p53は,表皮修復中のリーダー細胞の行動,移動,クリアランスを指示する

Kasia Kozyrska^1,2, Giulia Pilia¹, Medhavi Vishwakarma¹

¹School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1TD, UK.

Science (New York, N.Y.)

|February 10, 2022

まとめ

傷の修復を促すリーダー細胞は p53の活性化によって現れる. このストレス反応は移動を促進し,組織修復が完了するとそれらの除去を保証し,一時的な細胞集団メカニズムを強調します.

科学分野:

細胞生物学
組織修復メカニズム
傷の癒し力学

背景:

外皮細胞の移動は傷の修復に不可欠です
移動するシートの最前線にある Leader 細胞がこの移動を推進します.
同質な集団からリーダー細胞の出現は,まだ十分に理解されていません.

研究の目的:

皮質単層におけるリーダー細胞の出現の背後にあるメカニズムを調査する.
リーダー細胞の行動を誘発し制御する分子経路を特定する
組織修復後のリーダー細胞の運命を理解するためです

主な方法:

培養された上皮単層のリーダー細胞の特徴化.
リーダー細胞形成におけるストレスセンサp53の役割の分析
p21^WAF1/CIP1と細胞サイクル調節を含むp53のダウンストリーム効果因子の調査.
細胞競争のダイナミクスとリーダー細胞の排除の評価

主要な成果:

ストレスセンサp53の活性化は,リーダー細胞の行動を誘導するのに十分です.
p53はp21^WAF1/CIP1を上調し,サイクリン依存キナーゼの活性を抑制し,リーダー細胞の特性を促進する.
リーダー細胞は群集過敏性を表し,上皮の閉塞時に細胞の競争によって排除されます.
機械的に誘発されたp53は,リーダー細胞の一時的な出現と,その後のクリアランスをオーケストラします.

結論:

機械的に誘発されたp53は,上皮の傷の修復中にリーダー細胞の出現の重要なレギュラーです.
p53-p21のWAF1/CIP1経路は,リーダー細胞の行動と移動を制御する.
細胞の競争は,修復後のリーダー細胞をクリアするメカニズムを提供し,組織ホメオスタシスを確保します.

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