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Author:
Date:
2018-01-20
[Abstract] D-serine is an atypical amino acid present in the mammalian body (most amino acids in the mammalian body are L-isomers) that is mostly known in neuroscience for its role as a co-agonist controlling the N-methyl D-aspartate receptor (NMDAR). D-serine levels are decreased in patients with schizophrenia and this is thought to mediate, at least in part, the hypofunction of NMDARs that is central to the glutamate hypothesis for the etiology of this neuropsychiatric disorder. D-serine detection was first established using high performance liquid chromatography, a costly and complex technique that requires high levels of expertise. But with the increasing interest in this unconventional amino acid, there is an increasing need for easier, cheaper and more accessible detection methods. Here we ...
[摘要] D-丝氨酸是存在于哺乳动物体内的非典型氨基酸（哺乳动物体内的大部分氨基酸是L-异构体），其在神经科学中主要是作为控制N-甲基D-天冬氨酸受体的共激动剂的作用而已知的NMDA受体）。精神分裂症患者的D-丝氨酸水平降低，这被认为至少部分地介导了NMDARs功能减退，这种谷氨酸假说对于这种神经精神障碍的病因至关重要。 D-丝氨酸检测首先使用高效液相色谱法建立，这是一种昂贵且复杂的技术，需要高水平的专业知识。但随着对这种非常规氨基酸的兴趣日益增加，人们越来越需要更容易，更便宜和更容易获得的检测方法。在这里，我们描述了我们在最近的出版物（Papouin等人，2017b）中采用的安培法，基于生物传感器的方法。它可以对新鲜组织的D-丝氨酸水平进行可靠的测量，如急性脑切片，浓度高于100 nM，技术要求最低。
【背景】N-甲基D-天冬氨酸受体（NMDAR）是脑，脊髓和周围神经系统如肠神经元中神经递质谷氨酸的受体。在肾小管细胞和软骨细胞中也有发现。除谷氨酸外，NMDAR的激活需要在专用结合位点上结合共激动剂（Johnson和Ascher，1987; Kleckner和Dingledine，1988）。非常规氨基酸D-丝氨酸是神经系统众多区域中NMDAR的内源性共激动剂（参见Papouin等人，2017a）。在肝脏和肾脏中也可以发现其丰富的降解和排泄（Montesinos ...
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