空间定义的危险区通过CCDC80+通过纤维细胞诱导的CD8+ T细胞功能障碍塑造胃癌的进展
Shaocong Mo1, Yulin Wang2, Rong Xiong3
1Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai, China.
概括
研究人员确定了胃癌 (GC) 的"危险区域",与预后不佳和免疫抑制有关. 这种由特定纤维细胞驱动的空间特征为这种侵略性癌症提供了新的生物标志物和治疗点.
科学领域:
- 在瘤学瘤学.
- 癌症生物学 癌症生物学
- 免疫学 免疫学 免疫学
背景情况:
- 胃癌 (GC) 呈现出显著的异质性,通常是由瘤微环境驱动的,这有助于治疗耐药性和患者的不良结果.
- 瘤微环境中的复杂相互作用对于理解GC进展和治疗反应至关重要.
研究的目的:
- 识别和描述胃癌微环境中的空间特征,这些特征与疾病进展和免疫规避有关.
- 基于空间转录基因数据,开发新的胃癌生物标志物和预后工具.
主要方法:
- 在小鼠和人类胃癌样本上使用空间转录学来识别关键的微环境区域.
- 非负矩阵因子化和机器学习模型 (XGBoost,LightGBM) 用于患者分层和生物标志物发现.
- 单细胞和空间分析阐明了特定细胞类型的功能作用,如CCDC80+纤维细胞,在确定区域内.
- 在体外共同培养实验和途径抑制 (CXCL12封锁) 验证了关键的分子相互作用.
主要成果:
- 鉴定出一个不同的流体-免疫-血管核心,称为"危险区",富含扩散型GC,并与晚期和免疫抑制微环境相关.
- 根据危险区的特征,GC患者被分为两种亚型,其中亚型2显示出更差的生存率和免疫治疗反应减少.
- 危险区内的CCDC80+纤维细胞被确定为关键驱动因素,通过CXCL12-CXCR4信号招募CD8+T细胞,并通过PD-1和TIM-3上调诱导其功能障碍.
- 一个LightGBM模型成功地从H&E幻灯片中预测了危险区域的得分,与 stromal 透和患者存活相关.
结论:
- "危险区"代表了胃癌进展,免疫抑制和治疗耐药性的关键空间特征.
- 新的生物标志物和预后工具,包括基因特征和基于H&E的评分,可以从危险区中获得.
- 在危险区内准已识别的纤维细胞介导免疫抑制机制,对胃癌具有治疗潜力.
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