Differences in the induction of CD8+ T cell responses by subpopulations of dendritic cells from afferent lymph are related to IL-1 alpha secretion.
The major subset of dendritic cells (DC) from bovine afferent lymph expresses the SIRP alpha MyD-1 antigen, but not CD11a or the antigen recognized by mAb CC81, and potently stimulates CD4+ and CD8+ T lymphocyte proliferation. The minor subpopulation, that is CD11a+ CC81+ MyD-1-, effectively stimulates CD4+ but not CD8+ T lymphocyte proliferation. CD11a+ CC81+ MyD-1- DC did not induce anergy or death or secrete an inhibitory factor. However, supernatant from cultures of CD8+ T cells with CD11a- CC81- MyD-1+ DC significantly enhanced proliferation of CD8+ T cells in response to CD11a+ CC81+ MyD-1- DC, an effect that was blocked by interleukin (IL)-1alpha, but not IL-1beta, specific mAb. The proliferation of CD8+ T cells with CD11a+ CC81+ MyD-1- DC was also enhanced by adding IL-1alpha. IL-1beta slightly enhanced proliferation, whereas IL-2, IL-6, IL-12, and IL-15 had no effect. We conclude that the failure to stimulate CD8+ T cell proliferation results from the lack of IL-1alpha synthesis by this population, which may have important consequences in vivo.
Hope
J C
JC
Institute for Animal Health, Newbury, Berkshire, United Kingdom. Jayne.Hope@BBSRC.ac.uk
Sopp
P
P
Collins
R A
RA
Howard
C J
CJ
D000276:Adjuvants, Immunologic / Q000235:genetics / Q000494:pharmacology; D000818:Animals; D000911:Antibodies, Monoclonal / Q000032:analysis; D018845:CD11 Antigens / Q000096:biosynthesis / Q000276:immunology; D018414:CD8-Positive T-Lymphocytes / Q000166:cytology / Q000276:immunology*; D002417:Cattle; D002469:Cell Separation; D002470:Cell Survival / Q000276:immunology; D002474:Cell-Free System / Q000276:immunology; D002478:Cells, Cultured; D017635:Clonal Anergy; D003602:Cytotoxicity, Immunologic; D003713:Dendritic Cells / Q000276:immunology* / Q000378:metabolism; D015536:Down-Regulation / Q000276:immunology; D006801:Humans; D016130:Immunophenotyping; D007375:Interleukin-1 / Q000235:genetics / Q000378:metabolism* / Q000494:pharmacology; D018664:Interleukin-12 / Q000235:genetics / Q000494:pharmacology; D007376:Interleukin-2 / Q000378:metabolism; D015848:Interleukin-5 / Q000378:metabolism; D015850:Interleukin-6 / Q000235:genetics / Q000494:pharmacology; D007519:Isoantigens / Q000276:immunology; D008196:Lymph / Q000166:cytology / Q000276:immunology*; D008213:Lymphocyte Activation; D011994:Recombinant Proteins / Q000276:immunology / Q000494:pharmacology
D000276:Adjuvants, Immunologic; D000911:Antibodies, Monoclonal; D018845:CD11 Antigens; D007375:Interleukin-1; D007376:Interleukin-2; D015848:Interleukin-5; D015850:Interleukin-6; D007519:Isoantigens; D011994:Recombinant Proteins; D018664:Interleukin-12