TitleMycobacterium tuberculosis Proteome Response to Antituberculosis Compounds Reveals Metabolic "Escape" Pathways That Prolong Bacterial Survival.
Publication TypeJournal Article
Year of Publication2017
AuthorsDanelishvili, L, Shulzhenko, N, Chinison, JJJ, Babrak, L, Hu, J, Morgun, A, Burrows, G, Bermudez, LE
JournalAntimicrob Agents Chemother
Date Published2017 Jul

Tuberculosis (TB) continues to be one of the most common bacterial infectious diseases and is the leading cause of death in many parts of the world. A major limitation of TB therapy is slow killing of the infecting organism, increasing the risk for the development of a tolerance phenotype and drug resistance. Studies indicate thattakes several days to be killed upon treatment with lethal concentrations of antibiotics bothandTo investigate how metabolic remodeling can enable transient bacterial survival during exposure to bactericidal concentrations of compounds,strain H37Rv was exposed to twice the MIC of isoniazid, rifampin, moxifloxacin, mefloquine, or bedaquiline for 24 h, 48 h, 4 days, and 6 days, and the bacterial proteomic response was analyzed using quantitative shotgun mass spectrometry. Numerous sets ofbacterial proteins were identified over the 6-day treatment. Network analysis and comparisons between the drug treatment groups revealed several shared sets of predominant proteins and enzymes simultaneously belonging to a number of diverse pathways. Overexpression of some of these proteins in the nonpathogenicextended bacterial survival upon exposure to bactericidal concentrations of antimicrobials, and inactivation of some proteins inprevented the pathogen from escaping the fast killingand in macrophages, as well. Our biology-driven approach identified promising bacterial metabolic pathways and enzymes that might be targeted by novel drugs to reduce the length of tuberculosis therapy.

Alternate JournalAntimicrob. Agents Chemother.
PubMed ID28416555
PubMed Central IDPMC5487666
Grant ListR21 AI110078 / AI / NIAID NIH HHS / United States