OX40/TNFRSF4 Protein, Human (HEK293, His)

OX40 (TNFRSF4), is a receptor for OX40 Ligand. OX40 is preferentially expressed by T cells. OX40 can be activated by OX40 Ligand, thereby functioning as a T cell co-stimulatory molecule. The OX40-OX40 Ligand interaction promotes effector T-cell survival and effectively induces memory T-cell generation, as well as enhances the helper function of Tfh for B cells, and also promotes the differentiation and maturation of DCs^[1][2]. OX40/TNFRSF4 Protein, Human (HEK293, His) is a recombinant human OX40 (L29-A216) with C-terminal His tag, which is produced in HEK293.

OX40 (TNFRSF4), a member of TNFR superfamily, is a receptor for OX40 Ligand. OX40 is preferentially expressed by T cells, but also found in natural killer T cells, natural killer cells, neutrophils, and human airway smooth muscle cells. Human OX40 shares <30% aa sequence identity with mouse and rat. Mouse OX40 shares 90% aa sequence identity with rat^[1].
OX40 Ligand can activate OX40 and thereby functioning as a T cell co-stimulatory molecule. The OX40-OX40 Ligand interaction promotes effector T-cell survival and effectively induces memory T-cell generation, as well as enhances the helper function of Tfh for B cells, and also promotes the differentiation and maturation of DCs^[1][2].
The interaction between OX40 Ligand with OX40 is essential for the generation of antigen-specific memory T cells, and induces host antitumor immunity^[3]. But the over-upregulation of OX40 and OX40L may induce abnormal activation of Tfh cells and excessive production of autoantibodies, which leads to autoimmune disease^[1].

OX40 increases expression of RANTES protein in HUVECs^[4].

1.2 µg/mL (100 µL/well) of immoblized recombinant human OX40/TNFRSF4-His can bind human Biotin-OX40L-His with a linear range of 1-20 ng/mL.
2.Immobilized Mouse OX40L-His at 10μg/mL (100 μl/well) can bind Human OX40-6His*: Biotinylated by NHS-biotin prior to testing The ED₅₀ of Recombinant Human OX40-6His is ≤9 μg/mL.

Human

HEK293

C-His

P43489 (L29-A216)

7293  [NCBI]

LHCVGDTYPSNDRCCHECRPGNGMVSRCSRSQNTVCRPCGPGFYNDVVSSKPCKPCTWCNLRSGSERKQLCTATQDTVCRCRAGTQPLDSYKPGVDCAPCPPGHFSPGDNQACKPWTNCTLAGKHTLQPASNSSDAICEDRDPPATQPQETQGPPARPITVQPTEAWPRTSQGPSTRPVEVPGGRAVAHHHHHH

38-45 kDa

Greater than 95% as determined by reducing SDS-PAGE.

Lyophilized powder.

Lyophilized after extensive dialysis against PBS, 5% trehalose and mannitol or PBS, pH 7.4.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.

• [1]. Kaur D, et al. OX40/OX40 ligand interactions in T-cell regulation and asthma. Chest. 2012 Feb;141(2):494-499.  [Content Brief]

  [2]. TNFRSF4 TNF receptor superfamily member 4 [ Homo sapiens (human) ]

  [3]. Fu N, et al. The OX40/OX40L Axis Regulates T Follicular Helper Cell Differentiation: Implications for Autoimmune Diseases. Front Immunol. 2021 Jun 21;12:670637.  [Content Brief]

  [4]. Buglio D, et al. HDAC11 plays an essential role in regulating OX40 ligand expression in Hodgkin lymphoma. Blood. 2011 Mar 10;117(10):2910-7.  [Content Brief]

  [5]. Kotani A, et al. Signaling of gp34 (OX40 ligand) induces vascular endothelial cells to produce a CC chemokine RANTES/CCL5. Immunol Lett. 2002 Oct 21;84(1):1-7.  [Content Brief]