A collaboration between the Max Planck Institute for Biology of Ageing and University College London demonstrates that trametinib inhibits RAS/Mek/Erk and rapamycin blocks mTORC1, and together these drugs additively extend healthspan and lifespan in C3B6F1 mice by reducing tumors, inflammation, and age-related metabolic decline.
Key points
- Oral trametinib at 1.44 mg/kg diet extends median lifespan by ~10% in male and ~7% in female C3B6F1 mice.
- Intermittent rapamycin dosing (42 mg/kg weekly) combined with trametinib yields additive median lifespan gains of 27–35%.
- Combination therapy reduces liver and spleen tumor incidence, blocks age-related brain glucose uptake increases, and lowers systemic pro-inflammatory cytokines.
Why it matters: Dual targeting of RAS/Mek/Erk and mTORC1 pathways offers a promising additive gerotherapeutic strategy with translational potential to enhance mammalian healthspan beyond single-drug approaches.
Q&A
- What are geroprotectors?
- How does trametinib work against aging?
- Why combine trametinib with rapamycin?
- What mouse model was used and why?