期刊
BIOORGANIC & MEDICINAL CHEMISTRY
卷 16, 期 15, 页码 7489-7493出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmc.2008.06.005
关键词
water transport; aquaporin; AQP4; antiepileptics; carbonic anhydrase
资金
- National Institutes of Health [DK35124, EY13574, HL59198, EB00415, DK72517, HL73856]
- Cystic Fibrosis Foundation
Inhibitors of brain glial water channel aquaporin-4 (AQP4) are of potential clinical utility, as they are predicted to modulate brain edema, neuroexcitation and glial scarring. Recently, Huber et al. (Bioorg. Med. Chem. 2007, 17, 1270-1273; in press) reported that a series of arylsulfonamides, antiepileptics, and related small molecules strongly inhibited AQP4 water transport with IC(50)s down to 1 mu M. We retested the compounds with greatest reported potencies, including acetylsulfanilamide, acetazolamide, 6-ethoxybenzothiazole-2- sulfonamide, topiramate, zonisamide, phenytoin, lamotrigine, and sumatriptan, in AQP4-transfected mammalian cells and primary cultures of brain glial cells, using several sensitive assays of osmotic water permeability. Contrary to the findings of Huber et al., in our studies we found no significant inhibition of AQP4 water permeability by any of the compounds at concentrations up to 100 mu M. (C) 2008 Elsevier Ltd. All rights reserved.
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