Deconvoluting kinase inhibitor induced cardiotoxicity

Lamore, S. D. et al. (2017) Deconvoluting kinase inhibitor induced cardiotoxicity. Toxicological Sciences, 158(1), pp. 213-226. (doi: 10.1093/toxsci/kfx082) (PMID:28453775)

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Many drugs designed to inhibit kinases have their clinical utility limited by cardiotoxicity-related label warnings or prescribing restrictions. While this liability is widely recognized, designing safer kinase inhibitors (KI) requires knowledge of the causative kinase(s). Efforts to unravel the kinases have encountered pharmacology with nearly prohibitive complexity. At therapeutically relevant concentrations, KIs show promiscuity distributed across the kinome. Here, to overcome this complexity, 65 KIs with known kinome-scale polypharmacology profiles were assessed for effects on cardiomyocyte (CM) beating. Changes in human iPSC-CM beat rate and amplitude were measured using label-free cellular impedance. Correlations between beat effects and kinase inhibition profiles were mined by computation analysis (Matthews Correlation Coefficient) to identify associated kinases. Thirty kinases met criteria of having (1) pharmacological inhibition correlated with CM beat changes, (2) expression in both human-induced pluripotent stem cell-derived cardiomyocytes and adult heart tissue, and (3) effects on CM beating following single gene knockdown. A subset of these 30 kinases were selected for mechanistic follow up. Examples of kinases regulating processes spanning the excitation–contraction cascade were identified, including calcium flux (RPS6KA3, IKBKE) and action potential duration (MAP4K2). Finally, a simple model was created to predict functional cardiotoxicity whereby inactivity at three sentinel kinases (RPS6KB1, FAK, STK35) showed exceptional accuracy in vitro and translated to clinical KI safety data. For drug discovery, identifying causative kinases and introducing a predictive model should transform the ability to design safer KI medicines. For cardiovascular biology, discovering kinases previously unrecognized as influencing cardiovascular biology should stimulate investigation of underappreciated signaling pathways.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Smith, Professor Godfrey
Authors: Lamore, S. D., Ahlberg, E., Boyer, S., Lamb, M. L., Hortigon-Vinagre, M. P., Rodriguez, V., Smith, G. L., Sagemark, J., Carlsson, L., Bates, S. M., Choy, A. L., Stålring, J., Scott, C. W., and Peters, M. F.
College/School:College of Medical Veterinary and Life Sciences > School of Cardiovascular & Metabolic Health
Journal Name:Toxicological Sciences
Publisher:Oxford University Press
ISSN (Online):1096-0929
Published Online:26 May 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Toxicological Sciences 158(1):213-226
Publisher Policy:Reproduced under a Creative Commons License

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