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Neurology:阿尔茨海默病脑脊液生物标记物可预测“非认知性”预后

2013-12-23 lilyfighting dxy

阿尔茨海默病的生物标记物可用于检测“临床前”阿尔茨海默病,而脑脊液中阿尔茨海默病生物标记物(β-淀粉样蛋白42[Aβ42],tau蛋白,181位苏氨酸磷酸化的tau蛋白[ptau181],tau/ Aβ42比值与ptau181/Aβ42比值)是否能在基线时认知功能正常的人群中预测非认知性预后的下降,尚不清楚。为此,来自华盛顿大学医学院Knight阿尔茨海默病研究中心的Catherine M. Ro

阿尔茨海默病的生物标记物可用于检测“临床前”阿尔茨海默病,而脑脊液中阿尔茨海默病生物标记物(β-淀粉样蛋白42[Aβ42],tau蛋白,181位苏氨酸磷酸化的tau蛋白[ptau181],tau/ Aβ42比值与ptau181/Aβ42比值)是否能在基线时认知功能正常的人群中预测非认知性预后的下降,尚不清楚。为此,来自华盛顿大学医学院Knight阿尔茨海默病研究中心的Catherine M. Roe哲学博士与其同事进行了一项研究,将其结果在线发表在2013年11月8日的《神经病学》(Neurology)杂志上。研究发现阿尔茨海默病脑脊液生物标记物可预测“非认知性”预后。【原文下载】

本研究在1年中纳入了430名捐献了脑脊液的参与者,均鉴定为认知功能正常,且年龄不小于50岁,对其纵向数据进行分析。作者使用混合线性模型检测是否生物标记物基线值能够预测将来功能(日常生活中器械使用活动)、体重、行为及心境的下降。作者也对临床痴呆评定盒子与最小精神状态检测评分进行评估。

结果显示,每个生物标记物的异常水平均与随时间行为症状(p < 0.035)及心境症状(p < 0.012)损害更大相关,也与日常生活中独立活动更困难(p < 0.012)有关。然而,生物标记物水平并不与随时间的体重改变相关(p > 0.115)。正如期望的一样,异常的生物标记物值也预测了最小精神状态检测(p < 0.041)与临床痴呆评定盒子(p < 0.001)分值改变更快。

研究发现,认知功能正常人群中脑脊液生物标记物与一些非认知性阿尔茨海默病研究症状的未来下降相关联,但并非全部。作者也指出尚需要更多研究来明确这些发现在其他样本中的普遍性。


原文出处:
 
Roe CM, Fagan AM, Grant EA, Holtzman DM, Morris JC.CSF biomarkers of Alzheimer disease: "Noncognitive" outcomes.Neurology 2013 Dec 81 23 :2028-31【原文下载】


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    2014-05-12 yinhl1978
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    2014-04-14 wjywjy
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Neurology:研究发现脉压与阿尔茨海默病生物标记物相关

Fig. 脉压与AD生物学标记物(Aβ1-42, P-tau, P-tau/Aβ1-42)的关联性 血压与认知功能降低及阿尔茨海默病痴呆的关系已得到广泛研究,却少有研究探索血压与认知障碍之间的生物学机制。脉压随年龄呈线性升高,可作为血管衰老的指征之一。脉压已被发现可增加阿尔茨海默病性痴呆的发生风险,但这种关联是完全源于其继发的亚临床性脑血管疾病,或是与阿尔茨海默病的病理生理学存在直接关系

规范轻度认知障碍的诊断与治疗

痴呆是指较严重的、持续的认知障碍,通常起病隐匿,进展缓慢,病程较长。临床上以缓慢出现的智力减退为主要特征,伴有不同程度的人格改变。随着我国人口老龄化的加剧,痴呆患者为社会和家庭带来的经济和照料负担不容忽视。因此,重视痴呆防治、早期诊断、早期干预十分重要。在此,我们选取被认为介于正常老化与轻度阿尔茨海默病之间的过渡状态的轻度认知障碍(MCI),以及迅速进展性痴呆(RPD),分别邀请专家进行介绍。

JAMA Neurol:早期脑结构改变与阿尔茨海默病遗传易感性相关

美国一项研究表明,早期脑结构改变与阿尔茨海默病遗传易感性相关,并有可能成为阿尔茨海默病预防治疗的靶位。论文11月25日在线发表于《美国医学会杂志·神经病学》(JAMA Neurol)。 此项研究共纳入162例典型发育的2~25个月婴儿,并在睡眠时实施了脑MRI检查。受试婴儿均无阿尔茨海默病以及其它神经或精神疾病家族史。在载脂蛋白E(APOE)ε4携带者和非携带者中对白质髓鞘水部

NRR:脑缺血与阿尔茨海默病在发病机制上联系密切

阿尔茨海默症患者脑中老年斑的主要成分β淀粉样蛋白及脑缺血再灌注损伤均可导致脑组织神经细胞死亡,并致认知功能受损。最近有研究表明,脑缺血与阿尔茨海默病在发病机制上联系密切。 为此,清华大学生命科学学院宋波博士所在课题组进行了一项关于“Amyloid beta-peptide worsens cognitive impairment following cerebral ischemia-reper

Brain:尸检研究证实高同型半胱氨酸血症可增加阿尔茨海默病及痴呆风险

阿尔茨海默病的患病人群数量逐年增加,血浆总同型半胱氨酸的升高可增加痴呆/阿尔茨海默病的风险,但其潜在的病理生理学机制尚不清楚。为此,来自瑞典卡罗林斯卡学院神经生物系老年研究中心的Babak Hooshmand及其同事进行了一项人群尸检研究,研究结果发表在2013年9月第136期的《脑》(Brain)杂志上。作者发现≥85岁的成人同型半胱氨酸升高可能可导致阿尔茨海默型病理改变的增加,且在脑血管病变者

黄金武:全球每7秒就有一人被确诊阿尔茨海默病

如果你的父母近来总是忘东忘西,眼前的事也记不住,过去的某件事总是念念不忘;刚锁上门出去,没走几步又怀疑自己没锁门;见到熟悉的老朋友,半天叫不出名字;上街买东西,算不清该给多少钱……这说明他们可能要患上阿尔茨海默病了,你应该带父母到医院做一个专科检查,别让阿尔茨海默病过早地影响老人的生活。 9月21日是“世界老年痴呆日”。老年性痴呆,多发生于中年或老年的早期,症状是短期记忆丧失,认识能力退化,

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