title: [Anti-CD28 antibody costimulation enhances anti-CD3 antibody activating T cells and lowering TGF-beta expression in vitro].
abstract: In order to study how to activate T cells and their immunological characteristics, the anti-CD3 and anti-CD28 McAbs were used to stimulate PBMNC, then their related immunological changes, such as lymphocyte transformation function, the percentage of CD8(+)CD25(+) cells and TGF-beta expression were deleted by lymphocyte transformation assay, flow cytometry and RT-PCR respectively. The results showed that in costimulation with anti-CD28 antibody stimulation, the activity of anti-CD3 antibody was significantly enhanced, the ratio of CD8(+)CD25(+) cells of T cells was obviously increased, while TGF-beta expression was down-regulated. It was concluded that the anti-CD28 antibody costimulation could provide stimulatory signal II, which make T cells more active, while the expression of TGF-beta significantly down-regulated.
authors.affiliation: Department of Blood Transfusion, The General Hospital of PLA, Beijing 100853, China. luoqun@public.bta.net.cn
authors.forename: Qun
authors.initials: Q
authors.lastname: Lou
authors.forename: Ming
authors.initials: M
authors.lastname: Lü
authors.forename: Ming
authors.initials: M
authors.lastname: Yu
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
mesh_terms: D000911:Antibodies, Monoclonal / Q000494:pharmacology*; D018106:CD28 Antigens / Q000276:immunology*; D017252:CD3 Complex / Q000276:immunology*; D015536:Down-Regulation; D006801:Humans; D007963:Leukocytes, Mononuclear / Q000276:immunology / Q000378:metabolism; D008213:Lymphocyte Activation / Q000187:drug effects*; D013601:T-Lymphocytes / Q000276:immunology; D016212:Transforming Growth Factor beta / Q000096:biosynthesis*
chemical_list: D000911:Antibodies, Monoclonal; D018106:CD28 Antigens; D017252:CD3 Complex; D016212:Transforming Growth Factor beta