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Effects of postnatal ethanol exposure on neurotrophic factors and signal transduction pathways in rat brain

✍ Scribed by Vittorio Fattori; Shin-ichi Abe; Kumiko Kobayashi; Lucio G. Costa; Ryozo Tsuji


Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
257 KB
Volume
28
Category
Article
ISSN
0260-437X

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✦ Synopsis


Abstract

Exposure to ethanol during development induces severe brain damage, resulting in a number of CNS dysfunctions including microencephaly and mental retardation. Potential targets of ethanol‐induced neurotoxicity include neurotrophic factors and their signal transduction pathways. In the present study, rat pups were given ethanol at the dose of 5 g kg^−1^ via gavage from postnatal day (PND) 5 to 8, and mRNA expression of nerve growth‐factor (NGF), brain‐derived neurotrophic factor (BDNF), and neurotrophic factor‐3 (NT‐3) in the cerebral cortex was examined, with attention to signal transduction, on PND 8. The mRNA level of BDNF was decreased by ethanol while those of NGF or NT‐3 were not changed. Brain weights were decreased and the levels of phospho‐MAPK, phospho‐p70S6K and phospho Akt were decreased while phosphor‐PKC__ζ__ and phospho‐CREB remained unchanged. These results suggest that BDNF and its related signal pathways involving Akt, MAPK and p70S6K are potential targets of ethanol‐induced developmental neurotoxicity. Copyright © 2007 John Wiley & Sons, Ltd.


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