产品详情介绍
CD4又称T细胞表面抗原T4/Leu-3(T-cell surface antigen T4/Leu-3),是一个51 kDa的跨膜糖蛋白,分布于辅助性T细胞,巨噬细胞、树突细胞或 NK细胞等细胞表面,在T细胞发育及激活过程中起到重要作用[1-4]。CD4是T细胞受体(T cell receptor,TCR)的共受体,与MHC Ⅱ类分子相结合,稳定TCR与抗原肽-MHC复合物的结合。在辅助性T细胞中,招募淋巴细胞特异性蛋白酪氨酸激酶Lck至TCR-CD3复合物上,通过磷酸化多种底物起始不同的细胞内信号通路,参与细胞激活、迁移、释放细胞因子等[5]。在巨噬细胞或NK细胞,CD4通过非Lck依赖途径促进细胞激活和分化,释放细胞因子[2,4]。本产品为小鼠抗人CD4单克隆抗体,用于FC方法特异性检测人CD4蛋白。
CD系列产品介绍视频
[1] Isobe M, Huebner K, Maddon PJ, et al. The gene encoding the T-cell surface protein T4 is located on human chromosome 12 [J]. Proc Natl Acad Sci U S A. 1986, 83(12): 4399-402.
[2] Zhen A, Krutzik SR, Levin BR, et al. CD4 ligation on human blood monocytes triggers macrophage differentiation and enhances HIV infection [J]. J Virol. 2014, 88(17): 9934-46.
[3] Winkel K, Sotzik F, Vremec D, et al. CD4 and CD8 expression by human and mouse thymic dendritic cells [J]. Immunol Lett. 1994, 40(2): 93-9.
[4] Bernstein HB, Plasterer MC, Schiff SE, et al. CD4 Expression on Activated NK Cells: Ligation of CD4 Induces Cytokine Expression and Cell Migration [J]. The Journal of Immunology. 2006, 177(6): 3669-76.
[5] Jönsson P, Southcombe JH, Santos AM, et al. Remarkably low affinity of CD4/peptide-major histocompatibility complex class II protein interactions [J]. Proc Natl Acad Sci U S A. 2016, 113(20): 5682-7.