在MASLD和HCC的进展中,B细胞子集的重要作用
Nataliia Petriv1, Huizhen Suo1, Inga Hochnadel1
1Department of Gastroenterology, Hepatology, Infectious Diseases and Endocrinology, Hannover Medical School (MHH), Hannover, Germany.
这项研究确定了特定的B细胞子集,这些B细胞子集在代谢功能障碍相关的脂肪性肝病 (MASLD) 中驱动肝癌的进展. 针对这些B细胞,特别是IgM+IgD+调节性B细胞 (Bregs),为肝细胞癌 (HCC) 提供了一个有前途的新治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 肝病学 肝病学是一种肝病学.
- 在瘤学瘤学.
背景情况:
- 肝细胞癌 (HCC) 是癌症死亡的主要原因,代谢功能障碍相关的脂肪性肝病 (MASLD) 是一个重要的风险因素.
- 目前对HCC的治疗方法有限,B细胞越来越被认为是MASLD向HCC进展的关键因素.
研究的目的:
- 定义特定的原始B细胞子集,参与MASLD向HCC的进展.
- 通过了解B细胞在肝脏疾病中的作用来探索潜在的新治疗点.
主要方法:
- 利用多色流细胞计,免疫组织化学和免疫光学来分析小鼠模型中的B细胞种群和患有MASLD和HCC的人类患者.
- 研究了局部 (肝脏组织) 和全身 (血液) B 细胞区.
- 在小鼠中评估了B细胞枯竭与疫苗结合的治疗潜力.
主要成果:
- 在患有MASLD和HCC的小鼠的肝脏中发现了两种调节性B细胞 (Breg) 子集 (CD19+B220+CD5+CD1d+和CD19-B220+CD5+CD1d-) 的增加,这些子集过度表达IgM/IgD,PD-L1和IL-10.
- 在人类HCC中观察到CD19+CD5+IL-10+,CD19+CD5+PD-L1+,CD19+CD5+IgM+IgD+B细胞以及非切换记忆B细胞和血清细胞的水平升高.
- 在患有MASLD的患者血液中发现了表达IL-10和IgM/IgD的B细胞总数增加,以及特定的Breg和非切换记忆B细胞子集.
结论:
- 特定的B细胞子集,特别是表达PD-L1和IL-10的IgM+IgD+Bregs,在与MASLD相关的HCC中起着原发性作用.
- B细胞枯竭疗法在HCC模型中显示出改善生存的潜力.
- 这些发现突出了B细胞作为减轻肝病进展的潜在治疗点.
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