NK细胞刺激cDC1进入瘤微环境促进癌症免疫控制
Jan P Böttcher1, Eduardo Bonavita2, Probir Chakravarty3
1Immunobiology Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK.
Cell
|February 13, 2018
概括
自然杀手 (NK) 细胞通过化学因子招募常规的1型树突细胞 (cDC1). 瘤产生的前列腺素E2 (PGE2) 破坏了这一关键的NK细胞cDC1轴,阻碍了抗癌反应.
科学领域:
- 免疫学
- 癌症生物学
- 细胞生物学
背景情况:
- 传统的1型树突细胞 (cDC1) 对于启动抗瘤免疫反应至关重要.
- 瘤中cDC1的存在与免疫治疗结果的改善和免疫介导的瘤排斥有关.
研究的目的:
- 研究自然杀手 (NK) 细胞在cDC1招募瘤中的作用.
- 确定瘤逃避NK细胞介导的cDC1吸引力的机制.
- 探索向NK细胞cDC1轴的治疗潜力.
主要方法:
- 在小鼠瘤模型中分析cDC1积累.
- 在瘤中测量化学激素 (CCL5,XCL1,XCL2) 和前列腺素E2 (PGE2) 的水平.
- 评估NK细胞的活力和化学激素的产生.
- 对cDC1化学酶受体表达的评估.
主要成果:
- 在小鼠瘤中,NK细胞对于cDC1的积累至关重要,产生化学吸引剂CCL5和XCL1.
- 人类癌症中的内CCL5,XCL1和XCL2表达与NK细胞和cDC1特征以及更好的患者存活率相关.
- 来自瘤的PGE2会损害NK细胞功能和cDC1化学因子受体的表达,从而抑制NK细胞-cDC1轴.
结论:
- 通过化学激素的产生,NK细胞在吸引cDC1到瘤中起着至关重要的作用.
- 瘤产生的PGE2通过破坏NK细胞-cDC1相互作用来代表免疫逃避的关键机制.
- 针对NK细胞cDC1轴的PGE2中介抑制提供了增强抗瘤免疫力的潜在治疗策略.
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