Bioorganic Chemistry p. 425 - 432 (2018)
Update date:2022-08-28
Topics:
Eldehna, Wagdy M.
Nocentini, Alessio
Al-Rashood, Sara T.
Hassan, Ghada S.
Alkahtani, Hamad M.
Almehizia, Abdulrahman A.
Reda, Ahmed M.
Abdel-Aziz, Hatem A.
Supuran, Claudiu T.
Three series of indolinone-based sulfonamides (3a–f, 6a–f and 9a–f) were in vitro evaluated as inhibitors of the tumor-associated carbonic anhydrase (CA, EC 4.2.1.1) isoforms hCA IX and XII, using a stopped-flow CO2 hydrase assay. All the investigated sulfonamides displayed single- or double-digit nanomolar inhibitory activities towards both hCA IX (KIs: 6.2–64.8 nM) and XII (KIs: 7.1–55.6 nM) isoforms. All sulfonamides (3a–f, 6a–f and 9a–f) were in vitro examined for their potential anticancer activity against colorectal cancer HCT-116 and breast cancer MCF-7 cell lines. Sulfonamide 9e was found to be the most potent counterpart against HCT-116 (IC50 = 3.67 ± 0.33 μM). Sulfonamide 9e displayed good selectivity profile for inhibition of the tumor-associated isoforms (CAs IX & XII) over the off-target cytosolic CAs I and II. 9e was screened for cell cycle disturbance and apoptosis induction in HCT-116 cells. It was found to persuade cell cycle arrest at G2-M stage as well as alter the Sub-G1 phase. Also, 9e induced the intrinsic apoptotic mitochondrial pathway in HCT-116 cells via down-regulation of the anti-apoptotic protein Bcl-2 level with concurrent boosting the pro-apoptotic Bax, caspase-9, caspase-3, cytochrome C and p53 levels.
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