title: Functional and phenotypic characteristics of effusion-associated lymphoid cells cultured in the presence of either recombinant interleukin 2 or T-cell growth factor from malignant pleural and peritoneal effusions in patients with advanced carcinoma.
abstract: Malignant pleural or peritoneal effusion-associated lymphoid (EAL) cells from 17 patients with advanced carcinoma were cultured with autologous carcinoma cells in the presence of either recombinant interleukin 2 (rIL 2) or T-cell growth factor (TCGF). Considerable cytolytic activity of the cells against allogeneic tumor cells, such as K562 and Daudi cells was induced by the cultivation. TCGF-activated EAL cells acquired higher anti-Daudi tumor cytotoxicity than rIL 2-activated EAL cells. The resultant TCGF-activated EAL cells from cancer patients significantly exceeded lytic activity of TCGF-activated EAL cells from patients with liver cirrhosis for control (p less than 0.01). Four of 6 cases examined also showed cytotoxic activity against autologous tumor. In facts, viable carcinoma cells co-cultured with EAL cells and TCGF mostly disappeared during 14 days. Similar phenomenon was not observed in rIL 2-activated EAL cells. Thus, it was suggested that more additional lymphokine other than IL 2 was necessary to generate cytotoxic activity against autologous tumor cells. The cell populations responsible for cytolytic activity to allogeneic and/or autologous tumor cells were investigated by two-color flow cytometry. The majority of killer-effector cells against allogeneic cells in rIL 2-activated EAL cells from cancer patients showed CD4+Leu8- phenotype at population level. In contrast, it was suggested that cytolytic activity against allogeneic and/or autologous tumor cells in TCGF-activated EAL cells might be mediated by CD8+ CD11- and CD8+ CD28+ effector cells.
authors.affiliation: Department of Internal Medicine, University of Tsukuba.
authors.forename: T
authors.initials: T
authors.lastname: Ebihara
authors.forename: S
authors.initials: S
authors.lastname: Koyama
mesh_terms: D000230:Adenocarcinoma / Q000276:immunology*; D000328:Adult; D000911:Antibodies, Monoclonal; D001202:Ascitic Fluid / Q000276:immunology*; D002460:Cell Line; D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D007376:Interleukin-2 / Q000494:pharmacology*; D007694:Killer Cells, Natural / Q000276:immunology; D008103:Liver Cirrhosis / Q000276:immunology; D008214:Lymphocytes / Q000187:drug effects / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000276:immunology*; D010996:Pleural Effusion / Q000276:immunology*; D011994:Recombinant Proteins / Q000494:pharmacology
chemical_list: D000911:Antibodies, Monoclonal; D007376:Interleukin-2; D011994:Recombinant Proteins