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瘤中性粒细胞的铁死会导致癌症中的免疫抑制

Rina Kim^1,2,3, Ayumi Hashimoto⁴, Nune Markosyan^1,5

¹Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA.

|November 17, 2022

概括

细胞死亡过程 - - 铁死通过骨髓衍生抑制细胞损害T细胞活动,意外地促进瘤生长. 抑制这些细胞中的铁死抑制瘤并增强免疫疗法.

科学领域:

细胞生物学
免疫学
癌症研究

背景情况:

铁死是一种调节的细胞死亡途径,涉及脂质过氧化.
铁灭诱导剂对癌细胞有前途,但在动物模型中成功程度有限,这表明免疫相互作用是关键.
骨髓衍生抑制细胞 (MDSC) 负面调节抗瘤免疫力.

研究的目的:

调查瘤微环境中的骨髓衍生抑制细胞 (PMN-MDSC) 中铁的作用.
了解PMN-MDSCs的铁如何影响抗瘤免疫力和瘤进展.
探索调节PMN-MDSC癌症治疗中的治疗潜力.

主要方法:

在瘤微环境中分析PMN-MDSC.
研究铁灭诱导和抑制对PMN-MDSC和T细胞活性的影响.
在免疫能力较强的小鼠模型中使用遗传和药理方法.
评估瘤进展和对免疫检查点封锁的反应.

主要成果:

在瘤微环境中,PMN-MDSC会发生铁.
PMN-MDSCs的铁死会释放免疫抑制的氧化脂质,并抑制T细胞功能.
抑制PMN-MDSC中的铁生长会减少瘤的生长,并与免疫检查点抑制剂协同作用.
在具有免疫能力的宿主中诱导铁致死具有悖论性的促进瘤的进展.

结论:

在PMN-MDSC中的铁死代表了瘤微环境中的新型免疫抑制机制.
向PMN-MDSC中的铁化提供了增强抗瘤免疫力和癌症治疗的潜在策略.
调节铁死是一种限制瘤进展的独特治疗方法.

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