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Nonfat dried milk powder

脱脂奶粉

公司名称: AppliChem
产品编号: A0830
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TGFβ Stimulation Assay
Author:
Date:
2014-12-05
[Abstract]  TGFβ is part of a growth factor superfamily which modulates cell growth, differentiation, adhesion, migration, ECM synthesis and apoptosis (Massague, 1998; Siegel and Massague, 2003). Free TGFβ binds to its high affinity TGFβ receptor, a receptor serine/threonine kinase, inducing phosphorylation of Smad2/3 which subsequently forms a complex with Smad4 to translocate to the nucleus where it interacts with multiple co-activators and repressors generating distinct transcriptional responses.

Indeed, TGFβ signaling shows a remarkable cellular context dependency and apparent ...
[摘要]  TGFβ是调节细胞生长,分化,粘附,迁移,ECM合成和凋亡的生长因子超家族的一部分(Massague,1998; Siegel和Massague,2003)。游离TGFβ结合到其高亲和力TGFβ受体,一种受体丝氨酸/苏氨酸激酶,诱导Smad2/3的磷酸化,随后与Smad4形成复合物转移到细胞核,其中它与多种共激活剂和阻遏物相互作用产生不同的转录反应。实际上,TGFβ信号传导显示出显着的细胞环境依赖性和表观多功能性:例如TGFβ能够抑制许多上皮细胞中的细胞增殖,但也可以增强成纤维细胞中的增殖和内皮细胞中的细胞生长(Guasch等人,2007; Xiao等人,2012年);它增强干细胞多能性,但促进其他细胞的分化(Park,2011);在癌症发展中,它抑制恶变前细胞增殖,但同时促进转移到转移表型(Chaudhury和Howe,2009)。
TGFβ刺激测定监测细胞对TGFβ的反应性。在TGFβ刺激时,可以分析短期效应例如Smad2磷酸化和长期效应例如细胞增殖。将描述用于小鼠角质形成细胞的测定,其中TGFβ强烈抑制细胞增殖,但是这两种测定也适用于其它细胞类型。

Cell Surface Protein Biotinylation and Analysis
Author:
Date:
2013-08-20
[Abstract]  A great way to specifically isolate and quantify proteins in the cell surface membrane is to take advantage of the biotinylation technique. It consists of labeling cell surface proteins with a biotin reagent before lysing the cells, and isolating these tagged proteins by NeutrAvidin pull-down. Then, the samples are subjected to SDS-PAGE separation, transferred to PVDF membranes and probed with specific antibodies. Quantification of cell surface expression is accomplished by densitometric measurement of the bands corresponding to the protein of interest and subsequent normalization by a ... [摘要]  特异性分离和定量细胞表面膜中的蛋白质的好方法是利用生物素化技术。 它包括在裂解细胞之前用生物素试剂标记细胞表面蛋白,并通过NeutrAvidin下拉分离这些标记的蛋白。 然后,将样品进行SDS-PAGE分离,转移至PVDF膜并用特异性抗体探测。 细胞表面表达的定量通过密度测量对应于感兴趣的蛋白质的条带并随后通过膜蛋白质(作为对照)标准化来完成。

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