成熟的三级淋巴体结构支持B细胞介导的抗瘤免疫力,并且在直肠癌中被新辅助疗法破坏:一个多中心的回顾性研究
Na Tian1, Qianyu Wang2, Yuan Lv3
1Senior Department of General Surgery, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China; Beijing Chest Hospital, Capital Medical University, Beijing, 101149, China.
EBioMedicine
|November 20, 2025
概括
在直肠癌中,成熟的三级淋巴体结构 (mTLS) 与更好的结局和B细胞活性有关. 新辅助疗法增加了T细胞,但减少了mTLS,这表明B细胞对非响应者的策略.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 癌症研究 癌症研究
背景情况:
- 三级淋巴体结构 (TLS) 和它们的成熟 (mTLS) 在瘤免疫微环境 (TIME) 中影响抗瘤免疫力和治疗反应.
- 在直肠癌 (RC) 中mTLS的特定作用及其对新辅助疗法 (neoTx) 的反应尚不清楚.
研究的目的:
- 研究直肠癌中成熟的三级淋巴体结构 (mTLS) 的特征.
- 确定新辅助疗法 (neoTx) 如何调节瘤免疫微环境,重点关注mTLS和免疫细胞透.
- 为了将mTLS存在和免疫细胞概况与患者的预后和对neoTx的反应相关联.
主要方法:
- 两种直肠癌队列的回顾性分析使用多omics分析,包括大量RNA-seq,免疫组织化学,多重免疫光,scRNA-seq和scBCR-seq.
- 在新辅助疗法 (neoTx) 之前和之后,对局部晚期直肠癌 (LARC) 患者的瘤样本进行分析.
- 评估免疫细胞密度,B细胞特征和T细胞透与mTLS和患者存活率相关的情况.
主要成果:
- mTLS瘤表现出血细胞,生殖中心B细胞,卵泡B细胞的增加,CD138,IgG和IgA表达的增加.
- 在mTLS瘤中,scRNA-seq和scBCR-seq显示了更高的血细胞丰富度,更广泛的克隆多样性,以及更多的IgG+/IgA+血细胞.
- 高CD138表达与有利的生存相关;neoTx后的瘤显示T细胞透率增加 (CD4 +,CD8 +,CD45RO +),但mTLS存在率降低.
- neoTx的响应者具有丰富的B细胞基因特征和CD20+细胞密度,尽管TLS成熟度没有显著差异.
结论:
- 成熟的三级淋巴体结构 (mTLS) 与增强的B细胞介导免疫力和直肠癌的良好预后有关.
- 新辅助疗法 (neoTx) 增加了T细胞透,但减少了直肠瘤中mTLS的存在.
- 在非响应者中持续的B细胞激活表明,保护或增强幽默免疫力的疗法可能有利于这个患者群体.
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