Abstract
1 The pharmacokinetics of cytosine arabinoside were studied after a single i.v. bolus of 2 mg/kg ara-C in patients with newly diagnosed untreated AML, using a bioassay and GC-MS method to measure the plasma concentrations. 2 Most patients showed a bi- or tri-phasic decline in plasma concentrations with time. Plasma clearance was 3.9 to 18.1 l/min as measured by the GC-MS method, and terminal half-lives varied from 7--107 min. 3 There was poor correlation of the GC-MS assay with the bioassay, probably because the latter was interfered with by the release of endogenous nucleosides from blasts after after ara-C. 4 Plasma concentrations were measured by GC-MS during continuous infusions in 14 patients. Plasma clearances were much lower than after a bolus, 0.39 to 5.25 l/min. 5 There was no correlation of response (remission or fall in peripheral blast count) with exposure to ara-C calculated from infusion dose, clearance and duration of infusion. 6 This study shows that ara-C pharmacokinetics varies markedly from patient to patient and that there is a wide range in the plasma concentrations associated with therapeutic response.
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Selected References
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- Baguley B. C., Falkenhaug E. M. Plasma half-life of cytosine arabinoside (NSC-63878) in patients treated for acute myeloblastic leukemia. Cancer Chemother Rep. 1971 Jun;55(3):291–298. [PubMed] [Google Scholar]
- Bodey G. P., Coltman C. A., Hewlett J. S., Freireich E. J. Progress in the treatment of adults with acute leukemia: review of regimens containing cytarabine studied by the Southwest Oncology Group. Arch Intern Med. 1976 Dec;136(12):1383–1388. [PubMed] [Google Scholar]
- Boutagy J., Harvey D. J. Determination of cytosine arabinoside in human plasma by gas chromatography with a nitrogen-sensitive detector and by gas chromatography--mass spectrometry. J Chromatogr. 1978 Sep 1;146(2):283–296. doi: 10.1016/s0378-4347(00)81894-0. [DOI] [PubMed] [Google Scholar]
- CAESAR J., SHALDON S., CHIANDUSSI L., GUEVARA L., SHERLOCK S. The use of indocyanine green in the measurement of hepatic blood flow and as a test of hepatic function. Clin Sci. 1961 Aug;21:43–57. [PubMed] [Google Scholar]
- CULBERTSON J. W., WILKINS R. W., INGELFINGER F. J., BRADLEY S. E. The effect of the upright posture upon hepatic blood flow in normotensive and hypertensive subjects. J Clin Invest. 1951 Mar;30(3):305–311. doi: 10.1172/JCI102445. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Camiener G. W. Studies of the enzymatic deamination of ara-cytidine. V. inhibition in vitro and in vivo by tetrahydrouridine and other reduced pyrimidine nucleosides. Biochem Pharmacol. 1968 Sep;17(9):1981–1991. doi: 10.1016/0006-2952(68)90114-7. [DOI] [PubMed] [Google Scholar]
- Camiener G. W. Studies of the enzymatic deamination of cytosine arabinoside. II. Properties of the deaminase of human liver. Biochem Pharmacol. 1967 Sep 9;16(9):1681–1689. doi: 10.1016/0006-2952(67)90243-2. [DOI] [PubMed] [Google Scholar]
- Chou T. C., Arlin Z., Clarkson B. D., Phillips F. S. Metabolism of 1-beta-D-arabinofuranosylcytosine in human leukemic cells. Cancer Res. 1977 Oct;37(10):3561–3570. [PubMed] [Google Scholar]
- Chu M. Y. Incorporation of arabinosyl cytosine into 2-7S ribonucleic acid and cell death. Biochem Pharmacol. 1971 Aug;20(8):2057–2063. doi: 10.1016/0006-2952(71)90406-0. [DOI] [PubMed] [Google Scholar]
- Chuang R. Y., Chuang L. F. Inhibition of RNA polymerase as a possible anti-leukaemic action of cytosine arabinoside. Nature. 1976 Apr 8;260(5551):549–550. doi: 10.1038/260549a0. [DOI] [PubMed] [Google Scholar]
- Finklestein J. Z., Scher J., Karon M. Pharmacologic studies of tritiated cytosine arabinoside (NSC-63878) in children. Cancer Chemother Rep. 1970 Feb;54(1):35–39. [PubMed] [Google Scholar]
- Furth J. J., Cohen S. S. Inhibition of mammalian DNA polymerase by the 5'-triphosphate of 1-beta-d-arabinofuranosylcytosine and the 5'-triphosphate of 9-beta-d-arabinofuranoxyladenine. Cancer Res. 1968 Oct;28(10):2061–2067. [PubMed] [Google Scholar]
- Gillette J. R. Factors affecting drug metabolism. Ann N Y Acad Sci. 1971 Jul 6;179:43–66. doi: 10.1111/j.1749-6632.1971.tb46890.x. [DOI] [PubMed] [Google Scholar]
- Graham F. L., Whitmore G. F. Studies in mouse L-cells on the incorporation of 1-beta-D-arabinofuranosylcytosine into DNA and on inhibition of DNA polymerase by 1-beta-D-arabinofuranosylcytosine 5'-triphosphate. Cancer Res. 1970 Nov;30(11):2636–2644. [PubMed] [Google Scholar]
- Greenberg P. L., VanKersen I., Mosny S. Cytotoxic effects of 1-beta-D-arabinofuranosylcytosine and 6-thioguanine in vitro on granulocytic progenitor cells. Cancer Res. 1976 Dec;36(12):4412–4417. [PubMed] [Google Scholar]
- Harris A. L., Grahame-Smith D. G. A study in the guinea-pig of the pharmacokinetics and pharmacodynamics of cytosine arabinoside [proceedings]. Br J Pharmacol. 1978 Mar;62(3):440P–441P. [PMC free article] [PubMed] [Google Scholar]
- Ho D. H. Distribution of kinase and deaminase of 1-beta-D-arabinofuranosylcytosine in tissues of man and mouse. Cancer Res. 1973 Nov;33(11):2816–2820. [PubMed] [Google Scholar]
- Ho D. H., Frei E., 3rd Clinical pharmacology of 1-beta-d-arabinofuranosyl cytosine. Clin Pharmacol Ther. 1971 Nov-Dec;12(6):944–954. doi: 10.1002/cpt1971126944. [DOI] [PubMed] [Google Scholar]
- Kessel D., Hall T. C., Rosenthal D. Uptake and phosphorylation of cytosine arabinoside by normal and leukemic human blood cells in vitro. Cancer Res. 1969 Feb;29(2):459–463. [PubMed] [Google Scholar]
- MAPLESON W. W. An electric analogue for uptake and exchange of inert gases and other agents. J Appl Physiol. 1963 Jan;18:197–204. doi: 10.1152/jappl.1963.18.1.197. [DOI] [PubMed] [Google Scholar]
- PETRAKIS N. L., MASOUREDIS S. P., MILLER P. The local blood flow in human bone marrow in leukemia and neoplastic diseases as determined by the clearance rate of radioiodide (I131). J Clin Invest. 1953 Oct;32(10):952–963. doi: 10.1172/JCI102821. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Swartz R. D., Sidell F. R., Cucinell S. A. Effects of physical stress on the disposition of drugs eliminated by the liver in man. J Pharmacol Exp Ther. 1974 Jan;188(1):1–7. [PubMed] [Google Scholar]
- Wan S. H., Huffman D. H., Azarnoff D. L., Hoogstraten B., Larsen W. E. Pharmacokinetics of 1-beta-D-arabinofuranosylcytosine in humans. Cancer Res. 1974 Feb;34(2):392–397. [PubMed] [Google Scholar]
- Wilkinson G. R., Shand D. G. Commentary: a physiological approach to hepatic drug clearance. Clin Pharmacol Ther. 1975 Oct;18(4):377–390. doi: 10.1002/cpt1975184377. [DOI] [PubMed] [Google Scholar]
- van Prooijen R., van der Kleijn E., Haanen C. Pharmacokinetics of cytosine arabinoside in acute myeloid leukemia. Clin Pharmacol Ther. 1977 Jun;21(6):744–750. doi: 10.1002/cpt1977216744. [DOI] [PubMed] [Google Scholar]
