bioA mutant of Mycobacterium tuberculosis shows severe growth defect and imparts protection against tuberculosis in Guinea pigs

Ritika Kar Bahal, Prachi Nangpal, Shubhita Mathur, Swati Singh, Anil k. Tyagi

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Owing to the devastation caused by tuberculosis along with the unsatisfactory performance of the Bacillus Calmette–Guérin (BCG) vaccine, a more efficient vaccine than BCG is required for the global control of tuberculosis. A number of studies have demonstrated an essential role of biotin biosynthesis in the growth and survival of several microorganisms, including mycobacteria, through deletion of the genes involved in de novo biotin biosynthesis. In this study, we demonstrate that a bioA mutant of Mycobacterium tuberculosis (MtbΔbioA) is highly attenuated in the guinea pig model of tuberculosis when administered aerogenically as well as intradermally. Immunization with MtbΔbioA conferred significant protection in guinea pigs against an aerosol challenge with virulent M. tuberculosis, when compared with the unvaccinated animals. Booster immunization with MtbΔbioA offered no advantage over a single immunization. These experiments demonstrate the vaccinogenic potential of the attenuated M. tuberculosis bioA mutant against tuberculosis.
Original languageEnglish
Article numbere0179513
JournalPLoS One
Volume12
Issue number6
DOIs
Publication statusPublished - 2017
Externally publishedYes

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