アディプシン (adipsin) は,糖尿病におけるβ細胞機能を改善するアディポキンです
James C Lo1, Sanda Ljubicic2, Barbara Leibiger3
1Dana-Farber Cancer Institute and the Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA; Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA.
Cell
|July 5, 2014
まとめ
脂肪組織タンパク質アディプシン (adipsin) は,2型糖尿病における臓β細胞機能に不可欠である. アディプシンレベルを回復すると,インスリン分泌とグルコースコントロールが改善され,新たな治療の可能性が生まれます.
科学分野:
- メタボリック疾患の研究
- エンドクリノロジー エンドクリノロジー
- 分子生物学は分子生物学である.
背景:
- 2型糖尿病 (T2DM) は,胰腺ベータ細胞不全によって特徴づけられ,インスリン不足と高血糖につながる.
- ベータ細胞機能を調節する脂肪組織からのシグナル伝達分子であるアディポキンの役割は,活発な調査の分野です.
研究 の 目的:
- アディポキンアディプシンが臓ベータ細胞機能を維持する役割と,T2DMの治療標的としての潜在能力を調査する.
主な方法:
- グルコース代謝とインスリン分泌を評価するために,アディプシンが欠けている遺伝子組み換え動物モデルを使用した.
- 隔離された臓の小島は,グルコース刺激によるインスリン分泌を研究するために使用されました.
- 糖尿病のマウスにアディプシンを投与し,高血糖症に対する効果を評価した.
- ペプチドC3aとその受容体を含むアディプシンの下流信号伝達経路を特定し,特徴づけました.
主要な成果:
- アディプシンが欠けていたマウスは,グルコース不耐症とインスリン分泌の減少を示した.
- 糖尿病のマウスのアディプシン補給は,インスリン分泌を増やすことで高血糖を改善しました.
- アディプシンによって生成されるペプチドC3aは,強力なインスリン分泌剤として特定されました.
- C3a受容体は,アディプシンが小島に与える有益な作用に不可欠であることが判明し,ATP,呼吸,およびCa2+) レベルの増加によって媒介されます.
- ベータ細胞不全の2型糖尿病患者では,アディプシン濃度が低下した.
結論:
- アディプシン/C3aシグナル伝達経路は,脂肪組織と臓β細胞機能の間の重要なリンクを代表しています.
- この経路はベータ細胞の生理学を維持する上で有益な役割を果たします.
- アディプシン/C3a経路を標的にすることは,2型糖尿病の管理に有望な治療戦略を提供します.
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