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Updated: Jan 8, 2026

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遠位尿細管節における構成的Yap活性化は上皮アイデンティティと尿細管パターニングを破壊する
Zeinab Dehghani-Ghobadi1,2, Eunah Chung1,2, Mohammed Sayed3
1Feinberg Cardiovascular & Renal Research Institute, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
bioRxiv : the preprint server for biology
|December 22, 2025
まとめ
腎臓の遠位尿細管(DCT)および接続細管(CNT)における持続的なYap活性化は、細胞のアイデンティティと構造を破壊する。このシグナル伝達は隣接する近位尿細管の発達にも影響を与え、腎臓の恒常性におけるHippo-Yap経路の役割を強調している。
科学分野:
- 腎臓学
- 分子生物学
- 発生生物学
背景:
- 遠位尿細管(DCT)および接続細管(CNT)は、電解質バランスと腎臓の恒常性にとって不可欠です。
- Hippo経路の腎臓発生における役割は知られていますが、遠位尿細管節におけるその機能は不明です。
研究 の 目的:
- Hippo経路のエフェクターであるYapの機能を遠位尿細管節で調査すること。
- Yapの機能獲得が上皮組織化と尿細管分節化に与える影響を理解すること。
主な方法:
- Cre誘導型Yap機能獲得アレル(Col1a1-Yap5SA)を生成しました。
- Yap活性化のために遠位尿細管特異的Slc12a3Creドライバーを利用しました。
- 表現型、分子、およびトランスクリプトーム解析を実施しました。
主要な成果:
- Slc12a3CreはDCTとCNTの両方を標的とし、CNTがDCT細胞から生じる可能性を示唆しています。
- 構成的Yap活性化は、増殖、細胞移動、および上皮間葉転換の増加につながりました。
- DCT/CNTマーカー発現、極性、および接合部構造の破壊が観察されました。
- 突然変異した腎臓では、近位尿細管マーカーの発現低下が見られ、非細胞自律的な効果を示唆しています。
結論:
- 遠位尿細管節における持続的なYap活性化は、上皮の完全性とアイデンティティを破壊します。
- Yap活性化は、近位尿細管に影響を与える尿細管パターニングに対して非細胞自律的な効果を発揮します。
- Hippo-Yapシグナル伝達の厳密な制御は、腎臓上皮構造と尿細管分節化の維持に不可欠です。
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