在衰老过程中,内在色素的变化具有倾向于耗尽肠道干细胞的倾向
Saki Tomita-Naito1,2, Shivakshi Sulekh1,3, Sa Kan Yoo1,3,4
1Laboratory for Homeodynamics, RIKEN BDR, Kobe, Japan.
iScience
|October 7, 2024
概括
衰老的组织干细胞可能会耗尽. 这项研究揭示了染色体和基因表达的变化,特别是涉及类似Trithorax的点,有助于在衰老过程中消耗肠道干细胞.
科学领域:
- 细胞和分子生物学 细胞和分子生物学
- 衰老研究研究 衰老研究
- 干细胞生物学 干细胞生物学
背景情况:
- 在衰老过程中,由于干细胞的增殖或耗尽,组织稳态被破坏.
- 衰老涉及染色体结构和基因表达的无声变化,这并不总是反映在表型中.
- 肠道干细胞 (ISC) 对于肠道再生至关重要,并受到衰老的影响.
研究的目的:
- 为了研究肠道原生细胞中染色质可访问性和基因表达的与年龄相关的变化.
- 为了确定在衰老过程中肠干细胞 (ISC) 枯竭背后的分子机制.
- 探索特里托拉克斯类 (Trl) 基因在ISC衰老和疲劳中的作用.
主要方法:
- 在衰老的肠道原生细胞中分析染色质可访问性和基因表达.
- 在ISC中调查类似Tritorax (Trl) 和其向基因 (ced-6,ci) 的功能.
- 实验性抑制Trl,ced-6,或ci,以评估对ISC功能的影响.
主要成果:
- 在肠道原生细胞中发现了染色质可访问性和基因表达的与年龄相关的变化.
- 特定的Trithorax-like (Trl) 向基因 ced-6 和 ci 随着年龄的增长显示出表达减少和染色质凝聚.
- 抑制Trl,ced-6,或ci导致肠干细胞 (ISC) 的耗尽.
结论:
- 衰老会诱导染色体和基因表达的改变,使肠道干细胞易于疲.
- 甲状腺样 (Trl) 路径及其目标 ced-6 和 ci 在老化过程中在维持 ISC 功能方面发挥着至关重要的作用.
- 这些发现为与年龄相关的干细胞功能障碍的分子基础提供了新的见解.
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