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50 mL StripetteTM Serological Pipets, Polystyrene, Individually Plastic Wrapped, Sterile, 25/Bag, 100/Case

公司名称: Corning
产品编号: 4501
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Adhesion of Enteroaggregative E. coli Strains to HEK293 Cells
Author:
Date:
2018-04-20
[Abstract]  Enteroaggregative Escherichia coli (EAEC) is a recognized cause of acute diarrhea among both children and adults worldwide. EAEC strains are characterized by the presence of aggregative adherence fimbriae (AAF), which play a key role in pathogenesis by mediating attachment to the intestinal mucosa and by triggering host inflammatory responses. The aggregative adherence fimbria II (AAF/II) is the most important adherence factor of EAEC prototype strain 042 (EAEC042) to intestinal cells. Multiple receptors for AAF/II on epithelial cells have been identified including the transmembrane ... [摘要]  肠道集聚性大肠杆菌(EAEC)是全球儿童和成人急性腹泻的公认原因。 EAEC菌株的特征在于存在聚集粘附菌毛(AAF),其通过介导与肠粘膜的附着和通过引发宿主炎症反应而在发病机制中起关键作用。 聚合粘附菌毛II(AAF / II)是EAEC原型菌株042(EAEC042)对肠细胞最重要的粘附因子。 已经鉴定了上皮细胞上AAF / II的多种受体,包括跨膜信号传导粘蛋白Muc1。 该协议描述了测量EAEC菌株对表达Muc1糖蛋白的HEK293细胞的依从性的方法。

【背景】EAEC是世界范围内地方性和流行性腹泻病的重要原因。尽管发展中国家儿童腹泻最常见,但EAEC还与免疫受损成人腹泻,旅行者和工业化国家的食源性疾病有关,例如由志贺毒素(Stx)2a型产生的大致致命爆发2011年在北欧的血清型O104:H4的EAEC菌株(Harrington等人,2006; Rasko等人,2011)。 EAEC发病机制由生物体粘附肠细胞,产生肠毒素和细胞毒素并最终诱导炎症的能力决定(Harrington等,2006)。 EAEC对肠细胞的依从性由AAF菌毛粘附素介导(Czeczulin等人,1997)。迄今为止,已经描述了至少5种AAF菌毛的变体,全部编码在范围为55至65MDa的毒力质粒中(Jonsson等人,2015)。 ...

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 ... [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。

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