Article: article d'un périodique ou d'un magazine.
Activation of CD4+ and CD8+ lymphocyte subsets by streptozotocin in murine popliteal lymph node (PLN) test.
Journal of Autoimmunity
Date de publication
Publication types: Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't Publication Status: ppublish
Time-related and dose-related popliteal lymph node (PLN) enlargement and lymphocyte subset alterations owing to subcutaneous (s.c.) injection of streptozotocin (STZ) into the foot pad were determined in (C57BL/6 x DBA/2)F1 [B6D2F1] mice. Early cell activation and time-related changes in T and B lymphocyte subsets were monitored during the onset of STZ-induced lymphoproliferative reaction by flow cytometry and immunophenotyping of lymphocyte subsets stained with a panel of monoclonal antibodies. Examination of cell size and chromatin decondensing for T and B cell subsets revealed differences in their activation profiles during the early phase of STZ-induced lymph node enlargement. The kinetics of the reaction showed initial activation and proliferation of CD4+ cells associated with accumulation of CD8+ and B cells. Subsequently CD8+ cells were activated and proliferated, but there was no evidence of early or late B cell activation as shown by the lack of increase in cell size or nuclear decondensation and the low and transient synthesis of immunoglobulins. The activation characteristics for CD4+ and CD8+ cell subsets in STZ-induced node enlargement were found to be analogous with T cell activation in acute allogeneic graft-versus-host (GVH) reaction in which the F1 recipient differed from the parent at both class I and II MHC loci. Our data support a central role for T cell activation in the induction of STZ-related PLN enlargement and suggest that recirculatory host B cells can play a major role in early node enlargement.
Animals, Antibody Formation/drug effects, Antigens, Surface/analysis, Autoimmune Diseases/chemically induced, Autoimmune Diseases/immunology, CD4-Positive T-Lymphocytes/drug effects, CD4-Positive T-Lymphocytes/immunology, Female, Lymph Nodes/drug effects, Lymph Nodes/immunology, Lymphadenitis/chemically induced, Lymphadenitis/immunology, Lymphocyte Activation/drug effects, Mice, Mice, Inbred C57BL/immunology, Mice, Inbred DBA/immunology, Streptozocin/pharmacology, Streptozocin/toxicity, T-Lymphocytes, Regulatory/drug effects, T-Lymphocytes, Regulatory/immunology
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