title: A novel monoclonal antibody (OPD4) recognizing a helper/inducer T cell subset. Its application to paraffin-embedded tissues.
abstract: A novel monoclonal antibody (MAb), OPD4, reactive with a helper/inducer (H/I) subset of T cells in formalin-fixed, paraffin-embedded tissue sections, has been identified through immunization with an activated H/I T cell line, namely DL40. The antibody is an IgG1 antibody and it recognizes an antigen with a molecular weight of 200 kd, corresponding to that of leukocyte common antigen. OPD4+/CD4+ T cells provided better help for pokeweed mitogen-stimulated polyclonal IgG production than OPD4-/CD4+ T cells. OPD4 recognized the H/I T cell subset even in paraffin-embedded tissue sections, but did not recognize nonhematopoietic cells, suppressor/cytotoxic T cells, B cells, monocytes in the peripheral blood, or other normal hematopoietic cells as examined by the flow cytometric and immunoperoxidase methods. Besides the lymphoid cells, OPD4 reacted with a number of histiocytes (epithelioid cells) in tissues from sarcoidosis and tuberculosis. For the neoplastic lesions, OPD4 reacted with approximately half of the cases of T cell lymphomas. Consequently, OPD4 may be useful for the diagnosis and study of malignant lymphomas and other related lesions.
authors.affiliation: Department of Pathology, Okayama University Medical School, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Yoshino
authors.forename: H
authors.initials: H
authors.lastname: Mukuzono
authors.forename: H
authors.initials: H
authors.lastname: Aoki
authors.forename: K
authors.initials: K
authors.lastname: Takahashi
authors.forename: T
authors.initials: T
authors.lastname: Takeuchi
authors.forename: I
authors.initials: I
authors.lastname: Kubonishi
authors.forename: Y
authors.initials: Y
authors.lastname: Ohtsuki
authors.forename: M
authors.initials: M
authors.lastname: Motoi
authors.forename: T
authors.initials: T
authors.lastname: Akagi
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology*; D001853:Bone Marrow / Q000276:immunology; D001854:Bone Marrow Cells; D002460:Cell Line; D005434:Flow Cytometry; D006801:Humans; D007938:Leukemia / Q000276:immunology / Q000473:pathology; D008198:Lymph Nodes / Q000166:cytology / Q000276:immunology; D008223:Lymphoma / Q000276:immunology / Q000473:pathology; D014066:Palatine Tonsil / Q000166:cytology / Q000276:immunology; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology* / Q000502:physiology; D013950:Thymus Gland / Q000166:cytology / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal