PMID- 16677760 OWN - NLM STAT- MEDLINE DCOM- 20060928 LR - 20211203 IS - 0304-3940 (Print) IS - 0304-3940 (Linking) VI - 401 IP - 1-2 DP - 2006 Jun 19 TI - A role for the mTOR pathway in surface expression of AMPA receptors. PG - 35-9 AB - Delivery of alpha-amino-3-hydroxy-5-methylisoxazole-4-proprionate receptors (AMPARs) to the synapse is a critical factor controlling synaptic strength. It is now established that blockade of synaptic activity increases the surface expression of AMPARs. Factors modulating the delivery, insertion and expression of AMPARs are not completely known. Using immunohistochemical techniques, we first confirmed rapamycin-mediated inhibition of the mammalian target of rapamycin (mTOR) pathway in cortical neuronal culture. We then demonstrated that acute AMPAR activity blockade increased the synaptic expression of GluR2/3 subunits and rapamycin significantly reduced this expression. Our results suggest a role for the mTOR pathway in surface expression of AMPA receptors on cortical neurons. FAU - Wang, Yanling AU - Wang Y AD - Epilepsy Research Laboratory in the Department of Neurological Surgery and PIBS Graduate Program in Neuroscience, University of California, Box 0520, 513 Parnassus Ave., San Francisco, CA 94143, USA. FAU - Barbaro, Michael F AU - Barbaro MF FAU - Baraban, Scott C AU - Baraban SC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20060503 PL - Ireland TA - Neurosci Lett JT - Neuroscience letters JID - 7600130 RN - 0 (Excitatory Amino Acid Antagonists) RN - 0 (Immunosuppressive Agents) RN - 0 (Receptors, AMPA) RN - 0 (Receptors, Cell Surface) RN - 0 (glutamate receptor ionotropic, AMPA 3) RN - 3KX376GY7L (Glutamic Acid) RN - EC 2.7.- (Protein Kinases) RN - EC 2.7.1.1 (mTOR protein, mouse) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - P6W5IXV8V9 (glutamate receptor ionotropic, AMPA 2) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Animals MH - Animals, Newborn MH - Cells, Cultured MH - Cerebral Cortex/cytology/metabolism MH - Dendrites/metabolism/ultrastructure MH - Excitatory Amino Acid Antagonists/pharmacology MH - Glutamic Acid/*metabolism MH - Immunosuppressive Agents/pharmacology MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Neurons/cytology/*metabolism MH - Protein Kinases/genetics/*metabolism MH - Receptor Aggregation/*genetics MH - Receptors, AMPA/antagonists & inhibitors/*metabolism MH - Receptors, Cell Surface/antagonists & inhibitors/metabolism MH - Sirolimus/pharmacology MH - Synaptic Transmission/*genetics MH - TOR Serine-Threonine Kinases EDAT- 2006/05/09 09:00 MHDA- 2006/09/29 09:00 CRDT- 2006/05/09 09:00 PHST- 2005/11/15 00:00 [received] PHST- 2006/03/01 00:00 [revised] PHST- 2006/03/01 00:00 [accepted] PHST- 2006/05/09 09:00 [pubmed] PHST- 2006/09/29 09:00 [medline] PHST- 2006/05/09 09:00 [entrez] AID - S0304-3940(06)00252-7 [pii] AID - 10.1016/j.neulet.2006.03.011 [doi] PST - ppublish SO - Neurosci Lett. 2006 Jun 19;401(1-2):35-9. doi: 10.1016/j.neulet.2006.03.011. Epub 2006 May 3.