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  • Title: Plasma and tumor concentrations of cisplatin following intraperitoneal infusion or bolus injection with or without continuous low-dose-rate irradiation.
    Author: Fu KK, DeGregorio MW, Phillips JW.
    Journal: NCI Monogr; 1988; (6):123-7. PubMed ID: 3281027.
    Abstract:
    Our purpose of this study was to determine whether whole-body, continuous low-dose-rate irradiation (CLDRI) alters the plasma and/or tumor platinum pharmacokinetics after ip bolus injection or ip infusion as a possible mechanism of interaction between CLDRI and cisplatin. The C3Hf/Sed mice bearing SCCVII/SF tumors were given 6 mg cisplatin/kg ip by bolus injection or an ip infusion of 0.25 mg cisplatin.kg-1.hour-1 for 48 hours with and without CLDRI at 0.56 Gy/hr for 24 or 48 hours. Plasma and tumor platinum concentrations were determined with an atomic absorption spectrophotometer at appropriate intervals during infusion and up to 48 hours after drug administration. Both total and ultrafilterable plasma platinum followed a biphasic elimination after ip bolus injection, whereas only a prolonged single-phase elimination was seen after ip infusion. Tumor uptake of platinum appeared to follow a passive diffusion pattern with a prolonged cellular retention of platinum. Whole-body CLDRI had no apparent effect on the pharmacokinetics of plasma and tumor platinum administered by ip bolus injection or prolonged continuous infusion.
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