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FisherbrandTM TraceableTM NanoTM Timer

Company: Fisher Scientific
Catalog#: 14-649-83
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Drosophila Endurance Training and Assessment of Its Effects on Systemic Adaptations
Author:
Date:
2018-10-05
[Abstract]  Exercise induces beneficial systemic adaptations that reduce the incidence of age-related diseases. However, the molecular pathways that elicit these adaptations are not well understood. Understanding the molecular mechanisms that underlie the exercise response can lead to widely beneficial therapies. Large populations, relatively short lifespan, and easily modifiable genetics make Drosophila a well-suited model system for complex, longitudinal studies. We have developed an enforced climbing apparatus for Drosophila, known as the Power Tower, for the study of systemic exercise adaptations. The Power Tower takes advantage of the fly’s natural instinct for negative geotaxis, an innate behavior to run upwards after being tapped to the bottom of their vial. Flies will ... [摘要]  运动诱导有益的系统适应,减少与年龄有关的疾病的发生率。然而,引起这些适应的分子途径还不是很清楚。了解作为运动反应基础的分子机制可以产生广泛有益的疗法。大群体,相对较短的寿命和易于修改的遗传学使得 Drosophila 成为复杂纵向研究的一个非常适合的模型系统。我们开发了一种用于 Drosophila 的强制攀爬装置,称为Power Tower,用于研究系统性运动适应性。 Power Tower利用苍蝇的天然本能来消极地质,这是一种天生的行为,在被轻敲到他们的小瓶底部之后向上运行。苍蝇将持续运行至耗尽点或直至机器关闭,以先到者为准。运动3周后,雄性 Drosophila 适应训练,具有许多类似于哺乳动物模型和人类所见的保守,易于量化的生理改善。在这里,我们描述了一个有用的耐力训练协议和一套有效量化训练效果的训练后评估。
【背景】耐力运动可以降低几乎所有与年龄相关的疾病(Ciolac,2013)。耐力训练对心血管功能,能量代谢和活动有很强的作用,从苍蝇到人类都是高度保守的(Piazza et al。,2009; Booth et al。,2015 ; Wilson et al。,2015)。更好地理解运动的遗传介质可能会导致治疗方法,这些治疗方法可以使因疾病或受伤而无法运动的个体受益。 Drosophila ...

Measurement of Mesenchymal Stem Cells Attachment to Endothelial Cells
Author:
Date:
2018-03-20
[Abstract]  Mesenchymal stem cells (MSCs) have shown profound therapeutic potential in tissue repair and regeneration. However, recent studies indicate that MSCs are largely entrapped in lungs after intravenous delivery and die shortly. The underlying mechanisms have been poorly understood. We have provided evidence to show that excess expression and activation of integrins in culture-expanded MSCs is a critical cause of MSCs adhesion to endothelial cells of the lung microarteries resulting in the entrapment of the cells (Wang et al., 2015). Therefore, it may be meaningful to test the adhesive ability of MSCs to endothelial cells in vitro before intravenous administration to avoid their lung vascular obstructions. Here we report a simple method to measure MSCs attachment to ... [摘要]  间充质干细胞(MSCs)在组织修复和再生中显示出深远的治疗潜力。 然而,最近的研究表明,MSCs在静脉内递送后很大程度上被截留在肺中并且很快死亡。 基本的机制一直不甚了解。 我们提供的证据表明培养扩增的MSCs中整联蛋白的过量表达和活化是MSCs与肺微动脉的内皮细胞粘附的关键原因,导致细胞的包埋(Wang等人 >,2015)。 因此,在静脉给药之前测试MSC对体外内皮细胞的粘附能力以避免它们的肺血管阻塞可能是有意义的。 在这里,我们报告了一种简单的方法来衡量MSC与内皮细胞的附着。

【背景】间充质干细胞(MSCs)正在成为一种极具潜力的治疗药物,许多临床试验正在进行中(Salem和Thiemermann,2010)。由于MSC的方便性和安全性,静脉输注MSCs已成为近期临床试验中MSCs治疗的流行途径(Wu and Zhao,2012)。然而,越来越多的证据表明,MSCs在血管内注射后引起相当大的血管阻塞。在静脉内输注时,超过80%的MSC被包埋在肺中,并且在急性缺血性心脏或脑中仅检测到少于1%的MSC(Lee等人,2009; Toma等人,等人,2009年)。

最近的研究表明,MSCs在静脉内给药后大部分停留在前毛细血管微血管中,并且其中大部分在短期内局部缺血死亡(Toma等人,2009)。因此,血管内给药的MSC的安全性和有效性已成为人们日益关注的问题。尚未完全了解MSCs血管阻塞的机制。 ...

Combination of Fluorescent in situ Hybridization (FISH) and Immunofluorescence Imaging for Detection of Cytokine Expression in Microglia/Macrophage Cells
Author:
Date:
2017-11-20
[Abstract]  Microglia and macrophage cells are the primary producers of cytokines in response to neuroinflammatory processes. But these cytokines are also produced by other glial cells, endothelial cells, and neurons. It is essential to identify the cells that produce these cytokines to target their different levels of activation. We used dual RNAscope® fluorescence in situ hybridization (FISH) and immunohistochemistry (IHC) techniques to visualize the mRNA expression pattern of pro- and anti-inflammatory cytokines in microglia/macrophages cells. Using these methods, we can associate one mRNA to specific cell types when combining with different cellular markers by immunofluorescence. Results from RNAscope® probes IL-1β, TNFα, TGFβ, IL-10 or Arg1, showed colocalization ... [摘要]  小神经胶质细胞和巨噬细胞是响应神经炎症过程的细胞因子的主要生产者。但是这些细胞因子也是由其他神经胶质细胞,内皮细胞和神经元产生的。鉴定产生这些细胞因子的细胞以靶向其不同水平的活化是至关重要的。我们使用双RNAscope荧光原位杂交(FISH)和免疫组织化学(IHC)技术来观察小胶质细胞/巨噬细胞中促炎细胞因子和抗炎细胞因子的mRNA表达模式细胞。使用这些方法,我们可以联合一个mRNA与特定的细胞类型时,通过免疫荧光与不同的细胞标志物结合。来自RNAscope探针的结果IL-1β,TNFα,TGFβ,IL-10或Arg1显示与小胶质细胞/巨噬细胞抗体的共定位。这些靶标探针显示出足够的灵敏度和特异性来检测mRNA表达。新的FISH检测技术结合免疫组化技术将有助于共同确定蛋白质和mRNA的定位,以及提供可靠的mRNA表达水平的量化。
【背景】mRNA原位杂交技术是一种有用的工具,其允许以细胞依赖性方式特异性和选择性标记脑切片中的RNA序列(Grabinski等人,2015 ...

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