Greenland Shark Genome Reveals 500-Year Lifespan Clues and Tumor-Suppression Pathways
Updated
Updated · Nautilus · May 28
Greenland Shark Genome Reveals 500-Year Lifespan Clues and Tumor-Suppression Pathways
3 articles · Updated · Nautilus · May 28
Summary
A new genome analysis in PNAS links the Greenland shark’s extreme longevity to a layered genetic system rather than a single anti-aging mechanism.
Researchers found the shark has fewer H2AC20 and HSPA8 genes—families usually tied to longevity—suggesting a “low-maintenance-cost” strategy shaped by frigid waters and very slow metabolism.
The genome also showed expanded gene sets tied to immune regulation and ferroptosis, a programmed cell-death pathway that helps suppress tumors despite the shark’s unusually large genome.
That combination offers a new angle on Peto’s paradox: a vertebrate that can live nearly 500 years without the expected rise in cancer risk from having so much genetic material.
Why does the world's longest-living animal have fewer 'longevity' genes than expected?
Could the Greenland shark's cancer-fighting secrets lead to a new generation of human therapies?
The 400-Year Genome: How the Greenland Shark’s DNA Unlocks the Mysteries of Aging and Disease
Overview
In June 2026, scientists achieved a major breakthrough by successfully assembling the Greenland shark’s genome at the chromosome level. This remarkable feat, made possible by advances in DNA sequencing and computational biology, allowed researchers to map the shark’s entire genetic blueprint and organize its DNA onto individual chromosomes. The detailed genetic map now reveals important clues about how the Greenland shark can live up to 400 years, offering unprecedented insights into the biological mechanisms behind its extreme longevity. Understanding these genetic secrets could have a profound impact on future research into human aging and age-related diseases.