Genetically increased cell-intrinsic excitability enhances neuronal integration into adult brain circuits.

Genetically increased cell-intrinsic excitability enhances neuronal integration into adult brain circuits.
复制标题

DOI:
10.1016/j.neuron.2009.12.001
复制
发表时间:
2010-01-14
期刊:
影响因子:
16.2
通讯作者:
Lois C
Lois C
中科院分区:
医学1区
文献类型:
--
作者:
Lin CW;Sim S;Ainsworth A;Okada M;Kelsch W;Lois C

文献摘要

参考文献

被引文献

相似文献

新的神经元在成年大脑的一生中不断增加,但最终只有一半整合到现有的电路中。感觉经验是选择新神经元的重要调节因素,但尚不清楚经验是否提供了突触输入的特定模式,或者仅仅是对整合至关重要的最低水平的整体膜去极化。为了研究这个问题,我们对哺乳动物嗅球中成人产生的神经元的内在电特性进行了基因改造。首先,我们观察到通过ESKir2.1钾通道的表达抑制细胞内的神经元活动的水平降低,而通过表达NaChBac钠通道增强细胞的活动则增加了新神经元的存活率。这两种调节方式都不影响突触的形成。此外,即使当神经元被诱导发出显著改变的动作电位模式时,细胞内在活动水平的增加也完全阻止了NMDA受体缺失引发的细胞死亡。这些发现表明,细胞内在活动的总体水平控制着新神经元的存活,准确的放电模式对于神经元整合到现有的大脑回路并不是必不可少的。
New neurons are added to the adult brain throughout life, but only half ultimately integrate into existing circuits. Sensory experience is an important regulator of the selection of new neurons but it remains unknown whether experience provides specific patterns of synaptic input, or simply a minimum level of overall membrane depolarization critical for integration. To investigate this issue, we genetically modified intrinsic electrical properties of adult-generated neurons in the mammalian olfactory bulb. First, we observed that suppressing levels of cell-intrinsic neuronal activity via expression of ESKir2.1 potassium channels decreases, whereas enhancing activity via expression of NaChBac sodium channels increases survival of new neurons. Neither of these modulations affects synaptic formation. Furthermore, even when neurons are induced to fire dramatically altered patterns of action potentials, increased levels of cell-intrinsic activity completely blocks cell death triggered by NMDA receptor deletion. These findings demonstrate that overall levels of cell-intrinsic activity govern survival of new neurons and precise firing patterns are not essential for neuronal integration into existing brain circuits.
DOI: 10.1371/journal.pbio.0050300
发表时间: 2007-11-01
期刊: PLOS BIOLOGY
影响因子: 9.8
作者:
Kelsch, Wolfgang;Mosley, Colleen P.;Lois, Carlos
通讯作者: Lois, Carlos
DOI: 10.1073/pnas.0807970105
发表时间: 2008-10-28
影响因子: 11.1
作者:
Kelsch, Wolfgang;Lin, Chia-Wei;Lois, Carlos
通讯作者: Lois, Carlos
DOI: 10.1523/jneurosci.2406-09.2009
发表时间: 2009-09-23
期刊: The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子: --
作者:
Kelsch W;Lin CW;Mosley CP;Lois C
通讯作者: Lois C
DOI: 10.1038/nn1847
发表时间: 2007-03-01
影响因子: 25
作者:
Kee, Nohjin;Teixeira, Catia M.;Frankland, Paul W.
通讯作者: Frankland, Paul W.
DOI: 10.1523/jneurosci.18-24-10464.1998
发表时间: 1998-12-15
影响因子: 5.3
作者:
Bi, GQ;Poo, MM
通讯作者: Poo, MM