Cell Metab:锻炼促进大脑健康的分子机制

2013-10-14 佚名 生物谷

很多研究都表明运动对大脑有益,近日,来自哈佛医学院的研究者通过研究鉴别出了一种名为鸢尾素(irisin)的分子可以在耐力锻炼期间从个体大脑中产生,而且该物质神经保护的作用;研究人员可以人工提高血液中鸢尾素的水平从而激活和学习记忆相关的基因进行表达,这项研究刊登于国际著名杂志Cell Metabolism上。【原文下载】 该项研究或许可以帮助研究者以该分子为基础开发新型

很多研究都表明运动对大脑有益,近日,来自哈佛医学院的研究者通过研究鉴别出了一种名为鸢尾素(irisin)的分子可以在耐力锻炼期间从个体大脑中产生,而且该物质神经保护的作用;研究人员可以人工提高血液中鸢尾素的水平从而激活和学习记忆相关的基因进行表达,这项研究刊登于国际著名杂志Cell Metabolism上。【原文下载】

该项研究或许可以帮助研究者以该分子为基础开发新型药物,来帮助治疗神经变性疾病及改善老龄个体的认知能力。

人们都知道锻炼可以增强认知能力以及减轻神经变性疾病的症状,比如抑郁、中风或者阿尔兹海默氏症的症状;但是隐藏在疾病背后的分子机制我们并不清楚,在疾病过程中的一种重要的分子被认为是脑源性神经营养因子(BDNF)。

这项研究中,研究者利用小鼠模型进行实验,通过研究发现一种名为FNDC5的分子以及其分解产物鸢尾素,在处于耐力锻炼过程中的个体大脑中水平会明显上升,而且BDNF的表达也会增强;通过遗传修饰的小鼠,即其大脑中具有较低水平的鸢尾素,其通常BDNF的水平较低。

研究者发现,在循环过程中鸢尾素水平的升高可以使得该分子穿过血脑屏障,从而增加BDNF的表达,并且激活和认知相关的基因的表达。

研究者Spiegelman表示,我们的研究结果显示,FNDC5/鸢尾素具有控制大脑中神经保护途径的能力,下一步研究者计划开发鸢尾素蛋白质的稳定形式,随后通过注射到小鼠体内来研究,这或许可以增强大脑的天然抗衰老信号机制。


原文检索:

Christiane D. Wrann, James P. White, John Salogiannnis, Dina Laznik-Bogoslavski, Jun Wu, Di Ma, Jiandie D. Lin, Michael E. Greenberg, Bruce M. Spiegelman. Exercise Induces Hippocampal BDNF through a PGC-1α/FNDC5 Pathway.Cell Metabolism (Available online) 10 October 2013 .【原文下载】

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    2013-10-26 一闲
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    2014-01-16 guojianrong
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    2014-08-15 维他命
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