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OctoMACS Separator

OctoMACSTM Separator and Starting Kits

Company: Miltenyi Biotec
Catalog#: 130-042-109
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Multiplex T-cell Stimulation Assay Utilizing a T-cell Activation Reporter-based Detection System
Author:
Date:
2021-01-20
[Abstract]  

Immune tolerance and response are both largely driven by the interactions between the major histocompatibility complex (MHC) expressed by antigen presenting cells (APCs), T-cell receptors (TCRs) on T-cells, and their cognate antigens. Disordered interactions cause the pathogenesis of autoimmune diseases such as type 1 diabetes. Therefore, the identification of antigenic epitopes of autoreactive T-cells leads to important advances in therapeutics and biomarkers. Next-generation sequencing methods allow for the rapid identification of thousands of TCR clonotypes from single T-cells, and thus there is a need to determine cognate antigens for identified TCRs. This protocol describes a reporter system of T-cell activation where the fluorescent reporter protein ZsGreen-1 is driven by nuclear

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[摘要]  [摘要] 免疫耐受和应答都很大程度上由抗原呈递细胞(APC)表达的主要组织相容性复合物(MHC),T细胞上的T细胞受体(TCR)及其同源抗原之间的相互作用驱动。相互作用障碍导致自身免疫性疾病(例如1型糖尿病)的发病机理。因此,鉴定自身反应性T细胞的抗原表位导致治疗和生物标志物的重要进展。下一代测序方法可从单个T细胞快速鉴定数千种TCR克隆型,因此需要确定已鉴定TCR的同源抗原。该协议描述了T细胞活化的报告系统,其中荧光报告蛋白ZsGreen-1由活化T细胞的核因子(NFAT)信号驱动并通过流式细胞仪读取。记者T细胞也组成性表达额外的一对荧光素tein作为识别物,允许同时多路复用多达8种不同的报告T细胞系,每种表达不同的目标TCR,可通过流式细胞仪区分。一旦制成TCR表达细胞系,仅需一个转导步骤即可将其无限期用于制备新的T细胞系。这种多路复用系统允许筛选TCR-抗原相互作用的数量,否则这些相互作用将是不切实际的,可在多种情况下使用(即,筛选单个抗原或抗原库),并可用于研究任何T细胞-MHC-抗原三分子相互作用。

[背景] T细胞,抗原呈递细胞(APC)及其同源抗原之间的相互作用是自身免疫性疾病(例如1型糖尿病)的主要事件(Michels等,2017; ...

Isolation of THY1+ Undifferentiated Spermatogonia from Mouse Postnatal Testes Using Magnetic-activated Cell Sorting (MACS)
Author:
Date:
2016-12-20
[Abstract]  In mammals, homeostasis of many tissues rely on a subpopulation of cells, referred to as stem cells, to sustain an appropriate number of undifferentiated and differentiated cells. Spermatogonial stem cells (SSCs) provide the fundamental cellular source for spermatogenesis and are responsible for the lifelong maintenance of the germline pool in testes throughout the reproductive lifespan of males. To gain insight into germline stem cell biology and develop strategies for infertility treatment, several germ cell isolation methods have been reported in order to acquire good quality and quantity of undifferentiated spermatogonia. Among them, magnetic-activated cell sorting (MACS) is an efficient cell isolation method that requires less time and less initial cell numbers to obtain an enriched ... [摘要]  在哺乳动物中,许多组织的体内平衡依赖于称为干细胞的细胞亚群,以维持适量的未分化细胞和分化细胞。精原细胞干细胞(SSC)为精子发生提供了基本的细胞来源,并且负责终生维持雄性生殖期间睾丸中的种系池。为了获得对种系干细胞生物学的了解并制定不孕症治疗策略,已经报道了几种生殖细胞分离方法,以获得良好质量和数量的未分化精原细胞。其中,磁激活细胞分选(MACS)是一种有效的细胞分离方法,其需要较少的时间和较少的初始细胞数以使用抗原 - 抗体反应来获得富集的细胞群体。胸腺细胞抗原1(THY1,CD90.2)被认为是小鼠新生儿和成年睾丸中未分化精原细胞的表面标志物。在这里,我们描述了一个用于分离来自小鼠睾丸的一周龄THY1 + 细胞和四周龄THY1 + 细胞的方案。分离过程包括三个步骤:睾丸收集和单细胞悬浮,使用生物素缀合的抗THY1抗体的细胞标记和磁性细胞分离。注意,这种隔离方案应在五小时内完成,以最大限度地提高活细胞的质量和数量。

背景 在几个成人组织中观察到活性和静止干细胞的共存。静止,自我更新和分化之间的充分平衡对于维持适当数量的未分化干细胞是必要的,并且避免过早的干细胞耗尽许多组织的体内平衡(Tseng等人,2015; Wabik和Jones,2015; ...

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