Abstract
Background: The necessity for newer anti-microbial medications with prototypes has arisen as a result of the prevalence of infections caused by resistant strains of microorganisms.
Objective: A series of nine novel benzothiazole-linked pyrazole prototype derivatives were synthesized in multistep reactions and evaluated for anti-microbial and anti-fungal activities. The druglikeness along with physicochemical properties of synthesized compounds were determined by docking the ligands with resistant strains.
Methods: Synthesis of benzothiazole and pyrazole prototype derivatives was carried out by a sequence of reactions to attain the hydrazine carboxamide derivatives. All the synthesized compounds were characterized and evaluated for their anti-bacterial and anti-fungal activities against carbapenem-resistantresistant Pseudomonas aeruginosa (CP-PA), carbapenem-resistantresistant Klebsiella pneumoniae (CP-KP), cephalosporin-resistant Clostridium difficile (CR-CD), macrolide- resistantresistant Streptococcus pyogenes (MR-SP), Voriconazole-resistant Aspergillus Niger (VR-AN) and Fluconazole-resistant Candida glabrata (FR-CG). Physico-chemical parameters were done by Medchem DesignerTM software version 5.5 and ADMET parameters by pkCSM online tool. Furthermore, molecular docking was accomplished with PyRx 0.8 by AutoDock Vina program.
Results: All the synthesized derivatives were characterized and evaluated for their anti-bacterial activity, which shows the significant activity of 6i with MIC 36.17 μM on CP-PA, MIC 36.86 μM on CP-KP, MIC 38.45 μM on CR-CD, and MIC 37.09 μM on MR-SP, with respect to ciprofloxacin with an average of MIC 32 μM for all resistant bacterial strains. The prototype derivatives were also evaluated for their anti-fungal activity, in which derivative 6i was found to be significant with MIC 35.27 μM for VR-AN, MIC 34.78 μM for FR-CG, and MIC values of 25.60 μM and 27.08 μM for Nystatin for all fungal-resistant strains. In-silico predicted parameters for synthesized prototype derivatives stood to be drug-like.
Conclusion: From the novel benzothiazole and pyrazole hybrid derivatives, compound 6i was found to be effective for anti-microbial and anti-fungal drugs and hence can be further explored for dual activities. Furthermore, derivatization was made to synthesize further potent derivatives for anti-microbial and anti-fungal treatments.
Keywords: Benzothiazole, Pyrazole, resistant strains, anti-microbial activity, anti-fungal activity, in-silico studies.
Graphical Abstract
[http://dx.doi.org/10.3855/jidc.3573] [PMID: 24518621]
[http://dx.doi.org/10.1093/cid/ciu392] [PMID: 25151481]
[http://dx.doi.org/10.1093/cid/ciz830] [PMID: 31724043]
[http://dx.doi.org/10.2147/IJGM.S214305] [PMID: 31819594]
[http://dx.doi.org/10.1177/2049936115622891] [PMID: 26862400]
[http://dx.doi.org/10.1586/14787210.2015.1023292] [PMID: 25746210]
[http://dx.doi.org/10.1039/C6NJ03181A]
[http://dx.doi.org/10.1016/S0960-894X(99)00169-9] [PMID: 10340615]
[http://dx.doi.org/10.1002/jps.2600810910] [PMID: 1432635]
[http://dx.doi.org/10.1021/jm960803q] [PMID: 9135032]
[http://dx.doi.org/10.1021/jm900179y] [PMID: 19527048]
[http://dx.doi.org/10.1016/j.bmc.2008.10.023] [PMID: 18952442]
[http://dx.doi.org/10.1021/jm960444z] [PMID: 8831758]
[http://dx.doi.org/10.1080/14756366.2020.1742116] [PMID: 32216479]
[http://dx.doi.org/10.2174/13895575113139990078] [PMID: 23937232]
[http://dx.doi.org/10.1016/j.ejmech.2012.12.057] [PMID: 23385092]
[http://dx.doi.org/10.1016/j.bmcl.2013.06.042] [PMID: 23850201]
[http://dx.doi.org/10.1016/S0960-894X(02)01006-5] [PMID: 12639552]
[http://dx.doi.org/10.3998/ark.5550190.0009.815]
[PMID: 20210079]
[http://dx.doi.org/10.2478/v10007-008-0007-2] [PMID: 18515224]
[http://dx.doi.org/10.1042/BJ20070692] [PMID: 17714074]
[http://dx.doi.org/10.1021/jm901112f] [PMID: 19817445]
[http://dx.doi.org/10.2174/138955706777435706] [PMID: 16787373]
[http://dx.doi.org/10.1021/jm9600959] [PMID: 8765521]
[http://dx.doi.org/10.1016/S0196-4399(01)88009-0]
[http://dx.doi.org/10.1007/978-1-4939-2269-7_19] [PMID: 25618350]
[http://dx.doi.org/10.1021/bi700300u] [PMID: 17441734]
[http://dx.doi.org/10.1021/acsinfecdis.8b00246] [PMID: 30427656]
[http://dx.doi.org/10.1016/j.bbrc.2016.08.097] [PMID: 27545603]
[http://dx.doi.org/10.1038/srep09449] [PMID: 25801974]
[http://dx.doi.org/10.1016/j.ddtec.2004.11.007] [PMID: 24981612]