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WST-1 cell proliferation reagent

WST-1 cell proliferation reagent

公司名称: Roche Diagnostics
产品编号: 05015944001
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Cytotoxicity Assay for Detection of Cereulide Produced by Emetic Bacillus cereus
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2013-01-20
[Abstract]  The emetic subgroup of Bacillus cereus strains produces cereulide, a dodecadepsipeptide (1.2 kDa), which is the causative agent of food poisonings. Cereulide is synthesized by a nonribosomal peptide synthetase (NRPS), the Ces-NRPS (Ehling-Schulz et al., 2006). Cereulide is a cyclic and lipophilic potassium ionophor structurally related to the macrolide antibiotic valinomycin. Both substances act on mitochondria by depolarization and uncoupling of ATP synthesis, and this effect (mitochondrial swelling) is used to quantify cereulide in a HEp-2 cell based viability assay.
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[摘要]  蜡状芽孢杆菌菌株的催吐亚组产生作为食物中毒的致病因子的十二缩酚酸肽(1.2kDa)的cereulide。谷胱甘肽通过非核糖体肽合成酶(NRPS),Ces-NRPS(Ehling-Schulz等人,2006)合成。脑苷脂是与大环内酯类抗生素缬氨霉素结构相关的环状和亲脂性钾离子体。这两种物质通过ATP合成的去极化和解偶联作用于线粒体,并且该效应(线粒体肿胀)用于在基于HEp-2细胞的活力测定中量化脑苷脂。
在该方案中,根据Finlay等人(1999)发表的试验进行了修改,缬氨霉素被用作离子体诱导的细胞毒性的参考标准,因为纯化的脑苷脂不是商业上的可用。该测定法已经用于定量来自不同B的脑梗的量。 cereus突变体(Lücking等人,2009; Frenzel等人,2012),并且估计从人类(人工)污染的食物中提取的脑苷脂水平> B。 cereus (Frenzel ,2011)。

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