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08:33
An Ex vivo Culture System to Study Thyroid Development
Published on: June 6, 2014
Role of maternal thyroid hormones in the developing neocortex and during human evolution
Denise Stenzel1, Wieland B Huttner
1Max Planck Institute of Molecular Biology and Genetics Dresden, Germany.
Frontiers in Neuroanatomy
|July 25, 2013
Summary
Maternal thyroid hormones are crucial for fetal brain development. Insufficient levels, often due to iodine deficiency, can cause severe neurological defects and impact cognitive evolution.
Area of Science:
- Neuroendocrinology
- Developmental Biology
- Evolutionary Biology
Background:
- Thyroid hormones are essential for normal brain development, with maternal supply critical for fetal neurogenesis.
- Iodine intake is vital for thyroid hormone production and has been linked to brain expansion and cognitive evolution in humans.
- Thyroid hormones regulate gene expression via nuclear receptors, making fetal development sensitive to maternal hormone fluctuations.
Purpose of the Study:
- To review the influence of thyroid hormones on human brain evolution, considering dietary iodine intake.
- To summarize rodent experimental findings on maternal thyroid hormone function during neurogenesis.
- To evaluate the impact of maternal thyroid hormone deficiency and receptor/transporter absence on brain development and function.
Main Methods:
- Literature review focusing on human evolution and dietary iodine.
- Analysis of experimental studies in rodents investigating maternal thyroid hormone deficiency.
- Examination of the roles of thyroid hormone receptors and transporters in neurodevelopment.
Main Results:
- Maternal thyroid hormone deficiency leads to significant neurological defects, including impaired cognitive function.
- Studies in rodents reveal specific cellular behaviors influenced by thyroid hormones during neurogenesis.
- Alterations in thyroid hormone signaling impact gene expression profiles critical for fetal brain development.
Conclusions:
- Thyroid hormones play a fundamental role in fetal brain development and cognitive evolution, influenced by iodine availability.
- Experimental models highlight the cellular mechanisms by which maternal thyroid hormones shape the developing brain.
- Understanding these mechanisms is crucial for addressing neurological disorders linked to thyroid hormone dysfunction.
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