卵巣がんにおける悪性および免疫学的クローンダイナミクスのインターフェース

Allen W Zhang¹, Andrew McPherson², Katy Milne³

¹Department of Molecular Oncology, BC Cancer, Vancouver, BC V5Z 4E6, Canada; BC Children's Hospital Research, Vancouver, BC V5Z 4H4, Canada; Graduate Bioinformatics Training Program, University of British Columbia, Vancouver, BC V6T 1Z3, Canada.

Cell

|May 15, 2018

まとめ

高度血清性卵巣がん (HGSC) の進行は,腫瘍の免疫微環境によって形成されます. 皮質のCD8+T細胞は悪性多様性を減少させ,病気の拡散と患者の生存に影響を与えます.

科学分野:

腫瘍学
免疫学
ゲノミクス

背景:

高度血清性卵巣がん (HGSC) は,重要なクローン多様性と複雑な拡散パターンを表しています.
腫瘍の進行と異質性の形成における局所免疫微環境の役割は,まだ完全に理解されていません.

研究の目的:

局所的な免疫微環境因子,特に腫瘍浸透性リンパ球 (TILs) が,HGSCの進行とクローン多様性にどのように影響するか調査する.
HGSCにおけるゲノム異常,免疫反応,患者の生存の相互作用を調査する.

主な方法:

38人のHGSC患者から採取した212個のサンプルを複数の領域で分析した.
全ゲノムシーケンシング,免疫ヒスト化学,組織画像分析,遺伝子発現プロファイリング,T細胞とB細胞受容体のシーケンシングを使用した.
免疫学的サブタイプを特定し,患者の空間的異質性を評価した.

主要な成果:

患者内での有意な多様性を持つ3つの異なる免疫学的なサブタイプが検出された.
新抗原の枯渇とHLA Iの損失によって示される悪性多様性の減少と関連していた.
特定の変異過程と免疫特性との間の組み合わせによる予後効果が観察され,生存に影響を与えます.

結論:

免疫微環境における患者内空間的変動は,HGSCにおける腹膜内伝播を著しく形作る.
免疫相互作用,特にCD8+TILは,HGSCの進化動態とクローン分散に寄与する.
発見は,HGSCの病原性と潜在的な治療目標に関する新しい進化的視点を提供します.

キーワード:

HGSC について HLA についてクロンの進化クローン折り畳み逆転高度卵巣がんヒト白血球抗原免疫編集腫瘍内異質性転移する変異シグネチャー腫瘍に浸透するリンパ球

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