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Design and Synthesis of Pyrano[3,2-b]indolones Showing Antimycobacterial Activity
N. Monakhova, J. Korduláková, A. Vocat, A. Egorova, A. Lepioshkin, EG. Salina, J. Nosek, E. Repková, J. Zemanová, H. Jurdáková, R. Górová, J. Roh, G. Degiacomi, JC. Sammartino, MR. Pasca, ST. Cole, K. Mikušová, V. Makarov
Language English Country United States
Document type Journal Article, Research Support, Non-U.S. Gov't
- MeSH
- Antitubercular Agents pharmacology MeSH
- Latent Tuberculosis * MeSH
- Humans MeSH
- Mycobacterium tuberculosis * genetics MeSH
- Tuberculosis * MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Latent Mycobacterium tuberculosis infection presents one of the largest challenges for tuberculosis control and novel antimycobacterial drug development. A series of pyrano[3,2-b]indolone-based compounds was designed and synthesized via an original eight-step scheme. The synthesized compounds were evaluated for their in vitro activity against M. tuberculosis strains H37Rv and streptomycin-starved 18b (SS18b), representing models for replicating and nonreplicating mycobacteria, respectively. Compound 10a exhibited good activity with MIC99 values of 0.3 and 0.4 μg/mL against H37Rv and SS18b, respectively, as well as low toxicity, acceptable intracellular activity, and satisfactory metabolic stability and was selected as the lead compound for further studies. An analysis of 10a-resistant M. bovis mutants disclosed a cross-resistance with pretomanid and altered relative amounts of different forms of cofactor F420 in these strains. Complementation experiments showed that F420-dependent glucose-6-phosphate dehydrogenase and the synthesis of mature F420 were important for 10a activity. Overall these studies revealed 10a to be a prodrug that is activated by an unknown F420-dependent enzyme in mycobacteria.
Department of Biology and Biotechnology Lazzaro Spallanzani University of Pavia Pavia 27100 Italy
Faculty of Pharmacy in Hradec Králové Charles University Hradec Králové 50005 Czech Republic
Global Health Institute Ecole Polytechnique Fédérale de Lausanne Lausanne 1015 Switzerland
References provided by Crossref.org
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