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Phenotypic and functional analysis of murine CD3+,CD4-,CD8- TCR-gamma delta-expressing peripheral T cells

Phenotypic and functional analysis of murine CD3+,CD4-,CD8- TCR-gamma delta-expressing peripheral T cells

Journal of Immunology 142(11): 3754-3762

Murine CD3+,CD4-,CD8- peripheral T cells, which express various forms of the TCR-gamma delta on their cell surface, have been characterized in terms of their cell-surface phenotype, proliferative and lytic potential, and lymphokine-producing capabilities. Three-color flow cytofluorometric analysis demonstrated that freshly isolated CD3+,CD4-, CD8- TCR-gamma delta lymph node cells were predominantly Thy-1+,CD5dull,IL-2R-,HSA-,B220-, and approximately 70% Ly-6C+ and 70% Pgp-1+. After CD3+,CD4-,CD8-splenocytes were expanded for 7 days in vitro with anti-CD3-epsilon mAb (145-2C11) and IL-2, the majority of the TCR-gamma delta cells expressed B220 and IL-2R, and 10 to 20% were CD8+. In comparison to CD8+ TCR-alpha beta T cells, the population of CD8+ TCR-gamma delta-bearing T cells exhibited reduced levels of CD8, and about 70% of the CD8+ TCR-gamma delta cells did not express Lyt-3 on the cell surface. Functional studies demonstrated that splenic TCR-gamma delta cells proliferated when stimulated with mAb directed against CD3-epsilon, Thy-1, and Ly-6C, but not when incubated with an anti-TCR V beta 8 mAb, consistent with the lack of TCR-alpha beta expression. In addition, activated CD3+,CD4-,CD8- peripheral murine TCR-gamma delta cells were capable of lysing syngeneic FcR-bearing targets in the presence of anti-CD3-epsilon mAb and the NK-sensitive cell line, YAC-1, in the absence of anti-CD3-epsilon mAb. Finally, activated CD3+, CD4-,CD8-,TCR-gamma delta+ splenocytes were also capable of producing IL-2, IL-3, IFN-gamma, and TNF when stimulated in vitro with anti-CD3-epsilon mAb.

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Accession: 040965893

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PMID: 2523934

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