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10% SDS Solution, 250 ml

10%SDS溶液

Company: Bio-Rad Laboratories
Catalog#: 1610416
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Conjugation of Duplexed siRNN Oligonucleotides with DD-HyNic Peptides for Cellular Delivery of RNAi Triggers
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Date:
2016-04-05
[Abstract]  Despite the great promise that short interfering RNA (siRNA) induced RNAi responses hold as a therapeutic modality, due to their size (~15 kDa) and high negative charge (Bumcrot et al., 2006), siRNAs have no bioavailability and require a delivery agent to enter cells (Figure 1). TAT peptide transduction domain (PTD) has been developed as an agent that mediates cellular delivery of macromolecular therapeutics that otherwise lack bioavailability, making it a tantalizing candidate for siRNA delivery (Farkhani et al., 2014). Unfortunately, when conjugated to TAT PTD, the presence of 40 negative phosphodiester backbone charges on siRNA neutralizes the cationic PTD resulting in aggregation and poor cellular delivery (Meade and Dowdy, 2007). In light of this, we synthesized a ... [摘要]  尽管由于它们的大小(〜15kDa)和高负电荷(Bumcrot等人,2006),短干扰RNA(siRNA)诱导的RNAi反应保持作为治疗模式的巨大希望,siRNA没有生物利用度,需要递送剂进入细胞(图1)。 TAT肽转导结构域(PTD)已经被开发为介导大分子治疗剂的细胞递送的药剂,否则其缺乏生物利用度,使其成为siRNA递送的诱人候选物(Farkhani等人,2014)。不幸的是,当缀合到TAT PTD时,siRNA上40个负磷酸二酯主链电荷的存在中和了导致聚集和差的细胞递送的阳离子PTD(Meade和Dowdy,2007)。鉴于此,我们合成了称为siRibo核中性的中性RNAi触发物,用于与TAT PTD缀合(Meade等人,2014)。简言之,带负电荷的磷酸二酯主链通过具有生物可逆磷酸三酯保护基团的合成来中和,其通过细胞质限制性硫酯酶的作用特异性地转化为细胞内的带电磷酸二酯键,产生可诱导RNAi应答的野生型siRNA。在这里我们描述了与TAT PTD递送结构域(DD)HyNic肽的siRNN寡核苷酸的缀合和细胞递送。

Preparation of Pneumococcal Proteins for Western Blot Analysis
Author:
Date:
2013-07-05
[Abstract]  This protocol was developed in a study aimed to determine the cellular localization of the lysin of pneumococcal phage SV1 (Frias et al., 2013). We obtained proteins from the surface of Streptococcus pneumoniae by elution with choline or those secreted to the medium. The analysis by Western blot of these fractions allowed us to demonstrate that the phage lysin localizes to the cell wall, associating with choline residues in the teichoic acids. Hence, protein extracts can be used to determine the localization of uncharacterized proteins and can also be useful for other biochemical analyses such as protein identification. This protocol can be easily adapted to different pneumococcal strains and growth conditions and it is well suited to isolate other proteins of interest. [摘要]  该方案是在旨在确定肺炎球菌噬菌体SV1的溶素的细胞定位的研究中开发的(Frias等人,2013)。 我们通过用胆碱或分泌到培养基的那些洗脱从肺炎链球菌的表面获得蛋白质。 通过这些级分的Western印迹分析允许我们证明噬菌体溶素定位于细胞壁,与磷壁酸中的胆碱残基相关。 因此,蛋白质提取物可用于确定未表征蛋白质的定位,并且还可用于其他生物化学分析,例如蛋白质鉴定。 该方案可以容易地适应于不同的肺炎球菌菌株和生长条件,并且其非常适合于分离其他感兴趣的蛋白质。

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