論文 - 詳細
| RRC ID | 87485 |
|---|---|
| 著者 | Niklaus S, Glasauer SMK, Kovermann P, Farshori KF, Cadetti L, Früh S, Rieser NN, Gesemann M, Zang J, Fahlke C, Neuhauss SCF. |
| タイトル | Glutamate transporters are involved in direct inhibitory synaptic transmission in the vertebrate retina. |
| ジャーナル | Open Biol |
| Abstract |
In the central nervous system of vertebrates, glutamate serves as the primary excitatory neurotransmitter. However, in the retina, glutamate released from photoreceptors causes hyperpolarization in post-synaptic ON-bipolar cells through a glutamate-gated chloride current, which seems paradoxical. Our research reveals that this current is modulated by two excitatory glutamate transporters, EAAT5b and EAAT7. In the zebrafish retina, these transporters are located at the dendritic tips of ON-bipolar cells and interact with all four types of cone photoreceptors. The absence of these transporters leads to a decrease in ON-bipolar cell responses, with eaat5b mutants being less severely affected than eaat5b/eaat7 double mutants, which also exhibit altered response kinetics. Biophysical investigations establish that EAAT7 is an active glutamate transporter with a predominant anion conductance. Our study is the first to demonstrate the direct involvement of post-synaptic glutamate transporters in inhibitory direct synaptic transmission at a central nervous system synapse. |
| 巻・号 | 14(7) |
| ページ | 240140 |
| 公開日 | 2024-7-1 |
| DOI | 10.1098/rsob.240140 |
| PMID | 39079673 |
| PMC | PMC11288666 |
| MeSH | Amino Acid Transport System X-AG* / genetics Amino Acid Transport System X-AG* / metabolism Animals Glutamic Acid / metabolism Mutation Retina* / metabolism Retinal Bipolar Cells / metabolism Synaptic Transmission* Zebrafish* / metabolism Zebrafish Proteins* / genetics Zebrafish Proteins* / metabolism |
| IF | 4.931 |
| オルトメトリクス指標 |
オルトメトリクス指標項目
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| 最多言及媒体 | X(Twitter) |
| 各媒体での言及数の合計 | 10 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| ゼブラフィッシュ | Tg(zfSWS1-5.5A:EGFP)kj9 Tg(zfSWS2-3.5A:EGFP)kj11 / tkk008 Tg(RH2-2:GFP-PAC)kj4 / tkk004 |