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Nat. Neurosci:蛋白质Dnmt3a2或可提高记忆力

2012-07-04 郭洋 新华网

  记忆力随着年龄的增长逐渐减退,能否让人重拾记忆备受关注。日前,德国科学家在《自然—神经科学》(Nature Neuroscience)的网站上报告说,他们发现了一种可以提高记忆力的蛋白质。 德国海德堡大学的研究人员发现,随着年龄增大,实验鼠大脑中一种名为Dnmt3a2的蛋白质越来越少,这可能是其记忆力减退的原因。 研究人员随后在不具备传染性的病毒载体中注入这种蛋白质,再将其注入

 

记忆力随着年龄的增长逐渐减退,能否让人重拾记忆备受关注。日前,德国科学家在《自然—神经科学》(Nature Neuroscience)的网站上报告说,他们发现了一种可以提高记忆力的蛋白质。

德国海德堡大学的研究人员发现,随着年龄增大,实验鼠大脑中一种名为Dnmt3a2的蛋白质越来越少,这可能是其记忆力减退的原因。

研究人员随后在不具备传染性的病毒载体中注入这种蛋白质,再将其注入老年实验鼠的大脑。结果显示,老年实验鼠的记忆力得到了改善,达到与年轻实验鼠相当的水平。而当研究人员减少年轻实验鼠体内的Dnmt3a2蛋白质时,年轻实验鼠的记忆力则会下降。

参与研究的希尔马·巴丁说,科学界将来有望利用这种蛋白质来治疗人类记忆力减退。不过人类的组织结构更为复杂,向人类大脑中注入这种蛋白质并非易事。

doi:10.1038/nn.3151
PMC:

PMID:

Rescue of aging-associated decline in Dnmt3a2 expression restores cognitive abilities

Ana M M Oliveira, Thekla J Hemstedt & Hilmar Bading

Cognitive abilities decline in normal aging, yet the underlying molecular mechanisms are poorly understood. We found that aging was associated with a decrease in the expression of the DNA methyltransferase Dnmt3a2 in the hippocampus and that rescuing Dnmt3a2 levels restored cognitive functions. Moreover, we found that Dnmt3a2 is an activity-regulated…

 

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    2013-02-01 liye789132251
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    2012-07-06 lsndxfj
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    2012-07-06 zjubiostat

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