Circulatory miR34a as an RNAbased, noninvasive biomarker for brain aging.

Circulatory miR34a as an RNAbased, noninvasive biomarker for brain aging.
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循环miR34a作为用于脑衰老的无创,无创的生物标志物。

DOI:
10.18632/aging.100371
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发表时间:
2011-10
期刊:
Aging
影响因子:
--
通讯作者:
Wang E
Wang E
中科院分区:
其他
文献类型:
--
作者:
Li X;Khanna A;Li N;Wang E

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血液样本中的microRNA已被确定为一类重要的生物标志物,它可以反映从癌症到脑功能障碍的生理变化。在这份报告中,我们确定了从2天大的新生儿到青年期和中年到25个月的老年,大脑和小鼠血液样品的两种组分(外周血单核细胞(PBMC)和血浆)中miR-34 a表达水平的一致增加。这种microRNA的主要靶点沉默信息调节因子1(SIRT 1)在大脑和两个血液来源的标本中的水平随着年龄的增长而下降,与miR-34 a成反比,早在4个月大时就开始了,此时组织还没有开始明显的老化。研究结果表明:1.血液样本中miR-34 a的增加及其靶点SIRT 1的相互减少是脑中年龄依赖性变化的可获得的生物标志物;和2.这些变化是大脑功能即将衰退的预测因子,早在年轻的成年小鼠中就有。
MicroRNAs in blood samples have been identified as an important class of biomarkers, which can reflect physiological changes from cancer to brain dysfunction. In this report we identify concordant increases in levels of expression of miR-34a in brain and two components of mouse blood samples, peripheral blood mononuclear cells (PBMCs) and plasma, from 2 day old neonates through young adulthood and mid-life to old age at 25 months. Levels of this microRNA's prime target, silent information regulator 1 (SIRT1), in brain and the two blood-derived specimens decrease with age inversely to miR-34a, starting as early as 4 months old, when appreciable tissue aging has not yet begun. Our results suggest that: 1. Increased miR-34a and the reciprocal decrease of its target, SIRT1, in blood specimens are the accessible biomarkers for age-dependent changes in brain; and 2. these changes are predictors of impending decline in brain function, as early as in young adult mice.
艾姆斯侏儒小鼠肝脏中的 MicroRNA 调节可能有助于延缓衰老。
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发表时间: 2011-09-21
期刊: NATURE
影响因子: 64.8
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