Homeostatic scaling requires group I mGluR activation mediated by Homer1a.
Homeostatic scaling requires group I mGluR activation mediated by Homer1a.
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DOI:
10.1016/j.neuron.2010.11.008
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发表时间:
2010-12-22
期刊:
影响因子:
16.2
通讯作者:
Worley PF
中科院分区:
文献类型:
--
作者:
Hu JH;Park JM;Park S;Xiao B;Dehoff MH;Kim S;Hayashi T;Schwarz MK;Huganir RL;Seeburg PH;Linden DJ;Worley PF
Homeostatic scaling is a non-Hebbian form of neural plasticity that maintains neuronal excitability and informational content of synaptic arrays in the face of changes of network activity. Here, we demonstrate that homeostatic scaling is dependent on group I metabotropic glutamate receptor activation that is mediated by the immediate early gene Homer1a. Homer1a is transiently up-regulated during increases in network activity and evokes agonist-independent signaling of group I mGluRs that scales down the expression of synaptic AMPA receptors. Homer1a effects are dynamic and play a role in the induction of scaling. Similar to mGluR-LTD, Homer1a-dependent scaling involves a reduction of tyrosine phosphorylation of GluA2 (GluR2), but is distinct in that it exploits a unique signaling property of group I mGluR to confer cell-wide, agonist-independent activation of the receptor. These studies reveal an elegant interplay of mechanisms that underlie Hebbian and non-Hebbian plasticity.
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DOI:
10.1038/nrd2760
发表时间:
2009-01
期刊:
Nature reviews. Drug discovery
影响因子:
--
作者:
通讯作者:
--
影响因子:
64.8
作者:
Ango, F;Prézeau, L;Fagni, L
通讯作者:
Fagni, L
影响因子:
5.3
作者:
Hayashi, T;Huganir, RL
通讯作者:
Huganir, RL
影响因子:
16.2
作者:
Chowdhury, Shoaib;Shepherd, Jason D.;Worley, Paul F.
通讯作者:
Worley, Paul F.
影响因子:
3.5
作者:
Ango, F;Robbe, D;Fagni, L
通讯作者:
Fagni, L