メラノコルチン4受容体は,交感性および寄交感性プレガンリオンニューロンを相互に調節する
Jong-Woo Sohn1, Louise E Harris, Eric D Berglund
1Department of Internal Medicine, Division of Hypothalamic Research, University of Texas Southwestern Medical Center at Dallas, Dallas, TX 75390, USA.
Cell
|February 5, 2013
まとめ
メラノコルチン4受容体 (MC4Rs) は,エネルギーバランスを調節する. MC4Rアゴニストは自律神経細胞に影響を与え,インスリンと血圧に影響を与え,特に肥満では.
科学分野:
- 神経科学は神経科学である.
- エンドクリノロジー エンドクリノロジー
- 心血管生理学 心血管の生理学
背景:
- メラノコルチン4受容体 (MC4Rs) は,エネルギーとグルコースのホメオスタシスに不可欠です.
- 肥満におけるMC4R変異は,高インスリン血症と高血圧に対する耐性に関連しており,これは自律神経系 (ANS) 調節による可能性が高い.
- 交感性および寄交感性ニューロンに対するMC4Rの正確な細胞作用は十分に理解されていません.
研究 の 目的:
- 異なる自律神経細胞集団に対するMC4Rの細胞効果を解明する.
- インスリンと血圧の調節におけるコレリン神経細胞におけるMC4Rsの役割を調査する.
- MC4Rに関連した自律的副作用の細胞基礎を理解するために.
主な方法:
- パラシンパティックおよびシンパティックプレガンリオンニューロンの電気生理学的記録.
- 特定のニューロン集団におけるMC4Rのデリエーションと再発現を用いた遺伝子操作.
- マウスモデルにおけるインスリンレベルと血圧の評価.
主要な成果:
- MC4Rアゴニストは,パラシンパティック・プレガンリオンニューロンを抑制するが,シンパティック・プレガンリオンニューロンを活性化することが判明した.
- コリン性ニューロンにおけるMC4Rの欠損は,インスリン濃度の上昇につながった.
- コリン神経神経におけるMC4Rの回復は,MC4Rのゼロマウスにおける肥満に関連した高血圧を正常化した.
結論:
- MC4Rは,交感経路とパラシンパシー経路に異なる効果を発揮する.
- コリン性ニューロンのMC4Rは,インスリン分泌と血圧の調節に不可欠です.
- これらの発見は,代謝障害におけるMC4Rに関連した自律的失調の基礎となる細胞メカニズムを明確にします.
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