细胞培养蛋白 | Recombinant Human TGFβ1
TGF-β1 受体结构及信号通路
转化生长因子-β (Transforming Growth Factor-β,TGF-β)属一类结构相关蛋白的异二聚体多肽,是由许多具有相同生物学性质的细胞信号分子构成的大家族。TGF-β信号的转导依赖细胞膜上的 I型和 II型受体,受体配体结合后由 Smad 蛋白通路介导。TGF-β与I型受体结合,诱导Smad2 Smad3磷酸化,TGF-β受体与配体结合后至少3-4小时内保持活性,磷酸化的Smad2 Smad3绑定到Smad4,形成复合形式,进入细胞核调节目标基因转录;另外,Smad7 与R-Smads绑定, 它们与 I型受体结合,可干扰TGF-β/smad的磷酸化阻止Smad复合物进入细胞核,以发挥其负性调节作用。
TGF-β1的生物学功能
TGF-β的生物学功能研究主要在炎症、组织修复和胚胎发育等方面,TGF-β1在调节发育、组织稳态和再生过程中尤为重要,是肿瘤发生、纤维化疾病、免疫功能障碍和各种先天性疾病的主要参与者。而最受关注的是其在肿瘤发展过程中的调控作用。TGFβ1在癌症中作用十分复杂,根据癌症的阶段表现出抑制或促进的双重作用。
TGF-β能够促进成纤维细胞、成骨细胞和雪旺氏细胞的生长,能使正常的成纤维细胞的表型发生转化,即在皮生长因子(EGF)同时存在的条件下,改变成纤维细胞贴壁生长特性而获得在琼脂中生长的能力,并失去生长中密度信赖的抑制作用。另一方面它们能促进细胞外基质(ECM)如胶原蛋白、纤粘连蛋白的表达和抑制ECM的降解,对细胞的形态发生、增殖和分化过程起着重要作用,有利于胚胎发育和细胞修复。动物体内实验表明,局部注射TGF-β可以促进伤口愈合和典型肉芽组织形成。众多细胞表面都有TGF-β受体,因此TGF-β家族广泛参与机体的损伤修复及组织形成过程。
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Expression System : CHO -
Purity : ≥95%, by SDS-PAGE -
Endotoxin : ≤10 EU/mg by the LAL method
Measured in a cell inhibitionn assay using TF-1 cells at IL4 presence.The ED50 for this effect is ≤0.1 ng/mL. The activity of Recombinant Human TGF-β1 (Cat. No. Y04201) was higher than other competing products.
Highly consistent bioactivity between different production batches of Recombinant Human TGF-β1 (Cat. No. Y04201).
干细胞培养、肿瘤细胞培养、培养基添加、类器官培养…
东抗生物TGF-β家族产品
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