Anti-Hebbian long-term potentiation in the hippocampal feedback inhibitory circuit.
Anti-Hebbian long-term potentiation in the hippocampal feedback inhibitory circuit.
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DOI:
10.1126/science.1137450
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发表时间:
2007-03-02
期刊:
影响因子:
--
通讯作者:
Kullmann DM
中科院分区:
文献类型:
--
作者:
Lamsa KP;Heeroma JH;Somogyi P;Rusakov DA;Kullmann DM
Long-term potentiation (LTP), which approximates Hebb’s postulate of associative learning, typically requires depolarization-dependent glutamate receptors of the NMDA (N-methyl-d-aspartate) subtype. However, in some neurons, LTP depends instead on calcium-permeable AMPA-type receptors. This is paradoxical because intracellular polyamines block such receptors during depolarization. We report that LTP at synapses on hippocampal interneurons mediating feedback inhibition is “anti-Hebbian”: It is induced by presynaptic activity but prevented by postsynaptic depolarization. Anti-Hebbian LTP may occur in interneurons that are silent during periods of intense pyramidal cell firing, such as sharp waves, and lead to their altered activation during theta activity.
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