various CD4+ T-cell responses; therefore, appropriate DC activation is the key for protective immunity against tuberculosis. We previously found that Rv2299c-matured DCs induce Th1 differentiation with bactericidal activity. In this study, to prove that Rv2299c could enhance the protective immunity of other vaccine candidates comprising T-cell-stimulating antigens, Ag85B-ESAT6, a well-known vaccine candidate, was selected as a fusion partner of Rv2299c. Recombinant Rv2299c-Ag85B-ESAT6 protein induced DC maturation and activation. Furthermore, fusion of Rv2299c enhanced the protective efficacy of the Ag85B-ESAT6 vaccine in a mouse model and significantly higher production of TNF-α and IL-2 was detected in the lungs, spleen, and lymph nodes of the group immunized with the Rv2299c-fused protein than with Ag85B-ESAT6. In addition, fusion of Rv2299c enhanced the Ag85B-ESAT6-mediated expansion of multifunctional CD4+ T cells. These data suggested that the DC-activating protein Rv2299c may potentiate the protective immunity of the vaccine candidate comprising T cell antigens.
- Subjects
CELL fusion; IMMUNITY; TUBERCULOSIS; MYCOBACTERIUM tuberculosis; T cells; TUMOR necrosis factors
- Publication
Pathogens, 2020, Vol 9, Issue 11, p865
- ISSN
2076-0817
- Publication type
Article
- DOI
10.3390/pathogens9110865