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Título: | Comparative effects of nonsedating histamine H1 receptor antagonists, ebastine and terfenadine, on human Kv1.5 channels |
Autor: | Valenzuela, Carmen CSIC ORCID CVN; Delpón, Eva; Franqueza, Laura; Gay, Pilar; Vicente, Javier; Tamargo, Juan | Fecha de publicación: | 1997 | Editor: | Elsevier | Citación: | European Journal of Pharmacology 326(2-3): 257-263 (1997) | Resumen: | The effects of ebastine and terfenadine, long-acting nonsedating histamine H1 receptor antagonists, were studied on hKv1.5 channels using the whole-cell voltage-clamp configuration of the patch-clamp technique in Ltk- cells transfected with the gene encoding the hKv1.5 channel. Upon depolarization to +60 mV, terfenadine, 1 μM and 3 μM, inhibited the hKv1.5 current by 42.4 ± 6.4% and 69.3 ± 4.2% (P < 0.01). In contrast, at the same range of concentrations, ebastine-induced inhibition of this K+ current averaged 6.5 ± 2.0% and 13.0 ± 2.0 (P < 0.05). At the highest concentration tested (3 μM) neither terfenadine carboxylate nor carebastine significantly modified hKv1.5 current. All these results suggest that ebastine could represent a safer alternative to terfenadine in the clinical practice. | URI: | http://hdl.handle.net/10261/79183 | DOI: | 10.1016/S0014-2999(97)85421-0 | Identificadores: | doi: 10.1016/S0014-2999(97)85421-0 issn: 0014-2999 e-issn: 1879-0712 |
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