クセノプスの尾の再生組織細胞の特定

C Aztekin^1,2, T W Hiscock^1,3, J C Marioni^3,4,5

¹Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge, UK.

Science (New York, N.Y.)

|May 18, 2019

まとめ

Xenopus laevisのタッドポールは再生組織細胞 (ROC) を介して尾を再生します. これらの細胞は傷付いた表皮を形成し尻尾の再生に不可欠なシグナルを伝達します

科学分野:

発達生物学
再生医療
両生類の生物学

背景:

哺乳類はXenopus laevisのタドポルと比べて再生能力が限られている.
モデル生物の細胞再生メカニズムを理解することは再生医療の進歩に不可欠です

研究の目的:

Xenopus laevisの尾の再生に関与する細胞プレーヤーを特定し,特徴づけること.
傷の表皮を形成し,組織の再生を指揮する特定の細胞の役割を解明する.

主な方法:

尾を切断した後にXenopus laevisのタッドポールを用いて単細胞RNAの配列を決定した.
再生能力と無能力のタッドポールの比較分析が行われました.
細胞機能を評価するために遺伝子操作 (切除と移植) が使用されました.

主要な成果:

再生組織細胞 (ROC) と呼ばれる新しい細胞タイプが特定されました.
ROCは表皮に存在し,有能なタドウの切断部位に移動し,傷の表皮を形成します.
ROCは再生に不可欠であり,その切除は再生を阻害し,移植は子宮外再生を誘発する.

結論:

再生組織細胞 (ROC) は,Xenopus laevisの尾の再生を開始し,組織化するために重要です.
ROCは傷の表皮を形成し,前身細胞を誘導するシグナル分子を分泌することによって機能します.
この研究により,Xenopus laevisの驚くべき再生能力の鍵となる細胞メカニズムが明らかになりました

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