{{'Search' | translate}}
 

Brefeldin A

Brefeldin A

公司名称: Sigma-Aldrich
产品编号: B7651
Bio-protocol()
Company-protocol()
Other protocol()

Immunophenotyping and Intracellular Staining of Fixed Whole Blood for Mass Cytometry (CyTOF)
Author:
Date:
2020-09-05
[Abstract]  In this report, we present the implementation of mass cytometry for intracellular staining using fixed whole blood. In our assay described here, 250 µl of whole blood, is stimulated in vitro with PMA/ionomycin (or left unstimulated), in the presence of secretion inhibitors (brefeldin A and monensin), lysed-fixed using SMART TUBE buffers, barcoded (optional), surface stained, fixed, stained for intracellular markers, fixed and DNA stained. Using 250 µl of whole blood from a healthy donor, we show that the expression of major lineage populations such as T cells, B cells, NK cells and ... [摘要]  [摘要] 在本报告中,我们介绍了使用固定全血在细胞内染色中进行细胞计数的方法。在此处所述的测定中,在存在分泌抑制剂(布雷菲德菌素A和莫能菌素)的情况下,用PMA /离子霉素体外刺激(或不刺激)250 µl全血,使用SMART TUBE缓冲液裂解固定,加条形码(可选) ),表面染色,固定,细胞内标记物染色,固定和DNA染色。使用250微升的全血从健康供体中,我们表明,主要的谱系种群,例如T细胞,B细胞,NK细胞和单核细胞,以及细胞因子,例如CD4的表达+ 和CD8 + IFN γ 和TNF α 多个批次(n = 27)之间的一致性是一致的,变异系数(CV)≤21 %,这意味着最小的变异性。对于每种主要细胞类型,该百分比报告为单峰百分比。据报道,响应刺激的细胞因子表达的百分比为直接亲代细胞类型的百分比。该方案具有许多好处:从生物学的角度来看,它可以应用于临床研究,尤其是在抽血量有限的情况下。从技术上讲,该协议可适用于条形码,这增加了更均匀的样品染色以及抗体保守性的好处,特别是对于大型研究人群。最后,对于包括当前全球COVID-19大流行在内的涉及传染病的研究,该方案​​允许在处理和染色之前固定传染性样品,从而降低了生物安全风险。

[背景 ] ...

Mouse BMDC-dependent T Cell Polarization Assays
Author:
Date:
2016-02-05
[Abstract]  In response to exposure to antigen, T cells whose T cell receptor (TCR) are capable of recognizing the self MHC-antigen derived peptide complex, respond to the antigen and differentiate into one of several subsets, namely TH1, TH2, TH17, Treg, etc. characterized by the signature cytokine they secrete, namely IFN-γ, IL-4, IL-17 or IL-10, respectively, referred to as syngeneic polarization as the MHC presenting the foreign antigen/epitope is self-derived.

T cell responses following incubation for defined periods, usually 3 days for mouse splenocytes, are routinely measured ...
[摘要]  响应于暴露于抗原,其T细胞受体(TCR)能够识别自身MHC抗原衍生的肽复合物的T细胞应答抗原,并分化为几个亚类之一,即TH1,TH2,TH17,Treg, 等。其特征在于它们分泌的特征性细胞因子,即IFN-γ,IL-4,IL-17或IL-10,分别称为同基因极化,因为呈递外源抗原/表位的MHC是自身衍生的。通常通过测量掺入分裂T细胞的基因组DNA中的放射性标记的前体胸腺嘧啶,通过评估抗原刺激的T细胞增殖来常规测量对于确定的时间段(通常为小鼠脾细胞3天)孵育后的T细胞应答;通过使用培养上清液的ELISA或通过细胞内细胞因子染色随后通过流式细胞术测量由增殖或非增殖应答性T细胞产生的细胞因子来评估极化方向。在下面详述的方案中,我们描述使用的同源小鼠骨髓源性树突状细胞(BMDC)作为APC刺激脾源性T细胞。通过将放射性标记的前体胸苷掺入基因组DNA中来测量T细胞的增殖反应,并通过在72小时期间测量它们分泌的细胞因子即IFN-γ,IL-4和IL-17来评估其极化方向使用ELISA。此外,我们在细胞内细胞因子染色后使用流式细胞术检测CD3 + /CD4 + /CD25低人群中的IL-17阳性T细胞。使用牛分枝杆菌(Mycobacterium bovis) - Bacille Calmette ...

A Bioimaging Pipeline to Show Membrane Trafficking Regulators Localized to the Golgi Apparatus and Other Organelles in Plant Cells
Author:
Date:
2015-09-05
[Abstract]  The plant Golgi apparatus is composed of numerous stacks of cisterna, designated as cis, medial, and trans Golgi cisternae; these stacks move within the cytoplasm along the actin cytoskeleton. Cis cisternae receive secretory products from endoplasmic reticulum (ER) and they subsequently progress through the stack to the trans cisternae, where they are sorted to other destinations, including cell wall, plasma membrane (PM), vacuoles, and chloroplasts. In addition, the plant Golgi apparatus plays a role of glycosylating proteins as well as ... [摘要]  植物高尔基体包括许多叠状体,称为顺,内侧和反式高尔基这些堆栈在细胞质内沿着肌动蛋白细胞骨架移动。 Ctern 池从内质网(ER)接收分泌产物,并且随后通过堆叠进入反转池,在那里它们被分选到其他目的地,包括细胞壁,血浆膜(PM),液泡和叶绿体。此外,植物高尔基体起到糖基化蛋白质以及合成细胞壁多糖如半纤维素和果胶的作用。该协议描述了使用共聚焦激光显微镜(CLSM),全内反射荧光显微镜(TIRF)和高压的免疫金标记标记定位于拟南芥幼苗的植物高尔基体的荧光标记的蛋白质的程序冷冻/冷冻取代的样品通过透射电子显微镜(TEM)。我们特别关注长期时间推移成像和蛋白质本地化在高尔基内的子域。该方案还可以用于其他细胞器,组织和植物物种。

产品评论