Carbonic anhydrase inhibitors: benzenesulfonamides incorporating cyanoacrylamide moieties are low nanomolar/subnanomolar inhibitors of the tumor-associated isoforms IX and XII.

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Alafeefy AM, Isik S, Abdel-Aziz HA, Ashour AE, Vullo D, Al-Jaber NA, Supuran CT

Carbonic anhydrase inhibitors: benzenesulfonamides incorporating cyanoacrylamide moieties are low nanomolar/subnanomolar inhibitors of the tumor-associated isoforms IX and XII.

Bioorg Med Chem. 2013 Mar 15;21(6):1396-403. doi: 10.1016/j.bmc.2012.12.004. Epub 2013 Jan 2.

PubMed ID

23290254 [ View in PubMed

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Abstract

A series of benzenesulfonamides incorporating cyanoacrylamide moieties (tyrphostine analogues) have been obtained by reaction of sulfanilamide with ethylcyanoacetate followed by condensation with aromatic/heterocyclic aldehydes, isothiocyanates or diazonium salts. The new compounds have been investigated as inhibitors of the metalloenzyme carbonic anhydrase (CA, EC 4. 2.1.1), and more specifically against the cytosolic human (h) isoforms hCA I and II, as well as the transmembrane, tumor-associated ones CA IX and XII, which are validated antitumor targets. Most of the new benzenesulfonamides were low nanomolar or subnanomolar CA IX/XII inhibitors whereas they were less effective as inhibitors of CA I and II. The structure-activity relationship for this class of effective CA inhibitors is also discussed. Generally, electron donating groups in the starting aldehyde reagent favored CA IX and XII inhibition, whereas halogeno, methoxy and dimethylamino moieties led to very potent CA XII inhibitors.

DrugBank Data that Cites this Article

Binding Properties

Drug	Target	Property	Measurement	pH	Temperature (°C)
Acetazolamide	Carbonic anhydrase 1	Ki (nM)	250	N/A	N/A	Details
Acetazolamide	Carbonic anhydrase 12	Ki (nM)	5.7	N/A	N/A	Details
Acetazolamide	Carbonic anhydrase 2	Ki (nM)	12	N/A	N/A	Details