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L-Cystine

Company: Sigma-Aldrich
Catalog#: C8755
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Structural Analysis of Bordetella pertussis Biofilms by Confocal Laser Scanning Microscopy
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Date:
2018-08-05
[Abstract]  Biofilms are sessile communities of microbial cells embedded in a self-produced or host-derived exopolymeric matrix. Biofilms can both be beneficial or detrimental depending on the surface. Compared to their planktonic counterparts, biofilm cells display enhanced resistance to killing by environmental threats, chemicals, antimicrobials and host immune defenses. When in biofilms, the microbial cells interact with each other and with the surface to develop architecturally complex multi-dimensional structures. Numerous imaging techniques and tools are currently available for architectural analyses of biofilm communities. This allows examination of biofilm development through acquisition of three-dimensional images that can render structural features of the sessile community. A frequently ... [摘要]  生物膜是嵌入自生或宿主衍生的外聚合物基质中的微生物细胞的固着群落。根据表面,生物膜可以是有益的或有害的。与浮游生物相比,生物膜细胞表现出更强的抗环境威胁,化学物质,抗菌药物和宿主免疫防御能力。当处于生物膜中时,微生物细胞彼此相互作用并与表面相互作用以形成结构复杂的多维结构。目前,许多成像技术和工具可用于生物膜群落的建筑分析。这允许通过获取可以呈现无柄群落的结构特征的三维图像来检查生物膜的发展。经常使用的工具是共聚焦激光扫描显微镜。我们提出了一个详细的协议,以生长,观察和分析呼吸道人类病原体,百日咳博德特氏菌的生物膜在空间和时间。

【背景】百日咳博德特氏菌(Bordetella pertussis)是上呼吸道的专性人类病原体,引起百日咳或百日咳(Mooi,2010; Dorji et al。,2018)。 B的生物膜。百日咳在各种人造表面上以及静态,摇动和流体流动条件下形成(Mishra et al。,2005; Sloan et al。,2007 ; Serra et al。,2011)。对这些生物膜的显微评估表明,这种细菌产生不规则形状的微集落,由流体通道分隔,嵌入由细胞外DNA(eDNA),蛋白质和多糖组成的外聚合物基质中(Parise et al。,2007; Sloan et al。,2007; Serra et al。,2008; ...

Mass Spectrometry-based in vitro Assay to Identify Drugs that Influence Cystine Solubility
Author:
Date:
2017-07-20
[Abstract]  Cystinuria is a rare genetic disorder characterized by recurrent, painful kidney stones, primarily composed of cystine, the dimer of the amino acid cysteine (Sumorok and Goldfarb, 2013). Using a mouse model of cystinuria, we have recently shown that administration of drugs that increase cystine solubility in the urine can be a novel therapeutic strategy for the clinical management of the disease (Zee et al., 2017). There is a large unmet need in the field for developing new drugs for cystinuria. To that end, here we describe a simple in vitro cystine solubility assay that is amenable for screening compounds to identify potential drugs that may influence cystine solubility. The assay includes preparing a supersaturated solution of cystine, incubating this solution with ... [摘要]  胱尿蛋白尿是一种罕见的遗传性疾病,其特征在于复发性疼痛的肾结石,主要由胱氨酸,氨基酸半胱氨酸的二聚体组成(Sumorok和Goldfarb,2013)。 使用小鼠模型的胱氨酸尿症,我们最近显示,在尿液中增加胱氨酸溶解度的药物的施用可能是临床治疗疾病的新型治疗策略(Zee等人,2017)。 在该领域需要开发用于开发新药用于胱氨酸尿症的很大需求。 为此,我们在此介绍一种简单的体外胱氨酸溶解度测定法,可用于筛选化合物以鉴定可能影响胱氨酸溶解度的潜在药物。 该测定包括制备胱氨酸过饱和溶液,将该溶液与选择的药物孵育,最后使用高压液相色谱 - 串联质谱(HPLC-MS / MS)定量在各种条件下沉淀的胱氨酸的量。
【背景】胱硫酸尿症是一种肾结石疾病,其特征在于肾脏近端小管中的胱氨酸转运蛋白的遗传缺陷,导致尿液中的胱氨酸负荷大量增加,其作为肾结石沉淀(Sumorok和Goldfarb,2013)。虽然分类为罕见的遗传疾病(约1 / 15,000个人)(Milliner和Murphy,1993; ...

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