Caffeine Activates AMPK Energy Sensor Linked to Slower Aging — SkimNews
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- Queen Mary University of London researchers found caffeine activates AMPK, a cellular energy sensor conserved across species for over 500 million years — a surprise since the same group previously tied caffeine to TOR signaling instead.
- The study, published in Microbial Cell in 2025, used fission yeast, a single-celled organism sharing key biological features with human cells and sometimes called a "mini-human" in basic biology research.
- AMPK acts as a cellular "fuel gauge," triggering stress responses, DNA repair, and growth regulation when energy runs low — processes central to how cells age.
- Metformin, the widely used diabetes drug being investigated for longevity, targets the same AMPK pathway alongside rapamycin.
- Dr. Charalampos (Babis) Rallis, the study's senior author at Queen Mary University of London, said caffeine "helps flip that switch" for AMPK activation in cells.
- The fission yeast experiments do not prove coffee extends human lifespan, the researchers cautioned, since simple-organism results don't always translate directly to people.
Why it matters: For longevity researchers, this study reframes caffeine as a candidate AMPK activator — the same pathway metformin and rapamycin target — turning a morning habit into a concrete lead for diet, lifestyle, or drug interventions aimed at stress resistance and DNA repair. Human trials remain absent, but the 500-million-year conservation of the pathway makes it a credible next research target.
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