Human OX40/TNFRSF4 Antibody

Catalog # Availability Size / Price Qty
Detection of Human OX40/TNFRSF4 by Western Blot.
4 Images
Product Details
Citations (2)
Supplemental Products

Human OX40/TNFRSF4 Antibody Summary

Species Reactivity
Detects human OX40/TNFRSF4 in direct ELISAs and Western blots. In direct ELISAs, less than 5% cross-reactivity with recombinant mouse OX40 is observed.
Polyclonal Sheep IgG
Antigen Affinity-purified
Mouse myeloma cell line NS0-derived recombinant human OX40
Accession # P43489
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.


Recommended Concentration
Western Blot
0.5 µg/mL
See below
Flow Cytometry
0.25 µg/106 cells
See below
3-15 µg/mL
See below
Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.
Measured by its ability to neutralize OX40L/TNFSF4-induced IL-8 secretion in the HT1080 human fibrosarcoma cell line transfected with human OX40/TNFRSF4. The Neutralization Dose (ND50) is typically 0.025-0.16 µg/mL in the presence of 10 ng/mL Recombinant Human OX40L/TNFSF4.

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Western Blot Detection of Human OX40/TNFRSF4 antibody by Western Blot. View Larger

Detection of Human OX40/TNFRSF4 by Western Blot. Western blot shows lysates of human T regulatory cells (Tregs) and human peripheral blood mononuclear cells (PBMCs) untreated (-) or treated (+) with 1 µg/mL PHA for 5 days. PVDF membrane was probed with 0.5 µg/mL of Sheep Anti-Human OX40/TNFRSF4 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3388) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for OX40/TNFRSF4 at approximately 45 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Flow Cytometry Detection of OX40/TNFRSF4 antibody in Human T Cells antibody by Flow Cytometry. View Larger

Detection of OX40/TNFRSF4 in Human T Cells by Flow Cytometry. Human T cells were treated for 3-5 days with 1 µg/mL PHA then stained with Sheep Anti-Human OX40/ TNFRSF4 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3388, filled histogram) or control antibody (Catalog # 5-001-A, open histogram), followed by NorthernLights™ 557-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # NL010).

Immunohistochemistry OX40/TNFRSF4 antibody in Human Tonsil by Immunohistochemistry (IHC-P). View Larger

OX40/TNFRSF4 in Human Tonsil. OX40/TNFRSF4 was detected in immersion fixed paraffin-embedded sections of human tonsil using Sheep Anti-Human OX40/TNFRSF4 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3388) at 3 µg/mL for 1 hour at room temperature followed by incubation with the Anti-Sheep IgG VisUCyte™ HRP Polymer Antibody (Catalog # VC006). Tissue was stained using DAB (brown) and counterstained with hematoxylin (blue). Specific staining was localized to plasma membrane. View our protocol for IHC Staining with VisUCyte HRP Polymer Detection Reagents.

Neutralization CXCL8/IL-8 Secretion Induced by OX40L/TNFSF4 and Neutralization by Human OX40/TNFRSF4 Antibody. View Larger

CXCL8/IL-8 Secretion Induced by OX40L/TNFSF4 and Neutralization by Human OX40/TNFRSF4 Antibody. Recombinant Human OX40L/TNFSF4 (Catalog # 1054-OX) stimulates CXCL8/IL-8 secretion in the HT1080 human fibrosarcoma cell line transfected with human OX40/TNFRSF4 in a dose-dependent manner (orange line), as measured by the Human CXCL8/IL-8 Quantikine ELISA Kit (Catalog # D8000C). CXCL8/Il-8 Secretion elicited by Recombinant Human OX40L/TNFSF4 (10 ng/mL) is neutralized (green line) by increasing concentrations of Sheep Anti-Human OX40/TNFRSF4 Polyclonal Antibody (Catalog # AF3388). The ND50 is typically 0.025-0.16 µg/mL.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Preparation and Storage

Reconstitute at 0.2 mg/mL in sterile PBS.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
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.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: OX40

OX40 (CD134; TNFRSF4) is a T cell costimulatory molecule of the TNF receptor superfamily that coordinates with other membrane-bound costimulators such as CD28, CD40, CD30, CD27 and 4-1BB (1‑3). OX40 is expressed on naïve CD4+ T cells only after engagement of the TCR by antigen presenting cells (APC; dendritic and B cells), and costimulation by CD40/CD40 ligand and CD28/B7. It is maximal at 2‑5 days post activation, or 4 hours post reactivation of memory T cells (3‑6). Human OX40 is a 48 kDa type I transmembrane glycoprotein with a 28 amino acid (aa) signal sequence, a 185 aa extracellular domain (ECD) that has four TNFR-Cys repeats and an O-glycosylated hinge region, a 20 aa transmembrane segment, and a 41 aa cytoplasmic domain (3). The ECD of human OX40 shows 71%, 68%, 67%, 64% and 64% aa identity with feline, canine, rabbit, mouse and rat OX40 ECD, respectively. Engagement of OX40 on activated CD4+ T cells by OX40 ligand on activated dendritic cells promotes T cell survival and proliferation, prolongs the immune response, and enhances the number of cells making the transition from effector to memory T cells (1‑6). OX40 signal transduction includes binding TNF receptor-associated factors (TRAFs), and activating NF kappa B and PI3 kinase to enhance expression of cytokines, antiapoptotic Bcl-2 family members, survivin and the chemokine receptor CXCR5 (5‑8). CXCR5 promotes T cell migration to germinal centers to deliver B cell help (5). Studies using knockout or transgenic mice, and agonistic or blocking antibodies, show that OX40/OX40L interaction is critical for establishing or reactivating memory T cells and breaking immune tolerance (9). Blockade of OX40 engagement is efficacious in animal models of allergic airway inflammation, graft-versus-host disease and autoimmune disease (10‑14).


  1. Salek-Ardakani, S. and M. Croft (2006) Vaccine 24:872.
  2. Hori, T. (2006) Int. J. Hematol. 83:17.
  3. Latza, U. et al. (1994) Eur. J. Immunol. 24:677.
  4. Murata, K. et al. (2000) J. Exp. Med. 191:365.
  5. Fillatreau, S and D. Gray (2003) J. Exp. Med. 197:195.
  6. Gramaglia, I. et al. (1998) J. Immunol. 161:6510.
  7. Rogers, P.R. et al. (2001) Immunity 15:445.
  8. Song, J. et al. (2005) Immunity 22:621.
  9. Bansal-Pakala, P. et al. (2001) Nat. Med. 7:907.
  10. Salek-Ardakani, S. et al. (2003) J. Exp. Med. 198:315.
  11. Jember, A. G. et al. (2001) J. Exp. Med. 193:387.
  12. Demirci, G. et al. (2004) J. Immunol. 172:1691.
  13. Blazar, B.R. et al. (2003) Blood 101:3741.
  14. Higgins, L.M. et al. (1999) J. Immunol. 162:486.
Entrez Gene IDs
7293 (Human); 22163 (Mouse); 25572 (Rat); 102145978 (Cynomolgus Monkey)
Alternate Names
ACT-135; ACT35 antigen; ACT35ATC35 antigen; CD134 antigen; CD134; Ly-70; OX40 cell surface antigen; OX40 homologue; OX40; OX40L receptor; OX40lymphoid activation antigene ACT35; TAX transcriptionally-activated glycoprotein 1 receptor; tax-transcriptionally activated glycoprotein 1 receptor; TNFRSF4; tumor necrosis factor receptor superfamily member 4; tumor necrosis factor receptor superfamily, member 4; Txgp1; TXGP1L; TXGP1LOX40 antigen

Product Datasheets

You must select a language.


Citations for Human OX40/TNFRSF4 Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

2 Citations: Showing 1 - 2
Filter your results:

Filter by:

  1. Therapeutic targeting miR130b counteracts diffuse large B-cell lymphoma progression via OX40/OX40L-mediated interaction with Th17 cells
    Authors: Rui Sun, Pei-Pei Zhang, Xiang-Qin Weng, Xiao-Dong Gao, Chuan-Xin Huang, Li Wang et al.
    Signal Transduction and Targeted Therapy
  2. Roles of OX40 and OX40 Ligand in Mycosis Fungoides and S�zary Syndrome
    Authors: Y Kawana, H Suga, H Kamijo, T Miyagaki, M Sugaya, S Sato
    International Journal of Molecular Sciences, 2021-11-22;22(22):.
    Species: Mouse
    Sample Types: In Vivo
    Applications: Neutralization


No product specific FAQs exist for this product, however you may

View all Antibody FAQs

Reviews for Human OX40/TNFRSF4 Antibody

There are currently no reviews for this product. Be the first to review Human OX40/TNFRSF4 Antibody and earn rewards!

Have you used Human OX40/TNFRSF4 Antibody?

Submit a review and receive an Amazon gift card.

$25/€18/£15/$25CAN/¥75 Yuan/¥1250 Yen for a review with an image

$10/€7/£6/$10 CAD/¥70 Yuan/¥1110 Yen for a review without an image

Submit a Review