Phase I clinical and pharmacokinetic study of thiotepa administered intraperitoneally in patients with advanced malignancies

Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology
S WadlerP H Wiernik

Abstract

An important subset of malignancies arising in the ovary or digestive organs remains confined to the peritoneal cavity throughout its natural course. These tumors constitute appropriate targets for loco-regional therapy. With this rationale a clinical phase I and pharmacokinetic study of intraperitoneally administered N, N', N'' triethylenethiophosphoramide (thiotepa), an alkylating agent with activity against ovarian carcinoma, was initiated with the objectives of determining the systemic and local toxicities, maximum-tolerated dose, and pharmacokinetic advantage associated with using the drug in this manner. A total of 13 patients received 15 courses of intraperitoneal thiotepa at doses ranging from 30 mg/m2 to 60 mg/m2. The only important systemic toxicity observed was myelosuppression. At 50 mg/m2 two patients developed Eastern Cooperative Oncology Group (ECOG) grade III myelosuppression. At 60 mg/m2, the maximum-tolerated dose, the mean nadir WBC and platelet counts were 2.7 X 10(3)/microliter and 110 X 10(3)/microliter, respectively. There were no instances of vomiting, stomatitis, or alopecia. Pharmacokinetic studies performed in nine patients revealed that thiotepa was rapidly lost from the peritoneal cavity in a biexpo...Continue Reading

Citations

Jan 1, 1990·Cancer Chemotherapy and Pharmacology·C LewisS B Kaye

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