Abstract:
:Effects of therapeutic and supratherapeutic concentrations of bosutinib, a dual Src/Abl tyrosine kinase inhibitor, on the corrected QT interval (QTc) in 60 healthy adults were assessed, according to ICH-E14 guidelines, in this 2-part, randomized, single-dose, double-blind, crossover, placebo- and open-label moxifloxacin-controlled study. Subjects received placebo, moxifloxacin and bosutinib 500 mg with food (therapeutic) in Part 1. In Part 2, subjects received placebo and bosutinib 500 mg plus ketoconazole (supratherapeutic). ANOVA compared baseline-adjusted QTc for bosutinib with placebo; and bosutinib plus ketoconazole with placebo plus ketoconazole. Primary endpoint was population-specific QT correction (QTcN). Secondary endpoints were Bazett QT correction (QTcB), Fridericia's formula QT correction (QTcF) and individual QT correction (QTcI). Upper bounds for 90% confidence intervals were <10 msec for the mean change in QTcN from placebo at all postdose time points, suggesting that mean therapeutic exposures (C(max) , 114 ng/mL; AUC, 2,330 ng · h/mL) and mean supratherapeutic exposures (C(max) , 326 ng/mL; AUC, 15,200 ng · h/mL) were not associated with QTc changes. Similar results were obtained for QTcB, QTcF and QTcI. No clinically relevant pharmacokinetic/pharmacodynamic relationship was observed between bosutinib concentrations and QTc. No subjects had QTcB, QTcF, QTcI or QTcN >450 msec or change from baseline >30 msec. In summary, therapeutic and supratherapeutic bosutinib exposures are not associated with QTc prolongation in healthy adults.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Abbas R,Hug BA,Leister C,Sonnichsen Ddoi
10.1002/ijc.27348subject
Has Abstractpub_date
2012-08-01 00:00:00pages
E304-11issue
3eissn
0020-7136issn
1097-0215journal_volume
131pub_type
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journal_title:International journal of cancer
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