FABP4とヌクレオシドキナーゼのホルモン複合体は島の機能を調節する
Kacey J Prentice1, Jani Saksi1, Lauren T Robertson1
1Sabri Ülker Center for Metabolic Research, Harvard T. H. Chan School of Public Health, Department of Molecular Metabolism, Boston, MA, USA.
Nature
|December 9, 2021
まとめ
脂肪酸結合タンパク質4 (FABP4) は,新しいホルモン複合体であるファブキンを形成し,エネルギーバランスとベータ細胞機能を調節します. この複合体をターゲットにすることで 1型と2型糖尿病を予防する見込みがあります
科学分野:
- 内分泌学と代謝
- 分子生物学
- 心血管研究
背景:
- 脂肪細胞のエネルギー貯蔵の解放は不可欠ですが,インスリン抵抗性に関連した制御不能の脂質分解は,代謝恒常性を破壊します.
- 循環脂肪酸結合タンパク質4 (FABP4) のレベルは心臓代謝疾患と相関しているが,その作用メカニズムは不明である.
研究 の 目的:
- ホルモンのFABP4の作用メカニズムを解明する.
- 細胞外ATP/ADPのレベルを調節するFABP4の役割とそのベータ細胞への影響を調査する.
- FABP4複合体による代謝疾患の予防の可能性を調査する.
主な方法:
- FABP4,アデノシンキナーゼ (ADK),ヌクレオシドジフォスファートキナーゼ (NDPK) を含む機能性ホルモン複合体の形成を調査した.
- この複合体による細胞外ATPとADPの調節を評価した.
- 糖尿病のモデルにおけるFABP4複合体の抗体媒介標的化による代謝結果とベータ細胞機能の影響を評価した.
主要な成果:
- ホルモンのFABP4が,細胞外ATPとADPを調節するFabkinと呼ばれるADKとNDPKとの複合体を形成することを実証した.
- ベータ細胞に対するファブキン複合体の有意な影響を特定し,脂肪ベータ細胞内分泌軸における役割を示唆した.
- 抗体媒介によるファブキン複合体のターゲティングは代謝の健康を改善し,ベータ細胞の機能を強化し,ベータ細胞の完全性を保ちます.
結論:
- FABP4-ADK-NDPK複合体 (Fabkin) は,エネルギーホメオスタシスと代謝器官機能を調節する新しいホルモンです.
- ファブキンは脂肪ベータ細胞軸の重要な調節体として働き,脂質分解とベータ細胞機能に影響を与えます.
- 1型と2型糖尿病やその他の代謝疾患を予防するための有望な治療戦略です
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