CD70 蛋白, Human (HEK293, Fc)

CD70 is the ligand of CD27 in activated T and B lymphocytes, is an important cytokine in CD70-CD27 pathway involving with the generation and maintenance of T cell immunity^[1]. CD70 is a surface antigen, also shows antiviral activity and regulates viability of tumor cells and regulatory T cells^[2][3]. As for CD70 protein in human contains transmembrane domain and transmembrane helix, belonging to the tumor necrosis factor (TNF) family. CD70 Protein, Human (HEK293, Fc) is 149 amino acids in length (Q45-P193) and is expressed in the HEK293 cells with C terminal hFc-tag.

CD70 (CD27 Ligand)属于肿瘤坏死因子(TNF)家族，是TNFRSF27/CD27^[1]的配体。
CD70和CD27是II型同源三聚体和I型同源二聚体跨膜糖蛋白，分别在激活的 T 淋巴细胞和静息的 T 淋巴细胞和 B 淋巴细胞上表达^[3][4]。至于CD70在动物疾病模型中的广泛应用，人类的氨基酸序列与小鼠（56.25%）和大鼠（55.79%）有很大不同。
CD70是动物中最常见的突变基因之一。一系列弥漫性大 B 细胞淋巴瘤，特别是在关键的 Epstein-Barr 病毒 (EBV) 特异性 T 细胞免疫中发挥作用，更普遍的是在 B 细胞的免疫监视中发挥作用。CD70 通过恢复由 CD70 缺陷的 EBV 感染 B 细胞刺激的 EBV 特异性 T 淋巴细胞的扩增来抑制 EBV 感染^[3]。
CD70 参与先天性和适应性免疫的激活，在成熟树突状细胞中表达，并在 CD40 或 Toll 样受体的触发下上调^[2]。
CD70 诱导共刺激 T 细胞增殖，增强溶细胞 T 细胞的生成细胞，并有助于 T 细胞激活^[4]。
据报道，CD70 在调节 B 细胞激活、自然杀伤细胞的细胞毒功能和免疫球蛋白合成中发挥作用^[5]。使用 CAR-T 细胞靶向 CD70 阳性肿瘤可诱导有效的抗肿瘤反应^[6]。

Human

HEK293

C-hFc

P32970 (Q45-P193)

970  [NCBI]

QQQLPLESLGWDVAELQLNHTGPQQDPRLYWQGGPALGRSFLHGPELDKGQLRIHRDGIYMVHIQVTLAICSSTTASRHHPTTLAVGICSPASRSISLLRLSFHQGCTIASQRLTPLARGDTLCTNLTGTLLPSRNTDETFFGVQWVRP

Approximately 52 kDa

Greater than 90% as determined by reducing SDS-PAGE.

无菌粉末.

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]. Bowman MR, et al. The cloning of CD70 and its identification as the ligand for CD27. J Immunol. 1994 Feb 15;152(4):1756-61.  [Content Brief]

  [2]. Jacobs J, et al. CD70: An emerging target in cancer immunotherapy. Pharmacol Ther. 2015 Nov;155:1-10.  [Content Brief]

  [3]. Izawa K, et al. Inherited CD70 deficiency in humans reveals a critical role for the CD70-CD27 pathway in immunity to Epstein-Barr virus infection. J Exp Med. 2017 Jan;214(1):73-89.  [Content Brief]

  [4]. Brown GR, et al. CD27-CD27 ligand/CD70 interactions enhance alloantigen-induced proliferation and cytolytic activity in CD8+ T lymphocytes. J Immunol. 1995 Apr 15;154(8):3686-95.  [Content Brief]

  [5]. Kobata T, et al. CD27-CD70 interactions regulate B-cell activation by T cells. Proc Natl Acad Sci U S A. 1995 Nov 21;92(24):11249-53.  [Content Brief]

  [6]. Jin L, et al. CD70, a novel target of CAR T-cell therapy for gliomas. Neuro Oncol. 2018 Jan 10;20(1):55-65.  [Content Brief]

  [7]. Boursalian TE, et al. Targeting CD70 for human therapeutic use. Adv Exp Med Biol. 2009;647:108-19.  [Content Brief]

  [8]. Cormary C, et al. Induction of T-cell antitumor immunity and protection against tumor growth by secretion of soluble human CD70 molecules. Cancer Gene Ther. 2004 Jul;11(7):497-507.  [Content Brief]