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VWR SignatureTM Ergonomic High Performance Single-Channel Variable Volume Pipettors

VWR SignatureTM Ergonomic High Performance Single-Channel Variable Volume Pipettors

Company: VWR
Catalog#: 89079-974
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Small Molecule-Based Retinal Differentiation of Human Embryonic Stem Cells and Induced Pluripotent Stem Cells
Author:
Date:
2018-06-20
[Abstract]  Retinal degeneration leads to loss of light-sensing photoreceptors eventually resulting in vision impairment and impose a heavy burden on both patients and the society. Currently available treatment options are very limited and mainly palliative. Ever since the discovery of human pluripotent stem cell technologies, cell replacement therapy has become a promising therapeutic strategy for these patients and may help restore visual function. Reproducibly generating enriched retinal cells including retinal progenitors and differentiated retinal neurons such as photoreceptors using human embryonic stem (ES) cells and induced pluripotent stem (iPS) cells in a dish is an essential first step for developing stem cell-based therapies. In addition, this will provide a reliable and sufficient supply ... [摘要]  视网膜变性导致光感受器丧失,最终导致视力损害,并给患者和社会带来沉重的负担。目前可用的治疗方案非常有限,主要是姑息治疗。自从人类多能干细胞技术的发现以来,细胞替代疗法已成为这些患者的有希望的治疗策略,并可能有助于恢复视觉功能。使用人类胚胎干(ES)细胞和诱导多能干(iPS)细胞在培养皿中重现性地产生包括视网膜祖细胞和分化的视网膜神经元(例如光感受器)的富集视网膜细胞是开发基于干细胞的治疗的重要的第一步。此外,这将为研究疾病机制提供可靠和充足的人类视网膜细胞供应。在这里,我们描述了一种小分子视网膜诱导协议,已被用于生成视网膜祖细胞和分化的视网膜神经元,包括来自几个人ES和iPS细胞系的光感受器。通过该方案产生的视网膜细胞可以在视网膜下移植后的几个月内存活并且功能性地整合到正常和患病的小鼠视网膜中。

【背景】世界各地的一些团体正在开发用于从人多能干细胞产生特定细胞类型的方法。这些细胞可能在再生医学的未来作为替代细胞的来源中发挥关键作用。这些新产生的人类细胞在开发更好和更准确的人类疾病模型中非常有用,然后可用于发现具有更好功效和安全性的新药。

我们的工作重点是影响全球数百万人的视网膜退行性疾病,如黄斑变性和视网膜色素变性。视网膜中光感受器的死亡通常与这些疾病相关,并导致严重损伤或全部视力丧失。没有有效的药物治疗可以治愈这些疾病。
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Total RNA Extraction from Dinoflagellate Symbiodinium Cells
Author:
Date:
2018-06-05
[Abstract]  Dinoflagellates are unicellular algae that can have photosynthetic or nonphotosynthetic lifestyles. Dinoflagellates in the genus Symbiodinium can enter endosymbiotic associations with corals, providing the metabolic basis for the highly productive and biologically diverse coral-reef ecosystems (Hoegh-Guldberg, 1999), as well as with other cnidarians, including sea anemones and jellyfish, and non-cnidarian hosts (Trench, 1993; Lobban et al., 2002; Mordret et al., 2016).

Here, I describe a protocol for isolating total RNA from Symbiodinium cells.
[摘要]  鞭毛藻是单细胞藻类,可以有光合或非光合生活方式。 Symbiodinium属中的甲藻类可以与珊瑚进入内共生关系,为高生产力和生物多样性珊瑚礁生态系统提供代谢基础(Hoegh-Guldberg,1999),以及其他的cnidarians,包括 海葵和海蜇,以及非刺猬寄主(Trench,1993; Lobban等人,2002; Mordret等人,2016)。

在这里,我描述了从Symbiodinium细胞中分离总RNA的方案。

Dual-sided Voltage-sensitive Dye Imaging of Leech Ganglia
Author:
Date:
2018-03-05
[Abstract]  In this protocol, we introduce an effective method for voltage-sensitive dye (VSD) loading and imaging of leech ganglia as used in Tomina and Wagenaar (2017). Dissection and dye loading procedures are the most critical steps toward successful whole-ganglion VSD imaging. The former entails the removal of the sheath that covers neurons in the segmental ganglion of the leech, which is required for successful dye loading. The latter entails gently flowing a new generation VSD, VF2.1(OMe).H, onto both sides of the ganglion simultaneously using a pair of peristaltic pumps. We expect the described techniques to translate broadly to wide-field VSD imaging in other thin and relatively transparent nervous systems. [摘要]  在这个协议中,我们介绍了一种有效的方法,用于Tomina和Wagenaar(2017)中使用的电压敏感染料(VSD)加载和水蛭神经节成像。 解剖和染料加载程序是成功完成全神经节VSD成像的关键步骤。 前者需要去除覆盖水蛭节段神经节神经元的鞘,这是成功染料加载所需的。 后者需要使用一对蠕动泵同时轻柔地将新一代VSD VF2.1(OMe).H流入神经节的两侧。 我们期望所描述的技术广泛地转化为其他薄且相对透明的神经系统中的宽视场VSD成像。

【背景】双面显微镜是一种宽视野荧光成像系统,由一对精确对准的显微镜组成,用于观察来自对面的神经元制剂并且一次显示不同的焦平面(Tomina and Wagenaar,2017)。通过将该光学系统与新一代电压敏感染料(VSD),VoltageFluor(Miller等人,2012; Woodford等人,2015),荧光可以同时从不同深度的神经元捕获编码具有高保真度膜电压的信号。我们将这种泛神经元记录系统应用于药用水蛭的神经系统,我们利用电生理学方法诱发虚构行为并定量控制可识别神经元的膜电位(Tomina and ...

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