Hyperthermic intraperitoneal doxorubicin: pharmacokinetics, metabolism, and tissue distribution in a rat model

Cancer Chemotherapy and Pharmacology
P JacquetP H Sugarbaker

Abstract

The cytotoxic effect of several anticancer agents, including doxorubicin, can be enhanced by hyperthermia. The purpose of this study was to evaluate the effect of hyperthermia on the pharmacokinetics, metabolism, and tissue distribution of intraperitoneal (i.p.) doxorubicin in a rodent model. Doxorubicin was given i.p. to 20 Sprague-Dawley rats at a dose of 2 mg/kg over 60 min. Rats were randomized into two groups according to the temperature of the peritoneal perfusate: group NT received normothermic (37 degrees C) i.p. doxorubicin; group HT received hyperthermic (43 degrees C) i.p. doxorubicin. During the course of i.p. chemotherapy, peritoneal fluid and blood were sampled every 10 min. At the end of the procedure, rats were sacrificed and tissue samples (liver, spleen, small bowel, omentum, bladder, diaphragm, abdominal wall, heart) were collected. Concentrations of doxorubicin and its aglycone metabolites were determined in peritoneal fluid, plasma, and tissues by HPLC. No significant differences in areas under the curve (AUC) of peritoneal fluid doxorubicin and plasma doxorubicin were found between group NT and group HT. AUC ratios (AUC peritoneal fluid/AUC blood) were 87.9 for group NT and 82.9 for group HT. Group HT exhi...Continue Reading

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