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Sodium Bicarbonate

Company: Fisher ScientificTM
Catalog#: S233-500
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Preparing Viable Hippocampal Slices from Adult Mice for the Study of Sharp Wave-ripples
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Date:
2020-10-05
[Abstract]  We describe a protocol for preparing acute brain slices which can produce robust hippocampal sharp wave-ripples (SWRs) in vitro. The protocol is optimized for its simplicity and reliability for the preparation of solutions, slicing, and recovery incubation. Most slices in almost every mouse prepared though the protocol expressed vigorous spontaneous SWRs for ~24 h, compared to the 20-30% viability from "standard" low sodium slicing protocols. SWRs are spontaneous neuronal activity in the hippocampus and are essential for consolidation of episodic memory. Brain slices reliably expressing SWRs are useful for studying memory impairment and brain degeneration diseases in ex vivo experiments. Spontaneous expression of SWRs is sensitive to conditions of slicing and ... [摘要]  [摘要]我们描述了一种制备急性脑切片的方案,该方案可在体外产生强大的海马锐波波纹(SWR)。该协议经过优化,其简单性和可靠性可用于制备溶液,切片和恢复孵育。通过该协议,几乎每只小鼠中的大多数切片都表现出强烈的自发性SWR,持续约24小时,而“标准”低钠切片协议的生存力为20-30%。SWR是海马的自发性神经元活动,对于巩固发作性记忆至关重要。可靠表达SWR的脑片可用于研究离体的记忆障碍和脑退化疾病实验。SWR的自发表达对记录期间的切片和灌注/充氧条件敏感。SWR的振幅和丰度通常用作可行切片的生物标记。关键改进包括快速循环,切片后较长的恢复时间(3-6小时)以及使组织在32岁时恢复°C在充分灌注的培养箱中。我们定制设备中的切片可以表达自发SWR数小时,这表明在本地网络中具有平衡的激发和抑制作用的时间很长。年龄较大的小鼠(约产后180天)的切片显示出与年龄较小的小鼠(产后21-30)相似的生存力。


[背景]急性脑切片已成为电生理学和其他神经科学研究的重要准备。尽管有大量文献描述了脑切片的用法,但通常不那么详细地讨论可靠地生产可行切片的方案。来自年长动物的切片通常不太可行。通常使用健康的细胞形态和神经元的电生理特性来描述脑切片的活力。但是,组织中看起来健康的神经元并不总是转化为正常的网络行为。例如,用标准蔗糖替代方案制备的薄片(例如,Aghajanian和Rasmussen ...

Generation of T cells from Human and Nonhuman Primate Pluripotent Stem Cells
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Date:
2020-07-05
[Abstract]  Pluripotent stem cells (PSCs) have the potential to provide homogeneous cell populations of T cells that can be grown at a clinical scale and genetically engineered to meet specific clinical needs. OP9-DLL4, a stromal line ectopically expressing the Notch ligand Delta-like 4 (DLL4) is used to support differentiation of PSCs to T-lymphocytes. This article outlines several protocols related to generation of T cells from human and non-human primate (NHP) PSCs, including initial hematopoietic differentiation of PSC on OP9 feeders or defined conditions, followed by coculture of the OP9-DLL4 cells with the PSC-derived hematopoietic progenitors (HPs), leading to efficient differentiation to T lymphocytes. In addition, we describe a protocol for robust T cell generation from hPSCs conditionally ... [摘要]  [摘要] 多能干细胞(PSCs)有潜力提供同质的T细胞群体,这些细胞可以在临床规模上生长,并通过基因工程来满足特定的临床需求。OP9-DLL4是一种异位表达Notch配体Delta-like 4(DLL4)的基质细胞系,用于支持psc向T淋巴细胞的分化。本文概述了从人类和非人类灵长类(NHP)PSC中产生T细胞的几种方法,包括在OP9喂食者或特定条件下对PSC进行初始造血分化,然后将OP9-DLL4细胞与PSC衍生的造血祖细胞(HPs)共培养,从而有效地分化成T淋巴细胞。此外,我们描述了一个从有条件表达ETS1的hPSCs中产生健壮T细胞的方案。所提出的协议提供了一个平台,用于疾病建模和评估其在大型动物模型免疫治疗中的应用。

[背景] T淋巴细胞(T细胞)在细胞介导的免疫反应中起着关键作用,参与肿瘤细胞的监测和杀伤。在过去的几十年里,已经开发了几种策略来重定向、培养和/或增强抗肿瘤的T淋巴细胞(Houot等人,2015年;June等人,2018年),并将其用于基于T细胞的过继免疫治疗。最近的临床试验表明,用嵌合抗原受体(CAR)-T细胞治疗复发性和难治性淋巴瘤患者的疗效显著(Riviere和Sadelain,2017)。

人类多能干细胞(hPSCs),包括胚胎(hESCs)和诱导(hiPSCs),为生产用于过继性细胞免疫疗法的T细胞提供了一种很有前景的资源,可与基因工程技术相结合,产生现成的CAR ...

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