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Rnase-Free Dnase Set (50)

无核糖核酸酶组

Company: QIAGEN
Catalog#: 79254
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Generation of Human iPSC-derived Neural Progenitor Cells (NPCs) as Drug Discovery Model for Neurological and Mitochondrial Disorders
Author:
Date:
2021-03-05
[Abstract]  

The high attrition rate in drug development processes calls for additional human-based model systems. However, in the context of brain disorders, sampling live neuronal cells for compound testing is not applicable. The use of human induced pluripotent stem cells (iPSCs) has revolutionized the field of neuronal disease modeling and drug discovery. Thanks to the development of iPSC-based neuronal differentiation protocols, including tridimensional cerebral organoids, it is now possible to molecularly dissect human neuronal development and human brain disease pathogenesis in a dish. These approaches may allow dissecting patient-specific treatment efficacy in a disease-relevant cellular context. For drug discovery approaches, however, a highly reproducible and cost-effective cell model is

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[摘要]  [摘要]药物开发过程中的高流失率要求使用其他基于人的模型系统。但是,在脑部疾病的情况下,不适合对活的神经元细胞进行采样以进行化合物测试。人类诱导的多能干细胞(iPSC )的使用彻底改变了神经元疾病建模和药物发现领域。由于基于iPSC的神经元分化方案(包括三维脑类器官)的发展,现在可以在一个碟子中分子解剖人神经元发育和人脑疾病的发病机理。这些方法可以允许在与疾病相关的细胞环境中解剖患者特异性的治疗功效。但是,对于药物发现方法,需要高度可复制且具有成本效益的细胞模型。在这里,我们描述了一种一步-步骤,用于从人产生健壮和可膨胀的神经祖细胞(NPC)工艺的iPSC 。用此协议生成的NPC是同质的且高度增殖。这些功能使NPC适合开发用于药物发现的高通量化合物筛选。人iPSC衍生的NPC示出了代谢依赖于线粒体活性,因此可也用于研究神经病症,其中线粒体功能受到影响。该协议涵盖了制备,培养和表征人iPSC来源的NPC所需的所有步骤。


图形摘要:


示意性的协议的所述发电机密封的离子人类源自iPSC的的NPC

[背景技术]近年来,目标为中心的药物发现的缺点已经用于寻址的神经系统疾病的方案变得明显,特别是(保罗等人,2010) ...

RNA Extraction from Ears and Draining Lymph Nodes of Mice Infected with Leishmania amazonensis
Author:
Date:
2020-06-05
[Abstract]  Parasites of the genus Leishmania infect the mammalian hosts, including mice and humans and cause cutaneous or visceral leishmaniasis depending upon the parasite species transmitted by the vector sandfly. Leishmania amazonensis is one of the Leishmania species responsible for the cutaneous form of the disease. We have inoculated with these parasites the ear dermis of mice. RNA preparations were performed from fragmented tissues using a buffer containing guanidin isothiocynate (RLT buffer, RNeasy Mini Kit, Qiagen, SAS, France) and β-mercaptoethanol. Both reagents facilitate the isolation of intact RNA from tissues and the use of the RNeasy Kits present with several advantages that facilitate the isolation of pure non-degraded total RNA: i) This method allows to ... [摘要]  [摘要] 寄生虫 利什曼原虫感染哺乳动物宿主,包括小鼠和人类的原因皮肤或内脏Leishm Aniasis根据在转交了该载体的寄生虫种类白蛉。利什曼原虫亚马孙是的利什曼原虫物种负责对皮肤型疾病。我们已经接种这些RNA制备物从零散组织用含有缓冲液中进行guanidin 异硫氰酸(RLT缓冲液,RNeasy Mini试剂盒,Qiagen公司,SAS,法国)和β - 巯基乙醇。 两种试剂促进完整的RNA的从组织中分离,并与促进纯非恶化的总RNA的分离几个优点使用RNeasy试剂试剂盒本的:我)Ť 他的方法允许避免苯酚的在RNA提取存在缓冲液,通常在备选方案中使用;ⅱ)此外焦碳酸二乙酯(DEPC)处理的玻璃器皿,以避免RNA酶的样品的污染,不与该协议所需的;ⅲ)˚F inally,它是一个快速的过程和分离的总RNA可将其浓缩在小体积中,以利于其用于下游实验程序。

[背景] 属的病原体利什曼出生动物传染病与多种临床表现和疾病严重程度可变性的原因矢量(曼索托等人,2007)利什曼病的皮肤.The形式是由几个引起利什曼原虫种包括利什曼原虫亚马孙(麦克马洪-Pratt and Alexander,2004; Christensen et al。,2019)。

小鼠模型的存在,对皮肤利什曼病的敏感性高,中度或无敏感性,促进了寄生虫传播实验规程的发展(de ...

Long-term in vitro Culture of Cryptosporidium parvum
Author:
Date:
2018-08-05
[Abstract]  Continuous in vitro growth of Cryptosporidium parvum has proved difficult and conventional in vitro culture techniques result in short-term (2-5 days) growth of the parasite resulting in thin-walled oocysts that fail to propagate using in vitro cultures, and do not produce an active infection using immunosuppressed or immunodeficient mouse models (Arrowood, 2002). Here we describe the use of hollow fiber bioreactors (HFB) that simulate in vivo conditions by providing oxygen and nutrients to host intestinal cells from the basal surface and permit the establishment of a low redox, high nutrient environment on the apical surface. When inoculated with 105 C. parvum (Iowa isolate) oocysts the bioreactor produced 108 ... [摘要]  Cryptosporidium parvum 的连续体外生长已证明是困难的,并且常规体外培养技术导致短期(2-5天)生长寄生虫导致薄壁卵囊不能使用体外培养物繁殖,并且不使用免疫抑制或免疫缺陷小鼠模型产生活跃感染(Arrowood,2002)。在这里,我们描述了中空纤维生物反应器(HFB)的使用,通过提供氧气和营养物质从基础表面宿主肠细胞模拟体内条件,并允许建立低氧化还原,高营养环境顶面。当接种10 5 C时。 parvum (爱荷华州分离物)卵囊生物反应器在14天后每ml产生10个 8 卵囊(20ml额外毛细血管体积),并保持2年以上。使用TCR-α免疫缺陷小鼠模型的体内感染性研究显示,在6,12和18个月时从生物反应器产生的卵囊与用于启动培养的亲本Iowa分离物无法区分。 HFB产生的卵囊具有与亲本爱荷华分离物类似的百分比分析。

【背景】 Cryptosporidium parvum 是人和其他哺乳动物肠道的细胞内专性寄生虫,导致急性腹泻。该疾病在免疫功能正常的个体中是自限性的,然而,在免疫功能低下的成人和幼儿中,该疾病可能危及生命(Kotloff,2017)。它是经济资源低的国家中三种被诊断出的儿童肠道疾病之一(Kotloff et al。,2013; Sow et ...

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