細胞毒性T細胞は,標的細胞を殺す力を強化するために機械的力を使用する

Roshni Basu¹, Benjamin M Whitlock², Julien Husson³

¹Immunology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.

Cell

|March 1, 2016

まとめ

細胞毒性Tリンパ球 (CTL) は免疫シナプスで物理的な力を使って標的細胞を殺す. この機械的な力はパーフェリン孔の形成を加速し,CTL細胞毒性を高め,免疫細胞機能の物理的側面を明らかにします.

科学分野:

免疫学
細胞生物学
バイオ物理学

背景:

免疫シナプスは,細胞毒性Tリンパ球 (CTL) と標的細胞との間の重要なインターフェースです.
細胞毒性分子を放出することで感染した細胞や癌細胞を除去します
この過程における機械的な力の役割は完全に理解されていません

研究の目的:

免疫シナプスにおける機械的な力が,CTLによる標的細胞破壊を促進するかどうかを調査する.
フォースエクサションとペルファリン孔形成の動態の関係を決定する.
標的細胞のメカニズムが CTLによる殺戮にどのように影響するか調べるためだ

主な方法:

免疫シナプスを横断する力を測定するために生体物理実験を用いた.
標的細胞の穴形成速度を定量化した.
細胞毒性への影響を評価するために標的細胞の緊張を操作します.

主要な成果:

シナプス・フォースの大きさとペルファリン・ポア形成の速度の間には強い相関が観察された.
標的細胞の緊張が増加すると,ペルフェリン孔形成とCTL媒介による死が強化された.
CTLは空間と時間的にパーフェリン放出と力行使を調整することが判明しました.

結論:

メカニカル・フォースは,パーフェリン活性を増強することで,CTL細胞毒性を強化する上で重要な役割を果たします.
標的細胞の物理的性質は免疫細胞の殺戮の効率を調節することができます.
細胞の力学は免疫反応における分泌されたシグナル分子の重要な調節因子です

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