CCL26-CX3CR1轴介导癌细胞和PMN-MDSC之间的反循环,以促进在胃癌发生过程中CD8+ T细胞耗尽
Xiaotao Jiang1,2, Hui Wu1,2, Ning Yan1,2
1First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong, China.
Research (Washington, D.C.)
|November 24, 2025
概括
胃癌细胞通过CCL26-CX3CR1轴招募免疫抑制的多态核核骨髓衍生抑制细胞 (PMN-MDSCs),推动瘤生长. 抑制CX3CR1可能提供一种新的胃癌治疗方法.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 瘤免疫微环境 (TIME) 在胃癌发生过程中至关重要.
- 多态核核髓衍生抑制细胞 (PMN-MDSCs) 是关键的免疫抑制剂,但它们在胃癌 (GC) 中的透机制和功能尚不清楚.
研究的目的:
- 阐明PMN-MDSC透和GC免疫抑制功能的机制.
- 研究CCL26-CX3CR1轴在胃癌发生中的作用.
- 评估CX3CR1抑制作为一种治疗策略.
主要方法:
- 在胃癌发生过程中观察PMN-MDSC上调.
- 分析GC细胞的CCL26分泌和通过CX3CR1.1通过PMN-MDSC透的分析.
- 研究涉及TGF-β1,SMAD2/3/SNAI1和CCL26.1的正反循环.
- 评估PMN-MDSC对mTOR信号传递和CD8+T细胞功能的影响.
- 在CX3CR1抑制后对抗PD-1疗法的疗效评估.
主要成果:
- GC细胞分泌CCL26,通过CX3CR1.1促进PMN-MDSC透.
- 入PMN-MDSCs通过分泌TGF-β1建立一个积极的反循环,维持CCL26的生产.
- PMN-MDSCs通过抑制mTOR信号和竞争葡萄糖来抑制T细胞功能,导致T细胞疲劳.
- 抑制CX3CR1减少了PMN-MDSC透,增强了抗PD-1的疗效,并抑制了瘤的生长.
结论:
- CCL26-CX3CR1轴在GC细胞和PMN-MDSC之间创建一个积极的反循环,促进免疫抑制和瘤发生.
- 针对PMN-MDSC的CX3CR1是一个潜在的治疗策略,用于预防和治疗胃癌.
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