MAPKi耐性を獲得したメラノーマの非遺伝的および免疫的進化
Willy Hugo1, Hubing Shi1, Lu Sun1
1Division of Dermatology, Department of Medicine, University of California, Los Angeles, Los Angeles, CA 90095-1662, USA; David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095-1662, USA.
Cell
|September 12, 2015
まとめ
メラノマは非遺伝的変化や 免疫系の変化によって 標的治療に対する耐性を発達させます これらの変化は,治療効果と免疫療法に対する潜在的な反応に影響します.
科学分野:
- 腫瘍学
- 免疫学
- ゲノミクス
背景:
- メラノーマにおけるMAPK阻害剤 (MAPKi) 治療に対する獲得抵抗は,遺伝的変異によって完全に説明されません.
- 腫瘍の免疫は耐性と共に進化し,治療結果に影響を与える.
研究 の 目的:
- メラノーマにおけるMAPKi耐性の非遺伝的メカニズムを特定する.
- 耐性発現中の腫瘍内免疫組成のダイナミックな変化を特徴付ける.
主な方法:
- 治療前および進行中の患者マッチングメラノーマの比較トランスクリプトミクスおよびメチロミクス分析.
- 分析は,再発する非ゲノム変異と免疫細胞の動態を特定することに焦点を当てました.
主要な成果:
- DNAメチル化変化と相関する再発性トランスクリプトミカル変異は,耐性の原動力として特定されました.
- 重要な非ゲノム要因には,c-MET発現の増加,LEF1発現減少,およびYAP1シグネチャー濃縮が含まれています.
- CD8 T細胞の枯渇と抗原表現の低下が,免疫療法に対する潜在的なクロスレジスタンスを示唆している.
結論:
- メラノーマは,ダイナミックで再発的な非遺伝的変異によってMAPKi耐性を獲得する.
- 同進化した腫瘍内免疫は抵抗性において重要な役割を果たし,後の免疫療法への反応を予測する可能性がある.
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