Story perspectives

Stiff breast tissue triggers macrophage DNA-damaging aldehydes

By Drooid · Sep 15, 2026, 3:57 PM UTC · How we work

Summary

UCSF Study Links

UC San Francisco researchers found stiff dense breast tissue triggers macrophages to release DNA-damaging chemicals.
Stiff tumor areas showed more collagen, scarring, STAT3 activation, and higher macrophage infiltration.
Macrophages on stiff gels produced reactive oxygen species that formed aldehydes, damaging nearby DNA.
Researchers aim to block aldehyde formation, noting dense tissue links to advanced disease and 9S-HODE increase suppressed mouse tumor growth.

Summary

UNC Team Builds Model

Researchers built a regression model predicting near-term death in metastatic breast cancer.
The model estimates 30-day and 90-day mortality from labs, vitals, subtype, and meds.
Emily Ray, MD, MPH, of UNC Lineberger Comprehensive Cancer Center led development.
Clinicians hope the tool will trigger timely end-of-life talks, palliative referrals, and aligned care plans.
Researchers plan studies to evaluate the model’s practice integration and decision-making impact.

1 of 2

UCSF Study Links

UC San Francisco researchers found stiff dense breast tissue triggers macrophages to release DNA-damaging chemicals.
Stiff tumor areas showed more collagen, scarring, STAT3 activation, and higher macrophage infiltration.
Macrophages on stiff gels produced reactive oxygen species that formed aldehydes, damaging nearby DNA.
Researchers aim to block aldehyde formation, noting dense tissue links to advanced disease and 9S-HODE increase suppressed mouse tumor growth.

1 / 2