Document 0579 DOCN M9650579 TI Immunohistologic studies on subpopulations of lymphocytes in cattle with enzootic bovine leukosis. DT 9605 AU Chiba T; Hiraga M; Aida Y; Ajito T; Asahina M; Wu D; Ohshima K; Davis WC; Okada K; Department of Veterinary Pathology, Faculty of Agriculture, Iwate; University, Morioka, Japan. SO Vet Pathol. 1995 Sep;32(5):513-20. Unique Identifier : AIDSLINE MED/96090824 AB The distribution of subpopulations of lymphocytes in lymph nodes and tumors from cattle with enzootic bovine leukosis (EBL) was examined by immunohistochemistry using a panel of monclonal antibodies against leukocyte differentiation molecules of EBL. The lesions in lymph nodes could be divided into three types based on the extent of infiltration and proliferation of neoplastic cells with provirus and differential expression of leukocyte differentiation molecules. The number of B-B2+, sIgM+ cells was reduced in frequency in follicles during the neoplastic cell proliferation. CD4- and CD8-positive alpha/beta T cells and gamma/delta T cells positive for WC1 (workshop cluster designation) were also reduced in frequency in areas infiltrated with neoplastic cells. Almost all neoplastic cells were B-B2- and IgM-positive. However, there were a few B-B2- and/or IgM-negative cells or cells stained faintly in all cases. WC1+ cells were not observed in tumor tissues. However, CD4+ and CD8+ cells were observed throughout tumor tissues, suggesting a role for these cells in tumor immunity. DE Animal Antibodies, Monoclonal Blotting, Southern/VETERINARY Cattle Cell Differentiation/IMMUNOLOGY Cervix Uteri/PATHOLOGY CD4-CD8 Ratio/VETERINARY Electrophoresis, Polyacrylamide Gel/VETERINARY Enzootic Bovine Leukosis/IMMUNOLOGY/*PATHOLOGY Female Immunohistochemistry Leukemia Virus, Bovine/IMMUNOLOGY Lymph Nodes/IMMUNOLOGY/PATHOLOGY Lymphoma, Diffuse/IMMUNOLOGY/PATHOLOGY/VETERINARY Support, Non-U.S. Gov't T-Lymphocyte Subsets/*PATHOLOGY JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).