Recombinant Human CXCL2

Chemokine (C-X-C motif) ligand 2 (CXCL2), also known as MIP2-α and GROβ, is a small, inducible cytokine belonging to the CXC chemokine family. Other chemokines in this group include IL-8, GROα, GROγ, mouse KC, ENA78, GCP2 and PBP/CTAPIII/β TG/NAP2. Since it is structurally related to IL-8, CXCL2 competes with IL-8 for binding to IL-8 receptors on neutrophils and to a lesser extent, basophils. CXCL2 is involved in attraction of polymorphonuclear granulocytes to sites of infection (1). It is active against Gram-negative (Escherichia coli) and Gram-positive (Staphyllococcus aureus) bacteria. It is secreted by monocytes and macrophages and is chemotactic for hematopoietic stem cells (2-4). MMP-12 cleaves CXCL2 at the ELR sequence motif, which is known to be the critical receptor binding motif leading to the loss of chemotactic activity (5).

The biological activity of Human GRO-Beta was determined by by its ability to induce myeloperoxidase release from cytochalasin B treated neutrophils (Schröeder, J. et al., 1987, J. Immunol. 139:3474), or chemotaxis of hCXCR2 transfected mouse BaF/3 cells. The expected ED₅₀ for these effects are typically 0.3 - 0.9 μg/ml, or 3 - 15 ng/ml, respectively.

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Ala35

Lyophilized

The predicted molecular weight of Recombinant Human CXCL2 is Mr 8 kDa.

8

This recombinant protein was lyophilized from a 0.2 μm filtered solution in 35% acetonitrile (CH₃CN) and 0.1% trifluoroacetic acid (TFA).

This lyophilized protein is stable for six to twelve months when stored desiccated at -20°C to -70°C. After aseptic reconstitution, this protein may be stored at 2°C to 8°C for one month or at -20°C to -70°C in a manual defrost freezer. Avoid Repeated Freeze Thaw Cycles. See Product Insert for exact lot specific storage instructions.

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1. Beuscher, HU. et al. (2004) International Immunol. 16: 1675
2. Cerami, A. et al. (1989) Proc Nat Acad Sci. 86: 612
3. Grotendorst, GR. et al. (1990) Mol Cell Biol. 10: 5596
4. Fukuda, S. et al. (2006) Exp Hematol. 34: 1010