Ccl17
Developmental stage
Not detected in the thymus before birth.
Function
Chemokine, which displays chemotactic activity for T lymphocytes, preferentially Th2 cells, but not monocytes or granulocytes. Therefore plays an important role in a wide range of inflammatory and immunological processes (PubMed:10508243, PubMed:10508268). Acts by binding to CCR4 at T-cell surface (By similarity). Mediates GM-CSF/CSF2-driven pain and inflammation (PubMed:27525438). In the brain, required to maintain the typical, highly branched morphology of hippocampal microglia under homeostatic conditions. May be important for the appropriate adaptation of microglial morphology and synaptic plasticity to acute lipopolysaccharide (LPS)-induced neuroinflammation (PubMed:30277599). Plays a role in wound healing, mainly by inducing fibroblast migration into the wound (PubMed:21521373).
Sequence Similarities
Belongs to the intercrine beta (chemokine CC) family.
Tissue Specificity
Expressed in primary and secondary lymphoid organs, where it is specifically produced by a subset of dendritic cells. Not expressed in the spleen (PubMed:12615900). Constitutively expressed in thymus, as well as in the lung, skin and intestine (PubMed:10508243, PubMed:10508268, PubMed:12615900). Not expressed in bone marrow-derived macrophages and activated B cells, nor in thymocytes (PubMed:10508243, PubMed:10508268). In the brain, predominantly expressed in a subset of hippocampal CA1 neurons (PubMed:30277599).
Cellular localization
- Secreted
Alternative names
Tarc, Ccl17, C-C motif chemokine 17, ABCD-2, CC chemokine TARC, Small-inducible cytokine A17, Thymus and activation-regulated chemokine, TARC/CCL17