Protective efficacy of an attenuated Mtb ΔLprG vaccine in mice.

Autor: Amanda J Martinot, Eryn Blass, Jingyou Yu, Malika Aid, Shant H Mahrokhian, Sara B Cohen, Courtney R Plumlee, Rafael A Larocca, Noman Siddiqi, Shoko Wakabayashi, Michelle Gardner, Rebecca Audette, Anne Devorak, Kevin B Urdahl, Eric J Rubin, Dan H Barouch
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: PLoS Pathogens, Vol 16, Iss 12, p e1009096 (2020)
Druh dokumentu: article
ISSN: 1553-7366
1553-7374
DOI: 10.1371/journal.ppat.1009096
Popis: Bacille Calmette-Guerin (BCG), an attenuated whole cell vaccine based on Mycobacterium bovis, is the only licensed vaccine against Mycobacterium tuberculosis (Mtb), but its efficacy is suboptimal and it fails to protect against pulmonary tuberculosis. We previously reported that Mtb lacking the virulence genes lprG and rv1410c (ΔLprG) was highly attenuated in immune deficient mice. In this study, we show that attenuated ΔLprG Mtb protects C57BL/6J, Balb/cJ, and C3HeB/FeJ mice against Mtb challenge and is as attenuated as BCG in SCID mice. In C3HeB/FeJ mice, ΔLprG vaccination resulted in innate peripheral cytokine production and induced high polyclonal PPD-specific cytokine-secreting CD4+ T lymphocytes in peripheral blood. The ΔLprG vaccine afforded protective efficacy in the lungs of C3H/FeJ mice following both H37Rv and Erdman aerosolized Mtb challenges. Vaccine efficacy correlated with antigen-specific PD-1-negative CD4+ T lymphocytes as well as with serum IL-17 levels after vaccination. We hypothesize that induction of Th17 cells in lung is critical for vaccine protection, and we show a serum cytokine biomarker for IL-17 shortly after vaccination may predict protective efficacy.
Databáze: Directory of Open Access Journals
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