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chemokine (C-X-C motif) ligand 2
Alt. symbolsSCYB2, GRO2, GROb, MIP-2a, MGSA-b, CINC-2a
Other data
LocusChr. 4 q21

Chemokine (C-X-C motif) ligand 2 (CXCL2) is a small cytokine belonging to the CXC chemokine family that is also called macrophage inflammatory protein 2-alpha (MIP2-alpha), Growth-regulated protein beta (Gro-beta) and Gro oncogene-2 (Gro-2). CXCL2 is 90% identical in amino acid sequence as a related chemokine, CXCL1. This chemokine is secreted by monocytes and macrophages and is chemotactic for polymorphonuclear leukocytes and hematopoietic stem cells.[1][2][3] The gene for CXCL2 is located on human chromosome 4 in a cluster of other CXC chemokines.[4] CXCL2 mobilizes cells by interacting with a cell surface chemokine receptor called CXCR2.[3]

CXCL2, like related chemokines, is also a powerful neutrophil chemoattractant and is involved in many immune responses including wound healing, cancer metastasis, and angiogenesis.[5] A study was published in 2013 testing the role of CXCL2, CXCL3, and CXCL1 in the migration of airway smooth muscle cells (ASMCs) migration which plays a significant role in asthma. The results of this study showed that CXCL2 and CXCL3 both help with the mediation of normal and asthmatic ASMC migration through different mechanisms.[5]


  1. Wolpe SD, Sherry B, Juers D, Davatelis G, Yurt RW, Cerami A (January 1989). "Identification and characterization of macrophage inflammatory protein 2". Proceedings of the National Academy of Sciences of the United States of America. 86 (2): 612–6. PMC 286522. PMID 2643119.
  2. Iida N, Grotendorst GR (October 1990). "Cloning and sequencing of a new gro transcript from activated human monocytes: expression in leukocytes and wound tissue". Molecular and Cellular Biology. 10 (10): 5596–9. PMC 361282. PMID 2078213.
  3. 3.0 3.1 Pelus LM, Fukuda S (August 2006). "Peripheral blood stem cell mobilization: the CXCR2 ligand GRObeta rapidly mobilizes hematopoietic stem cells with enhanced engraftment properties". Experimental Hematology. 34 (8): 1010–20. doi:10.1016/j.exphem.2006.04.004. PMID 16863907.
  4. O'Donovan N, Galvin M, Morgan JG (1999). "Physical mapping of the CXC chemokine locus on human chromosome 4". Cytogenetics and Cell Genetics. 84 (1–2): 39–42. doi:10.1159/000015209. PMID 10343098.
  5. 5.0 5.1 Al-Alwan LA, Chang Y, Mogas A, Halayko AJ, Baglole CJ, Martin JG, Rousseau S, Eidelman DH, Hamid Q (September 2013). "Differential roles of CXCL2 and CXCL3 and their receptors in regulating normal and asthmatic airway smooth muscle cell migration". Journal of Immunology. 191 (5): 2731–41. doi:10.4049/jimmunol.1203421. PMC 3748335. PMID 23904157.