JAMA Neuro:主动脉硬化程度与脑淀粉样蛋白-β和Tau蛋白沉积负担的关系

2022-06-12 MedSci原创 MedSci原创

主动脉硬化与阿尔茨海默病和相关痴呆症的临床特征有关,可能是疾病预防的一个可调节的目标。

主动脉硬化与阿尔茨海默病和相关痴呆症的临床特征有关,可能是疾病预防的一个可调节的目标。为了评估无痴呆症的中老年人大脑中主动脉硬化程度与脑淀粉样蛋白-β和Tau蛋白沉积负担的关系,来自美国多所大学的学者开展了相关研究,结果发表在JAMA Neurology杂志上。

这项横断面研究的样本来自弗雷明汉心脏研究第三代队列的检查3(N=3171;2016-2019),其中3092人成功接受了综合血液动力学评估。在补充访问中(2015-2021年),代表血管风险的270名无痴呆症的参与者的子集也接受了SPECT扫描。最后的样本量为257人。

使用动脉测压仪评估主动脉僵硬度的三种测量方法(颈-股脉搏波速度、中心脉搏压力[CPP]和前向波幅[FWA])。分别使用11C-Pittsburgh B和18F-flortaucipirSPECT扫描描记器评估全脑淀粉样β斑块和局部tau蛋白负担。

257名参与者的平均(SD)年龄为54(8)岁,126人为女性(49%)。在多变量模型中,较高的CPP(β每增加SD=0.17;95%CI,0.00-0.35;P=0.045)和FWA(β每增加SD=0.16;95%CI,0.00-0.31;P=0.04)与较大的内丘脑Tau负担有关。在类似的模型中,较高的CPP(β每SD=0.19;95%CI,0.02-0.36;P=.03)和FWA(β每SD=0.17;95%CI,0.01-0.32;P=.03)与较大的tau负担有关。

主动脉僵硬度测量与杏仁核、下颞部、楔前叶tau负担或全脑淀粉样β斑块无关。在年龄较大的参与者(≥60岁)中,内侧和外侧tau结果的关联更为突出。例如,在分层分析中,所有主动脉僵硬度较高水平(β每SD=0.40-0.92;P=.001-.02)与老年参与者中较高的内丘脑tau负担有关,但与年轻参与者无关。

在这项横断面研究中,中央血管血流动力学的异常与特定脑区较高的tau负担有关。研究结果表明,主动脉僵硬度可能是预防tau相关病变的一个可能的独立目标。

 

参考文献

Association of Aortic Stiffness and Pressure Pulsatility With Global Amyloid-β and Regional Tau Burden Among Framingham Heart Study Participants Without Dementia. JAMA Neurol. Published online June 06, 2022. doi:10.1001/jamaneurol.2022.1261

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    2022-06-10 hb2008ye
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    2022-06-09 肿瘤克星

    JAMA上文章都是顶级的,谢谢梅斯及时上新

    0

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与年龄相关的动脉硬化和大脑健康状况不佳关联的机制仍不清楚,可能涉及脑血流量(CBF)稳态。Circulation杂志发表的一项最新研究评估了主动脉硬化与老年人静息CBF和脑血管反应性(CVR)的关系。

JAHA:高血压患者左室扭转与主动脉硬化的关系!

由此可见,高血压患者左室基底部扭转与主动脉硬化增加及舒张功能改善有关。这些变化可能弥补主动脉硬化对左室舒张的有害影响。

J Hypertens:过量饮酒相关的健康状况可以预测10年以上的主动脉硬化!

在随访10年以上的黑人南非人中,与过度饮酒相关的健康状况,包括城市环境、升高的血糖和较低的体重指数可以独立于年龄和血压来预测大动脉僵硬度。这一观察提示了需要针对酒精过度使用的紧急公共卫生战略。

Circ Cardiovasc Imaging:肺动脉高压儿童主动脉明显硬化!

由此可见,肺动脉高压儿童患者升主动脉硬化程度有明显地增加,这与主要肺动脉的扩张程度密切相关。我研究人员推测的主要肺动脉扩张可能在收缩期全主动脉扩张限制中充分发挥了重要作用,调节左心室性能和影响肺动脉高压儿童患者的全身血流动力学。