Abstract
Venetoclax (ABT-199/GDC-0199) is a selective, potent, first-in-class BCL-2 inhibitor that restores apoptosis in cancer cells and has demonstrated clinical efficacy in a variety of hematological malignancies. The objective of this analysis was to characterize the population pharmacokinetics of venetoclax and identify demographic, pathophysiologic, and treatment factors that influence its pharmacokinetics. Plasma concentration samples from 505 subjects enrolled in 8 clinical studies were analyzed using non-linear mixed-effects modeling. Venetoclax plasma concentrations were best described by a two-compartment PK model with first-order absorption and elimination. The terminal half-life in cancer subjects was estimated to be approximately 26 h. Moderate and strong CYP3A inhibitors decreased venetoclax apparent clearance by 19% and 84%, respectively, while weak CYP3A inhibitors and inducers did not affect clearance. Additionally, concomitant rituximab administration was estimated to increase venetoclax apparent clearance by 21%. Gastric acid-reducing agent co-administration had no impact on the rate or extent of venetoclax absorption. Females had 32% lower central volume of distribution when compared to males. Food increased the bioavailability by 2.99- to 4.25-fold when compared to the fasting state. Mild and moderate renal and hepatic impairment, body weight, age, race, weak CYP3A inhibitors and inducers as well as OATP1B1 transporter phenotype and P-gp, BCRP, and OATP1B1/OATP1B3 modulators had no impact on venetoclax pharmacokinetics. Venetoclax showed minimal accumulation with accumulation ratio of 1.30–1.44. In conclusion, the concomitant administration of moderate and strong CYP3A inhibitors and rituximab as well as food were the main factors impacting venetoclax pharmacokinetics, while patient characteristics had only minimal impact.
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The study was sponsored by AbbVie and Genentech/Roche. AbbVie and Genentech contributed to the study design, research, and interpretation of data and the writing, reviewing, and approving of the publication. Venetoclax is being developed in collaboration between AbbVie and Genentech.
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Jones, A.K., Freise, K.J., Agarwal, S.K. et al. Clinical Predictors of Venetoclax Pharmacokinetics in Chronic Lymphocytic Leukemia and Non-Hodgkin’s Lymphoma Patients: a Pooled Population Pharmacokinetic Analysis. AAPS J 18, 1192–1202 (2016). https://doi.org/10.1208/s12248-016-9927-9
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DOI: https://doi.org/10.1208/s12248-016-9927-9