Etoposide is a DNA topoisomerase II inhibitor widely used in the treatment of a variety of malignancies that is also associated with therapy-related leukemia. The cytochrome P450 (P450)-derived catechol and quinone metabolites of etoposide may be important in the damage to the MLL (mixed lineage leukemia) gene and other genes resulting in leukemia-associated chromosomal translocations. Kinetic ...

Several specific assays have been developed for the measurement of etoposide in biological fluids. As large samples are required for high sensitivity, these systems are not appropriate for a pediatric practice. In the present study, however, an improved method for the determination of serum levels of the anticancer drug etoposide was developed, using high-performance liquid chromatography with ...

The past 20 years has seen an increasing trend toward the use of oral chemotherapy for the treatment of patients with a variety of malignancies. The advantages of oral chemotherapy include lower treatment cost, compared with that of intravenous (i.v.) administration, and more convenient treatment for patients. Several oral drugs are now used routinely for cancer treatment, and others are under ...

Background: The administration of bleomycin plus etoposide and cisplatin during pregnancy is rare. Materials and Methods: We describe a case with good pregnancy outcome after exposure to these chemotherapeutic agents at the third trimester of pregnancy. Results: Pregnant woman with stage IIIc immature teratoma underwent surgical staging, and received two cycles of bleomycin, etoposide and cispl...

The intracarotid infusion of the antineoplastic compound etoposide enhances blood-brain barrier (BBB) permeability. In a rat model system, the functional reversibility and anatomic sequelae of etoposide induced BBB disruption were investigated. Etoposide, in a dose range from 3.0 to 22.5 mg/kg, was infused into the left internal carotid artery of Sprague-Dawley rats. BBB disruption was evaluate...

Plasma urine, and cerebrospinal fluid etoposide concentrations have been measured in 12 adult patients after administration of high-dose (400 to 800 mg/sq m) etoposide in order to determine the pharmacokinetics of this drug at these elevated dosages. Increasing the drug dosage produced proportionally higher peak plasma etoposide concentrations (27 to 114 micrograms/ml) and total areas under the...

Etoposide is a substrate for P-glycoprotein, CYP3A4, CYP3A5, and UGT1A1. Glucocorticoids modulate CYP3A and P-glycoprotein in preclinical models, but their effect on clinical etoposide disposition is unknown. We studied the pharmacokinetics of etoposide and its catechol metabolite in children with acute lymphoblastic leukemia, along with polymorphisms in CYP3A4, CYP3A5, MDR1, GSTP1, UGT1A1, and...