title: Transforming growth factor-beta 1 enhances the generation of allospecific cytotoxic T lymphocytes.
abstract: We investigated the effects of transforming growth factor-beta 1 (TGF-beta 1) on the proliferation and generation of murine T lymphocytes in vitro. TGF-beta 1 suppressed T- and B-lymphocyte proliferation, mixed lymphocyte reaction (MLR), and the generation of natural killer (NK) cells and lymphokine-activated killer (LAK) cells. On the other hand, TGF-beta 1 significantly enhanced the generation of allospecific cytotoxic T lymphocytes (CTL) at low concentrations (0.01-1 ng/ml) in a dose-dependent manner and restored it to the control level at higher concentrations (10-40 ng/ml). Allospecific CTL generation by TGF-beta 1 was maximally enhanced when added at the beginning of culture. Less enhancement occurred when the addition was delayed. Anti-TGF-beta 1 antibody completely abolished the enhancing effects of TGF-beta 1. Furthermore, platelet-derived TGF-beta (pTGF-beta) as well as recombinant TGF-beta 1 similarly enhanced the generation of allospecific CTL. These data demonstrate that TGF-beta has not only immunosuppressive effects but also immuno-enhancing effects in vitro.
authors.affiliation: Laboratory of Orthopaedic Surgery, Nagoya University School of Medicine, Aichi, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Kondo
authors.forename: K
authors.initials: K
authors.lastname: Isobe
authors.forename: N
authors.initials: N
authors.lastname: Ishiguro
authors.forename: I
authors.initials: I
authors.lastname: Nakashima
authors.forename: T
authors.initials: T
authors.lastname: Miura
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D002455:Cell Division / Q000276:immunology; D002478:Cells, Cultured; D005260:Female; D007108:Immune Tolerance / Q000276:immunology; D015979:Killer Cells, Lymphokine-Activated / Q000276:immunology; D007694:Killer Cells, Natural / Q000276:immunology; D007959:Lymphocyte Culture Test, Mixed; D051379:Mice; D008815:Mice, Inbred Strains; D011994:Recombinant Proteins / Q000276:immunology; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D016212:Transforming Growth Factor beta / Q000276:immunology*
chemical_list: D011994:Recombinant Proteins; D016212:Transforming Growth Factor beta