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JAMA Neurol:睡眠剥夺可增加阿尔茨海默病风险

2014-06-11 佚名 丁香园

淀粉样蛋白级联假说的内容是指阿尔茨海默病(AD)最初起源于β-淀粉样(Aβ)蛋白的沉积,Aβ42蛋白是相关蛋白中最主要的成员。目前仍不清楚散发阿尔茨海默病患者中发生Aβ蛋白沉积的原因,但是这种现象被认为反映了Aβ蛋白生成和清除的失平衡。【原文下载】 流行病学调查显示了很多导致AD的潜在病因,其中有愈来愈多的证据显示睡眠不足是病因之一。机能学研究显示神经活动可增加Aβ蛋白的合成和分泌,因此清醒

淀粉样蛋白级联假说的内容是指阿尔茨海默病(AD)最初起源于β-淀粉样(Aβ)蛋白的沉积,Aβ42蛋白是相关蛋白中最主要的成员。目前仍不清楚散发阿尔茨海默病患者中发生Aβ蛋白沉积的原因,但是这种现象被认为反映了Aβ蛋白生成和清除的失平衡。【原文下载】

流行病学调查显示了很多导致AD的潜在病因,其中有愈来愈多的证据显示睡眠不足是病因之一。机能学研究显示神经活动可增加Aβ蛋白的合成和分泌,因此清醒状态(神经活动增加)可增加Aβ蛋白的生成;反之,睡眠(神经活动减少)与Aβ蛋白清除率增加和生成减少相关。

在既往研究中也确实发现,人类和啮齿动物脑脊液中Aβ蛋白水平在睡眠期比起清醒状态有着显著降低。此外,研究显示在啮齿动物中,如果清醒状态延长,可导致脑内Aβ蛋白水平增加,其沉积水平随后也同样增加。

上述研究结果提示,慢性部分睡眠剥夺导致的睡眠不足可能干扰生理性的睡眠相关脑内Aβ蛋白清除,导致持续的Aβ蛋白高浓度,并且可能导致Aβ蛋白沉积。

2014年6月2日在JAMA NEUROLOGY杂志上发表了一篇研究报告。该研究评估了健康中年男性在一晚完全睡眠剥夺(即持续清醒24小时)对脑脊液中Aβ42蛋白水平的影响。

研究者假设睡眠剥夺可导致Aβ42蛋白水平升高。因为Aβ42蛋白在Aβ蛋白空斑形成过程中起最主要作用,所以被用作本研究的主要结果参数。同时,研究者还选择了脑脊液中Aβ40蛋白、磷酸化tau蛋白(P-tau)、总tau蛋白(T-tau)作为次级结果参数;因为它们被认为是独立于Aβ蛋白起源的生物标记物,在典型AD病程晚期均会受到影响。总蛋白水平作为参照。

实验对象被随机分为一晚睡眠剥夺组(n=13)和自由睡眠组(n=13)。结果显示,一晚自由睡眠可清除6%的Aβ42蛋白,反之睡眠剥夺则可抵消这种清除效应。睡眠剥夺组晚间和晨间的Aβ42蛋白浓度较自由睡眠组显著升高,与此同时两组的脑脊液总蛋白水平未见明显差异。



研究显示,睡眠剥夺(或者清醒期延长)可干扰Aβ42蛋白的生理性晨间清除过程。研究者假设慢性睡眠剥夺可增加脑内Aβ42蛋白水平,从而增大患阿尔茨海默病的风险。

原始出处:

Ooms S1, Overeem S2, Besse K3, Rikkert MO1, Verbeek M4, Claassen JA1.Effect of 1 Night of Total Sleep Deprivation on Cerebrospinal Fluid β-Amyloid 42 in Healthy Middle-Aged Men: A Randomized Clinical Trial.JAMA Neurol. 2014 Jun 2. doi: 10.1001/jamaneurol.2014.1173. 【原文下载】

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    2016-03-29 1de7eccdm81(暂无匿称)

    学了一下,感谢

    0

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    2015-03-30 yinhl1978
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