Synthesis and biological evaluation of 1,2,4-triazole-3-thione and 1,3,4-oxadiazole-2-thione as antimycobacterial agents
作者:Amol D. Sonawane、Navnath D. Rode、Laxman Nawale、Rohini R. Joshi、Ramesh A. Joshi、Anjali P. Likhite、Dhiman Sarkar
DOI:10.1111/cbdd.12939
日期:2017.8
Resistance among dormant mycobacteria leading to multidrug‐resistant and extremely drug‐resistant tuberculosis is one of the major threats. Hence, a series of 1,2,4‐triazole‐3‐thione and 1,3,4‐oxadiazole‐2‐thione derivatives (4a–5c) have been synthesized and screened for their antitubercular activity against Mycobacterium tuberculosis H37Ra (H37Ra). The triazolethiones 4b and 4v showed high antitubercular activity (both MIC and IC50) against the dormant H37Ra by in vitro and ex vivo. They were shown to have more specificity toward mycobacteria than other Gram‐negative and Gram‐positive pathogenic bacteria. The cytotoxicity was almost insignificant up to 100 μg/ml against THP‐1, A549, and PANC‐1 human cancer cell lines, and solubility was high in aqueous solution, indicating the potential of developing these compounds further as novel therapeutics against tuberculosis infection.
Semisynthetic pleuromutilin antimicrobials with therapeutic potential against methicillin-resistant Staphylococcus aureus by targeting 50S ribosomal subunit
successfully localized inside the binding pocket of 50S ribosomalsubunit (ΔGb = −9.40 kcal/mol). Meanwhile, most of these compounds had no significant inhibitory effect on RAW 264.7 cells and 16HBE cells at the concentration of 8 μg/mL. The obtained outcomes showed that compound 30a could be utilized as an encouraging perspective in the development of a new therapeutic candidate for bacterial infection.