Assessing the role of GLUK5 and GLUK6 at hippocampal mossy fiber synapses

被引：58

作者：

Breustedt, J ^{[1
]}

Schmitz, D ^{[1
]}

机构：

[1] Charite Univ Med Berlin, Neurowissensch Forschungszentrum, D-10117 Berlin, Germany

来源：

JOURNAL OF NEUROSCIENCE | 2004年 / 24卷 / 45期

关键词：

hippocampus; kainate receptors; long-term potentiation; mossy fiber synapses; short-term potentiation; synaptic plasticity;

D O I：

10.1523/JNEUROSCI.3078-04.2004

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

It has been suggested recently that presynaptic kainate receptors (KARs) are involved in short-term and long-term synaptic plasticity at hippocampal mossy fiber synapses. Using genetic deletion and pharmacology, we here assess the role of GLU(K5) and GLU(K6) in synaptic plasticity at hippocampal mossy fiber synapses. We found that the kainate-induced facilitation was completely abolished in the GLU(K6) (-/-) mice, whereas it was unaffected in the GLU(K5)(-/-). Consistent with this finding, synaptic facilitation was reduced in the GLU(K6)(-/-) and was normal in the GLU(K5)(-/-). In agreement with these results and ruling out any compensatory effects in the genetic deletion models, application of the GLU(K5)-specific antagonist LY382884 [( 3S,4aR,6S,8aR)-6-(4-carboxyphenyl)methyl-1,2,3,4,4a,5,6,7,8,8a-decahydroisoquinoline-3-carboxylic acid] did not affect short-term and long-term synaptic plasticity at the hippocampal mossy fiber synapses. We therefore conclude that the facilitatory effects of kainate on mossy fiber synaptic transmission are mediated by GLU(K6)-containing KARs.

引用

页码：10093 / 10098

页数：6

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