Amido/ureidosubstituted benzenesulfonamides-isatin conjugates as low nanomolar/subnanomolar inhibitors of the tumor-associated carbonic anhydrase isoform XII

Eur J Med Chem. 2016 Mar 3:110:259-66. doi: 10.1016/j.ejmech.2016.01.030. Epub 2016 Jan 20.

Abstract

By using a molecular hybridization approach, two series of amido/ureidosubstituted benzenesulfonamides incorporating substituted-isatin moieties were synthesized. The prepared derivatives were in vitro evaluated for their inhibitory activity against human carbonic anhydrase (hCA, EC 4.2.1.1) I, II (cytosolic) and IX, XII (transmembrane, tumor-associated) isoforms. All these isoforms were inhibited in variable degrees by the sulfonamides reported here. hCA I was inhibited with KIs in the range of 7.9-894 nM, hCA II in the range of 7.5-1645 nM (with one compound having a KI > 10 μM); hCA IX in the range of 5.0-240 nM, whereas hCA XII in the range of 0.47-2.83 nM. As all these isoforms are involved in various pathologies, in which their inhibition can be exploited therapeutically, the derivatives reported here may represent interesting extensions to the field of CA inhibitors of the sulfonamide type.

Keywords: Amido/ureido sulfonamides; Carbonic anhydrase; Isatin; Tumor-associated isoforms.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Benzenesulfonamides
  • Carbonic Anhydrase Inhibitors / chemical synthesis
  • Carbonic Anhydrase Inhibitors / chemistry*
  • Carbonic Anhydrase Inhibitors / pharmacology*
  • Carbonic Anhydrases / metabolism*
  • Humans
  • Isatin / chemical synthesis
  • Isatin / chemistry*
  • Isatin / pharmacology*
  • Protein Isoforms / antagonists & inhibitors
  • Protein Isoforms / metabolism
  • Structure-Activity Relationship
  • Sulfonamides / chemical synthesis
  • Sulfonamides / chemistry*
  • Sulfonamides / pharmacology*
  • Urea / analogs & derivatives
  • Urea / chemical synthesis
  • Urea / pharmacology

Substances

  • Carbonic Anhydrase Inhibitors
  • Protein Isoforms
  • Sulfonamides
  • Isatin
  • Urea
  • Carbonic Anhydrases
  • carbonic anhydrase XII