Indisulam is synthetic sulfonamide compound. In vitro and in vivo studies point out that indisulam prevents retinoblastoma protein phosphorylation. Also, it inhibits cyclins A and B1 activity. Indisulam is known to promote apoptosis. Indisulam is a potent inhibitor of cellular dehydrogenases and thus, is likely to interfere with metabolic pathways such as malate-aspartate shuttle, glycolysis and gluconeogenesis.
Indisulam is a carbonic anhydrase inibitor and Antitumor CDK inhibitor. Indisulam targets the G1 phase of the cell cycle by depleting cyclin E. inducing p53 and p21, and inhibiting CDK2, causing a blockade in the G1/S transition.