结肠炎的克隆记忆积累并促进瘤生长
bioRxiv : the preprint server for biology
|March 3, 2025
概括
慢性炎症在结肠干细胞中留下了表观遗传记忆,增加了癌症风险. 这种记忆是由激活蛋白1 (AP-1) 活动驱动的,加速瘤生长,并建议新的治疗点.
科学领域:
- 胃肠病学 胃肠病学
- 在瘤学瘤学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 慢性炎症是已知的癌症风险因素之一.
- 关联炎症与癌症的分子机制尚未完全理解.
- 结肠干细胞在组织再生和癌症发展中起着至关重要的作用.
研究的目的:
- 研究慢性炎症导致癌症发展的分子机制.
- 了解结肠干细胞如何保留炎症的记忆.
- 确定潜在的治疗点,以减轻炎症条件下的癌症风险.
主要方法:
- 开发一种新的单细胞方法,SHARE-TRACE,用于同时分析基因表达,染色体可访问性和克隆史.
- 利用大肠炎的小鼠模型来研究结肠干细胞中炎症诱导的表观遗传变化.
- 激活蛋白1 (AP-1) 转录因子活性及其在干细胞记忆中的作用的分析.
主要成果:
- 结肠干细胞保留了炎症的表观遗传记忆,其特征是激活蛋白1 (AP-1) 活性增加.
- 炎症记忆是通过细胞内在传播的,并通过干细胞血统传承的.
- 大肠炎主要是干细胞,导致放大再生基因程序,并在瘤突变后加速瘤生长,其中一组瘤显示出高AP-1活性.
结论:
- 由于慢性炎症,结肠干细胞的表观遗传变化提供了与恶性瘤的机械联系.
- 在再生组织中长期存在的表观遗传记忆可以增加对癌症的易感性.
- 研究结果表明,在患有慢性炎症疾病的患者中,有潜在的治疗策略来降低癌症风险.
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