2003年12月
Thyroid hormone enhances the formation of synapses between cultured neurons of rat cerebral cortex
CELLULAR AND MOLECULAR NEUROBIOLOGY
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- 巻
- 23
- 号
- 6
- 開始ページ
- 895
- 終了ページ
- 906
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1023/B:CEMN.0000005318.53810.de
- 出版者・発行元
- KLUWER ACADEMIC/PLENUM PUBL
1. Thyroid hormones play important roles in the development of the brain. Increasing evidence suggests that the deprivation of thyroid hormones in the early developmental stage causes structural and functional deficits in the CNS, but the precise mechanism underlying this remains elusive. In this study, we investigated the effects of thyroid hormones on synapse formation between cultured rat cortical neurons, using a system to estimate functional synapse formation in vitro.
2. Exposure to 10(-9) M thyroid hormones, 3,5,3'-triiodothyronine or thyroxine, caused an increase in the frequency of spontaneous synchronous oscillatory changes in intracellular calcium concentration, which correlated with the number of synapses formed.
3. The detection of synaptic vesicle-associated protein synapsin I by immunocytochemical and immunoblot analysis also confirmed that exposure to thyroxine facilitated synapse formation.
4. The presence of amiodarone, an inhibitor of 5'-deiodinase, or amitrole, a herbicide, inhibited the synapse formation in the presence of thyroxine.
5. In conclusion, we established a useful in vitro assay system for screening of miscellaneous chemicals that might interfere with synapse formation in the developing CNS by disrupting the thyroid system.
2. Exposure to 10(-9) M thyroid hormones, 3,5,3'-triiodothyronine or thyroxine, caused an increase in the frequency of spontaneous synchronous oscillatory changes in intracellular calcium concentration, which correlated with the number of synapses formed.
3. The detection of synaptic vesicle-associated protein synapsin I by immunocytochemical and immunoblot analysis also confirmed that exposure to thyroxine facilitated synapse formation.
4. The presence of amiodarone, an inhibitor of 5'-deiodinase, or amitrole, a herbicide, inhibited the synapse formation in the presence of thyroxine.
5. In conclusion, we established a useful in vitro assay system for screening of miscellaneous chemicals that might interfere with synapse formation in the developing CNS by disrupting the thyroid system.
- リンク情報
- ID情報
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- DOI : 10.1023/B:CEMN.0000005318.53810.de
- ISSN : 0272-4340
- PubMed ID : 14964777
- Web of Science ID : WOS:000186783800003