Aging:世界阿尔茨海默病日:定期喝茶,或可预防阿尔茨海默症

2019-09-21 徐悦 生物探索

近日,新加坡国立大学(NSU)的研究人员领导的一项研究发现:习惯性定期饮茶对大脑组织有积极影响,并提高了大脑功能和结构连接的效率。该研究发表在《Aging》杂志上。

公元前2700年,神农氏尝百草时便有了关于茶的记载。如今,茶叶的消费已经风靡全球,在中国饮茶更是一种传统的饮食文化,每个地方都有着各自独特的喝茶习惯。

越来越多的研究表明,茶的消费有益于人类健康,包括情绪改善、预防血管疾病、降低癌症发病率和死亡率。对于茶的研究大多是从抗癌、防衰老以及缓解心血管疾病等角度入手。

近日,新加坡国立大学(NSU)的研究人员领导的一项研究发现:习惯性定期饮茶对大脑组织有积极影响,并提高了大脑功能和结构连接的效率。该研究发表在《Aging》杂志上。

定期饮茶的老人大脑连接效率更高

研究人员招募了36名60岁以上的老年人,对他们的大脑区域进行磁共振成像检查并且记录他们的生活方式和心理健康数据。该研究利用多模态成像数据(功能和结构成像),在全球和区域范围内全面研究了饮茶对大脑连接的影响,并提供了第一个令人信服的证据。

结果发现:那些每周至少饮茶四次,不管是绿茶、乌龙茶还是红茶,坚持饮用25年以上的老人的认知能力更为出色。这表明:定期喝茶对大脑结构中与年龄相关的认知衰退相关区域有着保护作用。

饮茶对大脑结构的积极贡献使网络组织更有效率。喝茶对预防(减缓)或改善认知能力下降是有效的,饮茶可能是一种简单的生活方式选择,有益于大脑健康。

虽然此前也有研究表明,每天喝茶能够降低老人认知能力下降的风险,但饮茶对大脑影响的具体机制人们并不是十分了解。因此,研究人员进一步探讨了饮茶对大脑网络之间连接的影响。结果显示:与不饮茶的人相比,定期喝茶的老年人的大脑区域的结构节点效率有着明显的差异。

当然,该文也有一定局限性,比如样本量偏少,除本文所考虑的因素外,可能还有很多因素会影响到该文的结论等。另外,人类的认知表现和大脑组织结构之间的关系错综复杂,还需要更多的研究才能更好的理解这其中的关系。

饮茶还能预防阿尔茨海默症?

这并不是第一篇关于饮茶与认知的研究,早在2015年该研究团队便开始着手确定喝茶与认知衰退之间的联系。当时,研究人员收集了957名55岁以上的中国成年人的数据,包括喝茶多少、茶叶消费频率以及消费的茶叶类型。每隔2年,研究人员对参试者进行标准化评估以评价他们的认知功能。

与鲜少喝茶的成年人相比,经常喝茶的人认知衰退的风险降低了50%。此外,在携带阿尔茨海默症风险基因APoE e4的成年人中,经常饮茶的人认知衰退风险降低86%。也就是说,虽然目前我们并没有有效治疗阿尔茨海默症的方式,但我们可以通过饮茶这一简单的方式来预防阿尔茨海默症。

原始出处:
Junhua Li, Rafael Romero-Garcia, John Suckling, et al. Habitual tea drinking modulates brain efficiency: evidence from brain connectivity evaluation. Aging. Mar 2019.

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    2019-09-23 hbwxf
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    2019-09-21 Dr Z

    神奇的东方树叶

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