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Double pharmacological challenge on repolarization opens new avenues for drug safety research
Author(s) -
Thomsen M B
Publication year - 2007
Publication title -
british journal of pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.432
H-Index - 211
eISSN - 1476-5381
pISSN - 0007-1188
DOI - 10.1038/sj.bjp.0707299
Subject(s) - proarrhythmia , torsades de pointes , repolarization , safety pharmacology , drug , pharmacology , medicine , drug development , risk analysis (engineering) , qt interval , cardiology , electrophysiology
The pharmaceutical industry is testing new potential drugs for their propensity to prolong human cardiac repolarization, and regards this as a sign of proarrhythmic risk. Many studies have dethroned the common perception that prolonged repolarization is a reliable surrogate marker for torsades de pointes (TdP) arrhythmia. Both the pharmaceutical industry and the regulatory bodies are neglecting the available proarrhythmia models. In vitro studies have suggested that combined pharmacological hits on repolarization will produce a superior substrate for in vivo proarrhythmia, compared to the single‐drug assessment. By using consecutive pharmacological challenges, a simple model is proposed, in which combinatorial pharmacology is employed to provoke TdP in the conscious dog. The pharmaceutical industry interested in evaluating the proarrhythmic potential of their present and future drugs now has a simple means of doing so. British Journal of Pharmacology (2007) 151 , 909–911; doi: 10.1038/sj.bjp.0707299