Cutting edge: instructive role of peripheral tissue cells in the imprinting of T cell homing receptor patterns

F Edele, R Molenaar, D Gütle, JC Dudda… - The Journal of …, 2008 - journals.aai.org
F Edele, R Molenaar, D Gütle, JC Dudda, T Jakob, B Homey, R Mebius, M Hornef…
The Journal of Immunology, 2008journals.aai.org
Tissue-specific homing of effector and memory T cells to skin and small intestine requires
the imprinting of specific combinations of adhesion molecules and chemokine receptors by
dendritic cells in the draining lymph nodes. In this study, we demonstrate that CD8+ T cells
activated by Ag-pulsed bone marrow-derived dendritic cells were induced to express the
small intestine homing receptors α 4 β 7 integrin and chemokine receptor CCR9 in coculture
with small intestinal epithelial cells. In contrast, in coculture with dermal fibroblasts the skin …
Abstract
Tissue-specific homing of effector and memory T cells to skin and small intestine requires the imprinting of specific combinations of adhesion molecules and chemokine receptors by dendritic cells in the draining lymph nodes. In this study, we demonstrate that CD8+ T cells activated by Ag-pulsed bone marrow-derived dendritic cells were induced to express the small intestine homing receptors α 4 β 7 integrin and chemokine receptor CCR9 in coculture with small intestinal epithelial cells. In contrast, in coculture with dermal fibroblasts the skin-homing receptor E-selectin ligand was induced. Interestingly, the imprinting of gut homing receptors on anti-CD3/anti-CD28 stimulated T cells was induced by soluble factors produced by small intestinal epithelial cells. Retinoic acid was identified as a crucial factor. These findings show that peripheral tissue cells directly produce homing receptor imprinting factors and suggest that dendritic cells can acquire their imprinting potential already in the peripheral tissue of origin.
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