title: Expression and signal transduction of T-cell antigen receptor (TCR)/CD3 complexes on fresh or in vitro expanded T lymphocytes from patients with Hodgkin's and non-Hodgkin's lymphomas.
abstract: T-cell responses against soluble antigens, alloantigens and mitogens are frequently diminished in patients with certain types of cancer. In the present study, the authors investigated possible mechanisms for the partial T-cell immunodeficiency in patients with Hodgkin's or non-Hodgkin's lymphomas. It was found that T-cells from lymphoma patients had significantly reduced proliferative responses to EBV-transformed B-cell lines and to anti-TCR/CD3 MoAb; a 30-50% reduction of cells expressing membrane T-cell receptor (TCR) complexes; and a significantly reduced signal transduction function. Long-term in vitro culture conditions were developed to expand T cells in TCR/CD3-dependent or TCR/CD3-independent manners. With such methods, it was found that the decreased T-cell responses in patients with Hodgkin's and non-Hodgkin's lymphomas appeared to be an intrinsic T-cell defect (not at the antigen presenting cell level), and the T-cell responses could be recovered after only a few days in culture. Thus, it is suggested that the T-cell response-defect in Hodgkin or non-Hodgkin lymphoma patients is a reversible phenomenon, dependent on the patient's tumour-bearing environment.
authors.affiliation: Centre d'Immunopathologie et de Génétique Humaine, CNRS UPR 8291, Toulouse, France.
authors.forename: B
authors.initials: B
authors.lastname: Rubin
authors.forename: E P
authors.initials: EP
authors.lastname: Martin
authors.forename: J
authors.initials: J
authors.lastname: Arnaud
authors.forename: G
authors.initials: G
authors.lastname: Delsol
authors.forename: T
authors.initials: T
authors.lastname: Plesner
authors.forename: A
authors.initials: A
authors.lastname: Ratsimbazafy
authors.forename: R
authors.initials: R
authors.lastname: Llobera
authors.forename: B
authors.initials: B
authors.lastname: Holm
authors.forename: B
authors.initials: B
authors.lastname: Mariame
mesh_terms: D001402:B-Lymphocytes / Q000276:immunology / Q000821:virology; D002461:Cell Line, Transformed; D002472:Cell Transformation, Viral / Q000276:immunology; D004854:Herpesvirus 4, Human; D006689:Hodgkin Disease / Q000276:immunology* / Q000473:pathology; D006801:Humans; D008213:Lymphocyte Activation; D008228:Lymphoma, Non-Hodgkin / Q000276:immunology* / Q000473:pathology; D005810:Multigene Family / Q000276:immunology; D017260:Receptor-CD3 Complex, Antigen, T-Cell / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D015398:Signal Transduction / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology* / Q000378:metabolism* / Q000473:pathology; D014407:Tumor Cells, Cultured
chemical_list: D017260:Receptor-CD3 Complex, Antigen, T-Cell