title: Antiviral effects of 6-chloro-2',3'-dideoxyguanosine in rhesus monkeys acutely infected with simian immunodeficiency virus.
abstract: A lipophilic dideoxynucleoside analogue, 6-chloro-2',3'-dideoxyguanosine (6-Cl-ddG), was expected to be effective against AIDS-related dementia. In this study, we tested the effect of 6-Cl-ddG on simian immunodeficiency virus (SIVmac239) replication in vitro and on acute infection of six rhesus monkeys (Macaca mulatta) with SIVmac239. This compound inhibited SIV-induced cytopathic effect in CEM x 174 cells and SIV replication in vitro with an ED50 value of 2.5 microM. A dose of 25 mg/kg 6-Cl-ddG was administered to three monkeys every 8 h for 10 days and an untreated group of three monkeys was injected with the solvent without drug. Although 6-Cl-ddG was not detected in the plasma, the metabolite ddG was maintained at a concentration of more than 3 microM for 8 h after administration. In the cerebrospinal fluid, the ddG concentration was 2 microM at 2 h after administration. SIV antigen (p27) and antibody appearance in the plasma were delayed for 5-8 days compared with the mock-treated group. The occurrence of lymphadenopathy in treated monkeys was delayed for 6 days compared with the mock-treated group. Signs of 6-Cl-ddG toxicity were minimal after the treatment. The results of this study provide further evidence that 6-Cl-ddG may act as a potent anti-human immunodeficiency virus agent in vivo.
authors.affiliation: Iwakuni Research Laboratory of Technology, Nippon Paper Industries, Yamaguchi, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Fujii
authors.forename: R
authors.initials: R
authors.lastname: Mukai
authors.forename: H
authors.initials: H
authors.lastname: Akari
authors.forename: M
authors.initials: M
authors.lastname: Machida
authors.forename: K
authors.initials: K
authors.lastname: Mori
authors.forename: M
authors.initials: M
authors.lastname: Takasaka
authors.forename: E
authors.initials: E
authors.lastname: Kojima
authors.forename: K
authors.initials: K
authors.lastname: Murakami
authors.forename: Y
authors.initials: Y
authors.lastname: Yoshikawa
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D000956:Antigens, Viral / Q000097:blood; D000998:Antiviral Agents / Q000493:pharmacokinetics / Q000494:pharmacology* / Q000627:therapeutic use; D002460:Cell Line; D018920:Coculture Techniques; D003588:Cytopathogenic Effect, Viral / Q000187:drug effects; D015224:Dideoxynucleosides / Q000493:pharmacokinetics / Q000494:pharmacology* / Q000627:therapeutic use; D005260:Female; D008253:Macaca mulatta; D008297:Male; D016097:Simian Acquired Immunodeficiency Syndrome / Q000188:drug therapy* / Q000276:immunology; D015302:Simian Immunodeficiency Virus / Q000187:drug effects / Q000472:pathogenicity / Q000502:physiology; D016176:T-Lymphocyte Subsets; D014779:Virus Replication / Q000187:drug effects
chemical_list: C095793:6-chloro-2',3'-dideoxyguanosine; D000914:Antibodies, Viral; D000956:Antigens, Viral; D000998:Antiviral Agents; D015224:Dideoxynucleosides