CD40L/CD154/TRAP 蛋白, Canine (HEK293)

CD40L (CD154; TRAP) is a ligand to CD40/TNFRSF5, acts function by generating a costimulatory signal that up-regulates IL-4 synthesis^[1]. CD40L is specifically expressed on activated CD4+ T-lymphocytes and involves in activation of NF-κB/MAPK pathway^[2][3]. CD40L also involves in B cell differentiation, maturation, and apoptosis^[4]. CD40L in Canine, cleaved into 2 chains of membrane form (1-260 a.a.) and soluble form (112-260 a.a.) which serves as a ligand for integrins (ITGA5:ITGB1 and ITGAV:ITGB3). CD40L/CD154/TRAP Protein, Canine (HEK293) has a total length of 149 amino acids (M112-L260), is expressed in HEK392 cells with tag free.

CD40 配体（CD40L；CD154；TRAP）属于肿瘤坏死因子 (TNF) 家族，是 CD40/TNFRSF5 的配体，特异性表达于活化的 CD4+ T 淋巴细胞^[1]。
CD40L 是 B 细胞上的一种 II 型跨膜蛋白，可触发 B 细胞分化、成熟和凋亡的重要信号^[4]。
CD40L 通过与 T 细胞交联来发挥作用产生共刺激信号，从而与 TCR/CD3 连接和 CD28 共刺激一起增强 IL4 和 IL10 的产生，并促进干扰素-γ 和 TNF-α^[1] 的产生^[4]。
CD40L 与抗原呈递细胞 (APC) 上的 CD40 结合，通过刺激 I-κB 激酶 (IKK) 激活 TNFR 相关因子 2 和 IKK2 依赖性通路，增加 NF-κB DNA 结合和 p65 核转位。I-κB 激酶的激活导致 c-Jun N 末端激酶强烈激活以及 GST-I-κB 和 GST-p65 磷酸化^[2]。
CD40L 参与 MAPK强烈抑制 Bcl-6 的途径，诱导 Erk1/2、p38 和 Jnk1/2 磷酸化，并激活 NF-κB^[3] 介导的 IRF4。
CD40L 还结合并发出信号通过几个整合素，包括 αvβ3 和 α5β1，它们与 CD40L 的三聚体界面结合。CD40L 在免疫反应中发挥重要作用，是炎症的主要靶点^[5]。

Canine

HEK293

Tag Free

O97626 (N-G&P, M112-L260)

403468  [NCBI]

Approximately 19 kDa

Greater than 95% as determined by reducing SDS-PAGE

无菌粉末.

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween 80 are added as protectants before lyophilization.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O.

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]. Blotta MH, et al. Cross-linking of the CD40 ligand on human CD4+ T lymphocytes generates a costimulatory signal that up-regulates IL-4 synthesis. J Immunol. 1996 May 1;156(9):3133-40.  [Content Brief]

  [2]. Schwabe RF, et al. CD40 activates NF-kappa B and c-Jun N-terminal kinase and enhances chemokine secretion on activated human hepatic stellate cells. J Immunol. 2001 Jun 1;166(11):6812-9.  [Content Brief]

  [3]. Batlle A, et al. CD40 and B-cell receptor signalling induce MAPK family members that can either induce or repress Bcl-6 expression. Mol Immunol. 2009 May;46(8-9):1727-35.  [Content Brief]

  [4]. Mikolajczak SA, et al. The modulation of CD40 ligand signaling by transmembrane CD28 splice variant in human T cells. J Exp Med. 2004 Apr 5;199(7):1025-31.  [Content Brief]

  [5]. Takada YK, et al. Soluble CD40L activates soluble and cell-surface integrin αvβ3, α5β1, and α4β1 by binding to the allosteric ligand-binding site (site 2). J Biol Chem. 2021 Jan-Jun;296:100399.  [Content Brief]