New quinoline-urea-benzothiazole hybrids as promising antitubercular agents: synthesis, in vitro antitubercular activity, cytotoxicity studies, and in silico ADME profiling

New quinoline-urea-benzothiazole hybrids as promising antitubercular agents: synthesis, in vitro antitubercular activity, cytotoxicity studies, and in silico ADME profiling. Besson, T., Marchand, P., Moodley, R., Mashaba, C., Rakodi, G. H, Ncube, N. B, Maphoru, M. V, Balogun, M. O, Jordan, A., Warner, D. F, Khan, R., & Tukulula, M. Pharmaceuticals, 15(5):576, Multidisciplinary Digital Publishing Institute, may, 2022.

Paper doi abstract bibtex

A series of 25 new benzothiazole-urea-quinoline hybrid compounds were synthesized successfully via a three-step synthetic sequence involving an amidation coupling reaction as a critical step. The structures of the synthesized compounds were confirmed by routine spectroscopic tools (1H and 13C NMR and IR) and by mass spectrometry (HRMS). In vitro evaluation of these hybrid compounds for their antitubercular inhibitory activity against the Mycobacterium tuberculosis H37Rv pMSp12::GPF bioreporter strain was undertaken. Of the 25 tested compounds, 17 exhibited promising anti-TB activities of less than 62.5 µM (MIC90). Specifically, 13 compounds (6b, 6g, 6i–j, 6l, 6o–p, 6r–t, and 6x–y) showed promising activity with MIC90 values in the range of 1–10 µM, while compound 6u, being the most active, exhibited sub-micromolar activity (0.968 µM) in the CAS assay. In addition, minimal cytotoxicity against the HepG2 cell line (cell viability above 75%) in 11 of the 17 compounds, at their respective MIC90 concentrations, was observed, with 6u exhibiting 100% cell viability. The hybridization of the quinoline, urea, and benzothiazole scaffolds demonstrated a synergistic relationship because the activities of resultant hybrids were vastly improved compared to the individual entities. In silico ADME predictions showed that the majority of these compounds have drug-like properties and are less likely to potentially cause cardiotoxicity (QPlogHERG \textgreater −5). The results obtained in this study indicate that the majority of the synthesized compounds could serve as valuable starting points for future optimizations as new antimycobacterial agents.

@article{Besson2022,
abstract = {A series of 25 new benzothiazole-urea-quinoline hybrid compounds were synthesized successfully via a three-step synthetic sequence involving an amidation coupling reaction as a critical step. The structures of the synthesized compounds were confirmed by routine spectroscopic tools (1H and 13C NMR and IR) and by mass spectrometry (HRMS). In vitro evaluation of these hybrid compounds for their antitubercular inhibitory activity against the Mycobacterium tuberculosis H37Rv pMSp12::GPF bioreporter strain was undertaken. Of the 25 tested compounds, 17 exhibited promising anti-TB activities of less than 62.5 {\&}micro;M (MIC90). Specifically, 13 compounds (6b, 6g, 6i{\&}ndash;j, 6l, 6o{\&}ndash;p, 6r{\&}ndash;t, and 6x{\&}ndash;y) showed promising activity with MIC90 values in the range of 1{\&}ndash;10 {\&}micro;M, while compound 6u, being the most active, exhibited sub-micromolar activity (0.968 {\&}micro;M) in the CAS assay. In addition, minimal cytotoxicity against the HepG2 cell line (cell viability above 75{\%}) in 11 of the 17 compounds, at their respective MIC90 concentrations, was observed, with 6u exhibiting 100{\%} cell viability. The hybridization of the quinoline, urea, and benzothiazole scaffolds demonstrated a synergistic relationship because the activities of resultant hybrids were vastly improved compared to the individual entities. In silico ADME predictions showed that the majority of these compounds have drug-like properties and are less likely to potentially cause cardiotoxicity (QPlogHERG {\textgreater} {\&}minus;5). The results obtained in this study indicate that the majority of the synthesized compounds could serve as valuable starting points for future optimizations as new antimycobacterial agents.},
author = {Besson, Thierry and Marchand, Pascal and Moodley, Rashmika and Mashaba, Chakes and Rakodi, Goitsemodimo H and Ncube, Nomagugu B and Maphoru, Mabuatsela V and Balogun, Mohammed O and Jordan, Audrey and Warner, Digby F and Khan, Rene and Tukulula, Matshawandile},
doi = {10.3390/PH15050576},
file = {:C$\backslash$:/Users/01462563/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Besson et al. - 2022 - New quinoline-urea-benzothiazole hybrids as promising antitubercular agents synthesis, in vitro antitubercular ac.pdf:pdf},
issn = {1424-8247},
journal = {Pharmaceuticals},
keywords = {HepG2 cell line,OA,antitubercular activity,benzothiazole hybrids,cytotoxicity,fund{\_}not{\_}ack,in silico ADME properties,minimum inhibitory concentration,original,quinoline,urea},
mendeley-tags = {OA,fund{\_}not{\_}ack,original},
month = {may},
number = {5},
pages = {576},
pmid = {35631402},
publisher = {Multidisciplinary Digital Publishing Institute},
title = {{New quinoline-urea-benzothiazole hybrids as promising antitubercular agents: synthesis, \textit{in vitro} antitubercular activity, cytotoxicity studies, and \textit{in silico} ADME profiling}},
url = {https://www.mdpi.com/1424-8247/15/5/576/htm https://www.mdpi.com/1424-8247/15/5/576},
volume = {15},
year = {2022}
}

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In vitro evaluation of these hybrid compounds for their antitubercular inhibitory activity against the Mycobacterium tuberculosis H37Rv pMSp12::GPF bioreporter strain was undertaken. Of the 25 tested compounds, 17 exhibited promising anti-TB activities of less than 62.5 µM (MIC90). Specifically, 13 compounds (6b, 6g, 6i–j, 6l, 6o–p, 6r–t, and 6x–y) showed promising activity with MIC90 values in the range of 1–10 µM, while compound 6u, being the most active, exhibited sub-micromolar activity (0.968 µM) in the CAS assay. In addition, minimal cytotoxicity against the HepG2 cell line (cell viability above 75%) in 11 of the 17 compounds, at their respective MIC90 concentrations, was observed, with 6u exhibiting 100% cell viability. The hybridization of the quinoline, urea, and benzothiazole scaffolds demonstrated a synergistic relationship because the activities of resultant hybrids were vastly improved compared to the individual entities. 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