OX40 Ligand/TNFSF4 Protein, Rat (HEK293, Fc)

OX40 Ligand (TNFSF4) is a type II glycoprotein with a cytoplasmic tail of 23 aa and an extracellular domain of 133 aa^[1]. OX40 Ligand is a ligand for TNFRSF4 (CD134), belongs to tumor necrosis factor (TNF) family. 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]. OX40 Ligand/TNFSF4 Protein, Rat (HEK293, Fc) is a recombinant rat OX40 Ligand (V20-P210) with C-terminal hFc tag, which is produced in HEK293.

OX40 Ligand (TNFSF4) is a type II glycoprotein with a cytoplasmic tail of 23 aa and an extracellular domain of 133 aa^[1]. OX40 Ligand is expressed on antigen-presenting cells, such as B cells, dendritic cells (DCs), and macrophages, and airway smooth muscle cells^[3]. OX40 Ligand is a ligand for TNFRSF4 (CD134), belongs to tumor necrosis factor (TNF) family.
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].
Mouse OX40 Ligand shares 81.31% aa sequence identity with rat, and shares <70% aa sequence identity with human.
The interaction between OX40 Ligand with OX40 is essential for the generation of antigen-specific memory T cells, and induces host antitumor immunity^[4]. OX40-OX40 Ligand signal transduction is essential in atopic asthma regulated by memory Th2 cells^[5].

OX4 Ligand (mouse, 1, 2 ng/mL) increases proliferation of CD4+ T cells isolated from mouse spleen^[6].

OX4 Ligand (mouse, 1 µg/kg, i.v.) exhibits higher eosinophil infiltration compared with control mice treated only with OVA in a Ovalbumin (OVA)‑induced asthma mouse model^[6].

Measured by its binding ability in a functional ELISA. When Recombinant Human OX40 is present at 2 μg/mL, can bind Recombinant Rat OX40 Ligand. The ED₅₀ for this effect is 324.6 ng/mL.

Rat

HEK293

C-hFc

P15725 (V20-P210)

25572  [NCBI]

VTVKLNCVKDTYPSGHKCCRECQPGHGMVSRCDHTRDTVCHPCEPGFYNEAVNYDTCKQCTQCNHRSGSELKQNCTPTEDTVCQCRPGTQPRQDSSHKLGVDCVPCPPGHFSPGSNQACKPWTNCTLSGKQIRHPASNSLDTVCEDRSLLATLLWETQRTTFRPTTVPSTTVWPRTSQLPSTPTLVAPEGP

Approximately 65-75 kDa

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

Lyophilized powder

Lyophilized from a 0.2 μm filtered solution of 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]. 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]

  [3]. Croft M, et al. The significance of OX40 and OX40L to T-cell biology and immune disease. Immunol Rev. 2009 May;229(1):173-91.  [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]. Qiao J, et al. TSLP from RSV-stimulated rat airway epithelial cells activates myeloid dendritic cells. Immunol Cell Biol. 2011 Feb;89(2):231-8.  [Content Brief]

  [6]. Lei W, et al. Crucial role of OX40/OX40L signaling in a murine model of asthma. Mol Med Rep. 2018 Mar;17(3):4213-4220.  [Content Brief]