Cell Rep:全身麻醉药不仅仅是让你入睡,还对大脑连接薄弱的人有影响!

2018-01-10 白木清水译自 medicalxpress 来宝网

对于全身麻醉药作用于大脑的复杂方式的新理解最终可能导致改善手术的药物。目前还不清楚全身麻醉是如何做到的,尽管它是全世界最常见的医疗程序之一。

对于全身麻醉药作用于大脑的复杂方式的新理解最终可能导致改善手术的药物。目前还不清楚全身麻醉是如何做到的,尽管它是全世界最常见的医疗程序之一。

昆士兰大学的研究员说,他的研究小组翻新了以前对全身麻醉剂对大脑的作用的理解,发现这些药物的作用远不止于诱导睡眠。

“我们研究了异丙酚——一种最常见的麻醉药物在手术中使用的效果表现在突触释放,”科学家说。

突触释放是神经元或神经细胞相互交流的机制:

“我们从先前的研究中得知,包括异丙酚在内的麻醉药对大脑的睡眠系统起作用,就像安眠药一样,”范·斯温德伦副教授说。

但我们的新研究发现,异丙酚也会破坏突触前机制,可能会影响整个大脑神经元之间的交流,而这与睡眠的方式不同。这一点上,它和安眠药很不一样。

这一发现揭示了麻醉学对大脑的影响:

“我们发现异丙酚限制了神经元突触所需的关键蛋白(syntaxin1A)的运动。这种限制导致大脑神经元之间的交流减少。

副教授van Swinderen说,这一发现有助于理解一般的麻醉剂是如何起作用的,并可以解释为什么人们在手术后会感到头晕和迷惑。

他说:“我们认为,对突触连接的广泛破坏广泛抑制了大脑的沟通途径,是使手术成为可能的原因,同时像异丙酚这样有效的麻醉剂确实能让你入睡。”

“这一发现对大脑连接薄弱的人有影响,比如大脑仍在发育的儿童,以及患有阿尔茨海默氏症或帕金森氏症的人。”

他说:“人们从来都不明白为什么一般的麻醉有时对年轻人和老年人都有问题。这种新发现的机制可能是其中一个原因。

副教授van Swinderen说,还需要进行更多的研究,以确定一般的麻醉是否对这些大脑连接薄弱人群产生持久的影响。

“研究对这些模型系统(如老鼠和苍蝇)的影响,可以让我们通过控制相关机制来解决这些问题,而这是我们人类无法做到的。”

原始出处:Adekunle T. Bademosi, James Steeves, Shanker Karunanithi, et al. Trapping of Syntaxin1a in Presynaptic Nanoclusters by a Clinically Relevant General Anesthetic. Cell Reports. 9 January 2018

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    2018-03-18 维他命
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    2018-01-12 1e1b8538m79(暂无匿称)

    不错的文章不错的文章

    0

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    2018-01-12 jihuaijun1112

    学习学习学习

    0

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    2018-01-11 hhh678

    henhao

    0

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