高级别浆液性卵巢癌短与长期生存者的肿瘤微环境分子与空间差异
本研究比较了15例短期生存（STS，<12个月）与15例长期生存（LTS，≥120个月）的III-IV期高级别浆液性卵巢癌（HGSOC）大网膜转移样本，整合全基因组RNA测序与机器学习图像分析。STS肿瘤成纤维细胞含量更高、癌细胞含量更低，且成纤维细胞相关基因与上皮-间质转化标志物上调；LTS则富集免疫信号通路，提示两者微环境存在显著差异。
要点
- STS大网膜转移灶成纤维细胞含量高于LTS（48.6% vs 33.5%，p<0.05）。
- STS癌细胞含量低于LTS（48.0% vs 64.3%，p<0.05），肿瘤-成纤维细胞比例更低（0.9 vs 1.8，p<0.05）。
- STS上调成纤维细胞相关基因与EMT标志物，LTS富集免疫信号通路。
核心结论
- STS与LTS的大网膜转移灶具有不同的分子与空间特征，成纤维细胞富集与免疫反应通路富集提示微环境分歧可能具有临床意义。
研究设计与样本
- 回顾性比较研究，纳入15例STS（<12个月）和15例LTS（≥120个月）的III-IV期HGSOC患者，均接受初次减瘤术及铂类化疗，采集大网膜肿瘤样本。
- 采用全基因组RNA测序分析批量肿瘤切片，并对H&E染色全切片图像进行机器学习细胞分割与计算图像分析。
主要发现
- STS成纤维细胞含量为48.6%，LTS为33.5%（p<0.05）。
- STS癌细胞含量为48.0%，LTS为64.3%（p<0.05）；STS肿瘤-成纤维细胞比例为0.9，LTS为1.8（p<0.05）。
- 图像分析显示STS与LTS在核纹理、癌细胞空间组织和胶原架构上存在显著差异。
- STS中成纤维细胞相关基因ITGAV（p<0.05）和INHBA（p<0.0001）上调，EMT标志物ZEB1（p<0.001）和CALD1（p<0.001）上调；LTS富集免疫信号通路。
临床怎么用
- 基于成纤维细胞含量、癌细胞含量及基因表达谱的微环境特征可能有助于区分HGSOC预后亚型。
- 成纤维细胞相关基因与EMT标志物或可作为STS的潜在生物标志物，免疫通路富集提示LTS可能对免疫治疗更敏感。
局限性
- 样本量较小（STS和LTS各15例），结论需更大队列验证。
- 仅分析大网膜转移灶，未涉及原发灶或其他转移部位。
- 研究为观察性设计，无法确定微环境差异与生存的因果关系。
以上解读依据论文摘要（全文未开放获取或许可不允许翻译转载）。
原文
OBJECTIVE: Survival of patients diagnosed with advanced-stage high-grade serous ovarian cancer (HGSOC) varies widely. Understanding the biological and molecular differences between tumors associated with short-term and long-term survival may inform prognosis and treatment. METHODS: Omental tumor samples were collected from 15 short-term survivors (STS; <12 months) and 15 long-term survivors (LTS; ≥ 120 months) with stage III-IV HGSOC who underwent primary debulking surgery followed by platinum-based chemotherapy. Bulk tumor sections were analyzed using whole-genome RNA sequencing. Corresponding H&E-stained whole-slide images were processed using machine learning-based cell segmentation to identify cell phenotypes. Computational image analysis was used to extract morphometric features. The integrated transcriptomic and image-derived data were used to quantify proportions of cancer cells, fibroblasts, and immune cells, and to identify differences in nuclear texture, cancer cell spatial organization, and collagen architecture. RESULTSS: STS was associated with higher fibroblast content (48.6% vs 33.5%, p < 0.05), lower cancer cell content (48.0% vs 64.3%, p < 0.05), and a lower tumor-fibroblast proportion (0.9 vs 1.8, p < 0.05) than LTS. Computational image analyses identified significant differences in nuclear texture, cancer cell spatial organization, and collagen architecture. STS correlated with upregulation of fibroblast-associated genes (ITGAV, p < 0.05; INHBA, p < 0.0001) and epithelial-mesenchymal transition markers (ZEB1, p < 0.001; CALD1, p < 0.001), while LTS was enriched for immune signaling pathways. CONCLUSIONS: Omental metastases from STS and LTS patients have distinct molecular and spatial profiles. The enrichment of fibroblast-associated gene signatures in STS and immunoreactive pathways in LTS underscores a divergent tumor microenvironment with potential clinical relevance.
引用
- Smick AH, Zurek N, Taylor-Harding B, et al. Molecular and spatial differences in the tumor microenvironment of high-grade serous ovarian cancers with short versus long-term survival. Gynecol Oncol. 2026. PMID: 42176362. doi:10.1016/j.ygyno.2026.05.017
供执业医师工作参考，不替代临床判断；数值与分级以指南原文为准。