生きたニューロンにおけるコリナージック神経伝達の単一のシナプス観察: 濃度と動態
Mei Shen1, Zizheng Qu1, Justin DesLaurier1
1Department of Chemistry , University of Illinois at Urbana-Champaign , 600 South Matthews Avenue , Urbana , Illinois 61801 , United States.
Journal of the American Chemical Society
|June 9, 2018
まとめ
研究者はナノスケールの電気分析法を使用してシナプスアセチルコリン濃度と放出ダイナミクスをリアルタイムで測定しました. この研究は 脳の機能や神経疾患を理解するために 重要なシナプス神経伝達を 詳細に明らかにしています
科学分野:
- 神経科学
- 電気化学
- バイオ物理学
背景:
- アセチルコリンは人間の健康に重要な役割を果たす重要な神経伝達物質です.
- アセチルコリンのシナプス濃度の動態と放出パターンは,ほとんど不明である.
研究 の 目的:
- シナプスアセチルコリン濃度と放出ダイナミクスの同期測定を in situ で実証する.
- 高精度でシナプスでアセチルコリンを定量的に検知する
主な方法:
- 15nm半径のナノITIES電極を含むナノスケールの電気分析方法を使用した.
- ナノ解像度スキャニング電気化学顕微鏡 (SECM) を時間解像度測定に使用した.
- 他の種からの干渉を無視して,定量的なセンシングを適用する技術.
主要な成果:
- 生きたアプリシアニューロンにおけるシナプスアセチルコリン濃度と放出ダイナミクスをリアルタイムで測定した.
- シナプスの近くで高濃度のアセチルコリンが測定され,最大で2. 4mMに達した.
- シグナルとノイズの比率 (6-130) を有する多様な放出イベント (シングレット,ダブルレット,マルチレット) が観察されました.
結論:
- この研究はシナプス神経伝送の ダイナミクスに関する 前例のない詳細を提供します
- 発見は脳のコミュニケーションと 神経学的疾患の理解に役立つ.
- 伝統的な超シナプス研究とは異なる新しいアプローチを提案しています.
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