Map of breast tissue changes reveals role of menopause in cancer susceptibility

3 days ago

Scientists developed a detailed cellular map of breast tissue aging, showing over 3 million cells.
The map highlights major changes during menopause, including decreased cell numbers and proliferation.
Breast tissue aging creates a microenvironment that allows cancer cells to thrive.
Research used advanced imaging on 500 women aged 15-86, analyzing hormone receptors, immune cells, and tissue structure.
As tissue ages, lobules shrink, ducts become more common, fat cells increase, and blood vessels decrease.
Immune environment shifts: younger breasts have more B and active T cells, while aging sees inflammatory cells dominate.
Cells interact less, with immune and stromal cells distancing from epithelial cells, easing pre-cancerous escape.
Breast cancer risk increases with age due to these cumulative changes, impacting tumor biology.
The study aims to understand immune changes and surveillance of early mutations in milk-secreting cells.

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