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Cell Rep:跑步延长寿命,又有新证据

2016-10-25 佚名 生物探索

10月11日,发表在Cell Reports上的一篇题为“Voluntary Running Triggers VGF-Mediated Oligodendrogenesis to Prolong the Lifespan of Snf2h-Null Ataxic Mice”的研究证明,大脑损伤的小鼠通过跑步能够触发一种分子的产生。这一分子能够修复大脑组织,延长小鼠的寿命。研究者们希望,基于这一发

10月11日,发表在Cell Reports上的一篇题为“Voluntary Running Triggers VGF-Mediated Oligodendrogenesis to Prolong the Lifespan of Snf2h-Null Ataxic Mice”的研究证明,大脑损伤的小鼠通过跑步能够触发一种分子的产生。这一分子能够修复大脑组织,延长小鼠的寿命。研究者们希望,基于这一发现能够开发出针对某些神经退行性疾病的创新疗法。

具体来说,这项新研究发现,在特定的小鼠模型中(Snf2h失活引发运动失调的小鼠),跑步对大脑健康有着显著的有益影响。这些小鼠具有特别小的小脑。由于这种缺陷,这些特别的小鼠很难保持平衡,寿命仅有25-40天。

研究中,科学家们通过在笼子中安装转轮,让一部分小鼠有跑步的机会。令人惊讶的是,这些能够跑步的小鼠寿命超过了12个月(相当于正常的小鼠寿命)。

此外,这些跑步小鼠(running mice)体重更重,平衡感更强。但如果小鼠跑步的机会被“夺走”,这些好的变化会被逆转。一旦轮子被移走,之前的症状又会回来,小鼠的寿命会再次缩短。

研究还发现,跑步小鼠和休息小鼠(resting mice)的神经系统有明显的差异。前者小脑神经元的髓磷脂(myelin)增加了。这是一种白色的、基于脂质的物质,能够发挥保护和绝缘的作用。

在发现髓鞘形成(myelination)增加后,研究小组开始寻找背后的分子机制。为此,他们调查了两类小鼠的基因表达差异。结果发现,跑步带来的大脑保护和寿命延长作用与神经生长因子VGF有关。

VGF是肌肉和大脑在运动过程中释放的一种分子。它似乎具有抗抑郁作用,能使人在运动时感觉良好。通过将VGF蛋白引入到不运动的小鼠体内,可以起到与跑步类似的效果——小脑损伤区域获得了更多绝缘保护,疾病症状也相应减少。

加拿大渥太华大学的 David J. Picketts博士是这一研究的通讯作者。他说:“很明显,VGF对大脑损伤区域的愈合非常重要。我们需要开展进一步的研究,验证这一分子能否帮助治疗多发性硬化症和其它神经退行性疾病。”

原始出处:

Alvarez-Saavedra M1, De Repentigny Y2, Yang D3, O'Meara RW4, Yan K2, Hashem LE4, Racacho L5, Ioshikhes I3, Bulman DE6, Parks RJ7, Kothary R4, Picketts DJ8.Alvarez-Saavedra M1, De Repentigny Y2, Yang D3, O'Meara RW4, Yan K2, Hashem LE4, Racacho L5, Ioshikhes I3, Bulman DE6, Parks RJ7, Kothary R4, Picketts DJ8.Voluntary Running Triggers VGF-Mediated Oligodendrogenesis to Prolong the Lifespan of Snf2h-Null Ataxic Mice.Cell Rep. 2016 Oct 11

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    2016-11-19 维他命
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    2017-04-26 智智灵药
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    2016-10-27 yahu
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    2016-10-25 榄枷檬

    躯体和灵魂必须有一个在路上

    0

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