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Acetonitrile, HiPerSolv CHROMANORM® Super gradient for HPLC

Company: VWR
Catalog#: BDH83639.400
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Mass Spectrometry-based in vitro Assay to Identify Drugs that Influence Cystine Solubility
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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; ...

Purification of N-coronafacoyl Phytotoxins from Streptomyces scabies
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Date:
2017-04-05
[Abstract]  This procedure is used for large-scale purification of N-coronafacoyl phytotoxins that are produced by the potato common scab pathogen Streptomyces scabies. The procedure employs organic extraction of S. scabies culture supernatants under alternating basic and acidic conditions in order to preferentially isolate the phytotoxin - containing carboxylic acid fraction of the supernatant. Preparative thin layer chromatography and semi-preparative reverse phase - high performance liquid chromatography are then used to further purify the individual N-coronafacoyl phytotoxins of interest. [摘要]  该方法用于大规模纯化由马铃薯常见的痂病原体耻骨链球菌sc疮产生的N, - 海胆酰基植物毒素。 该方法采用有机萃取方法。 在交替的碱性和酸性条件下培养上清液以优先分离含有上清液的含有毒素的羧酸部分。 然后使用制备型薄层色谱法和半制备型反相 - 高效液相色谱法进一步纯化所需的单独的N, - 焦油酰甲酰植物毒素。

马铃薯普通痂病是由革兰氏阳性,丝状,链霉菌属的土壤细菌引起的经济上重要的作物病。第一个描述和最好的特征是痂病引起链霉菌属(Streptomyces spp。)是具有全球分布(Bignell等人,2010)的Streptomyces scabies (syn。 S。scabiei 。目前常见的痂病治理方法包括作物轮作,灌溉和土壤熏蒸;然而,这些策略经常失败,产生不一致的结果或者环境不友好(Dees和Wanner,2012)。为了开发更好的疾病控制策略,我们必须首先了解 S使用的分子机制。 sc疮感染植物并诱发疾病症状。研究表明,S的能力。引起疾病的sc疮是由于在感染过程中产生不同作用的毒力因子。在由s生产的已知或潜在的毒力因子中。 sc疮是植物毒素的家族,被称为具有类似于植物激素茉莉酸的可能起到抑制作用的 N - 角鲨烯酰植物毒素(也称为COR-样代谢产物)病原体感染期间的植物免疫应答(Bignell等人,2010; ...

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