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SpectraMax M Series Multi-Mode Microplate Readers

公司名称: Molecular Devices
产品编号: SpectraMax M2
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A Co-culture Assay to Determine Efficacy of TNF-α Suppression by Biomechanically Induced Human Bone Marrow Mesenchymal Stem Cells
Author:
Date:
2017-08-20
[Abstract]  The beneficial effects of mesenchymal stem cell (MSC)-based cellular therapies are believed to be mediated primarily by the ability of MSCs to suppress inflammation associated with chronic or acute injury, infection, autoimmunity, and graft-versus-host disease. To specifically address the effects of frictional force caused by blood flow, or wall shear stress (WSS), on human MSC immunomodulatory function, we have utilized microfluidics to model WSS at the luminal wall of arteries. Anti-inflammatory potency of MSCs was subsequently quantified via measurement of TNF-α production by activated ... [摘要]  认为基于间充质干细胞(MSC)的细胞疗法的有益作用主要是由能够抑制慢性或急性损伤,感染,自身免疫和移植物抗宿主病相关炎症的能力介导的。 为了专门解决由血流或壁剪应力(WSS)引起的摩擦力对人MSC免疫调节功能的影响,我们利用微流体在动脉腔壁上建模WSS。 随后通过在共培养测定中通过活化的小鼠脾细胞测量TNF-α产生来量化MSC的抗炎效力。 TNF-α抑制测定作为MSC效力的功能评估的可重现平台,并且表现出作为MSC治疗功效的替代测定的预测价值。
【背景】间充质干细胞(MSC)的免疫调节活性由直接细胞相互作用和旁分泌因子介导(Singer和Caplan,2011;英语,2013)。 MSCs被认为是源于与骨髓和各种组织内脉管系统内皮细胞相关的周细胞(Sacchetti et al。,2007; Crisan et al。,2008)。这种独特的血管周围位置将它们置于血流中的炎症和其他可溶性因子附近,使其监测系统信号。事实上,将壁壁细胞募集到内皮是血管成熟的关键事件,周细胞在血管维持和完整性中起关键作用(Benjamin et al。,1998; ...

Procedure for Rhamnolipids Quantification Using Methylene-Blue
Author:
Date:
2016-04-05
[Abstract]  Rhamnolipids produced by Pseudomonas aeruginosa (P. aeruginosa) represent a group of biosurfactants with various applications (e.g., bioremediation of oil spills, cosmetics, detergents and cleaners). The commonly used colorimetric methods for rhamnolipid quantification, including anthrone, phenol−sulfuric acid and orcinol based quantification (Helbert and Brown, 1957; Chandrasekaran and BeMiller, 1980), are laborious and operationally hazardous because of the strong acid/chemical emanation which can cause deterioration of instruments measurements (e.g., ... [摘要]  由绿脓杆菌(铜绿假单胞菌)产生的鼠李糖脂代表一组具有各种应用的生物表面活性剂(例如生物修复的溢油,化妆品,洗涤剂和清洁剂)。常用的鼠李糖脂定量的比色方法,包括蒽酮,苯酚 - 硫酸和基于苔藓醇的定量(Helbert和Brown,1957; Chandrasekaran和BeMiller,1980)是费力和操作上危险的,因为强酸/化学散发仪器测量的恶化(例如分光光度计)。因此,基于亚甲蓝的分析显示为基于化学络合反应安全定量整个鼠李糖脂分子的有希望的替代物(Pinzon和Ju,2009)。事实上,亚甲基蓝和鼠李糖脂在水 - 氯仿相系统中形成复合物。将鼠李糖脂 - 亚甲基蓝复合物分配到氯仿相中,其将形成蓝色,其可以在638nm下定量以推断鼠李糖脂浓度。在这里,我们描述基于亚甲基蓝的鼠李糖脂定量程序的变体,允许在标准96孔塑料微量滴定板相反的原始亚甲蓝程序,由于氯仿化学属性需要特定和昂贵的微孔板分光光度定量。

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