素5ac通过前体细胞的表观遗传重编程来调节与癌症相关的纤维细胞异质性
Rachel J Kehrberg1, Namita Bhyravbhatla1, Zahraa W Alsafwani1
1Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska, United States.
American journal of physiology. Cell physiology
|November 6, 2025
概括
在胰腺癌中,Muc5ac驱动前体细胞,如脂肪衍生的介质干细胞,成为癌症相关纤维细胞 (CAF). 这项研究定义了前体细胞对CAF异质性的贡献,为胰腺癌治疗提供了新的点.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
背景情况:
- 胰腺癌 (PC) 标志着脱和与癌症相关的异质纤维细胞 (CAF).
- 来自不同前体细胞的CAF异质性的起源尚不清楚.
- Muc5ac在调节前体细胞分化成CAF子集中的作用尚不清楚.
研究的目的:
- 通过分化前体细胞,研究Muc5ac如何影响CAF异质性.
- 为了确定脂肪衍生的中干细胞 (AD-MSCs),骨髓衍生的MSCs (BM-MSCs) 和胰腺恒星细胞 (PSCs) 对CAF群体的贡献.
- 探索参与CAF前体细胞成熟的功能程序和表观遗传修饰.
主要方法:
- 暴露于Muc5ac富含或缺乏癌细胞条件介质的前体细胞的RNA测序.
- 对在分化前体细胞中的表观遗传调节剂 (Dnmts,Tets,H3K27乙化) 的分析.
- 转录组,基因本体学 (GO) 和KEGG通路分析以确定前体细胞贡献和功能程序.
- 在本土的小鼠模型中验证,并在患者队列中进行相关性分析.
主要成果:
- Muc5ac显著改变了AD-MSC的转录特征,促进了炎症 (iCAF) 和肌纤维细胞 (myCAF) 现型.
- 在AD-MSC中,Muc5ac调节的表观遗传调节剂 (Dnmts,Tets) 和在PSC中增加的H3K27乙化.
- 在CAF人群中,AD-MSC占最大比例 (44.4%),其次是PSC (31.5%) 和BM-MSC (21.6%).
- 为每个前体细胞类型确定了不同的功能程序,这有助于CAF异质性.
- 观察到AD-MSC成熟的年龄相关特征,年轻患者的INHBA和MUC5AC水平之间存在相关性.
结论:
- AD-MSC,BM-MSC和PSC本质上分化为不同的CAF亚型,有助于胰腺癌异质性.
- Muc5ac在调节前体细胞分化方面发挥着关键作用,特别是推动AD-MSCs主导CAF群体.
- 了解前体细胞特异性CAF程序为选择性向促进瘤的CAF提供了一个框架.
- 这项研究提供了一种潜在的策略,以加强胰腺癌的侧向向疗法.
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