GABAergicニューロンのREV-ERBは,日中の肝臓インスリン感受性を制御する
Guolian Ding1,2,3, Xin Li3, Xinguo Hou4
1Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, Fudan University, Shanghai, China.
Nature
|March 25, 2021
まとめ
脳内の核受容体REV-ERB
科学分野:
- クロノバイオロジー
- 神経内分泌学
- 代謝の調節
背景:
- 全身のインスリン感受性は毎日のリズムを示し,目覚めるとピークに達します.
- この昼間のパターンの 根本的な分子メカニズムは 未知のままです
- 糖尿病の"夜明けの延長現象"は,朝の血糖値が上昇することを意味します.
研究 の 目的:
- インスリン感受性の昼間リズムを 分子的に制御することを明らかにする.
- SCN GABAergicニューロンのREV-ERB核受容体の役割を調査する.
- サーカディアン・クロックのメカニズムと 延長された夜明けの現象との関係を調べるためだ
主な方法:
- REV-ERBの機能を研究するためにマウスモデルを使用した.
- SCN GABAergicニューロン活動を操作するために使用された化学遺伝学.
- REV- ERBとSCNニューロン活動に関連した遺伝子発現パターンとグルコース代謝を分析した.
- 2型糖尿病患者におけるREV- ERB遺伝子発現の比較
主要な成果:
- SCN GABAergicニューロンのREV- ERBは,肝臓のグルコース産生抑制の昼間リズムを制御する.
- REV- ERBは,SCN GABAergicニューロンの神経伝達遺伝子発現と発火活動を調節する.
- REV-ERBまたはSCNニューロンのリズムが乱されれば,グルコース不耐性が生じ,リズムが回復すると,この現象型が回復する.
- 2型糖尿病患者で観察された REV- ERB 遺伝子発現パターンの違い
結論:
- SCN GABAergicニューロンのREV- ERB核受容体は,昼間のインスリン感受性リズムの主な調節体である.
- これらの発見は,中央日経時計と肝臓のグルコース調節の間のメカニズム的なリンクを提供します.
- この研究は,REV-ERBの役割を示唆する2型糖尿病における延長された夜明け現象の洞察を提供します.
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