{{'Search' | translate}}
 

Corning® Small Cell Scraper

Corning ®小细胞刮刀

Company: Corning
Catalog#: 3010
Bio-protocol()
Company-protocol()
Other protocol()

Adhesion and Invasion Assay Procedure Using Caco-2 Cells for Listeria monocytogenes
Author:
Date:
2017-05-05
[Abstract]  Listeria monocytogenes is an important Gram-positive foodborne pathogen that is a particular problem in ready-to-eat food. It has an ability to survive in harsh conditions like refrigeration temperatures and high salt concentrations and is known to cross intestinal, placental and blood-brain barriers. Several cancerous cell lines like cervical, liver, dendritic, intestinal and macrophages have been used to study in vitro propagation and survival of listeria in human cells. Human intestinal epithelial cells have been used to study how listeria crosses the intestinal barrier and cause infection. The protocol in this articles describes the procedures to grow Caco-2 cells, maintain cells and use them for adhesion and invasion assays. During adhesion assay the cells are ... [摘要]  单核细胞增生利斯特氏菌是一种重要的革兰氏阳性食源性病原体,是即食食品中的一个特殊问题。它具有在诸如制冷温度和高盐浓度的恶劣条件下生存的能力,并且已知可以穿过肠,胎盘和血脑屏障。已经使用了诸如子宫颈,肝脏,树突状细胞,肠和巨噬细胞的几种癌细胞系来研究人细胞中李斯特菌的体外扩增和存活。人肠上皮细胞已被用于研究李斯特菌如何穿过肠屏障并引起感染。本文中的方案描述了生长Caco-2细胞的过程,维持细胞并将其用于粘附和侵袭测定。在粘附测定期间,将细胞与李斯特菌孵育30分钟,但是在侵袭测定中,细胞生长在感染后的几个时间点被停止以监测细胞中李斯特菌的生长和存活率。

背景 ...

Mouse Model of Dengue Virus Infection with Serotypes 1 and 2 Clinical Isolates
Author:
Date:
2016-12-05
[Abstract]  Dengue is a global public health threat caused by infection with any of the 4 related dengue virus serotypes (DENV1-4). Clinical manifestations range from self-limiting febrile illness, known as dengue fever (DF), to life-threatening severe diseases, such as dengue hemorrhagic fever (DHF) or dengue shock syndrome (DSS). Most cases of DHF/DSS are associated with secondary heterotypic infections through a phenomenon that is described as antibody-dependent enhancement of infection (ADE). There are an estimated 400 million human infections and several hundred thousand cases of severe dengue occurring yearly. At present, however, there are no approved antiviral drugs against DENV infection. The lack of a suitable animal model has hampered the evaluation of novel antiviral candidates for DENV ... [摘要]  登革热是由4种相关登革热病毒血清型(DENV1-4)的任一种感染引起的全球公共卫生威胁。临床表现的范围从自限性发热疾病,称为登革热(DF),到危及生命的严重疾病,如登革热出血热(DHF)或登革热休克综合征(DSS)。大多数DHF/DSS病例通过描述为抗体依赖性增强感染(ADE)的现象与继发性异型感染相关。估计每年有4亿人感染和数十万例严重登革热病例。然而,目前,还没有批准的抗DENV感染的抗病毒药物。缺乏合适的动物模型阻碍了DENV感染的新抗病毒候选物的评价。由于DENV在免疫活性小鼠中不良地建立感染,已将AG129小鼠(缺乏I型和II型IFN [干扰素]受体)和小鼠适应的DENV2株应用于能够繁殖人类感染的几种主要病理的登革动物模型。最近,我们开发了具有临床分离株DENV1和DENV2的新的小鼠模型,其将用于药物测试和登革热发病机理研究(Watanabe等人,2016)。在这里我们描述建立临床分离株的登革热小鼠模型的细节;从体外材料制备到体内病毒感染。值得注意的是,由于DENV在小鼠中的感染性在病毒株之间不同,不是所有临床分离株都可以诱导严重的登革热。
关键字:登革热病毒,致命的小鼠模型,临床病毒,病毒感染的抗体依赖性增强,药物测试

[背景] 为了克服DENV在啮齿动物细胞中不能很好复制的缺点,多年来已经进行了许多努力来开发模拟人类登革热感染的小动物模型。近交小鼠模型系统允许实验可变性最小化,并且遗传工程小鼠模型能够再现动物中登革热临床症状的一些方面。过去的研究显示,用DENV2临床分离物感染的AG129小鼠(缺乏I型和II型IFN受体)感染瘫痪的迹象,这是中枢神经系统受累的病症,在人类病例中是罕见的(Shresta等人。,2004)。或者,产生可在AG129小鼠中诱导人类DHF/DSS样疾病的小鼠适应的DENV2毒株,并已用于登革热研究(Shresta等人,2006; ...

Determination of the Glycolysis and Lipogenesis in Culture of Hepatocytes
Author:
Date:
2016-11-05
[Abstract]  Metabolic flux analyses are needed to provide insights into metabolic regulation that occurs in cells. The current protocol describes fast and reproducible methods for determining glycolysis and de novo lipogenesis of hepatocytes. Primary culture of hepatocytes is an ‘in vitro’ model useful to study liver glucose and lipid metabolism (Denechaud et al., 2016). The protocol is divided in 2 parts. Part I: Glycolysis experiment is assessed using the Seahorse extracellular flux (XF) analyser. Glycolysis is determined via the measurement of the extracellular acidification rate (ECAR) of the media, which come predominately from the cellular excretion of lactic acid after the conversion of glucose in pyruvate. Part II: De novo lipogenesis experiment determines ... [摘要]  需要代谢通量分析来提供细胞中发生的代谢调节的见解。目前的协议描述了确定糖酵解和肝细胞脂肪生成的快速和可重复的方法。肝细胞的原代培养是用于研究肝葡萄糖和脂质代谢的"体外"模型(Denechaud等人,2016)。协议分为2部分。第I部分:使用海马细胞外通量(XF)分析仪评估糖酵解实验。糖酵解通过测量培养基的细胞外酸化速率(ECAR)来确定,所述培养基主要来自丙酮酸中葡萄糖转化后乳酸的细胞排泄。第II部分:新生脂肪生成实验测定来自乙酸盐C 14+前体的甘油三酯(TG)中的放射性C 14+掺入。在2小时后,向培养基中补加乙酸盐,提取脂质,并在新合成的TG标记的定量之前通过TLC(薄层色谱)分离。

[背景] 有不同的方法来评估葡萄糖和脂质代谢:代谢物定量,酶活性和代谢组学...我们的协议聚焦于活细胞的代谢通量分析并且不需要代谢组学设施。海马细胞外通量(XF)分析仪,现在存在于很多机构,是通过确定培养基pH值间接测量活细胞间接糖酵解的强大工具。脂肪生成协议不需要大投资,是高度可重复的。也可以使用氚化水确定,其通过脂肪酸合酶引入新鲜合成的脂质中。

Comments