Recombinant Feline IL-8/CXCL8 Protein

Catalog #: 2277-FL Datasheet / COA / SDS

Carrier Free

Catalog #	Availability	Size / Price	Qty
2277-FL-025/CF

With Carrier

Catalog #	Availability	Size / Price	Qty
2277-FL-025

R&D Systems Recombinant Proteins and Enzymes

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Summary Product Datasheets Carrier Free Data Images Reconstitution Calculator Background Related Research Areas

Recombinant Feline IL-8/CXCL8 Protein Summary

Product Specifications

Purity

>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.

Endotoxin Level

<0.10 EU per 1 μg of the protein by the LAL method.

Activity

Measured by its ability to chemoattract BaF3 mouse pro‑B cells transfected with human CXCR2. The ED₅₀ for this effect is 2-10 ng/mL.

Source

E. coli-derived feline IL-8/CXCL8 protein
Ala23-Ala101

Accession #

Q9XSX5.1

N-terminal Sequence
Analysis

Ala23

Predicted Molecular Mass

9 kDa

Product Datasheets

2277-FL (with carrier)

Product Datasheet

COA

SDS

2277-FL/CF (carrier free)

Product Datasheet

COA

SDS

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

2277-FL

Formulation	Lyophilized from a 0.2 μm filtered solution in Acetonitrile and TFA with BSA as a carrier protein.
Reconstitution	Reconstitute at 10 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.
Shipping	The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:	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.

2277-FL/CF

Formulation	Lyophilized from a 0.2 μm filtered solution in Acetonitrile and TFA.
Reconstitution	Reconstitute at 100 μg/mL in sterile PBS.
Shipping	The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:	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.

Reconstitution Calculator

Background: IL-8/CXCL8

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. Near its N-terminus, this 8-9 kDa chemokine contains an ELR motif which is important for its angiogenic properties (1). CXCL8 can associate into a homodimer or a heterodimer with CXCL4/PF4 (2), and it can also interact with matrix and cell surface glycosaminoglycans (3). Mature feline CXCL8 shares 87%, 68%, and 78% amino acid (aa) sequence identiity with canine, human, and porcine 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, by CXCL8 citrullination at Arg5 (N-terminal to the ELR motif) (6), and by the decoy receptor DARC (7). 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 (8). Through both CXCR1 and CXCR2, CXCL8 promotes neutrophil adhesion to the vascular endothelium and migration to sites of inflammation (9). It triggers the antimicrobial activation of neutrophils through CXCR1 (10). CXCL8 also binds to Serpin A1/alpha-1 Antitrypsin, and this prevents CXCL8 interaction with CXCR1 (11). CXCL8 is upregulated in atherosclerotic lesions and other cardiac pathologies where it exacerbates inflammatory tissue damage (12). In addition, it induces VEGF expression, vascular endothelial cell proliferation, angiogenesis, and tumor cell invasiveness (13-16).

References

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.
Schmid, J. and C. Weissmann (1987) J. Immunol. 139:250.
Mortier, A. et al. (2008) Pharmacol. Ther. 120:197.
Proost, P. et al. (2008) J. Exp. Med. 205:2085.
Neote, K. et al. (1994) Blood 84:44.
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.
Fernando, R.I. et al. (2011) Cancer Res. 71:5296.

Long Name

Interleukin 8

Entrez Gene IDs

3576 (Human); 396880 (Porcine); 403850 (Canine); 493836 (Feline)

Alternate Names

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