Eradicating the mediators of neuronal death with a fine-tooth comb.

Eradicating the mediators of neuronal death with a fine-tooth comb.
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DOI:
10.1126/scisignal.3125pe20
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发表时间:
2010-06-08
期刊:
影响因子:
7.3
通讯作者:
Zukin RS
Zukin RS
中科院分区:
生物学1区
文献类型:
--
作者:
Zukin RS

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缺血耐受是一种进化上保守的脑可塑性形式,其中短暂的脑缺血(称为缺血预处理)赋予脑中对随后的缺血挑战的短暂耐受。多梳族蛋白是基因沉默因子,在胚胎发生过程中丰富且广泛分布,并且对于表观遗传细胞记忆、多能性和干细胞自我更新至关重要。缺血预处理激活成熟神经元中的polycomb蛋白,这一发现突出了对缺血耐受潜在分子机制的新认识。多梳蛋白通过表观遗传基因沉默来消除神经元死亡的潜在介质并促进细胞停滞,使成熟神经元能够在缺血性中风中存活。
Ischemic tolerance is an evolutionarily conserved form of cerebral plasticity in which a brief period of cerebral ischemia (called ischemic preconditioning) confers transient tolerance to a subsequent ischemic challenge in the brain. Polycomb group proteins are gene-silencing factors that are abundant and widely distributed during embryogenesis and are essential to epigenetic cellular memory, pluripotency, and stem cell self-renewal. New insight into the molecular mechanisms underlying ischemic tolerance is highlighted by the finding that ischemic preconditioning activates polycomb proteins in mature neurons. Polycomb proteins act through epigenetic gene silencing to eradicate potential mediators of neuronal death and promote cellular arrest, enabling mature neurons to survive ischemic stroke.
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