title: Oligo-2',5'-adenylate synthetase activity in cells persistently infected with human T-lymphotropic virus type I (HTLV-I).
abstract: Spontaneous production of interferon-gamma (IFN-gamma) was shown in several T-lymphoblastoid cell lines persistently infected with human T-lymphotropic virus (HTLV-1). However, the produced IFN-gamma was not always associated with the induction of the antivirus state. The induction of oligo-2',5'-adenylate synthetase (2-5AS) by IFN was studied in five human T-cell lines persistently infected with HTLV-I (MT-1, MT-2, SMT-1, HUT 102 and OKM-2). Four cell lines are able to produce IFN-gamma spontaneously, while the OKM-2 cell line is not. Poor induction of 2-5AS was recognized in three (MT-1, MT-2 and SMT-1) of the four cell lines producing IFN-gamma, though the poor induction was improved after long-term cultivation of cells with IFN-alpha. On the contrary, in the OKM-2 cell line, significant activity of the enzyme was induced by IFN-alpha. Induction of 2-5AS was not correlated with cell growth inhibition, but with the antivirus state. Furthermore, an inverse relationship between IFN-gamma production and 2-5AS induction was demonstrated in these cell lines with the exception of HUT 102 cells.
authors.affiliation: Department of Microbiology, Sapporo Medical College, Hokkaido, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Fujii
authors.forename: K W
authors.initials: KW
authors.lastname: Kwon
authors.forename: T
authors.initials: T
authors.lastname: Yashiki
authors.forename: K
authors.initials: K
authors.lastname: Kimura
authors.forename: E
authors.initials: E
authors.lastname: Isogai
authors.forename: H
authors.initials: H
authors.lastname: Isogai
authors.forename: S
authors.initials: S
authors.lastname: Sekiguchi
authors.forename: K
authors.initials: K
authors.lastname: Oguma
mesh_terms: D015088:2',5'-Oligoadenylate Synthetase / Q000378:metabolism*; D002455:Cell Division; D002460:Cell Line; D004790:Enzyme Induction; D015490:HTLV-I Infections / Q000201:enzymology*; D006801:Humans; D016898:Interferon-alpha / Q000494:pharmacology; D007371:Interferon-gamma / Q000096:biosynthesis; D013601:T-Lymphocytes / Q000201:enzymology / Q000382:microbiology*
chemical_list: D016898:Interferon-alpha; D007371:Interferon-gamma; D015088:2',5'-Oligoadenylate Synthetase