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An Ex vivo Culture System to Study Thyroid Development
Published on: June 6, 2014
Thyroid hormone regulates the expression of SNAP-25 during rat brain development
Hong-Mei Zhang1, Qing Su, Min Luo
1Department of Endocrinology, Xin Hua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, PR China.
Molecular and Cellular Biochemistry
|October 3, 2007
Summary
Thyroid hormones regulate brain development by controlling gene expression. This study found that thyroid hormone deficiency decreases synaptosomal-associated protein of 25 kDa (SNAP-25) in developing rat brains, potentially explaining developmental issues.
Area of Science:
- Neuroscience
- Endocrinology
- Molecular Biology
Background:
- Thyroid hormones are crucial for postnatal brain development.
- They exert their effects by regulating specific gene expression in the brain via nuclear receptors.
Purpose of the Study:
- To identify novel thyroid hormone-responsive genes in the developing rat brain.
- To investigate the role of synaptosomal-associated protein of 25 kDa (SNAP-25) in thyroid hormone-mediated brain development.
Main Methods:
- Microarray analysis was used to identify differentially expressed genes in hypothyroid rat brains.
- Real-time RT-PCR and western blotting were employed to validate gene and protein expression levels.
Main Results:
- Microarray analysis revealed that SNAP-25 was significantly down-regulated in hypothyroid rat brains.
- Validation studies confirmed decreased SNAP-25 mRNA and protein levels in developing hypothyroid rat brains.
- SNAP-25 is identified as a novel thyroid hormone-responsive gene.
Conclusions:
- Thyroid hormone deficiency leads to decreased expression of SNAP-25 in the developing rat brain.
- Reduced SNAP-25 expression may contribute to the impaired brain development observed in hypothyroidism.
- SNAP-25 is a key regulator in thyroid hormone-dependent brain development.
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