{{'Search' | translate}}
 

BioPhotometer

Company: Eppendorf
Catalog#: BioPhotometer 6131
Bio-protocol()
Company-protocol()
Other protocol()

Platelet Migration and Bacterial Trapping Assay under Flow
Author:
Date:
2018-09-20
[Abstract]  Blood platelets are critical for hemostasis and thrombosis, but also play diverse roles during immune responses. We have recently reported that platelets migrate at sites of infection in vitro and in vivo. Importantly, platelets use their ability to migrate to collect and bundle fibrin (ogen)-bound bacteria accomplishing efficient intravascular bacterial trapping. Here, we describe a method that allows analyzing platelet migration in vitro, focusing on their ability to collect bacteria and trap bacteria under flow. [摘要]  血小板对于止血和血栓形成至关重要,但在免疫反应中也起着不同的作用。 我们最近报道了血小板在体外体外和体内感染部位迁移。 重要的是,血小板利用它们迁移的能力来收集和捆绑纤维蛋白(ogen)结合的细菌,从而实现有效的血管内细菌捕获。 在这里,我们描述了一种方法,允许分析血小板在体外的迁移,重点是它们收集细菌和捕获流动细菌的能力。

【背景】血小板是从巨核细胞释放的小的无核细胞片段,其存在于哺乳动物生物的骨髓内(Machlus和Italiano,2013)。大约7500亿血小板在人体血液中循环,不断扫描脉管系统以破坏内皮表面。在遇到内皮损伤时,血小板立即被招募在充分表征的事件级联中,包括初始血小板束缚和滚动,然后是血小板活化,粘附和扩散,最终导致纤维蛋白(ogen)依赖性聚集和随后的血栓收缩(Jackson, 2007)。血小板栓塞形成是生理性止血的主要步骤,但也是动脉粥样硬化斑块破裂后的病理性血栓形成,触发心肌梗塞或中风(Jackson,2011)。

除了在止血和血栓形成中的公认作用外,血小板还发展出多种免疫功能(Semple et al。,2011)。作为第一批招募炎症和感染部位的细胞,血小板在启动血管内免疫反应中起着重要作用(Wong et ...

Infection of Soybean Plants with the Insect Bacterial Symbiont Burkholderia gladioli and Evaluation of Plant Fitness
Author:
Date:
2017-12-20
[Abstract]  To investigate the establishment and consequences of host-microbe interactions, it is important to develop controlled infection assays suitable for each system, as well as appropriate methods to evaluate successful infection and its associated effects. Here, we describe a procedure for bacterial inoculation of soybean plants, followed by the assessment of systemic infection and impact on plant fitness. Soybean (Glycine max) seedlings were mechanically wounded using a device that mimics insect herbivory and inoculated with known cell numbers of Burkholderia gladioli bacteria previously isolated from an insect host. The impact on the plants was evaluated by monitoring changes in height, time to flowering and chlorophyll content during plant development, and by quantifying ... [摘要]  为了研究宿主 - 微生物相互作用的建立和后果,开发适用于每个系统的受控感染测定法以及评估成功感染及其相关作用的适当方法是重要的。在这里,我们描述了大豆植物的细菌接种程序,然后评估全身感染和对植物健康的影响。使用模拟昆虫食草动物的装置对大豆(Glycine max)幼苗进行机械性伤害,并用先前从昆虫宿主分离的已知细胞数目的伯克霍尔德氏菌(B.coli)进行接种。通过监测植物发育过程中身高,开花时间和叶绿素含量的变化以及通过与用无菌水接种的植物相比量化种子产量来评估对植物的影响。使用定量PCR和荧光原位杂交(FISH)在来自发育植物的组织中检查细菌感染的存在和增殖。

微生物与不同的真核生物建立共生关系,对宿主的适应性有着深远的影响,从有益到不利(Frank,1997)。在许多情况下,这些协会是直接或间接的影响与其他生物,如潜在的替代主机相互作用。举例来说,植物,微生物和昆虫之间有许多三方相互作用,其中微生物共生体在不同宿主之间传播并影响相关生物体的生理或生态(Frago等人)。 ,2012; Gilbert et al。,2012)。在植物性的Lagriinae甲虫中,与来自植物致病性分支的细菌(Burkholderia gladioli)建立了共生伙伴关系,表明这种关联在三方相互作用的情况下发展。先前已经证明了从 Lagria villosa ...

Comments