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Proteinase K Solution (20 mg/ml)

蛋白酶K溶液(20mg / mL)

Company: Thermo Fisher Scientific
Catalog#: AM2546
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Preparation of a Bacteriophage T4-based Prokaryotic-eukaryotic Hybrid Viral Vector for Delivery of Large Cargos of Genes and Proteins into Human Cells
Author:
Date:
2020-04-05
[Abstract]  A viral vector that can safely and efficiently deliver large and diverse molecular cargos into cells is the holy grail of curing many human diseases. Adeno-associated virus (AAV) has been extensively used but has a very small capacity. The prokaryotic virus T4 has a large capacity but lacks natural mechanisms to enter mammalian cells. Here, we created a hybrid vector by combining T4 and AAV into one nanoparticle that possesses the advantages of both. The small 25 nm AAV particles are attached to the large 120 nm x 86 nm T4 head through avidin-biotin cross-bridges using the phage decoration proteins Soc (small outer capsid protein) and Hoc (highly antigenic outer capsid protein). AAV thus “piggy-backed” on T4 capsid, by virtue of its natural ability to enter many types of human cells ... [摘要]  [摘要 ] 一种病毒载体,可以安全有效地将大量多样的分子货物运送到细胞中 是治愈许多人类疾病的圣杯。腺伴随病毒(AAV)已被广泛使用,但容量很小。T4原核病毒容量大,但缺乏进入哺乳动物细胞的天然机制。在这里,我们通过将T4和AAV结合到一个具有两者优势的纳米颗粒中,创建了一种杂交载体。使用噬菌体修饰蛋白Soc(小的外衣壳蛋白)和Hoc(高度抗原化的外衣壳蛋白),通过亲和素-生物素交叉桥将25 nm的AAV小颗粒连接到120 nm x 86 nm的大T4头上。因此,AAV凭借其固有的进入多种类型人体细胞的自然能力,可以“背负”于T4衣壳上,从而有效地充当了“驱动器”,以运送与T4头相关的大型货物。这种独特的T4-AAV杂交载体方法可为将来开发新型疗法铺平道路。

[背景 ] 已经有新的和有效的递送载体能够运输基因和蛋白质的大货物进入人类细胞,以刺激生产治疗性生物分子的和/或修复的细胞和遗传缺陷的迫切需要。这样的载体将允许将快速出现的技术(例如CRISPR,CAR T细胞等)转化为用于大规模应用以及个性化医学的疗法(Stewart 等,2016)。

将具有不同特性的纳米粒子组装到杂化复合物中是开发新型功能材料的有力策略,因为这些杂化复合物显示出集体和协作的属性,其中某些属性可能与单个粒子所显示的属性不同(Ghosh 等人,2012; ...

In situ Hybridization (ISH) in Preparasitic and Parasitic Stages of the Plant-parasitic Nematode Meloidogyne spp.
Author:
Date:
2018-03-20
[Abstract]  The spatio-temporal expression pattern of a gene provides important indications to better understand its biological function. In situ hybridization (ISH) uses a labeled complementary single-stranded RNA or DNA probe to localize gene transcripts in a whole organism, a whole organ or a section of tissue. We adapted the ISH technique to the plant parasite Meloidogyne spp. (root-knot nematode) to visualize RNAs both in free-living preparasitic juveniles and in parasitic stages settled in the plant tissues. We describe each step of the probe synthesis, digoxigenin (DIG) labeling, nematode extraction from plant tissue, and ISH procedure. [摘要]  基因的时空表达模式为更好地理解其生物学功能提供了重要的指示。 原位杂交(ISH)使用标记的互补单链RNA或DNA探针来定位整个生物体,整个器官或一部分组织中的基因转录物。 我们将ISH技术应用于植物寄生虫

【背景】到目前为止,植物寄生性线虫的稳定转化尚未成功。 ISH能够在整个装载的Meloidogyne spp中分析体内时空基因表达。线虫。这些根结线虫在土壤中以微小蚓状幼虫(J2)形式孵化并感染宿主植物根部。 J2s穿透根部并迁移到根部维管柱状细胞。幼虫定居在根部,发育成J3和J4寄生幼鱼,诱导分化专化饲养细胞。线虫最终发育成梨形雌性,将在根表面释放数百个卵。在这里,我们报告了一个详细的协议来检测准备性整体安装J2s和寄生阶段中的单个RNA分子。寄生虫阶段的ISH需要在感染根部提取线虫前一天采取额外的程序。我们描述了在线虫整个组织中使用地高辛(DIG)标记的cDNA探针检测转录物。

Terminal Deoxynucleotidyl Transferase Mediated Production of Labeled Probes for Single-molecule FISH or RNA Capture
Author:
Date:
2018-03-05
[Abstract]  Arrays of short, singly-labeled ssDNA oligonucleotides enable in situ hybridization with single molecule sensitivity and efficient transcript specific RNA capture. Here, we describe a simple, enzymatic protocol that can be carried out using basic laboratory equipment to convert arrays of PCR oligos into smFISH and RAP probesets in a quantitative, cost-efficient and flexible way. [摘要]  短的,单标记的ssDNA寡核苷酸阵列使得能够与单分子灵敏度和有效的转录物特异性RNA捕获进行原位杂交。 在这里,我们描述了一个简单的酶促协议,可以使用基本的实验室设备将PCR寡核苷酸阵列以定量,成本高效和灵活的方式转换为smFISH和RAP探针组。

【背景】合成来源的多个单标记的短寡核苷酸的使用极大地改进了对特异性转录物的高特异性和单分子灵敏度的检测(Femino等人,1998; Raj等人。,2008)。这种探针分子与经典使用的长核酸探针相比具有改进的穿透性并且需要更温和的杂交条件,从而更好地保存标本的结构(例如,Little等人 >,2015,Gaspar 等,2017a)。由于在该设计中多个寡核苷酸 - 通常24-96-靶向相同转录物的不同部分,因此在非特异性背景上在特异性靶分子上发生信号累积,这与由长的多标记探针产生的相等信号相反(Raj ,2008)。此外,由于单个短探针的标记是定量的 - 与长探针的随机标记相反 - ...

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