核内因子赤血球2関連因子2(Nrf2)シグナル伝達経路の増強は、ヒト胚性幹細胞からの脂肪細胞分化を促進する
Min Hee Park1, Da Yeon Gil1, Hyo-Won Han1
1Department of Chronic Diseases Convergence Research, Division of Intractable Diseases Research, Korea National Institute of Health, Republic of Korea; Korea National Stem Cell Bank, Chungcheongbuk-do, Republic of Korea.
Experimental cell research
|January 31, 2026
まとめ
核内因子赤血球2関連因子2(Nrf2)は、ヒト脂肪細胞分化において重要な役割を果たします。Nrf2シグナル伝達の増強は脂肪形成を促進し、脂肪細胞のサイズと脂質蓄積を増加させます。
科学分野:
- 細胞生物学
- 分子生物学
- 幹細胞研究
背景:
- 核内因子赤血球2関連因子2(Nrf2)は、細胞防御機構に不可欠な転写因子です。
- ヒト脂肪細胞分化におけるNrf2の特定の役割は、よく理解されていません。
研究 の 目的:
- Nrf2のヒト脂肪細胞分化への寄与を調査すること。
- Nrf2シグナル伝達増強の脂肪形成促進ポテンシャルを探求すること。
主な方法:
- Nrf2シグナル伝達を増強するためのKEAP1遺伝子欠損を伴うヒト胚性幹細胞(hESCs)を用いたinvivo奇形腫モデルを利用しました。
- 定量的転写解析(TeratoScore)およびIngenuity Pathway Analysisを実施しました。
- hESCsから脂肪細胞への段階的なinvitro分化を実施しました。
主要な成果:
- Nrf2シグナル伝達の増強は、奇形腫内の脂肪細胞のサイズと面積を著しく増加させました。
- 転写解析により、主要な脂肪形成マーカー(FABP4、PPARG、ADIPOQ、CEBPA)の発現増加を伴う、脂肪形成関連シグナル伝達ネットワークの活性化が明らかになりました。
- invitro分化により脂質小滴の蓄積が増加し、Nrf2の脂肪形成促進的な役割が支持されました。PAX3は潜在的な転写標的として同定されました。
結論:
- Nrf2はヒト脂肪形成において重要な脂肪形成促進的役割を果たします。
- Nrf2シグナル伝達の増強は、脂肪細胞分化と脂質蓄積を促進します。
- Nrf2シグナル伝達は、脂肪形成を調節するための新規標的である可能性があります。
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