STM:西酞普兰或有助预防早老性痴呆

2014-05-19 林小春 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》上报告说

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约翰·奇里托在一份声明中说:“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:


Sheline YI1, West T2, Yarasheski K3, Swarm R4, Jasielec MS5, Fisher JR6, Ficker WD6, Yan P6, Xiong C7, Frederiksen C8, Grzelak MV6, Chott R3, Bateman RJ9, Morris JC10, Mintun MA11, Lee JM9, Cirrito JR9.An Antidepressant Decreases CSF Aβ Production in Healthy Individuals and in Transgenic AD Mice.Sci Transl Med. 2014 May 14;6(236):236re4. doi: 10.1126/scitranslmed.3008169.



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