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• W3173455154 abstract "The in vivo correct QT (QTc) assay is used by the pharmaceutical industry to characterize the potential for delayed ventricular repolarization and is a core safety assay mentioned in International Conference on Harmonization (ICH) S7B guideline. The typical telemetry study involves a dose-response analysis of QTc intervals over time using a crossover (CO) design. This method has proven utility but does not include direct integration of pharmacokinetic (PK) data. An alternative approach has been validated and is used routinely in the clinical setting that pairs pharmacodynamic (PD) responses with PK exposure (e.g., concentration-QTc (C-QTc) analysis. The goal of our paper was to compare the QTc sensitivity of two experimental approaches in the conscious dog and non-human primate (NHP) QTc assays. For timepoint analysis, a conventional design using eight animals (8 × 4 CO) to detect moxifloxacin-induced QTc prolongation was compared to a PK/PD design in a subset (N = 4) of the same animals. The findings demonstrate that both approaches are equally sensitive in detecting threshold QTc prolongation on the order of 10 ms. Both QTc models demonstrated linearity in the QTc prolongation response to moxifloxacin dose escalation (6 to 46 ms). Further, comparison with human QTc findings with moxifloxacin showed agreement and consistent translation across the three species: C-QTc slope values were 0.7- (dog) and 1.2- (NHP) fold of the composite human value. In conclusion, our data show that dog and NHP QTc telemetry with an integrated PK arm (C-QTc) has the potential to supplement clinical evaluation and improve integrated QTc risk assessment." @default.
• W3173455154 created "2021-07-05" @default.
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• W3173455154 date "2021-07-14" @default.
• W3173455154 modified "2023-10-16" @default.
• W3173455154 title "Evaluation of moxifloxacin in canine and non‐human primate telemetry assays: Comparison of QTc interval prolongation by timepoint and concentration‐QTc analysis" @default.
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• W3173455154 doi "https://doi.org/10.1111/cts.13103" @default.
• W3173455154 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8604216" @default.
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