Synaptic inhibition in the olfactory bulb accelerates odor discrimination in mice.

Synaptic inhibition in the olfactory bulb accelerates odor discrimination in mice.
复制标题

DOI:
10.1016/j.neuron.2010.01.009
复制
发表时间:
2010-02-11
期刊:
影响因子:
16.2
通讯作者:
Kuner T
Kuner T
中科院分区:
医学1区
文献类型:
--
作者:
Abraham NM;Egger V;Shimshek DR;Renden R;Fukunaga I;Sprengel R;Seeburg PH;Klugmann M;Margrie TW;Schaefer AT;Kuner T

文献摘要

参考文献

被引文献

相似文献

局部抑制回路被认为是塑造中枢神经系统中的神经元信息处理,但目前尚不清楚抑制性神经元相互作用的具体特性如何转化为行为表现。在嗅球中,通过颗粒细胞抑制僧帽细胞/簇状细胞可能有助于通过改善气味的神经元表征来进行气味辨别行为。在这里,我们表明,选择性删除颗粒细胞中的AMPA受体亚基GluA 2促进突触Ca 2+内流,增加抑制二尖瓣细胞。在行为水平上,对相似气味混合物的辨别速度加快,而学习和记忆不受影响。相反,选择性地去除颗粒细胞中的NMDA受体会减缓对类似气味的辨别。我们的研究结果表明,抑制颗粒细胞谷氨酸受体控制的二尖瓣细胞的结果在快速和准确的歧视相似的气味。因此,嗅球颗粒细胞的时空定义的分子扰动直接链接刺激相似性,神经元的处理时间和歧视行为的突触抑制。
Local inhibitory circuits are thought to shape neuronal information processing in the central nervous system, but it remains unclear how specific properties of inhibitory neuronal interactions translate into behavioral performance. In the olfactory bulb, inhibition of mitral/tufted cells via granule cells may contribute to odor discrimination behavior by refining neuronal representations of odors. Here we show that selective deletion of the AMPA receptor subunit GluA2 in granule cells boosted synaptic Ca2+ influx, increasing inhibition of mitral cells. On a behavioral level, discrimination of similar odor mixtures was accelerated while leaving learning and memory unaffected. In contrast, selective removal of NMDA receptors in granule cells slowed discrimination of similar odors. Our results demonstrate that inhibition of mitral cells controlled by granule cell glutamate receptors results in fast and accurate discrimination of similar odors. Thus, spatio-temporally defined molecular perturbations of olfactory bulb granule cells directly link stimulus-similarity, neuronal processing time and discrimination behavior to synaptic inhibition.
DOI: 10.1126/science.270.5242.1677
发表时间: 1995-12-08
期刊: SCIENCE
影响因子: 56.9
作者:
BRUSA, R;ZIMMERMANN, F;SPRENGEL, R
通讯作者: SPRENGEL, R
DOI: 10.1016/s0896-6273(04)00753-6
发表时间: 2004-12-02
期刊: NEURON
影响因子: 16.2
作者:
Abraham, NM;Spors, H;Schaefer, AT
通讯作者: Schaefer, AT
DOI: 10.1038/nature05123
发表时间: 2006-10-12
期刊: NATURE
影响因子: 64.8
作者:
Chavez, Andres E.;Singer, Joshua H.;Diamond, Jeffrey S.
通讯作者: Diamond, Jeffrey S.
DOI: 10.1038/4561
发表时间: 1999-01-01
影响因子: 25
作者:
Feldmeyer, D;Kask, K;Seeburg, PH
通讯作者: Seeburg, PH
DOI: 10.1038/297227a0
发表时间: 1982-01-01
期刊: NATURE
影响因子: 64.8
作者:
JAHR, CE;NICOLL, RA
通讯作者: NICOLL, RA