Recombinant Human IL-8 (Animal-Free)

Product Details

Source

Human IL-8, amino acids Ser28-Ser99 (Accession# NM_000584) was expressed in E. coli.

Molecular Mass

The 72 amino acid recombinant protein has a predicted molecular mass of 8.4 kD. The predicted N-terminal amino acid is Ser.

Purity

>98%, as determined by Coomassie stained SDS-PAGE and HPLC analysis.

Formulation

Lyophilized, carrier-free.

Endotoxin Level

Less than 0.1 ng per µg of protein.

Storage & Handling

Unopened vial can be stored at -20°C or -70°C. For maximum results, quick spin vial prior to opening. Reconstitute in water to a concentration of 0.1-1.0 mg/ml. Do not vortex. It is recommended to further dilute in a buffer, such as 5% Trehalose, and store working aliquots at -20°C to -80°C. Avoid repeated freeze/thaw cycles.

Activity

Bioactivity was measured by its property to chemoattract human peripheral blood neutrophils in a dose dependent manner. The chemotactic activity was detected from 10 to 100 ng/ml.

Application

Bioassay

Product Citations

1. Lee SWL, et al. 2020. Integr Biol (Camb). 90:12. PubMed

Antigen Details

Structure

Chemokine

Distribution

IL-8 is expressed by neutrophils, mococytes, macrophages, mast cells, endothelial cells, fibroblasts, keratinocytes, synovial cells, chondrocytes, epithelial cells, megakariocytes, melanocytes, hepatocytes, mesangial, and tumor cells. Most primary and metastatic solid tumors, such as breast, uterine, prostate, colon, and pancreatic carcinomas, melanoma, and glioblastoma, constitutively express IL-8.

Function

CXCL8 has diverse functions in immune surveillance, inflammation, and angiogenesis. CXCL8 directly modulates endothelial cell proliferation and migration, thus promoting angiogenesis. IL-8 modulates myelopoiesis by suppressing the myeloid progenitor proliferation. IL-8 also modulates the homing of hematopoitic progenitors by affecting the secretion of MMPs and TIMPs from bone marrow and peripheral blood CD34⁺ cells. Monocytes and macrophages generate IL-8 upon stimulation with IL-1α, IL-1β, TNF-α, IL-3, GMCSF, endotoxin, lectins, phorbol esters, immune complexes, and phagocytosis. Opsonized particles are also a prime stimulus for IL-8 production by neutrophils.

Interaction

Neutrophils, basophils, highly cytotoxic CD8 T cells, megakariocytes, endothelial cells.

Ligand/Receptor

CXCR1 (CDw128a) and CXCR2.

Biology Area

Cell Biology, Immunology, Neuroinflammation, Neuroscience

Molecular Family

Cytokines/Chemokines

Antigen References

1. Hess C, et al. 2004. Blood 104:3463.
2. Emadi S, et al. 2005. Blood 105:464.
3. Matsuo Y, et al. 2009. Int. J. Cancer 4:853.
4. Drewniak A, et al. 2010. Blood 115:4588.

Gene ID

3576 View all products for this Gene ID

UniProt

View information about IL-8 on UniProt.org

Documentation

• Technical data sheet
• Certificate of Analysis
• Safety Data Sheet

Reviews

Related Pages & Pathways

Related FAQs

Why choose BioLegend recombinant proteins?

     • Each lot of product is quality-tested for bioactivity as indicated on the data sheet.
     • Greater than 95% Purity or higher, tested on every lot of product.
     • 100% Satisfaction Guarantee for quality performance, stability, and consistency.
     • Ready-to-use liquid format saves time and reduces challenges associated with reconstitution.
     • Bulk and customization available. Contact us.
     • Learn more about our Recombinant Proteins.

How does the activity of your recombinant proteins compare to competitors?

We quality control each and every lot of recombinant protein. Not only do we check its bioactivity, but we also compare it against other commercially available recombinant proteins. We make sure each recombinant protein’s activity is at least as good as or better than the competition’s. In order to provide you with the best possible product, we ensure that our testing process is rigorous and thorough. If you’re curious and eager to make the switch to BioLegend recombinants, contact your sales representative today!

What is the specific activity or ED50 of my recombinant protein?

The specific activity range of the protein is indicated on the product datasheets. Because the exact activity values on a per unit basis can largely fluctuate depending on a number of factors, including the nature of the assay, cell density, age of cells/passage number, culture media used, and end user technique, the specific activity is best defined as a range and we guarantee the specific activity of all our lots will be within the range indicated on the datasheet. Please note this only applies to recombinants labeled for use in bioassays. ELISA standard recombinant proteins are not recommended for bioassay usage as they are not tested for these applications.

Have your recombinants been tested for stability?

Our testing shows that the recombinant proteins are able to withstand room temperature for a week without losing activity. In addition the recombinant proteins were also found to withstand four cycles of freeze and thaw without losing activity.

Does specific activity of a recombinant protein vary between lots?

Specific activity will vary for each lot and for the type of experiment that is done to validate it, but all passed lots will have activity within the established ED50 range for the product and we guarantee that our products will have lot-to-lot consistency. Please conduct an experiment-specific validation to find the optimal ED50 for your system.

How do you convert activity as an ED50 in ng/ml to a specific activity in Units/mg?

Use formula Specific activity (Units/mg) = 10^6/ ED50 (ng/mL)

Certificate of Analysis