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DNase I recombinant

DNase I重组

Company: Roche Diagnostics
Catalog#: 04536282001
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Mimicking Angiogenesis in vitro: Three-dimensional Co-culture of Vascular Endothelial Cells and Perivascular Cells in Collagen Type I Gels
Author:
Date:
2017-04-20
[Abstract]  Angiogenesis defines the process of formation of new vascular structures form existing blood vessels, involved during development, repair processes like wound healing but also linked to pathological changes. During angiogenic processes, endothelial cells build a vascular network and recruit perivascular cells to form mature, stable vessels. Endothelial cells and perivascular cells secret and assemble a vascular basement membrane and interact via close cell-cell contacts. To mimic these processes in vitro we have developed a versatile three-dimensional culture system where perivascular cells (PVC) are co-cultured with human umbilical cord vascular endothelial cells (HUVEC) in a collagen type I gel. This co-culture system can be used to determine biochemical and cellular processes ... [摘要]  血管发生定义了形成现有血管的新血管结构的形成过程,涉及发育过程中的修复过程,如伤口愈合,还与病理变化有关。 在血管生成过程中,内皮细胞建立血管网络并招募血管周围细胞以形成成熟稳定的血管。 内皮细胞和血管周围细胞秘密并组装血管基底膜,并通过细胞间接触进行相互作用。 为了体外模拟这些过程,我们开发了一种通用的三维培养系统,其中血管周围细胞(PVC)与胶原I型凝胶中的人脐带血管内皮细胞(HUVEC)共培养。 这种共培养系统可用于通过广泛的分析选项来确定新生血管生成事件期间的生物化学和细胞过程。
【背景】内皮细胞和血管周围细胞之间的协调相互作用对于根据给定组织内的局部需要形成稳定的血管网是非常重要的。多个分子组分有助于相互作用,但仍然很少了解。需要各种生长因子来吸引内皮细胞到低氧浓度的位点,并建立新的血管,然后被血管周围细胞覆盖。两种细胞类型相互作用以分泌特定的细胞外基质并稳定新形成的血管。在过去已经建立了多个测定法来分析二维基质胶底物上的血管细胞相互作用和血管样网络形成,但是这些测定在三维细胞内提供关于血管内血管周围细胞相互作用和血管基底膜形成的初始步骤的信息是有限的维度微环境。此外,缺乏适合于培养实验的良好表征的血管周围细胞。
我们以前分离出具有血管周围特征的细胞,因为它们表达周细胞特异性标记,产生和分泌细胞外基质蛋白并在体内刺激血管生成过程(Brachvogel等,2005和2007)。这些细胞用于与人脐静脉内皮细胞建立共培养系统,并研究三维微环境中两种细胞类型相互作用后新生血管发生的关键步骤(Pitzler等,2016; ...

Evaluation of Cross-presentation in Bone Marrow-derived Dendritic Cells in vitro and Splenic Dendritic Cells ex vivo Using Antigen-coated Beads
Author:
Date:
2016-11-20
[Abstract]  Antigen presentation by MHC class I molecules, also referred to as cross-presentation, elicits cytotoxic immune responses. In particular, dendritic cells (DC) are the most proficient cross-presenting cells, since they have developed unique means to control phagocytic and degradative pathways.

This protocol allows the evaluation of antigen cross-presentation both in vitro (by using bone marrow-derived DC) and ex vivo (by purifying CD8+ DC from spleen after incorporation of particulate antigen) using ovalbumin (OVA)-coupled particles. Cross-presentation efficiency is measured by three different readouts: the B3Z hybridoma T cell line (Karttunen et al., 1992) and stimulation of antigen-specific CD8+ T cells (OT-I) (Kurts et al ...
[摘要]  通过MHC I类分子的抗原呈递,也称为交叉呈递,引起细胞毒性免疫应答。特别地,树突细胞(DC)是最熟练的交叉呈递细胞,因为它们已经开发了控制吞噬和降解途径的独特手段。 <此协议允许在体外(通过使用骨髓衍生的DC)和离体(通过纯化CD8 + )评价抗原交叉呈递。 (OVA)偶联的颗粒后,来自脾脏的DC/DC结合颗粒抗原)。通过三种不同的读数测量交叉呈递效率:B3Z杂交瘤T细胞系(Karttunen等人,1992)和抗原特异性CD8 + T细胞的刺激OT-I)(Kurts等人,1996),在用羧基荧光素琥珀酰亚胺酯(CFSE)标记它们之后分析CD69表达或OT-I增殖的OT-I活化。通过使用这种方法,我们可以最近显示DCs能够在TLR4结合时瞬时增加交叉表达效率(Alloatti等人,2015)。 [背景] 在小鼠中,抗原呈递细胞(APC)能够吸收外源抗原以加工它们,并将源自这些外源抗原的肽加载到主要组织相容性复合体(MHC)I类分子上。肽-MHC I复合物随后被转运到质膜,在那里它们可以呈递到CD8 + T细胞,从而促进T细胞活化,这被称为交叉呈递(Joffre等人, al 。,2012)。在不同的APC中,树突状细胞(DC)在交叉呈递方面表现优异,并且包含表达XCR1标记的不同亚群,其已经显示非常有效地交叉呈递抗原(即CD8 + 来自脾的DC和来自皮肤和肺的CD103 ...

Murine Liver Myeloid Cell Isolation Protocol
Author:
Date:
2015-05-20
[Abstract]  In homeostasis, the liver is critical for the metabolism of nutrients including sugars, lipids, proteins and iron, for the clearance of toxins, and to induce immune tolerance to gut-derived antigens. These functions predispose the liver to infection by blood-borne pathogens, and to a variety of diseases ranging from toxin and medication-induced disorders (CCl4, acetaminophen) to metabolic disorders (steatohepatitis, alcoholic liver disease, biliary obstruction, cholestasis) or autoimmunity. Chronic liver injury often progresses to life threatening fibrosis and can end in liver cirrhosis and hepatocellular carcinoma (Pellicoro et al., 2014).

The liver contains parenchymal cells or hepatocytes that make up the majority of hepatic cells. It also contains ...
[摘要]  在内环境稳定中,肝脏对于营养物质(包括糖,脂质,蛋白质和铁)的代谢是关键的,用于清除毒素,并诱导对肠衍生的抗原的免疫耐受。这些功能使肝脏感染由血源性病原体引起的感染,并且导致各种疾病,从毒素和药物诱导的疾病(CC​​l 4,对乙酰氨基酚)到代谢性疾病(脂肪性肝炎,酒精性肝病,胆汁阻塞,胆汁淤积)或自身免疫。慢性肝损伤常常进展为威胁生命的纤维化,并且可以在肝硬化和肝细胞癌中结束(Pellicoro等人,2014)。
肝脏含有构成肝细胞大部分的实质细胞或肝细胞。它还含有非实质结构细胞,例如窦状内皮细胞和大量非实质的先天免疫细胞,主要是单核细胞,嗜中性粒细胞,巨噬细胞,DC,NK和NKT细胞,其在感染的情况下可触发适应性免疫应答或其他致病性侮辱(Jenne和Kubes,2013)。如何调节这种免疫应答决定了急性和慢性肝损伤的程度(Stijlemans等人,2014)。在这种情况下,肝巨噬细胞已经被证明在肝损伤中发挥中心但发散(从启动到分解)功能。(Sica等人,2014)。在过去几年中已经变得清楚的是,肝巨噬细胞由两类,组织驻留巨噬细胞,源自卵黄囊/胎儿肝祖细胞的库普弗细胞(KC)和来源于骨髓衍生的Ly6C的组织浸润巨噬细胞Hi 单核细胞(Jinhoux和Jung,2014; ...

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