Journal
JOURNAL OF ENZYME INHIBITION AND MEDICINAL CHEMISTRY
Volume 30, Issue 6, Pages 901-907Publisher
TAYLOR & FRANCIS LTD
DOI: 10.3109/14756366.2014.986118
Keywords
Carbonic anhydrase; cytosolic/tumor-associated enzymes; isoform-selective inhibitor; Schiff's base; sulfonamide
Funding
- FP7 EU project, Metoxia
- FP7 EU project, Dynano
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A series of new Schiff's bases was obtained from the sulfanilamide semicarbazone (4-aminosulfonylphenyl semicarbazide) and aromatic/heterocyclic aldehydes. The new compounds were designed to incorporate moieties known to induce effective inhibitory activity against carbonic anhydrase (CA, EC 4.2.1.1) isoforms involved in crucial physiologic or pathologic processes such as the cytosolic CA I and II or the transmembrane, tumor-associated CA IX and XII: the compounds were medium potency - weak CA I inhibitors, highly effective, low nanomolar CA II inhibitors, but few of them inhibited effectively CA IX and XII. This may probably due to the long spacer between the sulfamoylphenyl and imine fragments of the molecules, which probably induces a highly flexible conformation of the inhibitor bound to the active site of the enzyme, with destabilizing effects for the adduct. The detailed structure activity relationship for this class of inhibitors is discussed.
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