期刊
NEUROSCIENCE LETTERS
卷 280, 期 2, 页码 79-82出版社
ELSEVIER SCI IRELAND LTD
DOI: 10.1016/S0304-3940(00)00768-0
关键词
mitosis; thyroid hormones; mouse; central nervous system; neonatal period; progenitors
Circulating T-4 and T-3 were measured during the first three post-natal weeks in the mouse and found to increase in a triphasic manner. The first increase occurred at post-natal day 6 and was simultaneous with a decrease in bromodeoxyuridine incorporation in areas showing post-natal mitosis. We investigated whether there was a causal relationship between increased thyroid hormone levels and decreased proliferation by inducing hypothyroidism in darns and progeny. Hypothyroidism prolonged mitotic activity in the olfactory bulb, hippocampus, subventricular zone and the cerebellar cortex. This suggests that the increase in T-3 at the end of the first postnatal week is implicated in terminating progenitor proliferation in many parts of the mouse brain. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.
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