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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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Prevention of clofilium-induced torsade de pointes by prostaglandin E2 does not involve ATP-dependent k+ channels

Farkas, A. and Coker, Susan J. (2003) Prevention of clofilium-induced torsade de pointes by prostaglandin E2 does not involve ATP-dependent k+ channels. European Journal of Pharmacology, 472 (3). pp. 189-196. ISSN 0014-2999

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Abstract

Drugs that prolong the QT interval can trigger the life-threatening arrhythmia, torsade de pointes, but there is a poor correlation between the extent of QT prolongation and the occurrence of torsade de pointes. The clinical status of a patient may modify the arrhythmogenicity of drugs; thus, we have investigated whether a mediator of fever and inflammation, prostaglandin E2, alters the proarrhythmic effects of clofilium. In pentobarbitone-anaesthetized, open-chest, α-adrenoceptor-stimulated rabbits, prostaglandin E2 0.28, 0.84 and 2.80 nmol kg−1 min−1, infused into the left ventricle, reduced the incidence of torsade de pointes from 50% in controls to 20%, 20% and 0%, respectively (n=10 per group). Pretreatment with glibenclamide (10 μmol kg−1) did not alter the antiarrhythmic effect of prostaglandin E2 (2.80 nmol kg−1 min−1). These results indicate that prostaglandin E2 prevents drug-induced torsade de pointes and that this action of prostaglandin E2 is not mediated via opening of ATP-dependent K+ channels (KATP).