title: Rechanneling the cardiac proarrhythmia safety paradigm: a meeting report from the Cardiac Safety Research Consortium.
abstract: This white paper provides a summary of a scientific proposal presented at a Cardiac Safety Research Consortium/Health and Environmental Sciences Institute/Food and Drug Administration-sponsored Think Tank, held at Food and Drug Administration's White Oak facilities, Silver Spring, MD, on July 23, 2013, with the intention of moving toward consensus on defining a new paradigm in the field of cardiac safety in which proarrhythmic risk would be primarily assessed using nonclinical in vitro human models based on solid mechanistic considerations of torsades de pointes proarrhythmia. This new paradigm would shift the emphasis from the present approach that strongly relies on QTc prolongation (a surrogate marker of proarrhythmia) and could obviate the clinical Thorough QT study during later drug development. These discussions represent current thinking and suggestions for furthering our knowledge and understanding of the public health case for adopting a new, integrated nonclinical in vitro/in silico paradigm, the Comprehensive In Vitro Proarrhythmia Assay, for the assessment of a candidate drug's proarrhythmic liability, and for developing a public-private collaborative program to characterize the data content, quality, and approaches required to assess proarrhythmic risk in the absence of a Thorough QT study. This paper seeks to encourage multistakeholder input regarding this initiative and does not represent regulatory guidance.
authors.affiliation: Stanford University, Palo Alto, CA. Electronic address: psager@stanford.edu.
authors.forename: Philip T
authors.initials: PT
authors.lastname: Sager
authors.affiliation: AbbVie, North Chicago, IL.
authors.forename: Gary
authors.initials: G
authors.lastname: Gintant
authors.affiliation: Quintiles, Durham, NC.
authors.forename: J Rick
authors.initials: JR
authors.lastname: Turner
authors.affiliation: HESI, Washington, DC.
authors.forename: Syril
authors.initials: S
authors.lastname: Pettit
authors.affiliation: Division of Cardiovascular and Renal Drug Products, FDA, White Oak, MD.
authors.forename: Norman
authors.initials: N
authors.lastname: Stockbridge
mesh_terms: D001145:Arrhythmias, Cardiac / Q000139:chemically induced* / Q000517:prevention & control; D004353:Drug Evaluation, Preclinical / Q000379:methods*; D064420:Drug-Related Side Effects and Adverse Reactions / Q000517:prevention & control; D006801:Humans; D008133:Long QT Syndrome / Q000139:chemically induced / Q000517:prevention & control; D018408:Patch-Clamp Techniques / Q000379:methods*; D018570:Risk Assessment; D016171:Torsades de Pointes / Q000139:chemically induced / Q000517:prevention & control; D014481:United States