Carbonic anhydrase inhibitors: E7070, a sulfonamide anticancer agent, potently inhibits cytosolic isozymes I and II, and transmembrane, tumor-associated isozyme IX.
Article Details
- CitationCopy to clipboard
Abbate F, Casini A, Owa T, Scozzafava A, Supuran CT
Carbonic anhydrase inhibitors: E7070, a sulfonamide anticancer agent, potently inhibits cytosolic isozymes I and II, and transmembrane, tumor-associated isozyme IX.
Bioorg Med Chem Lett. 2004 Jan 5;14(1):217-23.
- PubMed ID
- 14684331 [ View in PubMed]
- Abstract
E7070 [N-(3-chloro-7-indolyl)-1,4-benzenedisulfonamide] is an anticancer drug candidate under clinical development for the treatment of several types of cancers. We prove here that this compound also acts as a potent carbonic anhydrase (CA) inhibitor. Similarly to the clinically used drugs acetazolamide, methazolamide and topiramate, E7070 showed inhibition constants in the range of 15-31nM against isozymes I, II and IX, being slightly less effective as a CA IV inhibitor (K(i) of 65nM). The X-ray crystal structure of the adduct of hCA II with E7070 revealed unprecedented interactions between the inhibitor and the active site, with three different conformations of the chloroindole fragment of the inhibitor interacting with different amino acid residues/water molecules of the enzyme. A superimposition of these conformations with those of other sulfonamide/sulfamate CA inhibitors indicated that similar regions of the hCA II active site could be involved in the interaction with inhibitors.
DrugBank Data that Cites this Article
- Drug Targets
Drug Target Kind Organism Pharmacological Action Actions Topiramate Carbonic anhydrase 4 Protein Humans YesInhibitorDetails - Binding Properties
Drug Target Property Measurement pH Temperature (°C) Acetazolamide Carbonic anhydrase 1 Ki (nM) 250 N/A N/A Details Acetazolamide Carbonic anhydrase 2 Ki (nM) 12 N/A N/A Details Topiramate Carbonic anhydrase 1 Ki (nM) 250 N/A N/A Details Topiramate Carbonic anhydrase 2 Ki (nM) 5 N/A N/A Details