title: [Populational pharmacokinetics of doxorubicin applied to personalised its dosing in cancer patients].
abstract: OBJECTIVE
  To develop and internally validate a population pharmacokinetic model for doxorubicin and to evaluate its predictive performance for dose individualization in cancer patients.
  
  
  METHODS
  Doxorubicin plasma concentrations were determined in thirty-three cancer patients treated with intravenous doxorubicin. A three-compartment pharmacokinetic model was implemented in the NONMEN VI programme to determine the doxorubicin pharmacokinetic parameters. The identifiability of the parameters was assessed by parametric bootstrap and model validation was performed using nonparametric bootstrap, visual predictive check, and numerical predictive check. The final model's predictive performance was evaluated in terms of accuracy and precision of plasma concentration predictions during the first and second cycles of chemotherapy.
  
  
  RESULTS
  Doxorubicin clearance was 58.8 L/h, with interpatient variability of 29.2% and intrapatient variability of 18.9%. The estimated volume of distribution at steady state was 2294 L, with inter-and intrapatient variability of 7.3% and 26.1%, respectively. Internal validation confirmed that the population pharmacokinetic model is appropriate to describe the time course of the doxorubicin plasma concentrations and its variability in this population. The accuracy and precision of an a posteriori prediction of doxorubicin plasma concentrations improved by 63% and 41% compared to the a priori prediction.
  
  
  CONCLUSIONS
  The Bayesian population pharmacokinetic model characterised the time course of doxorubicine plasma concentrations and can be accurately and precisely used to optimise doxorubicine dosing regimens in cancer patients.
authors: Plataforma de Oncología, USP, Hospital San Jaime, Torrevieja, Alicante, España.
authors: V
authors: V
authors: Escudero-Ortiz
authors: A
authors: A
authors: Ramón-López
authors: M A J
authors: MA
authors: Duart
authors: J J
authors: JJ
authors: Pérez-Ruixo
authors: B
authors: B
authors: Valenzuela
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000903:Antibiotics, Antineoplastic / Q000008:administration & dosage* / Q000493:pharmacokinetics*; D001499:Bayes Theorem; D004305:Dose-Response Relationship, Drug; D004317:Doxorubicin / Q000008:administration & dosage* / Q000493:pharmacokinetics*; D005260:Female; D006801:Humans; D007275:Injections, Intravenous; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D009369:Neoplasms / Q000188:drug therapy*; D057285:Precision Medicine; D015203:Reproducibility of Results; D055815:Young Adult
chemical_list: D000903:Antibiotics, Antineoplastic; D004317:Doxorubicin