title: Monoclonal antibodies reactive with normal and neoplastic T cells in paraffin sections.
abstract: Without fresh or frozen tissue, it previously has been impossible to confirm the T-cell nature of reactive or neoplastic lymphoid cells. The availability of antibodies reactive with T cells in paraffin sections now allows retrospective analysis of a large number of cases. Two commercially available monoclonal antibodies, MT1 and MT2, were tested for their reactivities with T cells in a wide range of formalin-fixed, paraffin-embedded tissues, including 130 cases of immunologically characterized lymphoma. In reactive lymph nodes, MT1 stained the T-cell areas, whereas MT2 stained both the T-cell areas and mantle-zone B lymphocytes. MT1 stained 38 of 55 T-cell lymphomas (69.1%; 94.7% of cases from one hospital that used a shorter fixation time, and 55.6% of cases from another hospital that used a longer fixation time). MT2 stained only 6 (10.9%) of the T-cell lymphomas. Among the 74 cases of B-cell lymphoma, 3 (4.0%) were stained by MT1 and 30 (40.5%) by MT2.MT1 was also reactive with 3 of 4 cases of granulocytic sarcoma, as expected from its reactivity with normal granulocytes. Neither MT1 nor MT2 stained Reed-Sternberg cells or their variants in HodgKin's disease. We conclude that MT1 is a valuable marker for T cells, particularly when used with a panel of antibodies reactive with B cells in paraffin sections. MT2 is of limited value because of its cross-reactivity with many B-cell lymphomas.
authors.affiliation: Department of Morbid Anatomy, Prince of Wales Hospital.
authors.forename: C S
authors.initials: CS
authors.lastname: Ng
authors.forename: J K
authors.initials: JK
authors.lastname: Chan
authors.forename: P K
authors.initials: PK
authors.lastname: Hui
authors.forename: S T
authors.initials: ST
authors.lastname: Lo
mesh_terms: D000911:Antibodies, Monoclonal; D006689:Hodgkin Disease / Q000473:pathology; D006801:Humans; D007124:Immunoenzyme Techniques; D007951:Leukemia, Myeloid / Q000473:pathology; D008223:Lymphoma / Q000473:pathology*; D008228:Lymphoma, Non-Hodgkin / Q000473:pathology; D013601:T-Lymphocytes / Q000473:pathology*
chemical_list: D000911:Antibodies, Monoclonal