خيارات البحث
النتائج 1 - 5 من 5
Immunopathologic study and characterization of the phenotype of transformed cells in sheep with bovine leukemia virus-induced lymphosarcoma.
1994
Murakami K. | Aida Y. | Kageyama R. | Numakunai S. | Ohshima K. | Okada K. | Ikawa Y.
We used monoclonal antibodies and immunohistologic examination of lymph nodes, to elucidate the pathogenesis of lymphosarcoma induced by, infection with bovine leukemia virus (BLV). The superficial cervical lymph nodes from 3 BLV-infected but apparently healthy sheep and 5 sheep with full-blown lymphosarcoma were examined. We also investigated the integration of bovine leukemia provirus by use of Southern blotting. In lymph nodes from sheep lacking clinical signs of infection, in which the provirus had been integrated at multiple sites in the genome, many large hypertrophic follicles were observed in the cortex. These follicles had germinal centers consisting of CD4+T cells and B cells that expressed surface IgM (sIgM) and major histocompatibility complex (MHC) class-II antigens, but not B cell-specific B2 molecule. The percentage of CD4+T cells in the cortex was significantly (P < 0.05) higher than that of the controls and sheep with lymphosarcoma. In all sheep with lymphosarcoma, the lymph nodes were completely destroyed by proliferating neoplastic cells, and in addition, small atrophic follicles, which consisted of normal B-cell marker-positive cells, were seen near the trabecula and the subcapsule. In these instances, neoplastic cells appeared to be a monoclonal population derived from a single CD5- B-cell lineage and to be classified as 2 types, CD5-CD4-CD8-B2+MHC class-II+sIgM+ and CD5-CD4-CD8-B2+MHC class-II+sIgM-. Moreover, CD8+T cells infiltrated diffusely throughout the tumorous lymph nodes apart from the atrophic follicles, and CD4+T cells were observed around atrophic follicles. Both types of T cells were small-size, normal lymphocytes with round and noncleaved nuclei, and were apparently non-neoplastic cells. In fact, after separation by use of a panning method, it seems that, in blood mononuclear cells from BLV-infected sheep without clinical signs of infection, but in lymphosarcomatous stages, the proviral genome was integrated only in B cells.
اظهر المزيد [+] اقل [-]Monoclonal antibodies to bovine viral diarrhea virus: cross-reactivities to field isolates and hog cholera virus strains.
1994
Deregt D. | Bolin S.R. | Heckett R.A. | Loewen K.G.
Detection of antibodies and antigens of Aujeszky's disease virus using dot-immunoassay
1994
Jun, M.H. | Cho, Y.S. | Chang, K.S. (Chungnam National University, Taejon (Korea Republic). College of Veterinary Medicine)
Enhancement of cell-mediated immunity by administration of plasma protein in pigs-(1)-Proportion of leukocyte subpopulations and cells expressing adhesion molecules in peripheral blood
1994
Yang, C.K. (Thaihan Industry Company, Seoul (Korea Republic). Veterinary Diagnostic Laboratory) | Kim, S.J. (Konkuk University, Seoul (Korea Republic). Department of Veterinary Medicine) | Moon, J.S. | Jung, S.C. | Park, Y.H. (Rural Development Administration, Anyang (Korea Republic). Veterinary Research Institute)
Enhancement of cell-mediated immunity by administration of plasma protein in pigs-(2)-Proportion of T lymphocyte subpopulations and cells expressing MHC class 1, 2 molecules in peripheral blood
1994
Yang, C.K. (Thaihan Industry Company, Seoul (Korea Republic). Veterinary Diagnostic Laboratory) | Kim, S.J. (Konkuk University, Seoul (Korea Republic). Department of Veterinary Medicine) | Moon, J.S. | Jung, S.C. | Park, Y.H. (Rural Development Administration, Anyang (Korea Republic). Veterinary Research Institute)
