Measured by its ability to induce myeloperoxidase release from cytochalasin B-treated human neutrophils. Schröder, J.M. et al. (1987) J. Immunol. 139:3474. The ED50 for this effect is 0.4‑0.6 µg/mL. Measured by its ability to chemoattract BaF3 mouse pro‑B cells transfected with human CXCR2. The ED50 for this effect is 1-5 ng/mL.
Source
E. coli-derived porcine IL-8/CXCL8 protein Ala26-Gln104
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Note
<0.01 EU per 1 μg of the protein by the LAL method.
Applications/Dilutions
Dilutions
Bioactivity
Bioactivity2
Theoretical MW
9.4 kDa. Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Publications
Read Publications using 535-IN in the following applications:
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
3 months, -20 to -70 °C under sterile conditions after reconstitution.
Buffer
Lyophilized from a 0.2 μm filtered solution in Acetonitrile and TFA with BSA as a carrier protein.
Purity
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Reconstitution Instructions
Reconstitute at 25 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Porcine IL-8/CXCL8 Protein
3-10C
AMCF-I
C-X-C motif chemokine 8
CXCL8
CXCL8SCYB8
Emoctakin
GCP1
GCP-1TSG-1
IL8
IL-8
interleukin 8
K60
LAI
LECT
LUCT
LYNAP
MDNCF
MDNCFb-ENAP
member 8
MONAP
MONAPGCP1
NAF
NAP1
NAP-1NAP1
NCF
Neutrophil-activating protein 1
Protein 3-10C
T cell chemotactic factor
T-cell chemotactic factor
TCF
TSG1
Background
Interleukin-8 (IL-8), also known as CXCL8, GCP-1, and NAP-1, is a widely expressed proinflammatory member of the CXC family of chemokines. This 8-9 kDa chemokine circulates as a monomer, homodimer, and heterodimer with CXCL4/PF4 (1, 2). Its oligomerization is modulated by interactions with matrix and cell surface glycosaminoglycans (GAGs) (3). Mature porcine CXCL8 shares 82%, 78%, and 65% amino acid (aa) sequence identiity with canine, feline, and human CXCL8 (4). There is no CXCL8 gene counterpart in rodent. N-terminal truncation of CXCL8 by multiple proteases generates a range of shorter forms (5). The bioactivity of CXCL8 is regulated by these truncations and also by CXCL8 citrullination (6). CXCL8 effects are mediated through CXCR1/IL-8 RA, which is also used by CXCL6, and through CXCR2/IL-8 RB, which is used by multiple CXC chemokines (1). These receptors associate into functional homodimers and heterodimers with each other (7). Through both CXCR1 and CXCR2, CXCL8 promotes neutrophil adhesion to the vascular endothelium and migration to sites of inflammation (8). It triggers the antimicrobial activation of neutrophils through CXCR1 (9). CXCL8 also binds to Serpin A1/alpha-1 Antitrypsin, and this prevents CXCL8 interaction with CXCR1 (10). CXCL8 is up-regulated in atherosclerotic lesions and other cardiac pathologies where it exacerbates inflammatory tissue damage (11). In addition, it induces VEGF expression, vascular endothelial cell proliferation, angiogenesis, and tumor cell invasiveness (12-15).
Lazennec, G. and A. Richmond (2010) Trends Mol. Med. 16:133.
Nesmelova, I.V. et al. (2005) J. Biol. Chem. 280:4948.
Pichert, A. et al. (2012) Biomatter 2:142.
Goodman, R.B. et al. (1992) Biochemistry 31:10483.
Mortier, A. et al. (2008) Pharmacol. Ther. 120:197.
Proost, P. et al. (2008) J. Exp. Med. 205:2085.
Munoz, L.M. et al. (2009) J. Immunol. 183:7337.
Gerszten, R.E. et al. (1999) Nature 398:718.
Jones, S.A. et al. (1996) Proc. Natl. Acad. Sci. USA 93:6682.
Bergin, D.A. et al. (2010) J. Clin. Invest. 120:4236.
Apostolakis, S. et al. (2009) Cardiovasc. Res. 84:353.
Martin, D. et al. (2009) J. Biol. Chem. 284:6038.
Li, A. et al. (2005) Angiogenesis 8:63.
Waugh, D.J. and C. Wilson (2008) Clin. Cancer Res. 14:6735.
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