肥満とインスリン抵抗性におけるJNKの中心的な役割
Jiro Hirosumi1, Gürol Tuncman, Lufen Chang
1Division of Biological Sciences and Department of Nutrition, Harvard School of Public Health, 665 Huntington Avenue, Boston, Massachusetts 02115, USA.
Nature
|November 26, 2002
まとめ
肥満は,II型糖尿病の危険因子であるインスリン抵抗性を高めます. c-Junアミノ端末キナーゼ (JNK) を阻害すると,肥満が減り,マウスのインスリン感受性が向上し,JNKが治療目標であることを示唆しています.
科学分野:
- バイオケミストリー バイオケミストリー
- メタボリック疾患の研究
- 分子生物学は分子生物学である.
背景:
- 肥満は,インスリン抵抗性に関連した2型糖尿病の主要な危険因子です.
- 肥満とインスリン抵抗性を結びつける分子機構は完全に理解されていません.
- c-Junアミノ端末キナーゼ (JNK) は,インスリン抵抗性に関与し,糖尿病に関連する炎症分子によって活性化されます.
研究 の 目的:
- 肥満に起因するインスリン抵抗性におけるJNK活動の役割を調査する.
- JNKが肥満と2型糖尿病の潜在的な治療標的であるかどうかを判断する.
主な方法:
- 肥満モデルにおけるJNK活性測定.
- 肥満のマウスモデルにおけるJNK1欠乏が肥満とインスリン感受性に及ぼす影響を分析した.
主要な成果:
- JNKの活動は,肥満において異常に上昇していることが判明しました.
- JNK1が欠けていたマウスは,脂肪が減少し,インスリン感受性が著しく改善した.
- インスリン受容体のシグナル伝達能力は,JNK1欠乏症の肥満マウスで強化されました.
結論:
- JNKは,肥満とインスリン抵抗性を媒介する上で重要な役割を果たします.
- JNK抑制は,肥満と2型糖尿病の管理のための有望な治療戦略です.
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