Key result
Using physiologically relevant experimental protocols and accounting for active metabolites improved alignment between nonclinical ion channel block profiles and clinical proarrhythmia risk.
Why the study?
Studies under CiPA demonstrated misalignment between nonclinical ion channel data and clinical ECG changes or TdP risk, with data gaps for metabolites needing to be addressed.
Population
hERG, Ca V 1.2, and Na V 1.5 cardiac ion channels
Comparison
Effects of chloroquine, lopinavir, ritonavir, vanoxerine, and parent drugs versus major metabolites
Design
In vitro patch clamp cardiac ion channel assay study
Authors
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May improve proarrhythmia risk prediction from ion channel data; leaves open clinical translation of metabolite-adjusted models.
Using physiologically relevant experimental protocols and accounting for active metabolites improves the translation of nonclinical cardiac ion channel data to clinical proarrhythmia risk.
Baron et al. (2025) studied Drug-induced Torsade de Pointes (TdP) risk. Physiologically relevant experimental protocols (ICH S7B Q&A 2.1 best practices) was evaluated on Ion channel block profiles and alignment with drug-induced ECG changes. Using physiologically relevant experimental protocols and accounting for active metabolites improved alignment between nonclinical ion channel block profiles and clinical proarrhythmia risk.
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