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STM:一种抗抑郁药或有助预防早老性痴呆

2014-05-16 佚名 新华网

美国的一项研究显示,常用抗抑郁药西酞普兰可减少一种脑蛋白,该蛋白被认为是造成早老性痴呆的主要“元凶”之一。但科学家也表示,目前尚无足够证据促使他们建议服用这种药来预防早老性痴呆。 早老性痴呆又称阿尔茨海默氏症,是常见的痴呆类型。患者大脑中贝塔淀粉样蛋白出现异常堆积,形成斑块,导致记忆力下降。目前,这种病尚无有效疗法。 华盛顿大学与宾夕法尼亚大学的研究人员 14 日在美国期刊《科学-转化医学》上报告

美国的一项研究显示,常用抗抑郁药西酞普兰可减少一种脑蛋白,该蛋白被认为是造成早老性痴呆的主要“元凶”之一。但科学家也表示,目前尚无足够证据促使他们建议服用这种药来预防早老性痴呆。

早老性痴呆又称阿尔茨海默氏症,是常见的痴呆类型。患者大脑中贝塔淀粉样蛋白出现异常堆积,形成斑块,导致记忆力下降。目前,这种病尚无有效疗法。

华盛顿大学与宾夕法尼亚大学的研究人员 14 日在美国期刊《科学-转化医学》上报告说,他们给患早老性痴呆的小鼠服用西酞普兰,发现服药 24 小时后,小鼠脑中产生的贝塔淀粉样蛋白减少约 25%。此外,小鼠脑中已有的该蛋白斑块停止增生,新出现的斑块数量减少约 78%。

研究人员又给 24 名 18 岁至 50 岁的志愿者服用西酞普兰。这些志愿者都是认知能力没有受损、也未出现抑郁的健康人士。24 小时后抽取的脊髓液样本表明,这些参与者脑中产生的贝塔淀粉样蛋白减少了 37%。

这项研究的负责人、华盛顿大学助理教授 John Cirrito在一份声明中说:“抗抑郁药(西酞普兰)似乎能显著减少脑中产生的贝塔淀粉样蛋白,这一发现令人激动。但服用抗抑郁药也有风险和副作用,现在还不值得冒这种风险,除非我们有更加确定的证据表明,这些药能减缓或阻止人类早老性痴呆的形成。”

原始出处:

Yvette I. Sheline, Tim West, Kevin Yarasheski, Robert Swarm, Mateusz S. Jasielec, Jonathan R. Fisher, Whitney D. Ficker, Ping Yan, Chengjie Xiong, Christine Frederiksen, Monica V. Grzelak, Robert Chott, Randall J. Bateman, John C. Morris, Mark A. Mintun, Jin-Moo Lee, and John R. Cirrito. An Antidepressant Decreases CSF Aβ Production in Healthy Individuals and in Transgenic AD Mice. Sci Transl Med., 14 May 2014;

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    2015-04-05 wetgdt
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    2015-03-29 gdsun
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    2014-05-17 niclo

    希望能为AD点亮一点曙光!

    0

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4月7日,记者从上海交大医学院获悉,该院药理学和化学生物学系高小玲课题组设计并率先构建了仿生脂蛋白纳米药物,可用于降低脑内β淀粉样蛋白沉积,延缓阿尔茨海默氏症的疾病进程。美国化学会《ACS纳米》杂志发表了该成果,并刊登了国际知名纳米医学专家、以色列特拉维夫大学教授Dan Peer为此撰写的述评文章。 阿尔茨海默氏症是一种最常见的老年性痴呆型疾病。科学家已证明阿尔茨海默氏症的核心致病物质是β淀粉样

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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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