Title |
Channel-mediated astrocytic glutamate modulates hippocampal synaptic plasticity by activating postsynaptic NMDA receptors
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Published in |
Molecular Brain, February 2015
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DOI | 10.1186/s13041-015-0097-y |
Pubmed ID | |
Authors |
Hyungju Park, Kyung-Seok Han, Jinsoo Seo, Jaekwang Lee, Shashank M Dravid, Junsung Woo, Heejung Chun, Sukhee Cho, Jin Young Bae, Heeyoung An, Woohyun Koh, Bo-Eun Yoon, Rolando Berlinguer-Palmini, Guido Mannaioni, Stephen F Traynelis, Yong Chul Bae, Se-Young Choi, C Justin Lee |
Abstract |
BackgroundActivation of G protein coupled receptor (GPCR) in astrocytes leads to Ca2+-dependent glutamate release via Bestrophin 1 (Best1) channel. Whether receptor-mediated glutamate release from astrocytes can regulate synaptic plasticity remains to be fully understood.ResultsWe show here that Best1-mediated astrocytic glutamate activates the synaptic N-methyl-D-aspartate receptor (NMDAR) and modulates NMDAR-dependent synaptic plasticity. Our data show that activation of the protease-activated receptor 1 (PAR1) in hippocampal CA1 astrocytes elevates the glutamate concentration at Schaffer collateral-CA1 (SC-CA1) synapses, resulting in activation of GluN2A-containing NMDARs and NMDAR-dependent potentiation of synaptic responses. Furthermore, the threshold for inducing NMDAR-dependent long-term potentiation (LTP) is lowered when astrocytic glutamate release accompanied LTP induction, suggesting that astrocytic glutamate is significant in modulating synaptic plasticity.ConclusionsOur results provide direct evidence for the physiological importance of channel-mediated astrocytic glutamate in modulating neural circuit functions. |
X Demographics
Geographical breakdown
Country | Count | As % |
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Unknown | 1 | 100% |
Demographic breakdown
Type | Count | As % |
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Science communicators (journalists, bloggers, editors) | 1 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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United States | 2 | 2% |
Egypt | 1 | 1% |
Unknown | 85 | 97% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Ph. D. Student | 16 | 18% |
Researcher | 14 | 16% |
Student > Master | 14 | 16% |
Student > Bachelor | 13 | 15% |
Professor > Associate Professor | 4 | 5% |
Other | 10 | 11% |
Unknown | 17 | 19% |
Readers by discipline | Count | As % |
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Neuroscience | 26 | 30% |
Agricultural and Biological Sciences | 16 | 18% |
Biochemistry, Genetics and Molecular Biology | 8 | 9% |
Medicine and Dentistry | 8 | 9% |
Computer Science | 2 | 2% |
Other | 6 | 7% |
Unknown | 22 | 25% |