Nature Commun:研究人员实现安全开关血脑屏障

2018-08-06 鲁亦 中国科学报

《自然—通讯》近日发表的一项一期临床试验,用无创、可逆的方式打开了5名阿尔茨海默氏症患者的血脑屏障。结果显示,操作流程很安全,但对聚焦超声改善阿尔茨海默氏症临床症状的功效尚无定论。


《自然—通讯》近日发表的一项一期临床试验,用无创、可逆的方式打开了5名阿尔茨海默氏症患者的血脑屏障。结果显示,操作流程很安全,但对聚焦超声改善阿尔茨海默氏症临床症状的功效尚无定论。

阿尔茨海默氏症俗称老年痴呆症,以大脑认知功能进行性丧失为特征。根据国际阿尔茨海默氏症协会统计,目前全球共有约4800万名患者。中国目前约有600万阿尔茨海默氏症患者,主要发病人群为老年人。目前尚无有效治疗手段让阿尔茨海默氏症病人痊愈。

研究人员指出,血脑屏障会阻碍治疗药物到达脑部,而聚焦超声联合微泡技术可以有效开放血脑屏障,清除阿尔茨海默氏症动物模型脑中的淀粉样蛋白。此外,聚焦超声还能通过植入装置作用于脑瘤患者。

加拿大多伦多桑尼布鲁克健康科学中心的Nir Lipsman及同事运用无创装置对5名轻到中度阿尔茨海默氏症患者(3名男性、两名女性)右侧大脑额叶的淀粉样蛋白聚集区域进行聚焦超声辐照。结果显示,这一操作能快速、可逆地开放5位患者的血脑屏障,并且不会出现显著的不良反应。不过,患者的淀粉样蛋白成像标记和认知功能均未检测到明显的临床变化。

研究人员表示,结果显示该操作流程很安全,但能否有效清除淀粉样蛋白并改善认知功能仍需大规模研究加以证实。

原始出处:

Nir Lipsman, et al.Blood–brain barrier opening in Alzheimer’s disease using MR-guided focused ultrasound.Nature Communications .volume 9, Article number: 2336 (2018) 

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    2019-04-27 liye789132251
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    2018-09-15 liuli5079
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    2018-08-07 胡一

    有更详细的介绍这项技术吗?

    0

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    2018-08-07 哈哈869

    学习了

    0

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    2018-08-06 kafei

    学习了谢谢

    0