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News
New research from Huntsman Cancer Institute reveals that obesity may raise breast cancer risk not just by fueling tumor growth, but by eliminating a natural defense. Lean fat cells produce a lipid called 9S-HODE that triggers cancer cell death via ferroptosis — but obese fat cells produce far less of it. Restoring 9S-HODE could become a promising therapeutic strategy.
Scientists at Huntsman Cancer Institute have uncovered a surprising new piece of the obesity-breast cancer puzzle. Rather than only looking at how obesity promotes tumor growth, researchers found that it also removes a natural protection — a lipid called 9S-HODE, produced abundantly by lean fat cells in breast tissue, that triggers a form of cancer cell death known as ferroptosis.
In preclinical models using breast tissue from donors and mouse studies, the team showed that lean adipocytes (fat cells) generate significantly more 9S-HODE than obese ones, making cancerous cells more likely to die in lean tissue. When researchers artificially boosted 9S-HODE levels in obese adipocytes, breast cancer tumor growth was suppressed — pointing to a potentially feasible therapeutic target. Findings were published in the journal Science.
Key Takeaways:
Why it matters: This research reframes how we think about obesity and cancer — it's not just about what obesity adds (inflammation, metabolic dysfunction), but what it takes away. Restoring 9S-HODE could open a new, biologically grounded avenue for breast cancer prevention and treatment in people with obesity.
