Synthesis of bulky-tailed sulfonamides incorporating pyrido[2,3-d][1,2,4]triazolo[4,3-a]pyrimidin-1(5H)-yl) moieties and evaluation of their carbonic anhydrases I, II, IV and IX inhibitory effects

Bioorg Med Chem. 2017 Apr 1;25(7):2210-2217. doi: 10.1016/j.bmc.2017.02.037. Epub 2017 Feb 21.

Abstract

Using celecoxib as lead, two novel series of sulfonamides incorporating the pyridotriazolopyrimidine scaffold have been synthesized and evaluated in vitro as inhibitors against four relevant human (h) carbonic anhydrases (CAs, EC 4.2.1.1), the cytosolic and ubiquitous hCA I and II as well as the transmembrane hCA IV and hCA IX. Most of the reported sulfonamides acted as efficient, low micromolar inhibitors of hCAI, II and IV, whereas they displayed higher efficacy in inhibiting the tumor-associated isoform hCA IX. Many derivates herein reported showed better hCA IX versus hCA II selectivity ratios compared to celecoxib or acetazolamide. Considering isoform IX is a validated target for the diagnosis and treatment of hypoxic tumors, discovery of selective CA IX inhibitors represents a promising step to unveil more effective anticancer therapies.

Keywords: Carbonic anhydrase; Celecoxib; Pyridotriazolopyrimidine; Sulfonamide; Tumor-associated isoforms.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbon-13 Magnetic Resonance Spectroscopy
  • Carbonic Anhydrase Inhibitors / chemical synthesis*
  • Carbonic Anhydrase Inhibitors / chemistry
  • Carbonic Anhydrase Inhibitors / pharmacology*
  • Carbonic Anhydrases / drug effects
  • Chromatography, Thin Layer
  • Drug Evaluation, Preclinical
  • Humans
  • Isoenzymes / antagonists & inhibitors
  • Proton Magnetic Resonance Spectroscopy
  • Spectrophotometry, Ultraviolet
  • Sulfonamides / chemical synthesis*
  • Sulfonamides / chemistry
  • Sulfonamides / pharmacology*

Substances

  • Carbonic Anhydrase Inhibitors
  • Isoenzymes
  • Sulfonamides
  • Carbonic Anhydrases