Bisphenol mixture alters human breast organoid development
Published in Biology, Diseases!, Journals.
Published October 16, 2026.
Researchers at Tufts University and Boston University report that a mixture of three bisphenols altered the development of human breast organoids. The findings, described by Tufts on October 15 and published in PNAS, offer a laboratory approach to studying environmental exposures before disease develops.
The team grew three-dimensional tissue models from breast cells donated by 13 healthy young women. During roughly three weeks of development, they tested individual chemicals and mixtures and examined tissue growth, gene activity and DNA modifications.
BPA, BPS and BPF individually produced relatively few changes. Together, at low concentrations comparable to levels measured in human blood and urine, they disrupted development in organoids from most donors.
The resulting molecular pattern overlapped with patterns in human breast cancer datasets, particularly invasive lobular carcinoma.
Important limitation: This experiment does not demonstrate that these chemicals cause breast cancer, quantify an individual’s cancer risk or establish a screening test. Further studies must determine whether these laboratory changes predict disease.
Sources: Tufts University, October 15, 2026; PNAS research paper.