Futurity · Health

Loss of Y Chromosome in Men's Tissues May Signal Early Cancer Risk

A new study suggests that the loss of the Y chromosome in men's body tissue could be an early indicator of cancer development.

Research published in JCI Insights indicates that Y chromosome loss, common in aging men, creates a "field effect" of genetic vulnerability in normal tissue, potentially predisposing it to cancer.

While previous studies linked Y chromosome loss in blood cells to increased disease risk, this study systematically examined its presence across normal, precancerous, and malignant tissues in 11 major human organs.

Scientists observed that Y chromosome loss was present in normal-appearing tissues adjacent to tumors, suggesting it could be one of the earliest signs of cancer formation.

The study analyzed over 4.3 million cell nuclei from 1,000 tissue samples from 405 men, mapping the gradient of Y chromosome loss from normal tissue through to full-blown cancer.

This loss was most pronounced in normal-appearing tissues near cancers of the colon, rectum, esophagus, pancreas, and lung, forming a gradient that increases with proximity to the tumor.

Researchers theorize this gradient could potentially aid doctors in suspecting cancer in biopsies where smaller tumors might be missed.

The study also builds on prior research showing Y chromosome loss in cancer cells can help them evade the immune system, linking it to increased mortality from carcinomas.

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