Presynaptic long-term depression at the hippocampal mossy fiber-CA3 synapse

被引:133
作者
Kobayashi, K [1 ]
Manabe, T [1 ]
Takahashi, T [1 ]
机构
[1] UNIV TOKYO,FAC MED,INST BRAIN RES,BUNKYO KU,TOKYO 113,JAPAN
关键词
D O I
10.1126/science.273.5275.648
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Long-term potentiation (LTP) and long-term depression (LTD) of synaptic strength may underlie learning and memory in the brain. The induction of LTP occurs in postsynaptic cells in the hippocampal CA1 region but is presynaptic in CA3. LTD is also well characterized in CA1 but not in CA3. Low-frequency stimulation of mouse hippocampal slices caused homosynaptic LTD at the messy fiber-CA3 synapse, which may be induced presynaptically by activation of metabotropic glutamate receptors. Thus, the efficacy of messy fiber-CA3 synapses can be regulated bidirectionally, which may contribute to neuronal information processing.
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页码:648 / 650
页数:3
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