胃癌细胞运送乳酸以诱导类似CAF的炎症表型和功能,在骨髓衍生的介质干细胞中发挥作用
Feng Huang1, Xiaoli Cao2, Jingyu Mei3
1Department of Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China; Department of Clinical Laboratory, Maternal and Child Health Care Hospital of Kunshan, Suzhou, Jiangsu Province, China; Department of Clinical Laboratory, Kunshan First People's Hospital, Affiliated to Jiangsu University, Kunshan, Jiangsu Province, China.
Molecular immunology
|May 10, 2025
概括
胃癌细胞使用乳酸激活骨髓衍生中酶干细胞 (BM-MSCs),促进瘤生长. 阻止乳酸生产或其影响可能是癌症治疗的新策略.
科学领域:
- 在瘤学瘤学.
- 癌症新陈代谢 癌症新陈代谢
- 癌症免疫学 癌症免疫学
背景情况:
- 代谢重编程,包括华堡效应,是导致乳酸积聚的癌症特征.
- 骨髓衍生中酶干细胞 (BM-MSCs) 在胃癌中促进癌症相关纤维细胞 (CAFs).
- 乳酸在胃瘤微环境中的BM-MSCs激活中的特定作用尚不清楚.
研究的目的:
- 研究乳酸在胃癌中激活BM-MSCs中的作用.
- 为了确定乳酸激活的BM-MSC是否促进瘤进展和免疫逃避.
- 探索针对胃癌中乳酸代谢的治疗策略.
主要方法:
- 用外源乳酸盐和胃癌细胞超眠剂治疗BM-MSCs.
- 使用AZD3965和氧胺酸抑制乳酸生产.
- 对BM-MSC表型,信号通路 (NF-κB,TGF-β) 和细胞因子分泌 (IL-8) 的分析.
- 评估激活的BM-MSC对胃癌细胞迁移,入侵和CD8+T细胞细胞毒性 (PD-L1表达) 的影响.
主要成果:
- 外源乳酸诱导了BM-MSCs中的亲瘤原始表型,其特征是NF-κB激活和IL-8分泌.
- 低毒性胃癌细胞在教育BM-MSC方面比正常性细胞更有效.
- 乳酸激活的BM-MSCs通过PD-L1上调促进了胃癌细胞的迁移,入侵,并通过PD-L1上调增强了对T细胞细胞毒性的抵抗力.
- 抑制乳酸生产或其信号显著降低了这些前瘤源的效应.
结论:
- 胃癌细胞通过乳酸穿机制在BM-MSC中诱导一种免疫抑制的,与癌症相关的纤维细胞样 (iCAF) 现型.
- 由乳酸驱动的代谢重编程和细胞通信,促进支持性瘤微环境.
- 向乳酸代谢是一种潜在的治疗策略,可以破坏BM-MSC介导的胃癌支持.
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