title: Expression of enolases in T cell tumors and Hodgkin's disease.
abstract: Frozen biopsy specimens taken from 30 cases with T cell tumors (8 with T cell acute lymphoblastic leukemia, 8 with T cell lymphoblastic lymphoma, and 14 with peripheral T cell lymphomas), and from 12 with Hodgkin's disease, were investigated using a direct immunohistochemical method to detect alpha-, beta- and gamma-enolases. Normal thymus and lymph node specimens with reactive lymphadenitis were also investigated. Subcortical thymocytes and the majority of deep cortical thymocytes showed reactivity of alpha-/beta-/gamma- approximately +/- -enolases, and medullary thymocytes and small lymphocytes in T zone areas of lymph node showed reactivity of alpha-/beta+/gamma- approximately +/- -enolases. Seven of the 8 cases with T cell acute lymphoblastic leukemia showed reactivity of alpha-/beta-/gamma(-)-enolases or alpha+/beta-/gamma(-)-enolases in leukemic lymphocytes, 7 of the 8 cases with T cell lymphoblastic lymphoma showed reactivity of beta(+)-enolase, and all 14 cases with peripheral T-cell lymphomas showed reactivity of alpha-/beta- approximately +/gamma(+)-enolases in lymphoma cells. All the 12 cases with Hodgkin's disease showed reactivity of alpha-/beta+/gamma(+)-enolases in Reed-Sternberg and Hodgkin's cells. These results indicate the following: (a) The neoplastic cells of T cell acute lymphoblastic leukemia, T cell lymphoblastic lymphoma and peripheral T cell lymphomas present different expressions in each of these three categories. This may imply a difference of maturation and differentiation or activation among neoplastic T lymphocytes. (b) T lymphocytes may switch from alpha- to beta-enolase and from alpha- to gamma-enolase in the course of differentiation and activation. (c) It is worth noting that the Reed-Sternberg and Hodgkin's cells of Hodgkin's disease present an identical expression of enolases.
authors: Section of Clinical Laboratory, Hospital, National Institute of Radiological Sciences, Chiba, Japan.
authors: K
authors: K
authors: Oka
authors: N
authors: N
authors: Mori
authors: H
authors: H
authors: Haimoto
authors: K
authors: K
authors: Kato
mesh_terms: D000911:Antibodies, Monoclonal; D001853:Bone Marrow / Q000201:enzymology / Q000473:pathology; D006689:Hodgkin Disease / Q000201:enzymology* / Q000473:pathology; D006801:Humans; D015459:Leukemia-Lymphoma, Adult T-Cell / Q000201:enzymology* / Q000473:pathology; D016399:Lymphoma, T-Cell / Q000201:enzymology* / Q000473:pathology; D046911:Macromolecular Substances; D010641:Phenotype; D010751:Phosphopyruvate Hydratase / Q000032:analysis*; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000201:enzymology* / Q000473:pathology
chemical_list: D000911:Antibodies, Monoclonal; D046911:Macromolecular Substances; D010751:Phosphopyruvate Hydratase