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FEBS Lett. 1990 Jul 30;268(1):79-82.

Flufenamic acid, mefenamic acid and niflumic acid inhibit single nonselective cation channels in the rat exocrine pancreas.

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Max-Planck-Institut für Biophysik, Frankfurt/Main, FRG.


The non-steroidal anti-inflammatory drugs, flufenamic acid, mefenamic acid and niflumic acid, block Ca2(+)-activated non-selective cation channels in inside-out patches from the basolateral membrane of rat exocrine pancreatic cells. Half-maximal inhibition was about 10 microM for flufenamic acid and mefenamic acid, whereas niflumic acid was less potent (IC50 about 50 microM). Indomethacin, aspirin, diltiazem and ibuprofen (100 microM) had not effect. It is concluded that the inhibitory effect of flufenamate, mefenamate and niflumate is dependent on the specific structure, consisting of two phenyl rings linked by an amino bridge.

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