トレリスツリーベースの分析は,患者によるオーガノイド薬反応のストロマル調節を明らかにする
María Ramos Zapatero1, Alexander Tong2, James W Opzoomer1
1Cell Communication Lab, Department of Oncology, University College London Cancer Institute, London WC1E 6DD, UK.
Cell
|December 8, 2023
まとめ
大量サイトメトリのプラットフォームと分析方法を開発し,大腸がん (CRC) のオーガノイドとその微小環境を研究しました. これは,がんに関連した線維芽細胞 (CAF) が幹細胞の状態を変えることで,CRC細胞を化学療法から保護する方法を示しています.
科学分野:
- 腫瘍学
- バイオテクノロジー
- 細胞生物学
背景:
- 患者由来オーガノイド (PDO) は,パーソナライズされたがん治療の応答をモデル化するのに価値があります.
- 現在のスクリーニング方法では 薬物メカニズムや 腫瘍の微小環境細胞が 治療結果に及ぼす影響を明らかにする解像度が不足しています
研究 の 目的:
- 大腸がん (CRC) PDOとその関連ストロマ細胞における薬剤反応メカニズムを分析するための高通量プラットフォームを開発する.
- 癌に関連した線維細胞 (CAF) がCRC細胞の可塑性および治療抵抗性に与える影響を調査する.
主な方法:
- 高複合質量細胞測定プラットフォームを使用して,PCMシグナル伝達,DNA損傷,細胞サイクル状態,および2,500以上のCRC PDOおよびCAFにおけるアポトーシスを評価した.
- 単細胞解像度で患者とマイクロ環境特有の薬剤反応を比較するためのスケーラブルなツリーベースの分析方法"Trellis"を開発しました.
主要な成果:
- 単細胞スクリーニングは,薬剤耐性PDOでも,細胞サイクル阻害やDNA損傷などの一般的な標的薬物効果を特定しました.
- 薬剤によるアポトーシスはよりまれで,患者特異であり,がん細胞のPTMシグナル伝達と相関していることが判明しました.
- CAFはCRC幹細胞の可塑性を誘発し,増殖状態 (proCSCs) から慢循環状態 (revCSCs) に移行させ,それによって化学療法耐性を授与することが示された.
結論:
- 開発されたプラットフォームとトレリス法は,複雑な腫瘍のマイクロ環境内の薬物反応に関する深いメカニズム的な洞察を可能にします.
- CAFによる保護メカニズムの理解は,化学抵抗性大腸がんに対する新しい治療戦略の開発に不可欠です.
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