Human OX40 Antibody Summary
Leu29-Ala216
Accession # P43489
*Small pack size (-SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
Applications
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
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Detection of OX40/TNFRSF4 in Human PBMCs by Flow Cytometry. Human peripheral blood mononuclear cells (PBMCs) were treated with 5 μg/ml PHA for 5 days then stained with Mouse Anti-Human CD3e APC-conjugated Monoclonal Antibody (Catalog # FAB100A) and either (A) Rat Anti-Human OX40/TNFRSF4 Monoclonal Antibody (Catalog # MAB3388) or (B) Rat IgG2AIsotype Control (MAB006) followed by Phycoerythrin-conjugated Anti-Rat IgG Secondary Antibody (F0105B). View our protocol for Staining Membrane-associated Proteins.
Preparation and Storage
- 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 co‑stimulatory molecule of the TNF receptor superfamily that coordinates with other membrane-bound co‑stimulators 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 co‑stimulation 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).
- Salek-Ardakani, S. and M. Croft (2006) Vaccine 24:872.
- Hori, T. (2006) Int. J. Hematol. 83:17.
- Latza, U. et al. (1994) Eur. J. Immunol. 24:677.
- Murata, K. et al. (2000) J. Exp. Med. 191:365.
- Fillatreau, S and D. Gray (2003) J. Exp. Med. 197:195.
- Gramaglia, I. et al. (1998) J. Immunol. 161:6510.
- Rogers, P.R. et al. (2001) Immunity 15:445.
- Song, J. et al. (2005) Immunity 22:621.
- Bansal-Pakala, P. et al. (2001) Nat. Med. 7:907.
- Salek-Ardakani, S. et al. (2003) J. Exp. Med. 198:315.
- Jember, A. G. et al. (2001) J. Exp. Med. 193:387.
- Demirci, G. et al. (2004) J. Immunol. 172:1691.
- Blazar, B.R. et al. (2003) Blood 101:3741.
- Higgins, L.M. et al. (1999) J. Immunol. 162:486.
Product Datasheets
Citation for Human OX40 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.
1 Citation: Showing 1 - 1
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The neonatal Fc receptor (FcRn) binds independently to both sites of the IgG homodimer with identical affinity
Authors: Yasmina Noubia Abdiche, Yik Andy Yeung, Javier Chaparro-Riggers, Ishita Barman, Pavel Strop, Sherman Michael Chin et al.
mAbs
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