Combined adult neurogenesis and BDNF mimic exercise effects on cognition in an Alzheimer's mouse model.

Combined adult neurogenesis and BDNF mimic exercise effects on cognition in an Alzheimer's mouse model.
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DOI:
10.1126/science.aan8821
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发表时间:
2018-09-07
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Tanzi RE
Tanzi RE
中科院分区:
其他
文献类型:
--
作者:
Choi SH;Bylykbashi E;Chatila ZK;Lee SW;Pulli B;Clemenson GD;Kim E;Rompala A;Oram MK;Asselin C;Aronson J;Zhang C;Miller SJ;Lesinski A;Chen JW;Kim DY;van Praag H;Spiegelman BM;Gage FH;Tanzi RE

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在阿尔茨海默病(AD)病理发生之前,成人海马神经发生(AHN)就已经受损。我们发现,运动通过诱导AHN和提高脑源性神经营养因子(BDNF)的水平,为5×FAD小鼠提供了认知方面的好处。无论是单独的安氏刺激,还是在没有增加安氏的情况下进行锻炼,都不能改善认知。我们成功地模仿了运动对阿尔茨海默病小鼠的有益影响,方法是通过遗传和药物诱导AHN,并结合提高BDNF水平。抑制Ahn后来导致认知能力恶化,并导致先前存在的齿状神经元丢失。因此,模拟运动的药理作用,增强ANN和提高BDNF水平,可能会改善AD的认知。此外,在阿尔茨海默病的早期阶段应用这些模拟物,可能会防止随后的神经细胞死亡。成人神经发生在阿尔茨海默病中的作用。
Adult hippocampal neurogenesis (AHN) is impaired prior to the onset of Alzheimer’s disease (AD) pathology. We found that exercise provided cognitive benefit to 5×FAD mice, a mouse model of AD, by inducing AHN and elevating levels of brain-derived neurotrophic factor (BDNF). Neither stimulation of AHN alone, nor exercise, in the absence of increased AHN, ameliorated cognition. We successfully mimicked the beneficial effects of exercise on AD mice by genetically and pharmacologically inducing AHN in combination with elevating BDNF levels. Suppressing AHN later led to worsened cognitive performance and loss of pre-existing dentate neurons. Thus, pharmacological mimetics of exercise, enhancing AHN and elevating BDNF levels, may improve cognition in AD. Furthermore, applied at early stages of AD, these mimetics may protect against subsequent neuronal cell death. Role of Adult Neurogenesis in Alzheimer’s Disease.
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