TRPA1 channels regulate astrocyte resting calcium and inhibitory synapse efficacy through GAT-3.
TRPA1 channels regulate astrocyte resting calcium and inhibitory synapse efficacy through GAT-3.
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DOI:
10.1038/nn.3000
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发表时间:
2011-12-11
影响因子:
25
通讯作者:
中科院分区:
文献类型:
--
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Astrocytes contribute to the formation and function of synapses and are found throughout the brain where they display intracellular store mediated Ca2+ signals. Here, using a membrane tethered genetically encoded calcium indicator (Lck-GCaMP3), we report the serendipitous discovery of a novel Ca2+ signal in rat hippocampal astrocyte-neuron co-cultures. We found that TRPA1 channel mediated Ca2+ fluxes give rise to frequent and highly localised near membrane “spotty” Ca2+ microdomains that contribute significantly to resting Ca2+ levels of astrocytes. Mechanistic evaluations in brain slices show that decreasing astrocyte resting Ca2+ levels mediated by TRPA1 channels decreased interneuron inhibitory synapse efficacy by reducing GABA transport via GAT-3, thus elevating extracellular GABA levels. Our data indicate how a novel transmembrane Ca2+ source (TRPA1) targets a transporter (GAT-3) in astrocytes to regulate inhibitory synapses.
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影响因子:
5.6
作者:
Bomben, Valerie C.;Turner, Kathryn L.;Barclay, Tia-Tabitha C.;Sontheimer, Harald
通讯作者:
Sontheimer, Harald
DOI:
10.1126/science.1169096
发表时间:
2009-02-27
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Kuchibhotla KV;Lattarulo CR;Hyman BT;Bacskai BJ
通讯作者:
Bacskai BJ
影响因子:
11.8
作者:
Macia, Eric;Ehrlich, Marcelo;Kirchhausen, Tomas
通讯作者:
Kirchhausen, Tomas
影响因子:
5.5
作者:
Golovina, VA
通讯作者:
Golovina, VA
影响因子:
16.2
作者:
Kwan, KY;Allchorne, AJ;Corey, DP
通讯作者:
Corey, DP