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08:28
Assessment of the Effects of Endocrine Disrupting Compounds on the Development of Vertebrate Neural Network Function Using Multi-electrode Arrays
Published on: April 26, 2018
Evaluating the effects of endocrine disruptors on endocrine function during development
R Bigsby1, R E Chapin, G P Daston
1Indiana University School of Medicine, Indianapolis, Indiana, USA.
Environmental Health Perspectives
|July 28, 1999
Summary
Endocrine disruptors pose significant risks to developing embryos and fetuses by interfering with crucial hormonal systems. Exposures during development can lead to irreversible effects on organ development and function.
Area of Science:
- Environmental Toxicology
- Developmental Biology
- Endocrinology
Background:
- Endocrine-disrupting chemicals (EDCs) are a major environmental concern, primarily due to observed effects on developing organisms.
- Key hormonal systems, including estrogens, androgens, and thyroid hormones, play critical roles in normal development.
- These systems are known to be vulnerable to perturbation by EDCs, particularly during sensitive developmental windows.
Purpose of the Study:
- To review and synthesize current knowledge on the disruption of estrogen, androgen, and thyroid hormone systems by EDCs during development.
- To highlight the heightened sensitivity of developing organs to low-level EDC exposure compared to adults.
- To discuss critical issues in risk assessment, including developmental sensitivity, irreversible consequences, and dose-response relationships.
Main Methods:
- Literature review and synthesis of existing experimental data on endocrine disruptors and developmental effects.
- Focus on well-characterized hormonal systems (estrogens, androgens, thyroid hormones) and their developmental roles.
- Discussion of specific risk assessment challenges and hypotheses related to developmental exposure.
Main Results:
- Developing organs exhibit particular sensitivity to low concentrations of sex steroids and thyroid hormones.
- Developmental exposure to EDCs can induce irreversible changes, unlike transient exposures in adults.
- Significant knowledge gaps exist regarding quantitative risk assessment for developmental EDC exposure.
Conclusions:
- Embryos and fetuses may be more sensitive to endocrine disruptors than adults.
- Exposure during critical developmental periods, before homeostatic system maturation and during genetic imprinting, can have lasting consequences.
- Further research is needed to characterize dose-response curves and fully understand the risks of EDC exposure during development.
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