Endocrine disrupting chemicals and breast cancer: a systematic review of epidemiological studies

• Published in: Critical reviews in food science and nutrition Vol. 62; no. 24; pp. 6549 - 6576
• Main Authors: Wan, Murphy Lam Yim, Co, Vanessa Anna, El-Nezami, Hani
• Format: Journal Article
• Language: English
• Published: United States Taylor & Francis 2022; Taylor & Francis Ltd
• Subjects: Arbetsmedicin och miljömedicin; Atrazine; Biomarkers; Bisphenol A; Breast cancer; Consumer products; Contraceptives; DDE; DDT; dietary; Dioxins; Disruption; Endocrine disruptors; endocrine-disrupting chemicals; environmental; Environmental assessment; Environmental Health and Occupational Health; epidemiological studies; Epidemiology; Ethers; Evaluation; Exposure; Food; Food packaging; Genistein; Health risks; Health Sciences; Herbicides; Hälsovetenskap; Medical and Health Sciences; Medicin och hälsovetenskap; Mycotoxins; Nitrous oxide; PCB; Perfluoroalkyl & polyfluoroalkyl substances; Pesticides; Phytoestrogens; Polybrominated diphenyl ethers; Polychlorinated biphenyls; Resveratrol; Reviews; Systematic review; TCDD; Zearalenone; Breast cancer; environmental; epidemiological studies; systematic review; dietary; endocrine-disrupting chemicals
• ISSN: 1040-8398; 1549-7852
• DOI: 10.1080/10408398.2021.1903382

Endocrine-disrupting compounds (EDCs) are ubiquitous substances that are found in our everyday lives, including pesticides, plasticizers, pharmaceutical agents, personal care products, and also in food products and food packaging. Increasing epidemiological evidence suggest that EDCs may affect the development or progression of breast cancer and consequently lead to lifelong harmful health consequences, especially when exposure occurs during early life in humans. Yet so far no appraisal of the available evidence has been conducted on this topic. To systematically review all the available epidemiological studies about the association of the levels of environmental exposures of EDCs with breast cancer risk. The search was performed in accordance with the PRISMA guidelines. We retrieved articles from PubMed (MEDLINE) until 10 March 2021. The key words used in this research were: "Endocrine disruptor(s)" OR "Endocrine disrupting chemical(s)" OR any of the EDCs mentioned below AND "Breast cancer" to locate all relevant articles published. We included only cohort studies and case-control studies. All relevant articles were accessed in full text and were evaluated and summarized in tables. We identified 131 studies that met the search criteria and were included in this systematic review. EDCs reviewed herein included pesticides (e.g. p,p'-dichlorodiphenyltrichloroethane (DDT), p,p'-dichlorodiphenyldichloroethylene (DDE), atrazine, 2,3,7,8-tetrachloridibenzo-p-dioxin (TCDD or dioxin)), synthetic chemicals (e.g. bisphenol A (BPA), phthalates, per- and polyfluoroalkyl substances (PFAS), parabens, polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), contraceptive pills), phytoestrogens (e.g. genistein, resveratrol), and certain mycotoxins (e.g. zearalenone). Most studies assessed environmental EDCs exposure via biomarker measurements. We identified certain EDC exposures could potentially elevate the risk of breast cancer. As majority of EDCs are highly persistent in the environment and bio-accumulative, it is essential to assess the long-term impacts of EDC exposures, especially multi-generational and transgenerational. Also, since food is often a major route of exposure to EDCs, well-designed exposure assessments of potential EDCs in food and food packing are necessary and their potential link to breast cancer development need to be carefully evaluated for subsequent EDC policy making and regulations.