期刊
CTS-CLINICAL AND TRANSLATIONAL SCIENCE
卷 11, 期 4, 页码 435-443出版社
WILEY
DOI: 10.1111/cts.12555
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资金
- National Cancer Institute (NCI) [U01CA070095, UM1CA186691]
- Analytical Pharmacology Core of the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins (National Institutes of Health (NIH)) [P30CA006973, UL1TR001079]
- National Center for Advancing Translational Sciences (NCATS) a component of the NIH [UL1TR 001079]
- NIH Roadmap for Medical Research [UL1TR 001079]
Sorafenib administered at the approved dose continuously is not tolerated long-term in patients with acute myeloid leukemia (AML). The purpose of this study was to optimize the dosing regimen by characterizing the sorafenib exposure-response relationship in patients with AML. A one-compartment model with a transit absorption compartment and enterohepatic recirculation described the exposure. The relationship between sorafenib exposure and target modulation of kinase targets (FMS-like tyrosine kinase 3 (FLT3)-ITD and extracellular signal-regulated kinase (ERK)) were described by an inhibitory maximum effect (E-max) model. Sorafenib could inhibit FLT3-ITD activity by 100% with an IC50 of 69.3ng/mL and ERK activity by 84% with an IC50 of 85.7ng/mL (both adjusted for metabolite potency). Different dosing regimens utilizing 200 or 400mg at varying frequencies were simulated based on the exposure-response relationship. Simulations demonstrate that a 200mg twice daily (b.i.d.) dosing regimen showed similar FLT3-ITD and ERK inhibitory activity compared with 400mg b.i.d. and is recommended in further clinical trials in patients with AML.
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