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TW12 water bath

Company: JULABO
Catalog#: 9550112
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High-throughput Microscopic Analysis of Salmonella Invasion of Host Cells
Author:
Date:
2018-09-20
[Abstract]  Salmonella is a Gram-negative bacterium causing a gastro-enteric disease called salmonellosis. During the first phase of infection, Salmonella uses its flagella to swim near the surface of the epithelial cells and to target specific site of infection. In order to study the selection criteria that determine which host cells are targeted by the pathogen, and to analyze the relation between infecting Salmonella (i.e., cooperation or competition), we have established a high-throughput microscopic assay of HeLa cells sequentially infected with fluorescent bacteria. Using an automated pipeline of image analysis, we quantitatively characterized a multitude of parameters of infected and non-infected cells. Based on this, we established a predictive model that ... [摘要]  沙门氏菌是革兰氏阴性细菌,引起称为沙门氏菌病的胃肠疾病。在感染的第一阶段,沙门氏菌使用其鞭毛在上皮细胞表面附近游泳并靶向特定的感染部位。为了研究确定哪种宿主细胞被病原体靶向的选择标准,并分析感染沙门氏菌( ie ,合作或竞争)之间的关系,我们有建立了对荧光细菌依次感染的HeLa细胞的高通量显微镜检测。使用自动化图像分析管道,我们定量表征了感染和未感染细胞的众多参数。基于此,我们建立了一个预测模型,使我们能够识别宿主细胞易受感染的参数。我们发现宿主细胞易损性有两个来源:病原体诱导的细胞易感性从沙门氏菌摄取中出现并持续存在于感染过程的后期阶段;以及与细胞固有属性相关的宿主细胞固有的脆弱性,例如局部细胞拥挤和胆固醇含量。我们的方法基于形态学或分子宿主细胞参数预测单层上皮细胞中沙门氏菌感染的概率。在这里,我们提供了工作流程的详细描述,包括基于计算机的分析管道。我们的方法有可能应用于研究宿主 - 病原体相互作用的其他组合。

【背景】鼠伤寒沙门氏菌血清型鼠伤寒沙门氏菌通过摄入受污染的食物或水感染宿主,引起沙门氏菌病。一旦细菌到达肠道的远端回肠,它们就会侵入广泛的宿主细胞,包括肠上皮细胞(Watson和Holden,2010)。在宿主细胞入侵的第一阶段,沙门氏菌选择其目标,使用其鞭毛游泳并扫描上皮表面(Misselwitz et ...

Root Gall Formation, Resting Spore Isolation and High Molecular Weight DNA Extraction of Plasmodiophora brassicae
Author:
Date:
2018-06-05
[Abstract]  Isolation of DNA from obligate biotrophic soil-borne plant pathogens is challenging. This is because of their strict requirement of living plant tissue for their growth and propagation. A soil habitat further imposes risk of contamination from other microorganisms living in close vicinity of the plant roots. Here we present a protocol on how to prepare DNA suitable for advanced molecular analysis on the soil-borne pathogen Plasmodiophora brassicae, a peculiar unicellular plant pathogenic organism, causing disease on Crucifers. First, it is important to grow Brassica or Arabidopsis plants in infested soils below a temperature of 25 °C under moist conditions to promote root gall formation. Root galls should be harvested ahead of initiation of the decomposing ... [摘要]  从专性营养型土壤植物病原体中分离DNA是具有挑战性的。这是因为他们对植物生长和繁殖的严格要求。土壤栖息地进一步增加了居住在植物根部附近的其他微生物污染的风险。在这里,我们提出了一个关于如何制备适用于土传病原体Plasmodiophora brassicae ,一种特殊的单细胞植物致病生物,导致十字花科病的DNA进行DNA分析的方案。首先,在潮湿条件下,在温度低于25°C的条件下,在感染的土壤中种植芸薹属植物或拟南芥属植物对于促进根gall形成是重要的。在分解过程开始之前,不应迟于接种拟南芥或芜菁植株后四或九周,收获根gall。数量减少的土壤生物的休息孢子通过匀浆gall组织的梯度离心获得。用70%酒精和一套不同的抗生素治疗可促进 P。芸苔纯度。基于CTAB的程序允许分离适合大规模平行测序分析的高质量DNA。

【背景】Plasmodiophora brassicae 是一种土壤传播的植物病原体,其在包括拟南芥属的十字花科家族中引起根虫(棒状杆菌)。根肿病对全世界油菜(油菜)和卷心菜的种植有重大影响。 P上。 brassicae 是指定给超级组Rhizaria的一种专性生物营养素(需要一种生长寄主),Rhizaria是研究最少的真核生物组之一(Sierra等人,2016; Sibbald和Archibald, 2017年)。系统发育上, ...

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