Chemokine signaling pathway

Chemokine signaling is a complex biological pathway mediated by a family of small cytokines called chemokines and their corresponding G protein-coupled receptors (GPCRs) (KEGG: map04062). This pathway is fundamental for directing the migration of immune cells, a process known as chemotaxis, to sites of infection or injury, and it also regulates homeostatic processes like lymphocyte trafficking and lymphoid organ development (Nature Reviews Drug Discovery, 2019). In various disease states, dysregulated chemokine signaling contributes to chronic inflammation, autoimmune disorders, and cancer progression, particularly by facilitating tumor cell metastasis and shaping the immunosuppressive tumor microenvironment (PubMed: 27591333). Pharmacological intervention typically involves small molecule antagonists or monoclonal antibodies that target specific receptors, such as CCR5 for HIV entry inhibition or CXCR4 for hematopoietic stem cell mobilization (FDA). However, the high degree of redundancy within the chemokine system, where multiple ligands can bind to the same receptor and vice versa, presents a significant challenge for achieving therapeutic specificity and efficacy (StatPearls: Chemokines).

Other names

Chemokine-mediated signalingChemotactic cytokine signalingChemokine receptor signaling

Antagonism of specific G protein-coupled chemokine receptors to inhibit ligand binding and subsequent intracellular signaling cascades, thereby preventing leukocyte recruitment or viral entry.