Dendritic cell-T cell interactions: CD8αα expressed on dendritic cells regulates T cell proliferation

Li Hong, Tonya J. Webb, David S. Wilkes

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Expression of the CD8αα homodimer has been used to differentiate lymphoid (CD8α+) from myeloid (CD8α-) dendritic cells (DCs). We have reported that CD8α+ and CD8α- DCs have differential abilities to stimulate proliferation in allogeneic T cells. However, no specific function has been attributed to DC-derived CD8α. The current study examines the hypothesis that CD8αα expression on DCs regulates DC-induced T cell activation. CD8α- transduced bone marrow-derived DCs were more potent stimulators of T cell proliferation, and produced significantly greater quantities of IL-12 in co-culture with T cells. LCK, a kinase whose expression is reported to be T cell-restricted and known to bind to the cytoplasmic tail of CD8αβ in T cells, was detected readily in primary CD8α+ splenic DCs and at greater levels than CD8α- DCs from the same tissues. LCK also co-precipitated with CD8α on immunblots strongly suggesting its role in CD8α+ DC-induced T cell activation. Collectively, these data show that CD8α expressed on DC may not only be a lineage/maturation marker but also contribute to DC function.

Original languageEnglish
Pages (from-to)174-178
Number of pages5
JournalImmunology Letters
Volume108
Issue number2
DOIs
StatePublished - Feb 15 2007

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Cell Communication
Dendritic Cells
Cell Proliferation
T-Lymphocytes
Interleukin-12
Coculture Techniques
Phosphotransferases
Bone Marrow

Keywords

  • CD8α
  • Dendritic cells
  • Lymphoid

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy

Cite this

Dendritic cell-T cell interactions : CD8αα expressed on dendritic cells regulates T cell proliferation. / Hong, Li; Webb, Tonya J.; Wilkes, David S.

In: Immunology Letters, Vol. 108, No. 2, 15.02.2007, p. 174-178.

Research output: Contribution to journalArticle

Hong, Li ; Webb, Tonya J. ; Wilkes, David S. / Dendritic cell-T cell interactions : CD8αα expressed on dendritic cells regulates T cell proliferation. In: Immunology Letters. 2007 ; Vol. 108, No. 2. pp. 174-178.
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