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JAMA Neurol:老年人淀粉样蛋白与阿尔茨海默病神经退行性保护因子的研究

2017-04-06 zhangfan MedSci原创

影响淀粉样蛋白和AD型神经退行性疾病的风险因素是不同的

淀粉样变性和神经退行一起被视为阿尔茨海默氏病的病理生理学(ADP)症状,但影响淀粉样蛋白和AD模式神经退行性疾病的因素可能是相当不同的,并且有相当多数的高龄老人并无明显的ADP症状。

研究人员近日就淀粉样蛋白和AD型神经退行性疾病的共用或独立因素进行研究并验证"例外者"假说的准确性,该假说认为某些无显着的ADP症状的老年人是因为具有特殊的淀粉样蛋白和神经退行性疾病保护因素。

研究招募了942名70岁以上的老人,对其进行磁共振成像和匹兹堡复合B-正电子发射断层扫描。研究评估的风险因素包括人口基数,APOE基因,智力因素,中年风险因素(体力活动,肥胖,吸烟,糖尿病高血压和血脂异常),晚期心脏病和代谢情况。采用多元线性回归模型,以确定共同和独立的淀粉样蛋白和AD模式神经退行性疾病保护因素,并对超过85岁以上的高龄老人进行单独的保护因素分析。

研究参与老人包括423名妇女(45%),平均年龄79.7岁(SD 5.9)。研究发现,除了人口统计学和APOE基因型,中年血脂异常与淀粉样蛋白沉积有关;除智力以外,肥胖,吸烟,糖尿病高血压,心脏和代谢条件与 AD模式神经退行性疾病相关;对于85岁以上亚组老人的分析发现没有特别明显的无ADP症状影响因素。

研究发现,影响淀粉样蛋白和AD型神经退行性疾病的风险因素是不同的。无ADP症状的老人可能是在整个生命周期多种因素的共同结果,值得进一步调查。

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    2017-10-30 yinhl1978
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