title: Regulation of in vivo immunological reactions by monoclonal antibody against lymphocyte activation antigen.
abstract: In vivo effects of a monoclonal antibody that recognizes rat lymphocyte activation antigen were studied. Spleen cells obtained from sheep red blood cell (SRBC)-immunized rats developed strong PFC response against SRBC. However, the 5C6-F4 treatment resulted in the inhibition of subsequent development of PFC response. The suppression of PFC response was due to the inhibition of generation of helper T cells, but not due to the preferential induction of suppressor cells. In addition, 5C6-F4 antibody was also found to inhibit the clinical expression of collagen-induced rat arthritis and the synovial inflammation in collagen-induced arthritis rats. Furthermore, the in vivo generation of cytotoxic cells against syngeneic tumor cells was also inhibited by 5C6-F4 antibody. The in vivo administration of 5C6-F4 antibody did not cause any pathological changes in brain, lung, liver, kidney, spleen, thymus, and lymph nodes.
authors.affiliation: Department of Pathology, Sapporo Medical College, Hokkaido.
authors.forename: H
authors.initials: H
authors.lastname: Yuasa
authors.forename: T
authors.initials: T
authors.lastname: Uede
authors.forename: T
authors.initials: T
authors.lastname: Wada
authors.forename: A
authors.initials: A
authors.lastname: Yamaguchi
authors.forename: T
authors.initials: T
authors.lastname: Murakami
authors.forename: H
authors.initials: H
authors.lastname: Osawa
authors.forename: T
authors.initials: T
authors.lastname: Diamantstein
authors.forename: K
authors.initials: K
authors.lastname: Kikuchi
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000008:administration & dosage / Q000276:immunology*; D000954:Antigens, Surface / Q000276:immunology*; D001168:Arthritis / Q000139:chemically induced; D003094:Collagen; D005260:Female; D008213:Lymphocyte Activation; D051381:Rats; D011916:Rats, Inbred F344; D011917:Rats, Inbred Lew; D013154:Spleen / Q000166:cytology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology* / Q000378:metabolism; D050378:T-Lymphocytes, Regulatory / Q000276:immunology / Q000378:metabolism; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7
chemical_list: D000911:Antibodies, Monoclonal; D000954:Antigens, Surface; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7; D003094:Collagen