Chromatin modifications at telomeres determine whether cancer cells activate telomerase or alternative lengthening pathways for DNA maintenance. Understanding these molecular switches creates opportunities to target ALT-dependent cancers through chromatin-based interventions.
Key Points
- Telomeric chromatin structure determines cancer cell's telomere maintenance pathway choice
- ALT state becomes self-sustaining through coupled feedforward loop mechanisms
- Chromatin manipulation offers therapeutic strategy to disrupt ALT cancer cell survival
Longevity Analysis
Telomere length directly constrains cellular replication capacity and tissue regeneration. Cancer cells bypass this constraint by hijacking telomere maintenance pathways, but the epigenetic decisions governing which pathway a cell adopts remain addressable targets. By decoding how chromatin structure locks cancer cells into ALT-dependent survival, researchers can design interventions that specifically destabilize this choice without affecting normal telomere-dependent aging in healthy tissue. This shifts cancer strategy from broad cytotoxicity toward precision disruption of the specific mechanisms cancer cells depend on to proliferate indefinitely.
Original published by Wiley Aging Cell, by Jie Wang, Yuehui Su, Chao Chen, Yueying Li, Jiajia Han, Liping Du, Liyun Zheng, Ya‐Long Dang, Ying Peng .