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Population pharmacokinetics of kahalalide F in advanced cancer patients
Miguel-Lillo, B.; Valenzuela, B.; Peris-Ribera, J.E.; Soto-Matos, A.; Perez-Ruixo, J.J. (2015). Population pharmacokinetics of kahalalide F in advanced cancer patients. Cancer Chemother. Pharmacol. 76(2): 365-374. https://dx.doi.org/10.1007/s00280-015-2800-1
In: Cancer Chemotherapy and Pharmacology. Springer: Berlin. ISSN 0344-5704; e-ISSN 1432-0843
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| Trefwoord |
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| Author keywords |
Cancer patients; Clinical trials; Population pharmacokinetics; NONMEM(TM); Kahalalide F |
| Auteurs | | Top |
- Miguel-Lillo, B.
- Valenzuela, B.
- Peris-Ribera, J.E.
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- Soto-Matos, A.
- Perez-Ruixo, J.J.
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| Abstract |
In this study, we characterize the population pharmacokinetics of kahalalide F (KF), a novel marine anticancer drug, after intravenous (i.v.) administration in advanced cancer patients. Data from 240 patients included in three Phase I and three Phase II trials receiving i.v. weekly and every 3 weeks infusions of KF, at doses ranging 266-6650 A mu g/m(2), were analyzed using NONMEM (TM) VII. The effect of demographics and/or pathophysiologically relevant factors on KF pharmacokinetic parameters was evaluated. Model evaluation was conducted using nonparametric bootstrap and visual predictive check (in both internal and external datasets). An open two-compartment model with linear distribution and elimination from central compartment was suitable to describe the data. Volume of distribution at steady state and its between-subject variability (CV%) was estimated to be 6.56 L (28 %). Plasma clearance was estimated to be 6.25 L/h (43 %). Within the range of covariates evaluated, age, weight, body surface area, gender, ECOG performance status, presence of liver metastases, creatinine clearance, alkaline phosphatase, aspartate aminotransferase, alanine aminotransferase, total bilirubin, total protein and serum albumin did not contribute to explain KF pharmacokinetic variability to a significant extent. The developed model was deemed appropriate to describe the time course of KF plasma concentrations and its variability in advanced cancer patients. The integration of pharmacokinetic data from six clinical studies demonstrated KF linear elimination from plasma, dose-proportional exposure and time-independent pharmacokinetics. Based on analyzed data, no clinically relevant covariates were identified as predictors of KF pharmacokinetics. |
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