Alzheimer's & Dementia:老年人晚年的体力活动与脑组织突触完整性标记有关

2022-01-23 影像小生 MedSci原创

该研究第一次证明了生活方式行为、PA和人类脑组织突触完整性标记之间的联系

身体活动(PA)被广泛推荐用于与年龄相关的大脑健康的研究,但它的神经生物学还不是很清楚。动物模型表明PA具有突触性。

Kaitlin Casaletto等在Alzheimer's & Dementia杂志发表文章,研究了PA和老年人突触完整性标志物之间的关系。

来自Rush记忆和衰老项目的受试对象完成了年度活动监测(平均访视次数= 3.5±2.4)和死后评估。对脑组织突触前蛋白(突触素、突触totagmin-1、囊泡相关膜蛋白、合成蛋白、复合物I和复合物II)和神经病理学进行分析。模型检测了老年PA(平均每次访问)和时间特异性PA(尸检时间)与突触蛋白之间的关系。

年平均体力活动的增加与死亡时脑组织中较高的突触蛋白相关,复合物- II除外。

在时间上采取的措施越接近(即活动监测到死亡之间的时间),身体活动和脑组织突触蛋白水平之间的关系就越强。

更大的晚年PA与更高的突触前蛋白水平相关(0.14 <β<0.20),复合物-II除外(β = 0.08)。相关关系独立于病理,具有时间特异性;在2年内完成脑组织测量的参与者显示出最大的PA-突触蛋白关联(0.32<β<0.38)。PA和突触前蛋白之间的关系在脑区取样具有可比性。

该研究第一次证明了生活方式行为、PA和人类脑组织突触完整性标记之间的联系。PA可能有助于建立突触健康,即使是在晚期(如大脑储备),这种关联独立于病理,是一个潜在的可塑性过程,可能需要持续一段时间。

原文出处

Late-life physical activity relates to brain tissue synaptic integrity markers in older adults

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    2022-01-24 yahu

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