Recombinant Human IL-17A Protein, CF


Recombinant Human IL-17 (Catalog # 317-ILB) induces CXCL1/GRO alpha secretion in HT‑29human colon adenocarcinoma cells. The ED50 for this effect is 0.4‑4 ng/mL.

Product Details

Reactivity HuSpecies Glossary
Applications Bioactivity

Order Details

Recombinant Human IL-17A Protein, CF Summary

Additional Information
New rh IL-17A Available! ~4 fold better activity; HEK293 expressed; Lower endotoxin specification!
Details of Functionality
Measured by its ability to induce CXCL1/GRO alpha secretion in HT‑29 human colon adenocarcinoma cells. The ED50 for this effect is 0.4-4 ng/mL. Measured by its ability to induce IL-6 secretion by NIH‑3T3 mouse embryonic fibroblast cells. Yao, Z. et al. (1995) Immunity 3:811. The ED50 for this effect is 1.5-7.5 ng/mL.
E. coli-derived human IL-17/IL-17A protein
Ile20-Ala155, with an N-terminal Met
Accession #
N-terminal Sequence
Structure / Form
Disulfide-linked homodimer
Protein/Peptide Type
Recombinant Proteins
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.


Theoretical MW
16 kDa (monomer).
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.
Read Publications using
317-ILB in the following applications:

Packaging, Storage & Formulations

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.
Lyophilized from a 0.2 μm filtered solution in HCl.
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Reconstitution Instructions
Reconstitute at 100 μg/mL in 4 mM HCl.


This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human IL-17A Protein, CF

  • CTLA8
  • CTLA-8
  • CTLA8cytotoxic T-lymphocyte-associated serine esterase 8
  • Cytotoxic T-lymphocyte-associated antigen 8
  • IL17
  • IL-17
  • IL17A
  • IL-17A
  • IL-17Acytotoxic T-lymphocyte-associated protein 8
  • IL-17CTLA-8
  • IL17interleukin-17A
  • interleukin 17 (cytotoxic T-lymphocyte-associated serine esterase 8)
  • interleukin 17A


Interleukin-17A (IL-17A), also known as CTLA-8, is a 15-20 kDa glycosylated cytokine that plays an important role in anti-microbial and chronic inflammation. The six IL-17 cytokines (IL-17A-F) are encoded by separate genes but adopt a conserved cystine knot fold (1, 2). Mature human IL-17A shares 60% amino acid sequence identity with mouse and rat IL-17A (3, 4). IL-17A is secreted by Th17 cells, gamma /δ T cells, iNKT cells, NK cells, LTi cells, neutrophils, and intestinal Paneth cells (2). It forms disulfide-linked homodimers as well as disulfide-linked heterodimers with IL-17F (5, 6). IL-17A exerts its effects through the transmembrane IL-17RA in complex with IL-17RC or IL-17RD (7, 8). Both IL-17RA and IL-17RC are required for responsiveness to heterodimeric IL-17A/F (7). IL-17A promotes protective mucosal and epidermal inflammation in response to microbial infection (9‑12). It induces chemokine production, neutrophil influx, and the production of antibacterial peptides (9‑11). IL-17A/F likewise induces neutrophil migration, but IL-17F does not (11). IL-17A additionally enhances the production of inflammatory mediators by rheumatoid synovial fibroblasts and contributes to TNF-alpha induced shock (4, 13). In contrast, it can protect against the progression of colitis by limiting chronic inflammation (12). IL-17A encourages the formation of autoreactive germinal centers and exacerbates the onset and progression of experimental models of autoimmunity (14, 15).
IL-17A has been shown to exert either tumorigenic or anti-tumor effects (16, 17).
  1. Gaffen, S.L. (2009) Nat. Rev. Immunol. 9:556.
  2. Cua, D.J. and C.M. Tato (2010) Nat. Rev. Immunol. 10:479.
  3. Yao, Z. et al. (1995) J. Immunol. 155:5483.
  4. Fossiez, F. et al. (1996) J. Exp. Med. 183:2593.
  5. Chang, S.H. and C. Dong (2007) Cell Res. 17:435.
  6. Wright, J.F. et al. (2007) J. Biol. Chem. 282:13447.
  7. Wright, J.F. et al. (2008) J. Immunol. 181:2799.
  8. Rong, Z. et al. (2009) Cell Res. 19:208.
  9. Cho, J.S. et al. (2010) J. Clin. Invest. 120:1762.
  10. Liang, S.C. et al. (2006) J. Exp. Med. 203:2271.
  11. Liang, S.C. et al. (2007) J. Immunol. 179:7791.
  12. O’Connor Jr., W. et al. (2009) Nat. Immunol. 10:603.
  13. Takahashi, N. et al. (2008) J. Exp. Med. 205:1755.
  14. Hsu, H. et al. (2008) Nat. Immunol. 9:166.
  15. Rohn, T.A. et al. (2006) Eur. J. Immunol. 36:2857.
  16. Wang, L. et al. (2009) J. Exp. Med. 206:1457.
  17. Kryczek, I. et al. (2009) Blood 114:357.

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Publications for IL-17/IL-17A (317-ILB)(81)

We have publications tested in 5 confirmed species: Human, Mouse, Complex Species Category, N/A, Rabbit.

We have publications tested in 9 applications: Bioassay, Cell Culture, ELISA (Capture), ELISA (Specificity Testing), ELISA (Standard), ELISA Development (Detection), ELISA Standard, In Vivo, Surface Plasmon Resonance.

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Showing Publications 1 - 10 of 81. Show All 81 Publications.
Publications using 317-ILB Applications Species
RA Lu, AA Zeki, S Ram-Mohan, N Nguyen, Y Bai, K Chmiel, S Pecic, X Ai, R Krishnan, CC Ghosh Inhibiting Airway Smooth Muscle Contraction Using Pitavastatin: A Role for the Mevalonate Pathway in Regulating Cytoskeletal Proteins Front Pharmacol, 2020;11(0):469. 2020 [PMID: 32435188] (Cell Culture, Human) Cell Culture Human
J Lu, G Jiang, Y Wu, S Antony, JL Meitzler, A Juhasz, H Liu, K Roy, H Makhlouf, R Chuaqui, D Butcher, MM Konaté, JH Doroshow NADPH oxidase 1 is highly expressed in human large and small bowel cancers PLoS ONE, 2020;15(5):e0233208. 2020 [PMID: 32428030] (Bioassay, Human) Bioassay Human
L Mercurio, D Lulli, F Mascia, E Dellambra, C Scarponi, M Morelli, C Valente, ML Carbone, S Pallotta, G Girolomoni, C Albanesi, S Pastore, S Madonna Intracellular Insulin-like growth factor binding protein 2 (IGFBP2) contributes to the senescence of keratinocytes in psoriasis by stabilizing cytoplasmic p21 Aging (Albany NY), 2020;12(8):6823-6851. 2020 [PMID: 32302288] (Cell Culture, Human) Cell Culture Human
D Deli?, K Wolk, R Schmid, O Gabrielyan, D Christou, K Rieber, M Rolser, I Jakob, F Wiech, M Griesser, C Wohnhaas, G Kokolakis, E Witte-Händ, P Baum, R Sabat Integrated microRNA/mRNA expression profiling of the skin of psoriasis patients J. Dermatol. Sci., 2019;0(0):. 2019 [PMID: 31843230] (Bioassay, Human) Bioassay Human
X Xu, H Fukui, Y Ran, X Wang, Y Inoue, N Ebisudani, H Nishimura, T Tomita, T Oshima, J Watari, H Kiyama, H Miwa The Link between Type III Reg and STAT3-Associated Cytokines in Inflamed Colonic Tissues Mediators Inflamm., 2019;2019(0):7859460. 2019 [PMID: 31780871] (Bioassay, Human) Bioassay Human
C Merriman, D Fu Down-regulation of the islet-specific zinc transporter-8 (ZnT8) protects human insulinoma cells against inflammatory stress J. Biol. Chem., 2019;0(0):. 2019 [PMID: 31591269] (Bioassay, Human) Bioassay Human
Y Wu, MM Konaté, J Lu, H Makhlouf, R Chuaqui, S Antony, JL Meitzler, MJ Difilippan, H Liu, A Juhasz, G Jiang, I Dahan, K Roy, JH Doroshow IL-4 and IL-17A Cooperatively Promote Hydrogen Peroxide Production, Oxidative DNA Damage, and Upregulation of Dual Oxidase 2 in Human Colon and Pancreatic Cancer Cells J. Immunol., 2019;0(0):. 2019 [PMID: 31548328] (Bioassay, Human) Bioassay Human
JC Chamcheu, S Esnault, VM Adhami, AL Noll, S Banang-Mbe, T Roy, SS Singh, S Huang, KG Kousoulas, H Mukhtar Fisetin, a 3,7,3&#039;,4&#039;-Tetrahydroxyflavone Inhibits the PI3K/Akt/mTOR and MAPK Pathways and Ameliorates Psoriasis Pathology in 2D and 3D Organotypic Human Inflammatory Skin Models Cells, 2019;8(9):. 2019 [PMID: 31540162] (ELISA Standard, Human) ELISA Standard Human
X Qin, M Liu, S Zhang, C Wang, T Zhang The role of IL-36? and its regulation in eosinophilic inflammation in allergic rhinitis Cytokine, 2019;117(0):84-90. 2019 [PMID: 30831444] (Bioassay, Human) Bioassay Human
L Mercurio, M Morelli, C Scarponi, EZ Eisenmesse, N Doti, G Pagnanelli, E Gubinelli, C Mazzanti, A Cavani, M Ruvo, CA Dinarello, C Albanesi, S Madonna IL-38 has an anti-inflammatory action in psoriasis and its expression correlates with disease severity and therapeutic response to anti-IL-17A treatment Cell Death Dis, 2018;9(11):1104. 2018 [PMID: 30377293] (Bioassay, Human) Bioassay Human
Show All 81 Publications.

Reviews for IL-17/IL-17A (317-ILB) (0)

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FAQs for IL-17/IL-17A (317-ILB). (Showing 1 - 2 of 2 FAQs).

  1. I want to stain some T cell subsets (Th17 and Th1), do you have antibodies for that? I need for flow cytometer in sheep or goat.
    • Unfortunately, we have neither a CD4 antibody nor an IL-17 antibody that has been validated in sheep or goat, although if you would like to try one you would again be eligible for our Innovators Reward Program. Please contact us at with any questions regarding this program.
  2. I'm looking to establish an ELISA for IL-17 and want your recommendation on which antibody pairs to buy. Least expensive ones, please. Also, I'd like the detection antibody to be fluorescently labeled.
    • Thank you for your patience while I reviewed our ELISA validated products for IL17. I was not sure what species you were going to be investigating, so I looked up our data for the human protein. If this is incorrect, just let me know and I can look up products for the species you will be working with. As for antibody pairs, we only had one set that have been tested together: Capture: NBP2-22531 Detection: NBP2-22532. The detection product is only available currently with a biotin conjugate. We can however offer custom conjugation for this product to any of our available conjugates. Please see the following link to see the available fluors: The typical fee for custom conjugation is usually about $80 additional. Once you know which fluor you would like, I can provide you with a quote. We do also offer several ELISA kits for this target (they typically employ HRP or Biotin detection systems, so I am not sure if they will work for your needs).

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Gene Symbol IL17A