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2019 Fiscal Year Final Research Report

Analysis of mechanical stress-mediated control mechanism of cancer stem cell character in oral squamous cell carcinoma.

Research Project

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Project/Area Number 17K11837
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Surgical dentistry
Research InstitutionHiroshima University

Principal Investigator

Shigeishi Hideo  広島大学, 医系科学研究科(歯), 講師 (90397943)

Co-Investigator(Kenkyū-buntansha) 太田 耕司  広島大学, 医系科学研究科(歯), 教授 (20335681)
小野 重弘  広島大学, 医系科学研究科(歯), 助教 (70379882)
Project Period (FY) 2017-04-01 – 2020-03-31
Keywords癌幹細胞 / 口腔癌 / ハイドロゲル / 細胞外基質
Outline of Final Research Achievements

We investigated changes in phenotype in CD44 high-oral squamous cell carcinoma cells that were cultured on laminin332-coated hydrogel with various degrees of stiffness. Mesenchymal-like morphology was observed when cells were cultured on 4.0 kPa laminin-coated hydrogel; amoeboid-like morphology was observed when cells were cultured on 1.0 kPa laminin-coated hydrogel. These results indicated that CD44high cells underwent mesenchymal to amoeboid transition when cultured on laminin-coated softer hydrogel.

Free Research Field

Molecular Oncology

Academic Significance and Societal Importance of the Research Achievements

CD44high口腔扁平上皮癌細胞は、ラミニン332にてコーテイングしたハイドロゲル上にて培養した結果、足場の弾性率の変化によりamoeboid様形態を示す細胞に変化することが明らかとなった。さらに、アクチン細胞骨格を制御するcofilin-1がamoeboid様細胞の形態維持に必要であることが示唆された。このことから、口腔癌幹細胞は周囲の細胞外基質や足場の弾性率に応じて、細胞形態や遺伝子発現パターンを柔軟に変化させることが可能であり、表現型および遺伝子発現の可塑性が口腔癌幹細胞の重要な特徴のひとつであることが明らかとなった。

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Published: 2021-02-19  

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