Liver Int: 非酒精性脂肪肝与痴呆症风险之间的关联

2022-03-19 MedSci原创 MedSci原创

痴呆症是一种因脑部伤害或疾病所导致的渐进性认知功能退化,且此退化的幅度远高于正常老化的进展。

      非酒精性脂肪肝(NAFLD)是世界上最常见的慢性肝脏疾病之一, 患病率约为25%。非酒精性脂肪肝的全球负担正在上升,而且与肥胖症和代谢性疾病的发病率增加相吻合。作为一种多系统的疾病,非酒精性脂肪肝与肝外表现密切相关,例如心血管疾病、慢性肾脏疾病、睡眠呼吸障碍和癌症等。近年来,越来越多的证据表明,非酒精性脂肪肝可能与与大脑老化有关的情况。一项研究发现,非酒精性脂肪肝与认知功能障碍和独立于心血管疾病的大脑活动减少有关。痴呆症是一种神经退行性疾病或血管性疾病,与行为、认知的恶化有关。据估计,全世界目前有5000万人患有痴呆症,预计到2050年其发病率将增加两倍。最近在小鼠身上的一项研究表明,非酒精性脂肪肝引起的肝脏炎症会诱发阿尔茨海默病的症状。鉴于肝脂肪变性是脂肪代谢异常的一种情况而大脑中的脂肪失调与痴呆症有关。因此,在这项大规模的全国性人口观察研究中,研究人员旨在调查非酒精性脂肪肝是否与痴呆症的风险增加有关。

 

      为了完成本项研究,研究人员收集了2004 年1月至2007年12月期间的4031948 名年龄在 40-69 岁的受试者,进行了一项全国性队列研究,这些受试者在 2004 年 1 月至 2007 年 12 月期间接受了韩国国民健康保险服务提供的≥2次健康检查。根据肝脂肪变性指数 (HSI),受试者被分类为非 NAFLD(HSI <30)和 NAFLD(HSI >36)。由 ICD-10 代码和处方数据定义的痴呆症。Cox 比例风险回归模型分析了痴呆症风险。

 

      研究结果显示在基线时,31.3% 的人患有 NAFLD。在 9.5 年的中位随访期间,NAFLD 组和非 NAFLD 组分别有 138,424 人和 69,982 人出现痴呆症状。在多变量调整分析(风险比 [HR],1.05;P <0.001)、竞争风险分析(HR,1.08;P <0.001)和倾向-得分匹配分析(HR,1.09;P <0.001)中,非酒精性脂肪肝均是痴呆的危险因素。NAFLD与痴呆风险之间的关联在女性中更为显着(HR,1.16;P<0.001)。与肥胖 NAFLD 受试者相比,非肥胖 NAFLD 受试者(BMI <25 kg/m2,HR,1.09;P <0.001)的相关性更强。

图:非酒精性脂肪肝与痴呆症危险因素

 

      本项韩国的全国性研究发现,NAFLD 与痴呆风险增加有关。这种关联在女性和非肥胖 NAFLD 受试者中尤为突出。

 

 

原始出处:

Gi-Ae Kim. Et al. Association between Non-alcoholic Fatty Liver Disease and the Risk of Dementia: A Nationwide Cohort Study. Liver International.2022.

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    2022-08-11 Boyinsh
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    2022-03-19 neuro.Dr

    老年性痴呆,未来还是希望借助神经电生理吧,也许更为有效!

    0

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