title: Sodium benzylideneascorbate induces apoptosis in HIV-replicating U1 cells.
abstract: U1 cells, a subclone of U937 cells chronically infected with human immunodeficiency virus type 1 (HIV-1), produced HIV-1 only in the presence of inducers such as 12-O-tetradecanoxylphorbol 13-acetate (TPA) or tumor necrosis factor (TNF)-alpha. The expression of HIV-antigen on U1 cells induced by TPA or TNF-alpha was found to be prevented by sodium 5,6-benzylidene-L-ascorbate (SBA) in a concentration-dependent manner. Treatment of U1 cells with SBA in the presence of inducers resulted in cell death with cell shrinkage, chromatin condensation and DNA fragmentation into nucleosomal oligomers, characteristics of apoptosis. In contrast, SBA had scarcely any apoptotic effect on U1 cells in the absence of inducers. SBA did not also induce apoptosis in parental U937 cells in the presence or absence of inducers. These results suggest that HIV-replicating U1 cells selectively undergo apoptosis on treatment with SBA.
authors.affiliation: Department of Biochemistry, Faculty of Pharmaceutical Sciences, Science University of Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Aoki
authors.forename: H
authors.initials: H
authors.lastname: Nakashima
authors.forename: T
authors.initials: T
authors.lastname: Hattori
authors.forename: D
authors.initials: D
authors.lastname: Shiokawa
authors.forename: E
authors.initials: E
authors.lastname: Ni-imi
authors.forename: Y
authors.initials: Y
authors.lastname: Tanimoto
authors.forename: H
authors.initials: H
authors.lastname: Maruta
authors.forename: F
authors.initials: F
authors.lastname: Uchiumi
authors.forename: M
authors.initials: M
authors.lastname: Kochi
authors.forename: N
authors.initials: N
authors.lastname: Yamamoto
mesh_terms: D000998:Antiviral Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D001205:Ascorbic Acid / Q000031:analogs & derivatives* / Q000494:pharmacology; D001597:Benzylidene Compounds / Q000494:pharmacology*; D015488:HIV Antigens / Q000032:analysis; D015497:HIV-1 / Q000187:drug effects*; D006801:Humans; D015394:Molecular Structure; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D014407:Tumor Cells, Cultured; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D014779:Virus Replication / Q000187:drug effects
chemical_list: D000998:Antiviral Agents; D001597:Benzylidene Compounds; D015488:HIV Antigens; D014409:Tumor Necrosis Factor-alpha; D013755:Tetradecanoylphorbol Acetate; D001205:Ascorbic Acid; C070680:zilascorb