Chemokine receptor family (CCRs)

Chemokine-mediated recruitment and differentiation of monocytes into dendritic cells is a central process in immune system activation, tissue homeostasis, and inflammation. Chemokines such as CCL2, CCL19, CCL21, and CXCL14 bind to their respective G protein-coupled receptor targets (CCR2, CCR6, CCR7, CCR8), guiding monocytes from the bloodstream into tissues, where they can differentiate into dendritic cells under the influence of local signals and transcription factors (e.g., ZNF366 and MAFF for DC fate; IRF1 for macrophage fate). DC migration to lymph nodes is orchestrated particularly via the CCR7/CCL19/CCL21 axis, which is necessary for initiating adaptive immunity. Alteration of these pathways by disease, drugs, or genetic mutations impacts inflammation, infection response, and immune tolerance. Therapeutic targeting of chemokine receptors is being pursued, but redundant and overlapping chemokine functions present challenges in drug specificity and safety.

Other names

Chemokine receptors (CCR2, CCR6, CCR7, CCR8)monocyte/dendritic cell chemotaxisCCL2 receptorCCL19 receptorCCL21 receptorCXCL14 receptor (putative)monocyte-derived dendritic cell pathway

Chemokine receptor antagonism blocks monocyte recruitment or DC migration; Small-molecule inhibition of signal transduction cascades (e.g., JAK/STAT, NOX inhibition)