Senescent cells may be both harmful and protective, review finds
The Story
A review published May 4, 2026, in Aging-US indicates that senescent cells, long viewed as harmful, can also support wound healing and tissue repair. Researchers are now exploring precision anti-aging therapies that remove only harmful senescent cells while preserving beneficial ones.
Key Facts
- Senescent cells are cells that have permanently stopped dividing and have been linked to age-related diseases.
- They can release inflammatory molecules harmful to tissue, but some appear to support wound healing, tissue balance, and embryonic development.
- The review highlights cellular senescence in liver, lungs, kidneys, heart, brain, skin, and fat tissue.
- Senescent cells are highly diverse; some limit fibrosis and assist repair, while others fuel chronic inflammation, metabolic disorders, tissue degeneration, and cancer progression.
- Early senolytic drugs include dasatinib, quercetin, and fisetin.
- New approaches include CAR-T cell immunotherapies and senomorphic therapies that reduce the harmful senescence-associated secretory phenotype (SASP).
- Precision geroprotection aims to remove only maladaptive senescent cells.
- Challenges include lack of specific biomarkers, delivery difficulties, and potential interference with tissue repair, immune surveillance, and organ integrity.
- Authors: Jian Deng (first author) and Dong Yang (corresponding author), West China Hospital, Sichuan University.
Conflicting Reports
No conflicting reports identified in the source article.
Still Unclear
How senescent cell populations change over time in different organs is not fully understood, making long-term treatment effects difficult to predict.
Misconceptions
No widespread misconceptions addressed in the source article.
Key Figures
- Jian Deng, first author, Department of Targeting Therapy and Immunology, Cancer Center, West China Hospital, Sichuan University
- Dong Yang, corresponding author, same department
Sources: ScienceDaily
