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Kanamycin Sulfate

硫酸卡那霉素

公司名称: Thermo Fisher Scientific
产品编号: 11815024
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RNA ImmunoGenic Assay: A Method to Detect Immunogenicity of in vitro Transcribed mRNA in Human Whole Blood
Author:
Date:
2020-12-20
[Abstract]  The mRNA therapeutics is a new class of medicine to treat many various diseases. However, in vitro transcribed (IVT) mRNA triggers immune responses due to recognition by human endosomal and cytoplasmic RNA sensors, but incorporation of modified nucleosides have been shown to reduce such responses. Therefore, an assay signifying important aspects of the human immune system is still required. Here, we present a simple ex vivo method called ‘RNA ImmunoGenic Assay’ to measure immunogenicity of IVT-mRNAs in human whole blood. Chemically modified and unmodified mRNA ... [摘要]  [摘要] mRNA疗法是治疗多种疾病的新型药物。然而,我Ñ体外转录(IVT)的mRNA触发由于人类内体和细胞质RNA传感器,但是修饰的核苷的掺入识别的免疫应答已经示出吨ö减少此类反应。牛逼herefore ,测定标志着重要的环节人体免疫系统仍然需要。这里,我们提出一个简单的离体称为“RNA方法免疫ģ ENIC测定”测量的IVT-mRNA的免疫原性小号在人全血。将化学修饰和未修饰的mRNA与转染试剂(TransIT )复合,并在人全血中共同孵育。特异性细胞因子测定(TNF- α ,INF- α ,INF- γ ,IL-6和IL-12p70的),使用的ELISA。进行qPCR分析以揭示特异性免疫途径的激活。所述RNA免疫ģ ENIC测定提供小号的简单且快速的方法来检测供体特异性-针对mRNA的治疗剂的免疫应答。

图形摘要:

RNA免疫基因测定的示意图

[背景] mRNA治疗是基因治疗的重要一类(Sahin等,2014 ;Antony等,2015 ...

Random Insertional Mutagenesis of a Serotype 2 Dengue Virus Clone
Author:
Date:
2018-08-20
[Abstract]  Protein tagging is a powerful method of investigating protein function. However, modifying positive-strand RNA virus proteins in the context of viral infection can be particularly difficult as their compact genomes and multifunctional proteins mean even small changes can inactivate or attenuate the virus. Although targeted approaches to functionally tag viral proteins have been successful, these approaches are time consuming and inefficient. A strategy that has been successfully applied to several RNA viruses is whole-genome transposon insertional mutagenesis. A library of viral genomes, each ... [摘要]  蛋白质标记是研究蛋白质功能的有效方法。然而,在病毒感染的情况下修饰正链RNA病毒蛋白可能特别困难,因为它们的紧密基因组和多功能蛋白意味着即使很小的变化也可以使病毒失活或减弱。尽管功能性标记病毒蛋白的靶向方法已经成功,但这些方法耗时且效率低。已经成功应用于几种RNA病毒的策略是全基因组转座子插入诱变。通过细胞培养中的传代选择病毒基因组文库,每个文库含有单个随机放置的小插入,并且可以使用下一代测序(NGS)鉴定插入位点。在这里,我们描述了用于登革病毒16681株血清型2的转座子诱变的方案。含有短随机放置插入物的突变登革病毒文库通过哺乳动物细胞传代,插入由有活力后代的NGS定位。该方案分为四个阶段:登革热cDNA克隆的转座子诱变,病毒基因组转染到允许细胞,分离病毒后代基因组和测序文库制备。

【背景】 ...

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 ...
[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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