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RORγ桥梁癌症驱动的脂质代谢不良和骨髓状细胞免疫抑制

Augusto Bleve¹, Martina Incerti², Francesca Maria Consonni³

¹IRCCS Humanitas Research Hospital, Rozzano, Italy.

Cancer discovery

|March 11, 2025

概括

这项研究表明,高胆固醇和癌症激活RORγ,促进免疫抑制和瘤生长. 通过抑制PCSK9降低胆固醇阻断了这种途径,增强了抗瘤免疫力.

科学领域:

免疫代谢过程中的免疫代谢.
在瘤学瘤学.
脂质代谢脂质代谢是什么

背景情况:

瘤发育涉及代谢和造血变化,但免疫代谢交叉点的理解很差.
与视网膜酸相关的孤儿受体玛 (RORγ) 将脂质代谢与与癌症相关的骨髓形成联系起来.
高胆固醇血症与失调的骨髓形成有关,这表明脂质乱在癌症进展中的作用.

研究的目的:

研究RORγ在调解高胆固醇和癌症对免疫细胞影响中的作用.
阐明脂质代谢影响瘤相关免疫抑制的机制.
确定针对癌症中RORγ-脂质代谢轴的治疗策略.

主要方法:

利用临床前癌症模型和患者数据.
研究了癌症和高胆固醇饮食对RORγ活性和免疫细胞群 (MDSC,TAM) 的影响.
研究了IL-1β,IL-6和PCSK9在调节肝脏基因表达和胆固醇水平中的作用.
评估了PCSK9抑制对瘤进展和抗瘤免疫力的影响.

主要成果:

癌症和高胆固醇饮食独立地或共同激活RORγ,导致髓质衍生抑制细胞 (MDSC) 扩张和M2极化瘤相关巨细胞 (TAM) 积累.
瘤诱导的IL-1β和IL-6促进肝脏PCSK9的表达.
抑制降低胆固醇的PCSK9,以RORγ依赖的方式防止MDSC扩张和M2 TAM积累.
降低胆固醇水平释放出特定的抗瘤免疫力,并抑制瘤的进展.

结论:

RORγ作为一个关键的传感器,将脂质疾病,特别是高胆固醇血症与前瘤骨髓形成联系起来.
RORγ-PCSK9轴代表了由代谢变化驱动的癌症免疫逃避的关键途径.
向PCSK9降低胆固醇水平提供了一种潜在的治疗策略,以增强抗瘤免疫力和打击癌症进展.

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