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Epinastine, a nonsedating histamine H1 receptor antagonist, has a negligible effect on HERG channel.

Abstract：

:Terfenadine and astemizole rarely cause cardiac arrhythmias by suppressing the cardiac rapid delayed rectifier K+ channel encoded by the human ether-a-go-go-related gene (HERG). Epinastine, however, has not been reported to have the adverse effect. We have therefore compared the effects of epinastine, terfenadine and astemizole on HERG channels expressed in Xenopus oocytes. Terfenadine and astemizole suppressed the HERG current with IC50 of 431 nM and 69 nM, respectively. In contrast, 100 microM epinastine inhibited the HERG current by only 11+/-2.1%. These results may provide an explanation for the difference in the cardiotoxicity between different nonsedating histamine H1 receptor antagonists.

journal_name

Eur J Pharmacol

journal_title

European journal of pharmacology

authors

Chachin M,Katayama Y,Yamada M,Horio Y,Ohmura T,Kitagawa H,Uchida S,Kurachi Y

doi

10.1016/s0014-2999(99)00375-1

keywords:

subject

Has Abstract

pub_date

1999-06-25 00:00:00

pages

457-60

issue

3

eissn

0014-2999

issn

1879-0712

pii

S0014-2999(99)00375-1

journal_volume

374

pub_type

杂志文章

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