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首页> 外文期刊>Analytical and bioanalytical chemistry >Liquid chromatography-mass spectrometry with triazole-bonded stationary phase for N-methyl- d-aspartate receptor-related amino acids: development and application in microdialysis studies
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Liquid chromatography-mass spectrometry with triazole-bonded stationary phase for N-methyl- d-aspartate receptor-related amino acids: development and application in microdialysis studies

机译:液相色谱 - 质谱与三唑键合的固定相对于<强调型=“斜体”> N - 甲基 - <重量型=“小型”> D -Asparate受体相关的氨基酸:发育 和微透性研究中的应用

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摘要

AbstractWe aimed to monitor changes in the levels of amino acid neurotransmitters or neuromodulators simultaneously at the synaptic clefts of experimental animals. We developed a method for the simultaneous determination of the levels of amino acids, such asd-Ser, Gly, andl-Glu, which were involved in neurotransmission via theN-methyl-d-aspartate (NMDA) receptor, and other protein-constituted amino acids in a rat brain microdialysis (MD) sample. We used a liquid chromatography-mass spectrometry (LC-MS)/MS device equipped with a triazole-bonded column. The determination was achieved without using stable isotope-labeled compounds. We instead used suitable amino acid analogues as internal standards (ISs). We examined various analyte-IS combinations to improve reproducibility. We found a positive correlation (r?=?0.720, **p?S-methyl-l-cysteine, which was an inhibitor of the amino acid transporter Asc-1, caused some amino acid level changes in the rat brain. The proposed LC-MS/MS method can be applied in vivo to study the effects of novel therapeutic agents with monitoring the levels of amino acid neuromodulators, such as Glu, Gly, GABA, andd-Ser, in the brain.
机译:<![cdata [ <标题>抽象 ara id =“par1”>我们旨在监测氨基酸水平的变化在实验动物的突触谱系中同时进行神经递质或神经调节剂。我们开发了一种同时测定氨基酸水平的方法,例如<重点型=“小型胶囊”> D -ser,GLY和<重点型=“小型=”Smallcaps“> L - 通过<重点型=“斜体”> n -methyl- <重量型=“小型”> D -Aspactate(NMDA)受体,以及其他蛋白质构成的大鼠脑微透析(MD)样品中的氨基酸。我们使用配备有三唑键合塔的液相色谱 - 质谱(LC-MS)/ MS装置。在不使用稳定的同位素标记的化合物的情况下达到的测定。我们使用合适的氨基酸类似物作为内部标准(ISS)。我们检查了各种分析物 - 是提高再现性的组合。我们发现了一个正相关(<重点类型=“斜体”> R ?=?0.720,*** <强调类型=“斜体”> P ?<?0.0001)之间的相对标准偏差(% )面积比和分析物 - 是保留时间差异。使用该方法,我们能够使用与分析物结构相似的ISS准确地分析MD样品中的痕量氨基酸。此外,我们观察到,<强调型=“斜体”> S -methyl- <重量型=“Smallcaps”> L -cysteine,其是氨基酸转运蛋白的抑制剂ASC-1,导致大脑脑中的一些氨基酸水平变化。所提出的LC-MS / MS方法可以在体内应用新型治疗剂与监测氨基酸神经调节剂的水平,例如Glu,Gly,GABA和<重点类型=“小型=”小型=“小型”> D -ser,在大脑中。 ara id =“par2”outputmedium =“在线”> <图Catego

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