Research Results
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2022
Crit Rev Food Sci Nutr
A systematic review of 131 epidemiological studies examining endocrine-disrupting chemicals (EDCs) and breast cancer risk found evidence that exposure to various EDCs—including pesticides (DDT/DDE, atrazine, dioxin), synthetic chemicals (BPA, phthalates, PFAS, PCBs, PBDEs), and other compounds found in everyday products—may elevate breast cancer risk, particularly when exposure occurs during early life. The review identified food as a major route of EDC exposure and emphasized that because most EDCs persist in the environment and accumulate in the body over time, long-term multi-generational health impacts need to be assessed. The authors call for improved exposure assessments of EDCs in food and food packaging, along with careful evaluation of their links to breast cancer development to inform policy-making and regulations aimed at protecting public health.
2024
Ecotoxicol Public Health
A case-control study of 758 women in southwestern Paraná, Brazil—a region with intensive pesticide use and 41% higher breast cancer rates than the national average—found that even women not working in fields but handling contaminated equipment and laundry tested positive for Glyphosate, atrazine, and 2,4-D. While the overall breast cancer risk association with pesticide exposure was non-significant after adjustment (OR = 1.30), exposed women had significantly higher risk of lymph node metastasis (OR = 2.19; 95% CI: 1.31-3.72), indicating more aggressive disease. These findings suggest pesticide exposure in agricultural communities may be associated with development of more aggressive breast cancer, highlighting the need for monitoring both occupational and household pesticide exposure in rural populations.
2022
Crit Rev Food Sci Nutr
This systematic review of 131 epidemiological studies evaluated the association between various endocrine-disrupting chemicals, including phthalates and hormonal exposures like contraceptive pills, and the risk of breast cancer. It found that several EDCs, particularly phthalates and oral contraceptive use, were consistently associated with increased breast cancer risk across multiple studies.
2020
Mol Cell Endocrinol
A review of EPA pesticide registration documents found that 28 pesticides cause mammary tumors in animals and five alter mammary gland development, yet the agency’s risk assessments often dismiss these findings or don’t evaluate their implications for breast cancer risk. Many of these pesticides work through hormone-disrupting pathways that could affect breast tissue, including common chemicals like malathion, atrazine, and triclopyr. The authors argue that current testing guidelines don’t adequately assess effects on the mammary gland and call for re-evaluation of several widely-used pesticides based on stronger standards informed by breast cancer biology.
2015
Carcinogenesis
A review examining the intersection of environmental toxicants, immune function, and cancer development argues that common chemicals like bisphenol A, atrazine, and phthalates can disrupt the delicate balance between pro- and anti-inflammatory immune responses, potentially contributing to tumor development through immune system dysfunction. The authors highlight that while the role of immunity in cancer is well-established, research on how environmental chemicals affect immune cells as co-factors in cancer causation remains underdeveloped compared to studies on autoimmunity and allergies. The review calls for increased research using systems biology approaches to better understand how chemical exposures disturb inflammatory pathways and immune molecules involved in tumor-associated inflammation, arguing that chemically induced immune perturbations represent an important but understudied mechanism of environmental carcinogenesis.