当前位置： SCI文献检索 > CANCER CHEMOTHERAPY AND PHARMACOLOGY期刊下所有文献 > Pharmacokinetic and phase I study of intravenous DON (6-diazo-5-oxo-L-norleucine) in children.

Pharmacokinetic and phase I study of intravenous DON (6-diazo-5-oxo-L-norleucine) in children.

Abstract：

:DON (6-diazo-5-oxo-L-norleucine), a glutamine antagonist, has been subjected to limited clinical trials since 1957. Use of the drug in adults has been curtailed due to sparse reports of effectiveness as well as its dose-limiting toxicities, i.e., severe nausea, vomiting and mucositis. In earlier studies, children given DON orally in combination with 6-mercaptopurine had significant prolongation of remission of acute leukemias during maintenance therapy. As DON is acid-labile and relatively unstable in solution, oral administration does not appear to be ideal for DON. In the trial described in this report, i.v. DON therapy was studied, using i.v. chlorpromazine to control vomiting, in 20 children, 17 of whom were evaluable following treatment at DON dose levels ranging from 150 mg/m2 to 520 mg/m2. Nausea and vomiting, the dose-limiting toxicity for adults, was controlled with chlorpromazine. Mucositis, which has also been observed in adults, did not occur in the children given DON i.v. A maximum tolerated dose was not defined; however, the projected maximum tolerated dose appears to be in excess of 450 mg/m2. DON was measured in plasma using a rapid-sampling HPLC procedure. The total body clearance, plasma t1/2, and area under the plasma concentration curve (AUC) were calculated using a noncompartmental method. The drug is rapidly cleared from plasma (t 1/2 = 3 h), and its volume of distribution is approximately twice that of total body water in children. These pharmacokinetic data, differ from that of adults reported by others. Specifically, the plasma t 1/2 for children is longer: total body clearance (Cl), and volume of distribution at steady state (Vss) are greater. In addition, no dose dependency of t 1/2, Cl or Vss was observed in this study, and the DON pharmacokinetics were linear and predictable. Five of nine children with acute leukemia showed improvement, though insufficient for classification as partial response, and five of eight children with solid tumors also showed improvement. Further trials using DON in combination with thiopurines or other agents appear indicated.

journal_name

Cancer Chemother Pharmacol

journal_title

Cancer chemotherapy and pharmacology

authors

Sullivan MP,Nelson JA,Feldman S,Van Nguyen B

doi

10.1007/BF00262746

subject

Has Abstract

pub_date

1988-01-01 00:00:00

pages

78-84

issue

eissn

0344-5704

issn

1432-0843

journal_volume

pub_type

杂志文章

在线工具

Pharmacokinetic and phase I study of intravenous DON (6-diazo-5-oxo-L-norleucine) in children.