C-C motif chemokine ligand 24 is a protein that in humans is encoded by the CCL24 gene. CCL24 is also known as myeloid progenitor inhibitory factor 2 (MPIF-2) or eosinophil chemotactic protein 2 (eotaxin-2).
Function
CCL24 belongs to the subfamily of small cytokine CC genes. Cytokines are a family of secreted proteins involved in immunoregulatory and inflammatory processes. The CC cytokines are proteins characterized by two adjacent cysteines. CCL24 interacts with chemokine receptorCCR3 to induce chemotaxis in eosinophils. The cytokine encoded by this gene displays chemotactic activity on resting T lymphocytes, a minimal activity on neutrophils, and is negative on monocytes and activated T lymphocytes. The protein is also a strong suppressor of colony formation by a multipotential hematopoietic progenitor cell line.
Clinical significance
Elevated levels of eotaxin-2 has been seen in patients with aspirin-exacerbated respiratory disease (AERD), such as asthma. People with lower plasma levels of eotaxin-2 have not been showing tendency to develop aspirin inducible asthma.
Tachimoto H, Kikuchi M, Hudson SA, Bickel CA, Hamilton RG, Bochner BS (June 2002). "Eotaxin-2 alters eosinophil integrin function via mitogen-activated protein kinases". Am. J. Respir. Cell Mol. Biol. 26 (6): 645–9. doi:10.1165/ajrcmb.26.6.4741. PMID12034562.
Badewa AP, Hudson CE, Heiman AS (September 2002). "Regulatory effects of eotaxin, eotaxin-2, and eotaxin-3 on eosinophil degranulation and superoxide anion generation". Exp. Biol. Med. (Maywood). 227 (8): 645–51. doi:10.1177/153537020222700814. PMID12192108. S2CID32212646.
Chae SC, Lee YC, Park YR, Shin JS, Song JH, Oh GJ, Hong ST, Pae HO, Choi BM, Chung HT (July 2004). "Analysis of the polymorphisms in eotaxin gene family and their association with asthma, IgE, and eosinophil". Biochem. Biophys. Res. Commun. 320 (1): 131–7. doi:10.1016/j.bbrc.2004.05.136. PMID15207712.
Chae SC, Park YR, Oh GJ, Lee JH, Chung HT (January 2005). "The suggestive association of eotaxin-2 and eotaxin-3 gene polymorphisms in Korean population with allergic rhinitis". Immunogenetics. 56 (10): 760–4. doi:10.1007/s00251-004-0746-2. PMID15580493. S2CID45416407.
Min JW, Jang AS, Park SM, Lee SH, Lee JH, Park SW, Park CS (November 2005). "Comparison of plasma eotaxin family level in aspirin-induced and aspirin-tolerant asthma patients". Chest. 128 (5): 3127–32. doi:10.1378/chest.128.5.3127. PMID16304252.