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Aprotinin from bovine lung

来自牛肺的抑酶肽

公司名称: Sigma-Aldrich
产品编号: A1153
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Active Cdk5 Immunoprecipitation and Kinase Assay
Author:
Date:
2017-07-05
[Abstract]  Cdk5 activity is regulated by the amounts of two activator proteins, p35 and p39 (Tsai et al., 1994; Zheng et al., 1998; Humbert et al., 2000). The p35-Cdk5 and p39-Cdk5 complexes have differing sensitivity to salt and detergent concentrations (Hisanaga and Saito, 2003; Sato et al., 2007; Yamada et al., 2007; Asada et al., 2008). Cdk5 activation can be directly measured by immunoprecipitation of Cdk5 with its bound activator, followed by a Cdk5 kinase assay. In this protocol, buffers for cell lysis and immunoprecipitation are intended to ... [摘要]  Cdk5活性受两种激活蛋白p35和p39(Tsai et al。,1994; Zheng et al。,1998; Humbert等人)的量的调节,2000)。 p35-Cdk5和p39-Cdk5复合物对盐和洗涤剂浓度的敏感性不同(Hisanaga和Saito,2003; Sato et al。,2007; Yamada等人, 2007; Asada 等人,2008)。 Cdk5激活可以通过Cdk5与其结合的激活剂的免疫沉淀直接测量,随后进行Cdk5激酶测定。在该方案中,用于细胞裂解和免疫沉淀的缓冲液旨在保持p35-和p39-Cdk5复合物以评估总Cdk5活性。裂解细胞,并在核后上清液中测定蛋白浓度。 Cdk5在实验组之间从等量的总蛋白免疫沉淀。然后进行洗涤以除去外来蛋白质并平衡激酶缓冲液中的Cdk5-活化剂复合物。然后将Cdk5与组蛋白H1孵育,组蛋白H1是Cdk5和[γ- 32 P] ATP在体外成功建立的靶标。反应通过SDS-PAGE解析并转移到膜上,用于可视化H1磷酸化和免疫沉淀的Cdk5水平的免疫印迹。我们已经使用该测定来建立p39作为少突神经胶质谱系中Cdk5的主要活化剂。然而,该测定法适用于对裂解条件进行适当调整的其它细胞谱系或组织。
【背景】虽然Cdk5通常与神经元功能相关,但最近的工作已经证明Cdk5也可以调节少突胶质细胞祖细胞(OPC)的发育(Tang等人,1998; ...

Evaluation of Angiogenesis Inhibitors Using the HUVEC Fibrin Bead Sprouting Assay
Author:
Date:
2016-10-05
[Abstract]  Angiogenesis, the growth of new blood vessels from pre-existing vessels, is a critical process that occurs during normal development and tumor formation. Targeting tumor angiogenesis by blocking the activity of vascular endothelial growth factor (VEGF) has demonstrated some clinical benefit; nevertheless there is a great need to target additional angiogenic pathways. We have found that the human umbilical vein endothelial cell (HUVEC) fibrin bead sprouting assay (FBA) is a robust and predictive in vitro assay to evaluate the activity of angiogenesis inhibitors. Here, we describe an ... [摘要]  血管发生,来自预先存在的血管的新血管的生长是在正常发育和肿瘤形成期间发生的关键过程。通过阻断血管内皮生长因子(VEGF)的活性靶向肿瘤血管生成已经证明了一些临床益处;然而,非常需要靶向额外的血管生成途径。我们已经发现,人脐静脉内皮细胞(HUVEC)纤维蛋白珠发芽测定(FBA)是评估血管生成抑制剂的活性的稳健的和预测性的体外测定。在这里,我们描述了用于评估血管生成的生物抑制剂和关键终点的自动定量的优化的FBA方案。

[背景] 血管发生,新血管的生长从先前存在的血管,是在伤口愈合和正常发育期间发生的生理过程。血管生成是一个复杂和高度调节的过程,涉及内皮细胞增殖,分化,迁移,基质粘附和细胞间的信号的紧密协调。血管发生也严重参与肿瘤发展和转移。事实上,通过阻断血管内皮生长因子(VEGF)的活性靶向肿瘤血管生成已经证明了临床益处。由于肿瘤最终对VEGF靶向治疗产生抗性,因此非常需要靶向额外的血管生成途径。我们已经发现人脐静脉内皮细胞(HUVEC)纤维蛋白珠发芽测定(FBA)(Nakatsu等人,2007; Nakatsu和Hughes,2008; ...

Preparation of Protein-containing Extracts from Microbiota-rich Intestinal Contents
Author:
Date:
2016-09-20
[Abstract]  The contribution of microbiota in regulating multiple physiological and pathological host responses has been studied intensively in recent years. Evidence suggests that commensal microbiota can directly modulate different populations of cells of the immune system (e.g., Ivanov et al., 2008; Atarashi et al., 2011). Recently, we showed that protein extracts from gut commensal microbiota can activate retina-specific T cells, allowing these autoreactive T cells to then break through the blood-retinal barrier and trigger autoimmune uveitis in the recipient (Horai et al ... [摘要]  近年来,微生物群在调节多种生理和病理宿主反应中的贡献已被深入研究。证据表明共生微生物群可以直接调节免疫系统的不同细胞群(例如,Ivanov等人,2008; Atarashi等人 >。,2011)。最近,我们显示来自消化道共生菌群的蛋白质提取物可以激活视网膜特异性T细胞,允许这些自身反应性T细胞突破血液 - 视网膜屏障并触发受体中的自身免疫性葡萄膜炎(Horai等人。,2015)。以下方案描述了可用于各种体外和体内免疫学研究的富含肠内蛋白质的提取物的制备方法。

< strong=""> [背景] 肠道菌群代表一个复杂的微生物群落,提供各种各样的先天和适应性刺激物。它们从粪便样品中分离和纯化已经进行并且已经公开了方案(Mueller和Pan,2013; Verberkmoes等人,2009; Tanca等人,2014; Xiong等人,2015a; Xiong等人,2015b)。大多数这些协议已经开发的目的是进行蛋白质组学研究以表征微生物群。因此,尽管它们强调蛋白质产量和纯度,但是它们是耗时的并且可以包括影响蛋白质结构的蛋白质变性步骤(Verberkmoes等人,2009)或使用试剂(例如,叠氮化钠,SDS,苯酚),其与随后的基于细胞培养的测定不相容(Tanca等人,2014; Xiong等人,2015a; Xiong ...

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