Researchers in this study wanted to understand how social and economic stress, along with genetic ancestry, may affect normal breast tissue in ways that influence breast cancer risk. While differences in breast cancer outcomes across populations are well known, the biological reasons behind these differences are not fully understood.
To investigate this, the researchers analyzed normal breast tissue samples from women at higher risk for breast cancer, focusing on differences between women of African ancestry and European ancestry. They studied specific molecular features called N-glycans, which are sugar molecules attached to proteins that help control cell communication, immune responses, and tissue behavior.
The researchers found that patterns of these N-glycans differed based on genetic ancestry. In addition, these molecular patterns were linked to socioeconomic factors, such as income and marital status, suggesting that life experiences and stress may influence biological processes in the breast.
They also found that some of these molecular patterns in normal tissue were similar to those seen in cancer, especially in women of African ancestry. This suggests that certain biological changes linked to both ancestry and stress may create a tissue environment that is more favorable for cancer development.
