Researchers have extended the lifespan of C. elegans roundworms by 500%, roughly equivalent to 400–500 years in humans.
Who wouldn't want to live longer and healthier? To uncover aging mechanisms, scientists often study Caenorhabditis elegans (C. elegans) nematodes. These tiny organisms share key cellular pathways with humans and have a short lifespan of just 3–4 weeks, allowing rapid testing of longevity interventions.
This study genetically targeted two conserved pathways: the insulin/IGF-1 signaling (IIS) pathway and the target of rapamycin (TOR) pathway, both present in humans and previously linked to aging.
Modifying IIS alone extended lifespan by 100%; TOR modification added 30%. Researchers anticipated a combined 130% increase through simple addition.
Instead, the synergy yielded a staggering 500% extension.
"The synergistic effect is truly remarkable," says lead author Jarod Rollins from the Mountain Desert Biological Laboratory (USA). "To develop the most effective anti-aging treatments, we must target longevity networks, not just isolated pathways."
This may explain why no single gene has been found to dramatically extend human life. Combined interventions (with drugs already in development) offer a new direction, though more research is essential.
"While C. elegans pathways regulating aging are known, their interactions remain unclear," notes co-author Hermann Haller. "Characterizing these could lead to therapies enhancing lifespan and healthspan in aging populations."
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