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Nature:年轻血液可改善老年痴呆?也许确实可行!

2017-11-05 心湖 转化医学网

在我们的印象里,一些科幻剧、鬼神剧里经常会出现老年妖精或吸血鬼等,通过吸收年轻血液来使自己重新焕发青春,而近日Nature报道的一项研究似乎在暗示我们,也许这确实可行。

导读

在我们的印象里,一些科幻剧、鬼神剧里经常会出现老年妖精或吸血鬼等,通过吸收年轻血液来使自己重新焕发青春,而近日Nature报道的一项研究似乎在暗示我们,也许这确实可行。

据一个受控但仍有争议的小型研究报告表明,给患者输入年轻人的血液用于治疗老年痴呆的操作似乎是安全的。同时,研究表明这种治疗方式可以改善阿尔兹海默症患者的日常生活能力。
 
有潜力,但不能过度解读

研究人员强调,这些结论只是建立在18个人的研究上,因此这只是探索这种治疗方式的第一步。加利福尼亚斯坦福大学神经病学家Tony Wyss-Coray强调:“这真的是一个非常小的试验,结果不应该被过度解读”。
 
结果表明,该输血这种治疗操作是安全的,甚至表明可以提高痴呆症患者日常生活的能力,如购物、做饭等。该团队计划在11月4日在马萨诸塞州波士顿举行的第十届阿尔茨海默病临床试验会议上展示该研究成果。
 
可提升患者生活能力

实验中,Wyss-Coray及他的同事测试了年龄介于54到86岁之间的患有轻度至中度阿尔兹海默症的人群。研究人员每周给18名受试者进行注射,并持续四周。他们同时接受生理盐水安慰剂以及从18-30岁的献血者那里获得的血浆(除去红细胞的血液)。在研究期间,该小组对受试者的认知技能、情绪以及独立生活的能力进行了监测和评估。
 
该研究未发现严重的不良反应。虽然研究表明输血对患者的认知没有显著影响,但是评估日常生活能力的两种不同的测试都显示出显著的改善。
 
这项其实试验源于早期的“parabiosis”试验,在这个试验中两只啮齿动物的血液系统通过外科手术连接在一起,以了解当一只动物中循环的分子进入另一动物时会发生什么变化。
 
Wyss-Coray的大量小鼠研究结果促使了临床试验1,现在计划进行第二次更大的试验,试验将使用去除了许多蛋白质和其他分子的血浆,主要因为他在小鼠实验中发现,使用这种血浆可能比使用全血浆更有效。
 
更深入的研究有待进行

输血试验是有争议的,因为血浆中的活性分子可能会导致所谓的未知影响。
 
加利福尼亚大学伯克利分校的神经病学家Irina Conboy和她的同事进行了大量的parabiosis实验,将已经进行基因匹配的年轻老鼠和年轻老鼠缝合在一起。她发现,可以明显观察到年轻的血液恢复了年老老鼠的组织,如心脏和脑部。但她表示,这些影响可能是通过存在在血液中的各种因素的复杂协调来实现的,在进入临床之前需要更充分的了解这些因素。
 
她说:“这个实验的科学依据似乎是不存在的。 年轻血液对认知的影响并没有被一个独立的研究小组所重复,并且从未在老年痴呆症模型中做过测试。”她表示老年人经常接受外来血浆可能是不安全的,因为他们的超激活免疫系统可能导致自身免疫性或炎性疾病。
 
美国公司已经开始行动

最后,Wyss-Coray强调:“阿尔兹海默症患者等不及发现确切的治疗方式。”这是阿尔茨海默氏症研究中首个不依据尚有理论的治疗方法,但尚且谈不上是一种治疗方法。
 
最后值得注意的是用于此目的的输血不需要美国食品和药物管理局的批准,一些美国公司已经在高价收取年轻人的血液。
 
原始出处:

Joseph M. Castellano, Kira I. Mosher,et al.Human umbilical cord plasma proteins revitalize hippocampal function in aged mice.Nature.19 April 2017 544, 488–492

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    2018-08-25 一叶知秋
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    2017-11-06 惠映实验室

    学习了.谢谢.

    0

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    2017-11-06 1ddf0692m34(暂无匿称)

    学习了.涨知识

    0

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    2017-11-06 明月清辉

    谢谢分享.学习

    0

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    2017-11-06 jihuaijun1112

    学习学习学习学习

    0

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    2017-11-05 131****2916

    不错的文章值得推荐

    0

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