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Hydrochloric acid

盐酸(HCl)

Company: Sigma-Aldrich
Catalog#: 258148
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Immunohistochemistry of Kidney a-SMA, Collagen 1, and Collagen 3, in A Novel Mouse Model of Reno-cardiac Syndrome
Author:
Date:
2020-09-20
[Abstract]  Cardiorenal syndrome defines a synergistic pathology of the heart and kidneys where failure of one organ causes failure in the other. The incidence of cardiovascular mortality caused by this syndrome, is 20 fold higher in the end stage renal disease (ESRD) population compared to the population as a whole thus necessitating the need for improved therapeutic strategies to combat reno-cardiac pathologies.

Murine in vivo models play a major role in such research permitting precise genetic modification thus reducing miscellany, however presently there is no steadfast model of reno-cardiac syndrome in the most common genetically modified mouse strain, the C57BL/6 mouse. In this study we have modified an established model of chronic renal disease using adenine diet and ...
[摘要]  [摘要 ] 心肾综合征定义了心脏和肾脏的协同病理,其中一个器官的衰竭导致另一个器官的衰竭。与整个人群相比,该综合征导致的心血管疾病死亡率在终末期肾脏病(ESRD)人群中要高出20倍,因此有必要改善治疗策略以应对肾病。

小鼠体内模型在允许精确基因修饰从而减少杂项的研究中起主要作用,但是目前在最常见的基因修饰小鼠品系C57BL / 6小鼠中还没有稳定的雷诺-心脏综合征模型。在这项研究中,我们使用腺嘌呤饮食修改了已建立的慢性肾脏疾病模型,并扩展了在C57BL / 6小鼠中实现慢性肾功能衰竭和随之而来的肾心脏综合征的相关病理。

使八周大的雄性C57BL / 6小鼠适应7天,然后给予0.15%腺嘌呤饮食或对照饮食20周,此后终止实验,收集血液,尿液和器官并进行生化和免疫组织化学分析。

施用0.15%的腺嘌呤饮食会导致进行性肾功能衰竭,从而导致肾性心脏病综合征,这可通过心体重比显着增加来证实(P <0.0001)。血液生化表明,用腺嘌呤喂养的小鼠血清肌酐,尿素含量显着增加(P <0.0001),肾小球滤过率显着降低(P <0.05),而肾脏的α-SMA,胶原蛋白1和胶原蛋白3免疫组化显示严重的纤维化。

我们提出了一种新型的腺嘌呤饮食方案,该方案在C57BL / ...

Bacterial Microcolonies in Gel Beads for High-throughput Screening
Author:
Date:
2018-07-05
[Abstract]  High-throughput screening of a DNA library expressed in a bacterial population for identifying potentially rare members displaying a property of interest is a crucial step for success in many experiments such as directed evolution of proteins and synthetic circuits and deep mutational scanning to identify gain- or loss-of-function mutants.

Here, I describe a protocol for high-throughput screening of bacterial (E. coli) microcolonies in gel beads. Single cells are encapsulated into monodisperse water-in-oil emulsion droplets produced with a microfluidic device. The aqueous solution also contains agarose that gelates upon cooling on ice, so that solid gel beads form inside the droplets. During incubation of the emulsion, the cells grow into monoclonal microcolonies ...
[摘要]  在细菌群体中表达的DNA文库的高通量筛选用于鉴定显示感兴趣性质的潜在稀有成员是在许多实验中成功的关键步骤,例如蛋白质和合成回路的定向进化以及用于鉴定增益的深度突变扫描 - 或功能丧失的突变体。

在这里,我描述了一种用于高通量筛选凝胶珠中细菌(大肠杆菌)微菌落的方案。将单细胞包封成用微流体装置产生的单分散油包水乳液液滴。水溶液还含有琼脂糖,其在冰上冷却时凝胶化,从而在液滴内部形成固体凝胶珠。在乳液温育期间,细胞在珠内生长成单克隆微菌落。在从乳液中分离凝胶珠并通过荧光激活细胞分选(FACS)分选后,从凝胶珠中回收细菌,然后准备进行进一步的分选,诱变或分析。为了通过FACS分类,该方案需要荧光读数,例如荧光报告蛋白的表达。测量微小菌落的平均荧光信号降低了高表型细胞间变异性的影响,并且与单细胞分选相比提高了灵敏度。我们应用这种方法在ON和OFF状态下对pBAD启动子文库进行分类(Duarte et al。,2017)。

【背景】荧光激活细胞分选(FACS)具有> 10 7 事件/ h的无与伦比的筛选通量(Davies,2012)。然而,通过FACS根据其荧光分选单个细胞以筛选合成回路的文库(Schaerli和Isalan,2013)经常受到高表型细胞间变异性的阻碍。或者,可以对水凝胶珠中所含的小细胞集落(微集落)进行分类(Weaver ...

Heterologous Expression and Purification of the CRISPR-Cas12a/Cpf1 Protein
Author:
Date:
2018-05-05
[Abstract]  This protocol provides step by step instructions (Figure 1) for heterologous expression of Francisella novicida Cas12a (previously known as Cpf1) in Escherichia coli. It additionally includes a protocol for high-purity purification and briefly describes how activity assays can be performed. These protocols can also be used for purification of other Cas12a homologs and the purified proteins can be used for subsequent genome editing experiments.


Figure 1. Timeline of activities for the heterologous expression and purification of Francisella novicida Cas12a (FnCas12a) from Escherichia coli
[摘要]  该协议提供了分步说明(图1),用于在大肠杆菌中异源表达新西兰弗朗西斯菌弗朗西丝菌Cas12a(以前称为Cpf1)。 它还包括一个高纯度纯化方案,并简要介绍如何进行活性测定。 这些方案也可以用于其他Cas12a同系物的纯化,并且纯化的蛋白质可以用于随后的基因组编辑实验。

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图1.从大肠杆菌 异源表达和纯化<弗朗西斯弗朗西丝菌 Cas12a(FnCas12a)的活动时间表

【背景】原核CRISPR-Cas免疫系统通过使用CRISPR RNA(crRNA)作为外源DNA或RNA的序列特异性靶向的指导来提供针对病毒和质粒的保护(van der Oost等人,2014; Marraffini ,2015)。 1类CRISPR-Cas系统(包含I型,III型和IV型)通常形成多亚基蛋白-cRNA效应复合物,而2类系统(包含II型,V型和VI型)依赖于单个crRNA-引导的效应物核酸酶用于目标干扰(Mohanraju et al。 2016年)。

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