Patterns of lymphokine secretion amongst mouse gamma delta T cell clones.
Although the patterns of lymphokine (LK) secretion by CD4 and CD8 alpha beta T cells have been extensively studied, the question of whether gamma delta T cells display patterns of restricted LK production and whether these patterns are the same as seen in conventional alpha beta T cells has not been previously addressed. In this study we generated panels of gamma delta T cell clones from normal C57BL/6 and BALB/c mice using a lectin-driven system and compared their patterns of secretion of nine LK with those of CD4 and CD8 alpha beta T cell clones generated in the same system. The results showed that gamma delta T cell clones displayed nonrandom patterns of highly restricted LK production with a strong bias towards the production of type 1 LK. The dominant pattern was one of high level secretion of interferon-gamma and tumor necrosis factor (TNF), with variable production of interleukin (IL)-2, and little or none of the type 2 LK IL-4, IL-5, IL-6, and IL-10. This pattern differed significantly from that of CD4 Th1 clones in that gamma delta clones showed a striking deficiency in the production of IL-3 and granulocyte/macrophage colony-stimulating factor. A small subset of gamma delta clones displayed a novel pattern, in which the only LK produced in substantial quantity were TNF and variable amounts of IL-2. The bias of gamma delta T cells towards type 1 LK production was not an artefact associated with cloning because bulk populations of splenic gamma delta T cells behaved in the same way, even when activated in the presence of high concentrations of IL-4.
Duhindan
N
N
Department of Immunology, Medical School, University of Newcastle, Newcastle upon Tyne, GB.
Farley
A J
AJ
Humphreys
S
S
Parker
C
C
Rossiter
B
B
Brooks
C G
CG
D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000378:metabolism; D018414:CD8-Positive T-Lymphocytes / Q000378:metabolism; D002999:Clone Cells; D007371:Interferon-gamma / Q000096:biosynthesis; D015847:Interleukin-4 / Q000096:biosynthesis; D018655:Lymphocyte Count; D008222:Lymphokines / Q000096:biosynthesis / Q000378:metabolism*; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000502:physiology*; D013154:Spleen / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D016176:T-Lymphocyte Subsets / Q000378:metabolism*
D008222:Lymphokines; D016692:Receptors, Antigen, T-Cell, gamma-delta; D015847:Interleukin-4; D007371:Interferon-gamma