Abstract | PURPOSE: To develop a population pharmacokinetic (PK) model for cabazitaxel in patients with advanced solid tumors and examine the influence of demographic and baseline parameters. METHODS: One hundred and seventy patients who received cabazitaxel (10-30 mg/m(2), 1-h IV infusion) every 7 or 21 days in five Phase I-III studies were analyzed by non-linear mixed-effect modeling (NONMEM VI). Model evaluation comprised non-parametric bootstrap and visual predictive checks. RESULTS:
Cabazitaxel PK was best described by a linear three-compartment model with: first-order elimination; interindividual variability on clearance (CL), central volume of distribution (V1), and all intercompartmental rate constants except K21; interoccasion variability in CL and V1; proportional residual error of 27.8%. Cabazitaxel CL was related to body surface area (BSA) and tumor type ( breast cancer; finding confounded by study). Typical CL for a non- breast cancer patient with a BSA of 1.84 m(2) was 48.5 L/h, with V1 26.0 L, steady-state volume of distribution 4,870 L and alpha, beta, and gamma half-lives of 4.4 min, 1.6, and 95 h, respectively. Sex, height, weight, age, Caucasian race, renal/hepatic function, and cytochrome P450 inducer use did not significantly further explain the PK of cabazitaxel. Bootstrap and posterior predictive checks confirmed the adequacy of the model. CONCLUSIONS:
Cabazitaxel PK appears unaffected by most baseline patient factors, and the influence of BSA on CL is addressed in practice by BSA-dependent doses. This analysis suggests consistent cabazitaxel PK and exposure across most solid tumor types, although the potential influence of breast cancer on CL requires further confirmation.
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Authors | Géraldine M Ferron, Yang Dai, Dorothée Semiond |
Journal | Cancer chemotherapy and pharmacology
(Cancer Chemother Pharmacol)
Vol. 71
Issue 3
Pg. 681-92
(Mar 2013)
ISSN: 1432-0843 [Electronic] Germany |
PMID | 23299792
(Publication Type: Clinical Trial, Phase I, Clinical Trial, Phase II, Clinical Trial, Phase III, Journal Article)
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Chemical References |
- Antineoplastic Agents, Phytogenic
- Taxoids
- cabazitaxel
- Cytochrome P-450 Enzyme System
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Topics |
- Adult
- Aged
- Aged, 80 and over
- Algorithms
- Antineoplastic Agents, Phytogenic
(pharmacokinetics, therapeutic use)
- Bayes Theorem
- Body Surface Area
- Cytochrome P-450 Enzyme System
(metabolism)
- Data Interpretation, Statistical
- Drug Resistance, Neoplasm
- Enzyme Induction
(physiology)
- Female
- Half-Life
- Humans
- In Situ Hybridization
- Linear Models
- Male
- Middle Aged
- Neoplasms
(drug therapy, metabolism)
- Nonlinear Dynamics
- Racial Groups
- Taxoids
(pharmacokinetics, therapeutic use)
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