# Stress Response Trade-Off: Less ATF4 Activity May Extend Lifespan in Flies

*Suppression rather than activation of the integrated stress response (GCN2-ATF4) pathway extends lifespan in the fly.*

- **Evidence Level**: Preliminary
- **Publication Types**: Journal Article
- **Journal**: Proceedings of the National Academy of Sciences of the United States of America
- **Sample Size**: Fruit flies (Drosophila), number not specified
- **Authors**: Götz MS, Hayman DJ, Adams G, Obata F, Simons MJP
- **Published**: 2026-04-28
- **Topics**: stress response, longevity pathways, fruit flies
- **DOI**: https://doi.org/10.1073/pnas.2518812123
- **Original Source**: https://pubmed.ncbi.nlm.nih.gov/42048457/

## Summary

Scientists used to think turning on the body's stress response made organisms live longer. But in fruit flies, the opposite was true. When researchers dialed down a key stress pathway called GCN2-ATF4, flies lived longer. Cranking it up shortened their lives. This complicates the popular idea that all forms of cellular stress activation are good for aging.

## Practical Takeaway

This study suggests stress response pathways may help or harm lifespan depending on how active they are.

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_Canonical: https://longevity-switzerland.com/en/research/stress-response-trade-off-less-atf4-activity-may-extend-lifespan-in-flies · Part of Longevity Cities · Updated 2026-04-28_