Changes to one enzyme alter lifespan and growth in worms
Gene-edited Caenorhabditis elegans worms showed that different changes to a signaling enzyme had distinct effects on lifespan, body size and development.
Our read
Mechanisms- Studied:
- Experiments in Caenorhabditis elegans worms
- What changed:
- One enzyme mutation shortened lifespan in worms
- The catch:
- The Ras mutation's intended protein-contact effects were uncertain and potentially incomplete or nonselective
- In the record:
- One of 73 papers on age-1 on record: none yet with results in people, 11 in animals.
- Why it’s aging research:
- It measures how long life or healthy life lasts.
Editor of record: Boris Djordjevic · AgingResearch.News
In experiments in Caenorhabditis elegans worms, researchers used CRISPR gene editing to change selected parts of AGE-1, an enzyme involved in signals controlling lifespan, metabolism and growth. Models of the enzyme’s structure guided their edits.
One mutation, thought likely to keep the enzyme active, markedly shortened lifespan. Other mutations, designed to disrupt contact between AGE-1 and Ras, a signaling protein, produced larger worms and reduced entry into dauer, a paused stage of larval development. The authors proposed that signals from Ras to AGE-1 restrain body growth and promote this pause, contrary to standard models of insulin-related signaling. Together, the different mutations showed that changes to one enzyme can have distinct effects on lifespan, growth and development.
Why it matters
Lifespan control involves signaling systems that also govern growth and development. The authors’ approach offers a way to investigate how these different roles depend on an enzyme’s structure.
Caveats
These experiments tested genetically altered worms, not people. The mutations’ intended effects on protein contact remained uncertain, and the authors cautioned that the Ras mutation might not act completely or selectively.
The paper
Texas A&M Health Science Center
Aging Cell, Jun 2026, Open access
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