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  • Title: Thyroid hormone action in fetal brain development and potential for disruption by environmental chemicals.
    Author: Zoeller RT, Crofton KM.
    Journal: Neurotoxicology; 2000 Dec; 21(6):935-45. PubMed ID: 11233763.
    Abstract:
    Thyroid hormone is well-known to play essential roles in brain development. Therefore, environmental factors that interfere with thyroid function or thyroid hormone action may produce deleterious effects on brain development by interfering with thyroid hormone action in the developing brain. The purpose of this review is to identify in broad terms the gaps in our knowledge of thyroid hormone action in brain development, to relate these gaps to present information on thyroid disruption, and to review briefly our recent research that is germane to these issues. The endocrinology of the thyroid system is first reviewed briefly with an emphasis on the neuroendocrine and extrathyroidal mechanisms controlling circulating levels of thyroid hormones. The second section reviews the evidence that thyroid hormone is important for fetal, as well as neonatal, brain development. We review the mechanism of thyroid hormone action in the third section and briefly relate this information to information about the mechanism of thyroid hormone action on brain development. In the final section, we review the endocrinology of thyroid disruption with an emphasis on disruption of thyroid hormone action.
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