Biol Psychiat:颠覆性发现:精神疾病早期的大脑异常信号

2017-10-20 佚名 大话精神

发表在Biological Psychiatry上的一项最新研究发现,经历第一次精神疾病的年轻人,其大脑中谷氨酸和甘氨酸水平升高,这是精神障碍患者甘氨酸水平的首次测量。

发表在Biological Psychiatry上的一项最新研究发现,经历第一次精神疾病的年轻人,其大脑中谷氨酸和甘氨酸水平升高,这是精神障碍患者甘氨酸水平的首次测量。

NMDA受体(N-methyl-D-asparticacid receptor)即为N-甲基-D-天冬氨酸受体,是离子型谷氨酸受体的一个亚型,分子结构复杂,药理学性质独特,不仅在神经系统发育过程中发挥重要的生理作用,而且对神经元回路的形成亦起着关键的作用,有资料表明NMDA受体是学习和记忆过程中一类至关重要的受体。

精神障碍(如精神分裂症和双相情感障碍)中的异常脑活动被认为是部分地受到NMDA受体功能受损的干扰。谷氨酸和甘氨酸激活这些受体,这是对于诸如学习和记忆等过程的脑信号的重要介质。哈佛医学院的?ngür博士认为,这些发现可作为旨在恢复NMDA受体功能的未来疗法发展的标志。

人类大脑中甘氨酸的可靠检测非常具有挑战性,常规技术中的重叠信号容易干扰到检测结果。该研究中,哈佛医学院的研究人员应用了一种称为MR光谱的脑成像技术来抑制干扰信号,并捕捉到了隐藏的甘氨酸信号。

与50例健康对照组相比,46例首发精神疾病的患者的甘氨酸水平较高。这些研究结果表明,甘氨酸异常可能在精神障碍的早期阶段发挥作用。研究人员还检测到了患者的谷氨酸水平升高,谷氨酸和甘氨酸的升高会使精神病患者的NMDA受体受到异常刺激。

增加的甘氨酸水平与研究者们的预期相反——研究人员实际上尝试提高患者的甘氨酸水平来弥补表现不佳的NMDA受体。疾病早期患者具有较高水平的甘氨酸,这一新发现可能有助于解释为什么甘氨酸补充剂不能像研究人员所希望的那样有效。

生物精神病学杂志编辑John Krystal博士说:“这项研究支持精神分裂症生物学中不同发育阶段的概念,这些阶段可能需要不同的治疗方法。

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    2022-12-31 ms2000000027193216 来自山东省

    #期刊论坛#大脑异常

    0

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    2018-06-12 sunylz
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    2017-10-21 swfzhanggui

    非常好.学习了.谢谢

    0

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    2017-10-21 sunfeifeiyang

    学习

    0

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