1. 重组蛋白
  2. Cytokines and Growth Factors
  3. Interferon & Receptors
  4. IFN-alpha
  5. IFN-alpha 1

IFN-alpha 1  (干扰素 α1)

干扰素 α1 (IFNA1;IFN-α1)属于 α/β 干扰素家族,由巨噬细胞产生,具有抗病毒活性[1]。干扰素 (IFN) 最初被认为是一种 “干扰” 体外病毒复制的物质。IFN-α/β 及其相关分子被分为 I 型 IFN,其他两类分别为 II 型 IFN (IFN-γ) 和 III 型 IFN (IFN-λ)[2].
IFNs 与三种类型特异性受体中的一种结合,导致 JAK1 和 TYK2 的激活[3]。该信号转导导致 STAT1 和 STAT2 的磷酸化,并最终与 IFN 调节因子 9 (IRF9) 结合,形成 IFN 刺激基因因子 3 (ISGF3) 复合体。随后,ISGF3 复合体诱导 IFN 刺激基因 (ISGs) 的转录,并对先天和适应性免疫反应产生后续的免疫调节作用[4]。I 型干扰素与免疫系统的相互作用对影响树突状细胞 (DC) 产生持久抗肿瘤反应非常重要[5]

IFN-alpha 1 (IFNA1; IFN-α1), belongs to the alpha/beta interferon family, is produced by macrophages with antiviral activities[1]. Interferon (IFN) is originally identified as a substance ‘interfering’ with viral replication in vitro. IFN-α/β and related molecules are classified as type I IFNs, as for the other two types of type II IFN (IFN-γ) and type III IFNs (IFN-λ), respectively[2].
IFNs binds to one of three type-specific receptors, which leads to the activation of JAK1 and TYK2[3]. This signal transduction results in phosphorylation of STAT1 and STAT2 and eventually in an association with IFN regulatory factor 9 (IRF9) and formation of the IFN-stimulated gene factor 3 (ISGF3) complex. Thus the ISGF3 complex induces transcription of IFN-stimulated genes (ISGs), with subsequent immunomodulatory effects on both innate and adaptive immune responses[4]. The interactions of type I IFN with the immune system is important for the generation of a durable antitumor response through its effects on dendritic cells (DC)[5].

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