Biomaterial Database

Anti-retrovirus activity of 3'-fluoro- and 3'-azido-substituted pyrimidine 2',3'-dideoxynucleoside analogues. 1988

J Balzarini, and M Baba, and R Pauwels, and P Herdewijn, and E De Clerq

Rega Institute for Medical Research, Katholieke Universiteit Leuven, Belgium.

The 3'-fluoro-and 3'-azido-substituted derivatives of 2',3'-dideoxythymidine (ddThd), 2',3'-dideoxyuridine (ddUrd), 2',3'-dideoxy-5-ethyluridine (ddEtUrd) and 2',3'-dideoxycytidine (ddCyd) have been synthesized and evaluated for their anti-retrovirus activity [against human immunodeficiency virus (HIV) and murine Moloney sarcoma virus (MSV)]. Based on their 50% effective doses the most potent inhibitors of HIV replication in human MT4 lymphocytes were: FddThd (0.001 microM), AzddThd (0.004 microM), FddUrd (0.04 microM) and AzddUrd (0.36 microM). Their selectivity indexes were 197, 5000, 500 and 677, respectively. In contrast, none of the 3'-substituted ddEtUrd derivatives had a marked antiviral effect. The 2',3'-dideoxynucleoside analogues showed poor, if any, substrate affinity for (bacterial) dThd phosphorylase. AzddThd and FddThd inhibited human dThd kinase to a much greater extent (Ki/Km: 0.66 and 3.4, respectively) than did AzddUrd or FddUrd (Ki/Km: 71 and 171, respectively). The Ki/Km values of FddCyd and AzddCyd for human dCyd kinase were about 60. Although phosphorylation is a prerequisite for the anti-retrovirus activity of the 2',3'-dideoxynucleoside derivatives, there is no close correlation between the anti-retrovirus potency of the 3'-fluoro- and 3'-azido-substituted ddUrd, ddThd, ddEtUrd and ddCyd derivatives and their affinity for dThd kinase or dCyd kinase.

UI	MeSH Term	Description	Entries
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D010766	Phosphorylation	The introduction of a phosphoryl group into a compound through the formation of an ester bond between the compound and a phosphorus moiety.	Phosphorylations
D011741	Pyrimidine Nucleosides	Pyrimidines with a RIBOSE attached that can be phosphorylated to PYRIMIDINE NUCLEOTIDES.	Nucleosides, Pyrimidine
D002455	Cell Division	The fission of a CELL. It includes CYTOKINESIS, when the CYTOPLASM of a cell is divided, and CELL NUCLEUS DIVISION.	M Phase,Cell Division Phase,Cell Divisions,Division Phase, Cell,Division, Cell,Divisions, Cell,M Phases,Phase, Cell Division,Phase, M,Phases, M
D003841	Deoxycytidine	A nucleoside component of DNA composed of CYTOSINE and DEOXYRIBOSE.	Cytosine Deoxyribonucleoside,Cytosine Deoxyriboside,Deoxyribonucleoside, Cytosine,Deoxyriboside, Cytosine
D003842	Deoxycytidine Kinase	An enzyme that catalyzes reversibly the phosphorylation of deoxycytidine with the formation of a nucleoside diphosphate and deoxycytidine monophosphate. Cytosine arabinoside can also act as an acceptor. All natural nucleoside triphosphates, except deoxycytidine triphosphate, can act as donors. The enzyme is induced by some viruses, particularly the herpes simplex virus (HERPESVIRUS HOMINIS). EC 2.7.1.74.	Kinase, Deoxycytidine
D004247	DNA	A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).	DNA, Double-Stranded,Deoxyribonucleic Acid,ds-DNA,DNA, Double Stranded,Double-Stranded DNA,ds DNA
D006678	HIV	Human immunodeficiency virus. A non-taxonomic and historical term referring to any of two species, specifically HIV-1 and/or HIV-2. Prior to 1986, this was called human T-lymphotropic virus type III/lymphadenopathy-associated virus (HTLV-III/LAV). From 1986-1990, it was an official species called HIV. Since 1991, HIV was no longer considered an official species name; the two species were designated HIV-1 and HIV-2.	AIDS Virus,HTLV-III,Human Immunodeficiency Viruses,Human T-Cell Lymphotropic Virus Type III,Human T-Lymphotropic Virus Type III,LAV-HTLV-III,Lymphadenopathy-Associated Virus,Acquired Immune Deficiency Syndrome Virus,Acquired Immunodeficiency Syndrome Virus,Human Immunodeficiency Virus,Human T Cell Lymphotropic Virus Type III,Human T Lymphotropic Virus Type III,Human T-Cell Leukemia Virus Type III,Immunodeficiency Virus, Human,Immunodeficiency Viruses, Human,Virus, Human Immunodeficiency,Viruses, Human Immunodeficiency,AIDS Viruses,Human T Cell Leukemia Virus Type III,Lymphadenopathy Associated Virus,Lymphadenopathy-Associated Viruses,Virus, AIDS,Virus, Lymphadenopathy-Associated,Viruses, AIDS,Viruses, Lymphadenopathy-Associated
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
D000963	Antimetabolites	Drugs that are chemically similar to naturally occurring metabolites, but differ enough to interfere with normal metabolic pathways. (From AMA Drug Evaluations Annual, 1994, p2033)	Antimetabolite