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Sheath fluid

鞘液

Company: BD
Catalog#: 342003
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Isolation and Establishment of Mesenchymal Stem Cells from Wharton’s Jelly of Human Umbilical Cord
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Date:
2018-02-20
[Abstract]  Mesenchymal stem cells (MSCs) are currently considered as ‘medicinal signaling cells’ and a promising resource in regard to cell-based regenerative therapy. Umbilical cord is a human term perinatal tissue which is easily attainable, and a promising source of stem cells with no associated ethical concerns. MSCs have been isolated from different regions of the umbilical cord and Wharton’s jelly (WJ) is the gelatinous matrix that surrounds and provides protection to the umbilical cord blood vessels. Being more primitive, MSCs from human umbilical cord exhibit greater proliferative capacity and immunosuppressive ability as compared to adult stem cells which gives them a therapeutic advantage. To meet the requirements for cell therapy, it is important to generate MSCs at a clinical scale by ... [摘要]  间充质干细胞(mesenchymal stem cells,MSCs)目前被认为是“医药信号传导细胞”,在基于细胞的再生治疗方面是一种很有前景的资源。脐带是人类的围产期组织,很容易实现,是一种有前途的干细胞来源,没有相关的伦理问题。 MSC已经从脐带的不同区域分离出来,而Wharton's果冻(WJ)是包围并提供对脐带血管的保护的凝胶状基质。更原始的是,与成人干细胞相比,来自人脐带的MSC表现出更大的增殖能力和免疫抑制能力,这使其具有治疗优势。为了满足细胞疗法的要求,通过遵循不耗时或劳动强度的步骤来产生临床规模的MSC是重要的。在此我们提出了一种简单,高效的方法,通过外植体培养方法从人脐带WJ中分离出MSC,这种方法具有重现性和成本效益。

【背景】间充质干细胞(MSC)具有显着的临床潜力来治疗各种衰弱性疾病,主要是由于其独特的免疫调节作用和再生能力(Caplan and Sorrell,2015)。它们存在于许多组织中(Hass et al。,2011),并被观察到是血管周围的体内(Caplan和Correa,2011)。来源或来源本身的小生境可能导致各种MSC类型之间的重要功能差异(Kwon等人,2016年)。虽然骨髓是研究得最充分和最好的MSCs来源,但也有一定的局限性(Liu et al。,2016)。 ...

Quantification of Bacterial Polyhydroxybutyrate Content by Flow Cytometry
Author:
Date:
2017-12-05
[Abstract]  We describe here a detailed protocol for the quantification of the intracellular content of polyhydroxybutyrate (PHB) in a population of bacterial cells by flow cytometry, which is based on a consensus of several previously reported works. [摘要]  我们在这里描述了通过流式细胞术定量细菌细胞群中的聚羟基丁酸酯(PHB)的细胞内含量的详细方案,其基于几个先前报道的作品的共识。

【背景】在营养物质耗尽和存在可利用的碳源的情况下,可以使用几种细菌(例如,Cupriavidus necator,中华根瘤菌Sinorhizobium meliloti, >假单胞菌(Pseudomonas)开启了聚羟基丁酸酯(PHB)中性聚合物的积累,用于储存碳和还原能力(Jendrossek和Pfeiffer,2014)。定量细菌PHB含量的经典方法基于其初始解聚,随后通过紫外分光光度法或气相色谱定量检测β-羟基丁酸的特定化学衍生物(Law and Slepecky,1961; Braunegg等人, 1978)。最近,荧光染料尼罗红(9-二乙氨基-5H-苯并[α]吩恶嗪-5-酮)(Greenspan和Fowler,1985)将PHB颗粒染色(Müller等人,1993)导致了开发新的快速荧光方法来定量细菌样品中聚合物的含量。随后,将基于尼罗红的PHB染色与流式细胞术偶联使得可以定量细菌群体内单细胞水平的聚合物含量(Gorenflo等人,1999; Kacmar等人2006; Tyo等人,2006; Alves等人,2017; Lagares Jr.等人,, ...

Structured Illumination Microscopy (SIM) and Photoactivated Localization Microscopy (PALM) to Analyze the Abundance and Distribution of RNA Polymerase II Molecules on Flow-sorted Arabidopsis Nuclei
Author:
Date:
2016-02-05
[Abstract]  RNA polymerase II (RNAPII) is the enzyme transcribing most of the eukaryotic protein-coding genes. Analysing the distribution and quantification of RNAPII can help understanding its function in interphase nuclei. Although several investigations in mammals indicate the organization of RNAPII in so-called ‘transcription factories’ (Jackson et al., 1993; Rieder et al., 2012; Papantonis and Cook, 2013), their existence is still controversially discussed (Zhao et al., 2014).

Recently, based on super-resolution microscopy the presence of transcription factories was also suggested in plants. Applying structured illumination microscopy (SIM) and photoactivated localization microscopy (PALM) the distribution and number of RNAPII molecules in Arabidopsis ...
[摘要]  RNA聚合酶II(RNAPII)是转录大多数真核蛋白编码基因的酶。分析RNAPII的分布和定量可以帮助理解其在间期核中的功能。虽然哺乳动物中的几个研究表明RNAPII在所谓的"转录工厂"中的组织(Jackson等人,1993; Rieder等人,2012; Papantonis和Cook ,2013),但是它们的存在仍然存在争议(Zhao等人,2014)。
近来,基于超分辨率显微镜,在植物中也提出了转录工厂的存在。应用结构化照明显微镜(SIM)和光活化定位显微镜(PALM),分析拟南芥核中的RNAPII分子的分布和数目,并且发现RNAPII丰度和内源多倍体之间的正相关性(Schubert,2014; Schubert和Weisshart,2015)。
这里,我们提出了描述根据它们的内源多倍体水平通过流式分选分离拟南芥间期核的方案,随后是使用特异性抗体的双重免疫染色不同的RNAPII修饰,随后通过空间SIM和PALM评估以获得关于单一无活性和活性RNAPII分子的丰度,分布和共定位的结果。

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