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Flaviogeranin, a new neuroprotective compound from Streptomyces sp.

机译:Flaviogeranin,一种来自链霉菌属的新神经保护化合物。

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Cerebral ischemic disorders are one of the main causes of death. In brain ischemia, blood flow disruptions limit the supply of oxygen and glucose to neurons, initiating excitotoxic events. These include activation of glutamate receptors and release of excess glutamate inducing neuron depolarization and significant increase of intracellular calcium, which activates multiple intracellular death pathways. Accumulation of extracellular glutamate also inhibits cystine-glutamate exchanger, resulting in depletion of the intracellular antioxidant glutathione. Under such conditions, reactive oxygen species are generated and implicated in neuronal cell death. In this study, microbial metabolites were screened to find neuroprotective agents against glutamate toxicity. C6 rat glioma cells undergo cell death when exposed to 100 mм glutamate for 24 h. Thus, they provide a good model for evaluating neuroprotective activity against glutamate toxicity. Our screening using C6 cells resulted in the isolation of a new active compound designated as flaviogeranin (Figure 1) from Streptomyces sp. RAC226.
机译:脑缺血性疾病是死亡的主要原因之一。在脑缺血中,血流中断会限制神经元的氧气和葡萄糖供应,从而引发兴奋性中毒事件。这些包括激活谷氨酸受体和释放过量谷氨酸诱导神经元去极化和细胞内钙的显着增加,从而激活多个细胞内死亡途径。细胞外谷氨酸的积累也抑制胱氨酸-谷氨酸交换剂,导致细胞内抗氧化剂谷胱甘肽的消耗。在这种条件下,会产生活性氧,并与神经元细胞死亡有关。在这项研究中,对微生物代谢产物进行了筛选,以发现针对谷氨酸毒性的神经保护剂。当暴露于100mм谷氨酸24小时后,C6大鼠神经胶质瘤细胞会经历细胞死亡。因此,它们为评估针对谷氨酸毒性的神经保护活性提供了良好的模型。我们使用C6细胞进行的筛选导致从链霉菌属物种中分离出了一种新的活性化合物,称为黄病毒香精(图1)。 RAC226。

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