Am J Psychiatry:焦虑:阿兹海默症的先兆?

2018-01-16 佚名 中国生物技术网

一项新研究表明,β淀粉样蛋白水平升高和焦虑症状的恶化之间存在关联。该发现支持了这一种假说,即神经精神病学症状或许是老年人阿尔兹海默症的早期表现。

一项新研究表明,β淀粉样蛋白水平升高和焦虑症状的恶化之间存在关联。该发现支持了这一种假说,即神经精神病学症状或许是老年人阿尔兹海默症的早期表现。

阿尔兹海默症是一种神经退行性疾病,它会导致认知功能的衰退,使人失去日常生活自理能力。过去的研究表明,抑郁和其他精神病学症状也许是阿尔兹海默症在临床前期的征兆。在此期间,纤维状淀粉样蛋白和病理性tau的脑沉积物累积在患者的大脑中。这一过程可能发生在患者出现轻微的认知衰退十年之前。哈佛医院附属布里格姆妇女医院的研究人员,对认知能力正常的老年人大脑中的β淀粉样蛋白,和在一段时间中有抑郁症状情况之间的关联进行了研究。这项发表在《美国精神病学期刊》上的研究表明,β淀粉样蛋白水平升高与焦虑症状加剧之间存在关联。该结果支持了精神病学症状是阿尔兹海默症早期征兆的理论。

布里格姆妇女医院的老年精神病学专家Nancy Donovan说:“我们并没有只关注抑郁这个整体,还关注了具体特定的症状,比如焦虑。抑郁的其他症状还包括悲伤和无兴趣等,与这些症状相比,焦虑更能表明认知能力衰退之前的阿尔兹海默症症状。如果未来的研究证实焦虑是阿尔兹海默症的早期指标,我们不但可以更早地为患者确诊,还能够更早地治疗这种疾病,甚至是延缓或阻止这种疾病的进程。”因为焦虑症状在老年人中很普遍,严重的焦虑症状很可能和其他预示高风险阿尔兹海默症的遗传、生物学和临床指标一样有用。

研究人员的数据来自于哈佛大脑老化研究中心,这是一项对老年人进行的观测性研究,目的是确定早期阿尔兹海默症中的神经生物学和临床变化。这些受测者包括270名社区老年男性和女性,他们认知能力正常,年龄在62至90岁之间,没有精神类疾病。他们还都接受了大脑成像扫描,该技术常常用于治疗阿尔兹海默症,并且每年接受一次老年抑郁测量表(GDS)的评估,共有30个条目,该评估用于确定老年人的抑郁情况。

研究团队计算了GDS部分,还分别计算出三种抑郁症状单独的分数:无兴趣、烦躁不安、焦虑。他们总共计算了5年的分数。

研究团队发现,在认知正常的老年人中,β淀粉样蛋白水平升高与焦虑症状严重程度的上升之间存在关联。这个结果表明,恶化的焦虑-抑郁症状很可能是淀粉样β蛋白水平上升的早期征兆,从而也就导致了阿尔兹海默症的风险。该研究还为这样一种假设提供了支持,即新出现的神经精神病学症状可能代表临床前的阿尔兹海默症征兆。

Donovan指出,在未来还需要长时间的追踪研究来确定抑郁症状恶化是否会引起阿尔兹海默症的临床抑郁症和痴呆阶段。

原始出处:

Donovan NJ,et al.,Longitudinal Association of Amyloid Beta and Anxious-Depressive Symptoms in Cognitively Normal Older Adults.Am J Psychiatry. 2018 Jan 12:appiajp201717040442.

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    2018-03-30 1221dec5m93暂无昵称

    学习了

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    2018-01-20 我系吖前

    good

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    2018-01-16 1e0e5a1fm42(暂无匿称)

    henhao

    0

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    2018-01-16 明天jing

    焦虑是当年年轻人的共同问题,需要认真对待。

    0

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    2018-01-16 有备才能无患

    一项新研究表明.β淀粉样蛋白水平升高和焦虑症状的恶化之间存在关联.该发现支持了这一种假说.即神经精神病学症状或许是老年人阿尔兹海默症的早期表现.

    0

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