Pharmacokinetics and organ distribution of N-methanocarbathymidine, a novel thymidine analog, in mice bearing tumors transduced with the herpes simplex thymidine kinase gene

Details

Serval ID
serval:BIB_615288793EDB
Type
Article: article from journal or magazin.
Collection
Publications
Title
Pharmacokinetics and organ distribution of N-methanocarbathymidine, a novel thymidine analog, in mice bearing tumors transduced with the herpes simplex thymidine kinase gene
Journal
Cancer Chemother Pharmacol
Author(s)
Noy R., Ben-Zvi Z., Elezra M., Candotti F., Ford Jr H., Morris J. C., Marquez V. E., Johns D. G., Agbaria R.
ISSN
0344-5704 (Print)
ISSN-L
0344-5704
Publication state
Published
Issued date
11/2002
Volume
50
Number
5
Pages
360-6
Language
english
Notes
Noy, Roy
Ben-Zvi, Zvi
Elezra, Miri
Candotti, Fabio
Ford Jr, Harry
Morris, John C
Marquez, Victor E
Johns, David G
Agbaria, Riad
eng
Germany
Cancer Chemother Pharmacol. 2002 Nov;50(5):360-6. Epub 2002 Sep 20.
Abstract
PURPOSE: The conformationally rigid nucleoside, N-methanocarbathymidine [(N)-MCT] exerts a potent antiproliferative effect both in vitro and in vivo against murine colon cancer cells (MC38) expressing the herpes simplex virus thymidine kinase gene (MC38/HSV-tk). Metabolic studies have revealed that high levels of (N)-MCT triphosphate accumulate in transduced cells and are incorporated into DNA, resulting in cell death. The objective of the present study was to assess the pharmacokinetic profile of (N)-MCT in C57BL/6 mice bearing nontransduced MC38 and MC38/HSV-tk tumors. METHODS: Male black C57BL/6 mice bearing subcutaneous tumors derived from wildtype and HSV-tk-transduced MC38 murine colon cancer cells in the left and right flank, respectively, were treated i.p. with radiolabeled (N)-MCT (100 mg/kg). Mice were killed at each of the predetermined times after drug administration. Blood, urine, tumors and various organs and tissues were obtained for measurement of drug levels. RESULTS: Plasma and tissue concentrations of (N)-MCT peaked at 0.25-0.5 h. The major pharmacokinetic parameters calculated for (N)-MCT in plasma were: T(1/2)beta 4.7 h, AUC 147 micro g.h/ml, CL 0.69 l/kg per h. The penetration of (N)-MCT into brain and testes was slow. Between 4 and 24 h after drug administration, the levels of (N)-MCT measured in HSV-tk-expressing tumors were significantly higher than in wildtype tumors. HPLC analysis of methanolic extracts of plasma and urine obtained at various times after drug administration revealed no (N)-MCT metabolites in the plasma, and the compound was secreted unchanged in the urine. CONCLUSIONS: After i.p. injection into mice, (N)-MCT was rapidly absorbed and distributed in all organs examined. No drug metabolites were detectable in plasma and the compound was secreted unchanged in urine. These results are essential for the future development and in postulating the most efficient use of (N)-MCT in the HSV-tk enzyme prodrug system for gene therapy approaches for the treatment of cancer.
Keywords
Adenocarcinoma/*drug therapy/metabolism, Animals, Antimetabolites, Antineoplastic/*pharmacokinetics/therapeutic use, Chromatography, High Pressure Liquid, Colonic Neoplasms/*drug therapy/metabolism, Drug Screening Assays, Antitumor, Enzyme Inhibitors/*pharmacokinetics/therapeutic use, Genetic Therapy, Injections, Intraperitoneal, Male, Mice, Mice, Inbred C57BL, Neoplasm Proteins/antagonists & inhibitors, Neoplasm Transplantation, Prodrugs/*pharmacokinetics/therapeutic use, Simplexvirus/enzymology/genetics, Thymidine/analogs & derivatives/*pharmacokinetics/therapeutic use, Thymidine Kinase/*antagonists & inhibitors, Tissue Distribution, Transfection, Tumor Cells, Cultured/drug effects
Pubmed
Create date
01/11/2017 10:29
Last modification date
20/08/2019 14:18
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