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Nucleoside conjugates. 6. Synthesis and comparison of antitumor activity of 1-beta-D-arabinofuranosylcytosine conjugates of corticosteroids and selected lipophilic alcohols. 1985

C I Hong, and A J Kirisits, and A Nechaev, and D J Buchheit, and C R West

Five new P1-(steroid-21-yl)-P2-(1-beta-D-arabinofuranosylcytosin-5'-yl)pyro phosphates (ara-CDP-steroids), five 1-beta-D-arabinofuranosylcytosine 5'-O-(alkyl)phosphates (ara-CMP-alkyl esters), and two P1-(alkyl)-P2-(1-beta-D-arabinofuranosylcytosin-5'-yl)pyrophosphat e (ara-CDP-alkyl esters) have been prepared and evaluated against L1210 lymphoid leukemia in culture and in mice (C3D2F1/J). These include ara-CDP-11-deoxycorticosterone (6a), ara-CDP-cortisone (6c), ara-CDP-corticosterone (6d), ara-CDP-cortexolone (6e), and ara-CDP-prednisone (6g), ara-CMP hexadecyl ester (7a), ara-CMP 1-cyclohexylmethyl ester (7b), ara-CMP 1-adamantylmethyl ester (7c), ara-CMP 2-(1-adamanthyl)ethyl ester (7d), ara-CMP 2-chloroethyl ester (7e), ara-CDP hexadecyl ester (9a), and ara-CDP 1-cyclohexylmethyl ester (9b). The in vitro antitumor results indicated that ara-CDP-steroids were as active as the previously reported ara-CMP-steroids and that ara-CMP and ara-CDP-alkyl esters were less growth inhibiting than ara-CDP-steroids and ara-C. However, the in vivo antitumor results indicated that ara-CDP-steroids were generally less effective than the previous monophosphate derivatives. Among them ara-CDP-corticosterone (6d) and the known ara-CDP-cortisol (6b) showed greater efficacy than ara-C with ILS value of 152% and 209%, respectively, at the optimal dose of 40 and 80 (mg/kg)/day for 9 days, while that of ara-C was 138% at the optimum dose of 9.2 (mg/kg)/day. Generally, ara-CMP alkyl esters (7a-e), given ip to the L1210 leukemic mice, were found to be toxic and ineffective. However, ara-CDP hexadecyl ester (9a) showed marginal activity (ILS, 38%). These preliminary results support the thesis that the ara-C conjugates of this type may require a lipophilic and naturally occurring moiety for improved efficacy.

UI MeSH Term Description Entries
D007939 Leukemia L1210 An experimental LYMPHOCYTIC LEUKEMIA of mice. Leukemia L 1210,L 1210, Leukemia,L1210, Leukemia
D008297 Male Males
D003564 Cytidine Deaminase An enzyme that catalyzes the deamination of cytidine, forming uridine. EC 3.5.4.5. Cytidine Aminohydrolase,Aminohydrolase, Cytidine,Deaminase, Cytidine
D004952 Esters Compounds derived from organic or inorganic acids in which at least one hydroxyl group is replaced by an –O-alkyl or another organic group. They can be represented by the structure formula RCOOR’ and are usually formed by the reaction between an acid and an alcohol with elimination of water. Ester
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000305 Adrenal Cortex Hormones HORMONES produced by the ADRENAL CORTEX, including both steroid and peptide hormones. The major hormones produced are HYDROCORTISONE and ALDOSTERONE. Adrenal Cortex Hormone,Corticoid,Corticoids,Corticosteroid,Corticosteroids,Cortex Hormone, Adrenal,Hormone, Adrenal Cortex,Hormones, Adrenal Cortex
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000970 Antineoplastic Agents Substances that inhibit or prevent the proliferation of NEOPLASMS. Anticancer Agent,Antineoplastic,Antineoplastic Agent,Antineoplastic Drug,Antitumor Agent,Antitumor Drug,Cancer Chemotherapy Agent,Cancer Chemotherapy Drug,Anticancer Agents,Antineoplastic Drugs,Antineoplastics,Antitumor Agents,Antitumor Drugs,Cancer Chemotherapy Agents,Cancer Chemotherapy Drugs,Chemotherapeutic Anticancer Agents,Chemotherapeutic Anticancer Drug,Agent, Anticancer,Agent, Antineoplastic,Agent, Antitumor,Agent, Cancer Chemotherapy,Agents, Anticancer,Agents, Antineoplastic,Agents, Antitumor,Agents, Cancer Chemotherapy,Agents, Chemotherapeutic Anticancer,Chemotherapy Agent, Cancer,Chemotherapy Agents, Cancer,Chemotherapy Drug, Cancer,Chemotherapy Drugs, Cancer,Drug, Antineoplastic,Drug, Antitumor,Drug, Cancer Chemotherapy,Drug, Chemotherapeutic Anticancer,Drugs, Antineoplastic,Drugs, Antitumor,Drugs, Cancer Chemotherapy
D001088 Arabinonucleotides Nucleotides containing arabinose as their sugar moiety. Arabinofuranosylnucleotides

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