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Microscope slides

Company: VWR
Catalog#: 16004-422
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Efficient Transient Gene Knock-down in Tobacco Plants Using Carbon Nanocarriers
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Date:
2021-01-05
[Abstract]  Gene knock-down in plants is a useful approach to study genotype-phenotype relationships, render disease resistance to crops, and enable efficient biosynthesis of molecules in plants. Small interfering RNA (siRNA)-mediated gene silencing is one of the most common ways to achieve gene knock-down in plants. Traditionally, siRNA is delivered into intact plant cells by coding the siRNA sequences into DNA vectors, which are then delivered through viral and/or bacterial methods. In this protocol, we provide an alternative direct delivery method of siRNA molecules into intact plant cells for efficient transient gene knock-down in model tobacco plant, Nicotiana benthamiana, leaves. Our approach uses one dimensional carbon-based nanomaterials, single-walled carbon nanotubes (SWNTs), to ... [摘要]  [摘要]植物基因敲低是研究基因型与表型关系,提高作物对病害的抵抗力以及实现植物分子高效生物合成的有用方法。小干扰RNA(siRNA)介导的基因沉默是在植物中实现基因敲低的最常见方法之一。传统上,通过将siRNA序列编码到DNA载体中,将siRNA传递到完整的植物细胞中,然后通过病毒和/或细菌方法传递。在这个协议中,我们提供的siRNA分子的替代直接递送方法为完整的植物细胞的高效瞬时根Ë击倒在模型的烟草植物,烟草本塞姆氏烟草,叶子。我们的方法使用一维碳基纳米材料,单壁碳纳米管(SWNTs)来传递siRNA,而不依赖于病毒/细菌的传递。我们方法的独特优势在于:i )不需要对siRNA序列进行DNA编码; ii)与非生物方法相比,这种非生物方法可在更广泛的植物物种中起作用,并且iii)使用非生物递送时,调节并发症更少方法,其中基因沉默是瞬时的,而无需对植物基因组进行永久性修饰。

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[背景技术[ 0002 ]在1990年代初,植物研究人员研究矮牵牛花的着色发现了通过RNA干扰(RNAi)引起的基因沉默(Van der ...

In vitro Cultivation and Visualization of Malaria Liver Stages in Primary Simian Hepatocytes
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Date:
2020-08-20
[Abstract]  Human liver is the primary and obligatory site for malaria infection where sporozoites invade host hepatocytes. Malaria hepatic stages are asymptomatic and represent an attractive target for development of anti-malarial interventions and vaccines. However, owing to lack of robust and reproducible in vitro culture system, it is difficult to target and study this imperative malaria liver stage. Here, we describe a procedure that allow cultivation and visualization of malaria hepatic stages including dormant hypnozoites using primary simian hepatocytes. This method enables sensitive and quantitative assessment of different hepatic stages in vitro.
[摘要]  [摘要 ] 人肝是疟疾感染的主要场所,子孢子侵入宿主肝细胞。疟疾的肝分期是无症状的,并且是开发抗疟疾干预措施和疫苗的有吸引力的目标。然而,由于缺乏健壮和可重现的体外培养系统,因此难以靶向和研究这种必不可少的疟疾肝阶段。在这里,我们描述了一种程序,该程序允许使用原代猿猴肝细胞培养和可视化疟疾肝阶段,包括休眠的次生子。这种方法可以对体外不同肝期进行灵敏和定量的评价。

[背景 ] 疟疾是女性的叮咬后传染给人类按蚊蚊子注入子孢子进入血流,其迁移到肝脏和侵入宿主的肝细胞。在肝细胞内部,子孢子进行第一轮无性繁殖并转化为多核肝裂殖体。完全成熟的肝脏裂殖体破裂并释放裂殖子,该裂殖子进入血流并感染红细胞(RBC)。在红细胞内部,寄生虫进行了第二轮无性繁殖,血液阶段的完成最终引起了与疟疾有关的临床症状。例外地,在所有疟原虫物种中,间日疟原虫,食蟹猴和卵圆形疟原虫的子孢子可产生休眠的肝形式,称为次生子孢子(Prudêncioet al。,2011)。

间日疟原虫是第二大主要疟原虫,在包括热带,亚热带和温带气候在内的所有疟疾物种中地理分布更广。消除间日疟原虫疟疾的最大挑战是由休眠的次生子激活引起的周期性疟疾复发,这些休眠的次生子启动了肝阶段增殖的发作(Wells ...

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