人間の機能獲得MC4R変種は,シグナルバイアスを示し,肥満から保護します
Luca A Lotta1, Jacek Mokrosiński2, Edson Mendes de Oliveira2
1University of Cambridge MRC Epidemiology Unit, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, UK.
Cell
|April 20, 2019
まとめ
メラノコルチン4受容体 (MC4R) 変異は,β-アレスティン信号伝達に影響することで,肥満に影響します. 機能増強型MC4Rは肥満および関連疾患に対する保護を提供しており,治療の可能性を示唆しています.
科学分野:
- 遺伝学
- 薬理学について
- 代謝 疾患
背景:
- メラノコルチン4受容体 (MC4R) は,エネルギーバランスの調節に不可欠です.
- MC4Rのシグナル伝達の障害は 肥満の主要な遺伝的原因です
- MC4R変異体の機能を理解することは,肥満および関連する疾患に対処する鍵です.
研究 の 目的:
- 大規模な集団で見つかった61のMC4R変異を機能的に特徴づける.
- 体重指数 (BMI) と心代謝疾患との関連を調査する.
- 肥満に対するMC4R変異の影響の信号経路を決定する.
主な方法:
- β-アレスティン募集とサイクルアデノシン・モノフォスファート (cAMP) アッセイを用いた61のMC4R変異体の機能的特徴化.
- 英国バイオバンクのデータを分析して,MC4R変異とBMIと心代謝疾患の流行を相関させた.
- ミトゲン活性化タンパク質キナーゼ (MAPK) 経路の活性化の評価
主要な成果:
- ベータアレスティンの最大有効性は,MC4Rの変異と関連したBMIの変異の88%を説明した.
- ほとんどの変異は機能の喪失を示したが,機能の獲得の変異は特定された.
- 機能増強のMC4R変異は,BMIの低下,肥満の減少,2型糖尿病,冠動脈疾患と関連していた.
結論:
- β - アレスティンの募集効果は,BMIに対するMC4R変異の影響を決定する重要な要因である.
- 機能獲得のMC4R変種,特にβ-アレスティンシグナル伝達に偏っている変種は,肥満と心代謝疾患に対する保護を与える.
- β-アレスティンバイアスのMC4Rシグナリングをターゲットにすることで,体重管理と肥満に関連する疾患の治療に有望な治療戦略が提示されます.
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