A novel mechanism of hippocampal LTD involving muscarinic receptor-triggered interactions between AMPARs, GRIP and liprin-alpha.

A novel mechanism of hippocampal LTD involving muscarinic receptor-triggered interactions between AMPARs, GRIP and liprin-alpha.
复制标题

DOI:
10.1186/1756-6606-2-18
复制
发表时间:
2009-06-17
期刊:
影响因子:
3.6
通讯作者:
Cho K
Cho K
中科院分区:
医学3区
文献类型:
--
作者:
Dickinson BA;Jo J;Seok H;Son GH;Whitcomb DJ;Davies CH;Sheng M;Collingridge GL;Cho K

文献摘要

参考文献

被引文献

相似文献

海马体中的长期抑郁 (LTD) 可以通过激活不同类型的 G 蛋白偶联受体,特别是代谢型谷氨酸受体 (mGluR) 和毒蕈碱乙酰胆碱受体 (mAChR) 来诱导。由于 mGluR 和 mAChR 激活相同的 G 蛋白和磷脂酶 C (PLC) 亚型,因此预计这两种形式的 LTD 采用相同的分子机制。然而,我们发现 LTD 的独特机制涉及 GRIP 和 liprin-α。虽然这两种形式的 LTD 都需要酪氨酸磷酸酶的激活并涉及 AMPAR 的内化,但它们使用不同的分子相互作用。具体而言,mAChR-LTD(而非 mGluR-LTD)被抑制 GRIP 与 AMPA 受体亚基 GluA2 结合以及 GRIP 与 liprin-α 结合的肽阻断。因此,利用相同 G 蛋白的不同受体可以通过不同的分子机制调节 AMPAR 运输和突触功效。我们的结果表明 mAChR-LTD 选择性地涉及 GRIP 和 liprin-α 之间的相互作用。这些数据表明了突触可塑性的一种新机制,其中 M1 受体的激活通过涉及 GluA2、GRIP 和 liprin-α 之间相互作用的机制导致 AMPAR 内吞作用。
Long-term depression (LTD) in the hippocampus can be induced by activation of different types of G-protein coupled receptors, in particular metabotropic glutamate receptors (mGluRs) and muscarinic acethycholine receptors (mAChRs). Since mGluRs and mAChRs activate the same G-proteins and isoforms of phospholipase C (PLC), it would be expected that these two forms of LTD utilise the same molecular mechanisms. However, we find a distinct mechanism of LTD involving GRIP and liprin-α. Whilst both forms of LTD require activation of tyrosine phosphatases and involve internalisation of AMPARs, they use different molecular interactions. Specifically, mAChR-LTD, but not mGluR-LTD, is blocked by peptides that inhibit the binding of GRIP to the AMPA receptor subunit GluA2 and the binding of GRIP to liprin-α. Thus, different receptors that utilise the same G-proteins can regulate AMPAR trafficking and synaptic efficacy via distinct molecular mechanisms. Our results suggest that mAChR-LTD selectively involves interactions between GRIP and liprin-α. These data indicate a novel mechanism of synaptic plasticity in which activation of M1 receptors results in AMPAR endocytosis, via a mechanism involving interactions between GluA2, GRIP and liprin-α.
DOI: 10.1016/s0896-6273(00)00160-4
发表时间: 2000-12-01
期刊: NEURON
影响因子: 16.2
作者:
Daw, MI;Chittajallu, R;Isaac, JTR
通讯作者: Isaac, JTR
DOI: 10.1523/jneurosci.0799-04.2004
发表时间: 2004-07-07
影响因子: 5.3
作者:
Hayashi, T;Huganir, RL
通讯作者: Huganir, RL
DOI: 10.1016/s0028-3908(99)00123-9
发表时间: 1999-10-01
期刊: NEUROPHARMACOLOGY
影响因子: 4.7
作者:
Fitzjohn, SM;Kingston, AE;Collingridge, GL
通讯作者: Collingridge, GL
DOI: 10.1016/s0006-8993(01)02484-2
发表时间: 2001-06-29
期刊: BRAIN RESEARCH
影响因子: 2.9
作者:
Beach, TG;Walker, DG;Fisher, A
通讯作者: Fisher, A
DOI: 10.1016/j.neuropharm.2008.06.063
发表时间: 2009-01
期刊: Neuropharmacology
影响因子: 4.7
作者:
Collingridge GL;Olsen RW;Peters J;Spedding M
通讯作者: Spedding M