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胆固醇肝炎改变了淋巴细胞的细胞毒性和局部化,加速了结直肠肝转移
Adi S Yehezkel1, Eyal Yehezkel2, Nathalie Abudi1
1The Goldyne Savad Institute of Gene Therapy, Hadassah Medical Center and faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel; The Wohl Institute for Translational Medicine, Hadassah Hebrew University Medical Center, Ein Karem, 91120, Jerusalem, Israel.
Neoplasia (New York, N.Y.)
|August 29, 2025
概括
饮食引起的代谢功能障碍会改变肝脏免疫力,促进结肠直肠癌的转移. 在代谢功能障碍相关的脂肪肝疾病 (MAFLD) 中调节免疫细胞功能可能为肝转移提供治疗策略.
科学领域:
- 免疫学
- 癌症学
- 肝病学
背景情况:
- 代谢功能障碍相关的脂肪肝病 (MAFLD) 是一个全球性的健康问题,也是结直肠癌 (CRC) 肝转移 (CRLM) 的风险因素.
- 了解MAFLD中对代谢压力的肝免疫细胞反应对于破译早期CRLM发展至关重要.
研究的目的:
- 研究由高脂肪饮食 (HFD) 和西方饮食 (WD) 诱导的MAFLD如何改变肝脏免疫细胞群和表型.
- 确定这些免疫变化对结直肠癌肝转移 (CRLM) 的早期影响.
主要方法:
- 在小鼠中使用HFD和WD建立MAFLD和MASH模型.
- 通过内注射MC38癌细胞诱导了CRLM.
- 使用单细胞RNA测序 (scRNA-seq),RT-PCR和免疫组织学来分析肝脏免疫细胞的组成,功能和局部.
主要成果:
- 这两种饮食都促进了CRLM的建立.
- 通过增加IL-10和TGF-β1,WD诱导了免疫抑制环境,抑制了细胞毒性CD8+T细胞和NK细胞.
- 在MASH中,虽然CD8+T和NK细胞增加,但它们的透到瘤和细胞毒性功能受损. 在MASH模型中CD8+T细胞枯竭增强了NK细胞透和细胞毒性杀死.
结论:
- 饮食引起的肝免疫变化显著影响CRLM的进展.
- 在肝转移中免疫细胞的共同定位极大地影响了它们的功能.
- 针对免疫细胞衰竭和激活为CRLM提供了潜在的治疗途径.
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