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PIPETTE, 10 ML, GRADUATED 1/10 ML, STERILE

吸管

Company: Greiner Bio One International
Catalog#: 607107
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High-throughput YO-PRO-1 Uptake Assay for P2X7 Receptors Expressed in HEK Cells
Author:
Date:
2018-07-20
[Abstract]  P2X7 receptors are extracellular ATP-gated ion channels that play broad physiological and pathological roles in animals (Sluyter, 2017). Activation of P2X7 receptors lead to the opening of membrane channels permeable for small cations like Na+ and Ca2+ as well as fluorescent dyes such as YO-PRO-1 (Alves et al., 2014). Taking advantage of this dye-permeability, YO-PRO-1 uptake assays have been widely used to probe P2X7 receptor activity (Surprenant et al., 1996; Rassendren et al., 1997; Karasawa et al., 2017). Here we describe a step by step protocol for a high-throughput YO-PRO-1 uptake assay using HEK293 cells expressing P2X7 receptors. This 3-day protocol is particularly suited for examining effects of small molecules and ... [摘要]  P2X7受体是细胞外ATP门控离子通道,在动物中发挥广泛的生理和病理作用(Sluyter,2017)。 P2X7受体的激活导致膜通道的开放可渗透小阳离子如Na + 和Ca 2 + 以及荧光染料如YO-PRO-1(Alves) et al。,2014)。 利用这种染料渗透性,YO-PRO-1摄取试验已被广泛用于探测P2X7受体活性(Surprenant et al。,1996; Rassendren et al。 ,1997; Karasawa et al。,2017)。 在这里,我们描述了使用表达P2X7受体的HEK293细胞进行高通量YO-PRO-1摄取测定的逐步方案。 这个为期3天的方案特别适用于检查小分子和突变对P2X7受体功能的影响。 该协议改编自我们之前发表的论文(Karasawa和Kawate,2016)。

【背景】P2X7受体打开可渗透阳离子的膜通道(Surprenant et al。,1996; Sluyter,2017)。虽然电生理学仍然是量化P2X7受体活性的金标准,但这种专门技术可能并不容易获得。此外,电生理学不适合高通量筛选,因为每次记录需要大量的时间和操作。因此,荧光分子的摄取是一种广泛使用的替代方法,特别是用于筛选多种条件/突变体(Cankurtaran-Sayar et al。,2009; Qu et al。 ...

Expression and Purification of a Mammalian P2X7 Receptor from Sf9 Insect Cells
Author:
Date:
2017-09-05
[Abstract]  The P2X7 receptor is an extracellular ATP-gated ion channel found only in eukaryotes (Bartlett et al., 2014). Due to its unique properties among P2X receptors, such as formation of a large conductance pore, the P2X7 receptor has been implicated in devastating diseases like chronic pain (North and Jarvis, 2013). However, mechanisms underlying the P2X7 specific properties remain poorly understood, partly because purification of this eukaryotic membrane protein has been challenging. Here we describe a detailed protocol for expressing and purifying a mammalian P2X7 receptor using an insect cell-baculovirus system. The P2X7 receptor is expressed in Sf9 insect cells as a GFP fusion protein and solubilized with a buffer containing Triton X-100 detergent. The P2X7-GFP fusion protein is ... [摘要]  P2X7受体是仅在真核生物中发现的胞外ATP门控离子通道(Bartlett等,2014)。由于其P2X受体之间的独特性质,例如大电导孔的形成,P2X7受体已经涉及破坏性疾病如慢性疼痛(North和Jarvis,2013)。然而,P2X7特异性属性的机制仍然知之甚少,部分原因是纯化这种真核膜蛋白是一个挑战。在这里,我们描述了使用昆虫细胞 - 杆状病毒系统表达和纯化哺乳动物P2X7受体的详细方案。 P2X7受体在作为GFP融合蛋白的Sf9昆虫细胞中表达,并用含有Triton X-100洗涤剂的缓冲液溶解。然后使用Strep-Tactin亲和层析在含有十二烷基麦芽糖苷的缓冲液中纯化P2X7-GFP融合蛋白。在通过凝血酶酶切割连接的GFP和Strep-标签后,使用大小排阻色谱分离P2X7受体。该方法通常从6L的Sf9培养物产生约2mg的纯化蛋白质。纯化的蛋白质可以用含有15%甘油的缓冲液在4℃下储存至少2个月,并用于各种功能和结构研究(Karasawa和Kawate,2016)。
【背景】P2X7受体是嘌呤能P2X受体家族的七种亚型之一,并且是广泛疾病如神经退行性疾病,癫痫和神经性疼痛的有希望的新型药物靶点(North和Jarvis,2013; Bhattacharya和Biber, ...

Isolation and Expansion of Mesenchymal Stem Cells from Murine Adipose Tissue
Author:
Date:
2017-08-20
[Abstract]  Mesenchymal stem cells (MSCs) are currently intensively studied due to significant promise which they represent for successful implementations of future cell therapy clinical protocols. This in turn emphasizes importance of careful preclinical studies of MSC effects in various murine disease models. The appropriate cell preparations with reproducible biological properties are important to minimize variability of results of experimental cell therapies. We describe here a simple protocol for isolation of murine MSCs from adipose tissues and their reproducible multi-log expansion under hypoxia conditions. [摘要]  间充质干细胞(MSC)目前正在深入研究,因为它们代表未来细胞治疗临床方案的成功实施的重大前景。 这又强调了对各种鼠疾病模型中MSC效应的仔细临床前研究的重要性。 具有可重现的生物学性质的合适的细胞制剂对于最小化实验细胞疗法结果的变异性是重要的。 我们在这里描述了一种用于从脂肪组织中分离鼠MSC的简单方案及其在缺氧条件下的可重复的多对数扩增。
【背景】最初由Friedenstein鉴定的MSC是成纤维细胞样形态的骨髓细胞,粘附于塑料和高自我更新能力,导致体外成纤维细胞样集落的形成(Friedenstein等,1976; Review in Phinney andSensebé ,2013)。 MSCs由于其在医学上的潜在应用,目前是研究最成熟的成体祖细胞类型之一。这些细胞可以从各种器官中分离(Murray等,2014),并且被认为是源于血管,以周细胞或血管壁细胞。除了能够沿着成骨,脂肪形成和软骨形成谱系分化的能力之外,MSC具有免疫调节特性,并且被认为参与对组织损伤的反应,以及通过其影响巨噬细胞极化的能力来组织抗炎反应(Prockop,2013; Caplan,2016)。
   鉴于这些特性,MSCs代表了未来相关细胞治疗临床方案的成功实施的巨大前景。这反过来强调了在各种鼠疾病模型中使用MSC进行仔细临床前研究的重要性。制备大量具有可重复生物学特性的合适细胞样品的能力对于在开发基于MSC的实验细胞疗法期间最小化结果的变异性至关重要。然而,与具有强抗氧化防御性并因此在大气氧条件下相当好的人类MSC不同,小鼠MSC对氧应激更敏感,并且在常规CO2培养箱中培养时具有有限的寿命和扩张能力。相反,在缺氧条件下培养这些细胞,相反,显着延长了它们的寿命,并允许多对数扩增,提供足够量的具有可重复性质的细胞材料,用于用鼠实验疾病模型重复实验(Boregowda等,2012; ...

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