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メラノコルチンのシグナル伝達が,ヒトの食事中のマクロニュートリエントの好みに与える役割
Agatha van der Klaauw1, Julia Keogh1, Elana Henning1
1Metabolic Research Laboratories, Wellcome Trust MRC Institute of Metabolic Science, University of Cambridge, Cambridge, UK.
Lancet (London, England)
|August 28, 2015
まとめ
メラノコルチン4受容体 (MC4R) 欠乏症の患者は,マクロ栄養素摂取量の変化を示しています. MC4Rを示しています.
科学分野:
- 神経科学
- 人間の生理学
- 代謝に関する研究
背景:
- 視床下にあるメラノコルチン4受容体 (MC4R) 経路は,ネズミの食物摂取とマクロ栄養素の好みを調節する.
- 人間のMC4R欠乏症の研究は,人間の食欲の調節と食事の選択におけるこの経路の役割についての洞察を提供します.
- この研究は,MC4R機能喪失変異がヒトの脂肪とサクラロースの好みに与える影響を調査しています.
研究 の 目的:
- メラノコルチンのシグナル伝達がヒトの脂肪と砂糖の好みを決定する役割を調査する.
- MC4R欠乏症と健康な対照群のマクロ栄養素摂取量と好みを比較する.
主な方法:
- 研究には,MC4R欠乏症の24人の肥満患者と80人の健康な対照群 (40人の肥満患者,40人の痩せた患者) が含まれていた.
- 参加者は,秘密裏に操作された脂肪 (20-60%) と砂糖 (8-54%) を含む自由食を摂取しました.
- 食事の摂取量と好み (視覚的なアナログスコア) を測定し,ANOVAと線形混合効果モデルを使用してデータを分析した.
主要な成果:
- MC4R欠乏症の患者は,痩せた対照群よりも95%多く,肥満対照群よりも65%多く摂取した.
- 高砂糖の食事を好む傾向は,MC4R欠乏症の患者で著しく減少した.
- MC4R欠乏症の患者は,健康な対照群と比較して,テストされた全てのサクラゼの摂取量が少なくなった.
結論:
- 中央メラノコルチン系は,マクロ栄養素の好みと摂取量に異なった影響を及ぼします.
- MC4Rのシグナリングは,脂肪の摂取と砂糖の好みを調節する上で重要な役割を果たし,各マクロ栄養素に明確な影響を及ぼします.
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