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Formvar®-coated copper grids

Company: Electron Microscopy Sciences
Catalog#: FCF300-CU-SC
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Preparation and Characterization of Ginger Lipid-derived Nanoparticles for Colon-targeted siRNA Delivery
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Date:
2020-07-20
[Abstract]  Synthetic nanoparticle-based drug delivery system is widely known for its ability to increase the efficacy and specificity of loaded drugs, but it often suffers from relatively higher immunotoxicity and higher costs as compared to traditional drug formulations. Contrarily, plant-derived nanoparticles appear to be free from these limitations of synthetic nanoparticles; they are naturally occurring biocompatible vesicles that do not generate immunotoxicity and are easy to obtain. Additionally, lipids isolated from plant-derived nanoparticles have shown the capability of assembling themselves to spherical nano-sized liposomal particles. Herein, we employ lipids extracted from ginger-derived nanoparticles and load them with therapeutic siRNA (CD98-siRNA) to create CD98-siRNA/ginger-lipid ... [摘要]  [摘要 ]基于合成纳米颗粒的药物递送系统以其增加所载药物的功效和特异性的能力而广为人知,但是与传统药物制剂相比,它经常遭受相对较高的免疫毒性和较高的成本。相反,植物来源的纳米粒子似乎不受合成纳米粒子的这些限制;它们是天然存在的生物相容性囊泡,不会产生免疫毒性并且易于获得。另外,从植物来源的纳米颗粒分离的脂质已显示出将其自身组装成球形纳米尺寸脂质体颗粒的能力。在本文中,我们采用从生姜纳米颗粒中提取的脂质,并用治疗性siRNA(CD98-siRNA)加载脂质,以创建CD98-siRNA /生姜脂质纳米颗粒。CD98-siRNA /姜脂脂质纳米颗粒的表征显示它们呈球形,直径约为189.5 nm。纳米颗粒的表面ζ电势在-18.1至-18.4mV之间变化。此外,在最近的研究中,CD98-siRNA /姜脂纳米颗粒在右旋糖酐硫酸钠(DSS)诱发的结肠炎小鼠模型中显示出特定的结肠靶向能力和出色的抗炎功效。

[背景 ] 小干扰RNA(siRN As)是一种有前途的治疗剂,可以通过沉默异常上调的信使RNA(mRNA)来治疗各种疾病(Nikam and Gore ,2018)。尽管siRNA的有效性,安全有效地将siRNA递送至治疗靶标仍然是一项艰巨的任务(Tatiparti et al ...

Isolation and Characterization of Exosomes from Mouse Feces
Author:
Date:
2020-04-20
[Abstract]  Exosomes secreted by colonic epithelial cells are present in feces and contain valuable epigenetic information, such as miRNAs, proteins, and metabolites. An in-depth study of this information is conducive to the diagnosis or treatment of relevant diseases. A crucial prerequisite of such a study is to establish an efficient isolation method, through which we can obtain a relatively more significant amount of exosomes from feces. This protocol is designed to effectively isolate a large number of exosomes from contaminants and other particles in feces by a combined method with fast filtration and sucrose density gradient ultracentrifugation. Exosomes generated by this method are suitable for further RNA, protein, and lipid analysis. [摘要]  [摘要] 外来体分泌的结肠上皮细胞是否存在,在粪便和包含有价值的表观遗传信息,例如miRNA,蛋白质和代谢。一个在深入研究这个信息,有利于诊断和治疗相关疾病的一种重要前提这项研究的目的是建立一种有效的分离方法,通过该方法我们可以从粪便中获得相对大量的外泌体。该方案旨在通过组合方法有效地从粪便中的污染物和其他颗粒中分离出大量外泌体通过快速过滤和蔗糖密度梯度超速离心。这种方法产生的外泌体适用于进一步的RNA,蛋白质和脂质分析。

[背景] 结肠外泌体由结肠上皮细胞分泌到管腔中,并沿大肠转运并存在于粪便中。这些外泌体的脂质双层结构可防止复杂条件下封装的生物分子(如miRNA)的降解(由于粪便)(古贺等人,2011 ; 邓等人,2013 )。该保护功能外体是非常有用的,因为这些受保护的内容可以用来诊断疾病,如溃疡性结肠炎和结肠癌症。重要的是,重新设计的外泌体也可以有效地将治疗性生物分子递送至某些特定的疾病靶标,而不会对宿主产生免疫毒性(Sun 等人,2010; Johnsen 等人,2014; Wang 等人,2016; Kim和Kim,2018 )。

迄今为止,已成功地从血液(Wu 等人,2017 ),尿液(Knepper和Pisitkun,2007; Motamedinia 等人,2016 ),培养细胞(Yeo 等人,2013 ...

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