An international team screened 66 natural metabolites and identified apigenin as a senomorphic flavonoid that suppresses the pro-inflammatory secretory phenotype of senescent cells by binding to PRDX6 and modulating HSPA8 activity. In cell and mouse models, apigenin reduced SASP factors, enhanced chemotherapeutic cytotoxicity, and improved physical and cognitive markers in prematurely aged mice.
Key points
- Apigenin binds PRDX6 to inhibit PLA2 activity, reducing arachidonic acid-mediated pro-inflammatory signaling.
- Disruption of HSPA8 interaction attenuates ATM–p38MAPK and PI3K/Akt/mTOR pathways, suppressing SASP factor secretion in senescent cells.
- In murine xenograft and irradiation-induced aging models, apigenin enhances chemotherapeutic apoptosis, reduces tumor burden, and reverses age-related functional decline.
Why it matters: By inhibiting PRDX6-driven SASP, apigenin offers a novel senotherapeutic strategy that enhances chemotherapy efficacy and mitigates age-related decline.
Q&A
- What is the senescence-associated secretory phenotype (SASP)?
- How does PRDX6 contribute to inflammation in senescent cells?
- What distinguishes senomorphic from senolytic compounds?
- What experimental models validated apigenin’s effects?
- Are there safety or toxicity concerns with apigenin?