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Groundbreaking Study Reveals Genetic Mosaicism in Aging Cells

11/26/2025

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Summary

Story summary

Researchers sequenced genomes of more than 100 individual cells from a 74-year-old man, revealing missing chromosome segments and loss of the Y chromosome.
This effort is part of a $140-million project to catalog mutations across 19 body sites using cells from 150 donors.
The findings underscore mosaicism, where genetic differences within a person can influence cancer and cardiovascular health, highlighting the need for single-cell analysis.

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Story summary

Researchers sequenced genomes of more than 100 individual cells from a 74-year-old man, revealing missing chromosome segments and loss of the Y chromosome.
This effort is part of a $140-million project to catalog mutations across 19 body sites using cells from 150 donors.
The findings underscore mosaicism, where genetic differences within a person can influence cancer and cardiovascular health, highlighting the need for single-cell analysis.