Abstract
Nicotinic acid has been reported as a potential inhibitor of carbonic anhydrase III enzyme. Carbonic anhydrase III (CAIII) is an emerging new pharmacological target for the management of dyslipidemia and cancer progression. The activity of 6-substituted nicotinic acid analogs against carbonic anhydrase III was studied using a size-exclusion chromatography. The appearance of concentration-dependent vacancy peak was indicative of binding with CAIII. Chromatographic and docking studies revealed that the carboxylic acid of ligand is essential for binding via coordinate bond formation with Zn+2 ion in the enzyme active site. Moreover, the presence of a hydrophobic group, containing a hydrogen bond acceptor, at position 6 of the pyridine improves activity, e.g., 6-(hexyloxy) pyridine-3-carboxylic acid (Ki = 41.6 µM). Utilizing the weak esterase activity of CAIII, the inhibitory mode of 6-substituted nicotinic acid was confirmed.
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Part of this research was conducted during the sabbatical year granted to Dr. Muhammed Alzweiri by the University of Jordan in the academic year 2015/2016.
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Mohammad, H.K., Alzweiri, M.H., Khanfar, M.A. et al. 6-Substituted nicotinic acid analogues, potent inhibitors of CAIII, used as therapeutic candidates in hyperlipidemia and cancer. Med Chem Res 26, 1397–1404 (2017). https://doi.org/10.1007/s00044-017-1825-x
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DOI: https://doi.org/10.1007/s00044-017-1825-x