Title:Endocrine-Disrupting Chemicals: Introduction to the Theme
Volume: 22
Issue: 7
Author(s): Giuseppe Lisco, Vito Angelo Giagulli, Michele Iovino, Edoardo Guastamacchia, Giovanni De Pergola and Vincenzo Triggiani*
Affiliation:
- Interdisciplinary Department of Medicine-Section of Internal Medicine, Geriatrics, Endocrinology and Rare Diseases,
University of Bari “Aldo Moro”, School of Medicine, Policlinico, Piazza Giulio Cesare 11, 70124 Bari, Italy
Keywords:
Endocrine disruptors, bisphenol A, dioxins, polycyclic aromatic hydrocarbons, polychlorobiphenyls, phthalates, paraben.
Abstract:
Background: Endocrine-disrupting chemicals (EDCs) are natural or synthetic compounds
deriving from different human activities and are widely spread into the environment, contributing
to indoor and outdoor pollution. EDCs may be conveyed by food and water consumption
and skin, airways, placental, and breastfeeding. Upon entering the circulation, they can interfere
with endocrine system homeostasis by several mechanisms.
Aim: In this narrative review, the authors overviewed the leading mechanisms by which EDCs interact
and disrupt the endocrine system, leading to possible human health concerns.
Results: The leading mechanisms of EDCs-related toxicity have been illustrated in in vitro studies
and animal models and may be summarized as follows: receptor agonism and antagonism; modulation
of hormone receptor expression; interference with signal transduction in hormone-responsive
cells; epigenetic modifications in hormone-producing or hormone-responsive cells; interference
with hormone synthesis; interference with hormone transport across cell membranes; interference
with hormone metabolism or clearance; interference with the destiny of hormone-producing or hormone-
responsive cells.
Discussion: Despite these well-defined mechanisms, some limitations do not allow for conclusive
assumptions. Indeed, epidemiological and ecological studies are currently lacking and usually refer
to a specific cluster of patients (occupational exposure). Methodological aspects could further complicate
the issue since these studies could require a long time to provide useful information. The
lack of a real unexposed group in environmental conditions, possible interference of EDCs mixture
on biological results, and unpredictable dose-response curves for some EDCs should also be considered
significant limitations.
Conclusion: Given these limitations, specific observational and long-term studies are needed to
identify at-risk populations for adequate treatment of exposed patients and effective prevention
plans against excessive exposure to EDCs.