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Falcon® Round-Bottom Tubes, 5 ml

Falcon ® 5mL圆底聚苯乙烯试管,无盖

Company: Corning
Catalog#: 352008
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Isolation and Analysis of Stromal Cell Populations from Mouse Lymph Nodes
Author:
Date:
2017-08-20
[Abstract]  Our protocol describes a simple procedure for isolating stromal cells from lymph nodes (LN). LN are disrupted then enzymatically digested with collagenase and dispase to produce a single cell suspension that can be stained with fluorescently labelled antibodies and analysed by flow cytometry. This protocol will enable identification of fibroblastic reticular cells (FRC), lymphatic endothelial cells (LEC), blood endothelial cells (BEC) as PNAd+ BEC that form LN high endothelial venules (HEV). This method can be applied to examine LN stromal cell responses during inflammatory events induced by infections or immunologic adjuvants and to subset most leukocytes found in LN. [摘要]  我们的方案描述了从淋巴结(LN)分离基质细胞的简单过程。 LN被破坏,然后用胶原酶和分散酶酶消化以产生可以用荧光标记的抗体染色的单细胞悬浮液并通过流式细胞术分析。 该方案能够识别形成LN高内皮小静脉(HEV)的PNAd + BEC的成纤维细胞网状细胞(FRC),淋巴内皮细胞(LEC),血液内皮细胞(BEC)。 该方法可以用于检测由感染或免疫佐剂诱导的炎症事件期间的LN基质细胞反应,并且在LN中发现大多数白细胞。
【背景】淋巴结(LN)由间充质和内皮基质细胞的复杂网络构成。这些包括成纤维细胞网状细胞(FRCs),淋巴内皮细胞(LECs)和血液内皮细胞(BECs)。这些基质细胞组织了LN的复杂微结构,使得能够支持免疫细胞迁移,体内平衡,耐受性和细胞相互作用,以引发对病原体和肿瘤的免疫应答。我们已经表明,LN基质细胞可以响应于炎症信号而增殖和扩张,并且将免疫细胞募集到伴随感染的LN中(Gregory等,2017)。这些基质细胞也可以显着调节其转录程序以应对感染,从而支持持续的免疫应答。该方案使稳定状态和疾病期间LN的基质细胞亚群可靠地分离。这使得LN基质细胞的表型,功能,遗传或表观遗传学研究揭示了它们如何有助于组织体内平衡和免疫应答。

Qualitative and Quantitative Assay for Detection of Circulating Autoantibodies against Human Aortic Antigen
Author:
Date:
2017-07-05
[Abstract]  Increased amount of autoantibodies in human sera are the hallmark of autoimmune diseases (Wang et al., 2015). In case of known antigen, detection of autoantibodies is done using laboratory based methods. However, in most autoimmune diseases, knowledge of self-antigen is still vague. We have developed an ELISA-based quantitative assay to detect the presence of autoantibodies as well as to measure the circulating autoantibodies in the sera of patients suffering from large vessel vasculitis (LVV), an autoimmune disease (Chakravarti et al., 2015). Using this assay, we detected the increase in anti-aortic antibodies in LVV patient’s sera. We have further verified the results by independent biochemical techniques and found the specificity to be > 94% (Chakravarti et al. ... [摘要]  人血清中自身抗体量的增加是自身免疫性疾病的标志(Wang等人,2015)。 在已知抗原的情况下,使用基于实验室的方法检测自身抗体。 然而,在大多数自身免疫性疾病中,自身抗原的知识仍然是模糊的。 我们已经开发了基于ELISA的定量测定法来检测自身抗体的存在以及测量患有大血管血管炎(LVV),自身免疫疾病(Chakravarti等人)的患者的血清中的循环自身抗体, ,2015)。 使用该测定,我们检测到LVV患者血清中抗主动脉抗体的增加。 我们通过独立生物化学技术进一步验证了结果,发现特异度 94%(Chakravarti等人,2015)。 该方法可以被独特地修改以适应任何自身免疫,特别是器官特异性疾病,因此在自身抗体的检测和定量中具有更广泛的应用。
【背景】约有80-100种自身免疫性疾病,其中免疫细胞将自身蛋白识别为外源抗原,并被激活以产生体液应答。尽管大多数自​​身免疫性疾病的触发因素仍然是一个谜,患者血清中存在较高水平的抗体是非常普遍的(Wang等人,2015)。一些实例包括抗小血管血管炎中的嗜中性粒细胞胞浆抗原,多发性硬化中的髓磷脂碱性蛋白,1型糖尿病中的谷氨酸脱羧酶等。(Wang等人, ...

Cell-based Assays to Monitor AID Activity
Author:
Date:
2016-02-05
[Abstract]  The enzyme Activation induced deaminase (AID) underpins antibody affinity maturation and isotype switching through its mutagenic activity of deaminating deoxycytidine to deoxyuridine in DNA. Subsequent processing of the deoxyuridine initiates the processes of somatic hypermutation (SHM) and class switch recombination (CSR) in B cells. Structure-function analysis of AID requires sensitive and biologically relevant methods to measure its various activities. Here we describe simple but effective methods to measure 1) the ability of AID to mutate the Escherichia coli genome, which provides an indication of its catalytic activity; 2) the capacity of AID to perform SHM by complementing a derivative of the DT40 chicken B cell line; 3) the ability of AID to perform CSR by complementing ... [摘要]  酶活化诱导的脱氨酶(AID)通过其将脱氧胞苷脱氨基到DNA中的脱氧尿苷的诱变活性来支持抗体亲和力成熟和同种型转换。脱氧尿苷的后续加工引发B细胞中体细胞超突变(SHM)和类型转换重组(CSR)的过程。 AID的结构功能分析需要灵敏和生物相关的方法来测量其各种活动。在这里我们描述简单但有效的方法来测量1)AID突变大肠杆菌基因组的能力,其提供其催化活性的指示; 2)AID通过补充DT40鸡B细胞系的衍生物来进行SHM的能力; 3)AID通过补充AID缺乏的原代小鼠B细胞来进行CSR的能力。三种方法的组合,伴随着AID亚细胞定位和蛋白质表达水平和稳定性的必要分析作为对照,允许AID的详细结构功能研究。

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