Dexamethasone enhances NT-3 expression in rat hippocampus after traumatic brain injury.

Abstract:

:The cellular events in traumatic brain injury (TBI) are complicated, and the factors mediating neurotrophins to protect and repair the injured brain cells are only beginning to be identified. This study examined the effect of dexamethasone (DEX) on neurotrophin-3 (NT-3) expression following TBI. Levels of NT-3 mRNA and protein in rat hippocampus were measured using in situ hybridization and immunohistochemistry, respectively. After TBI, the NT-3 mRNA expression was down-regulated during the first 24 h. DEX reversed the post-traumatic reduction of NT-3 mRNA expression at 2, 4, 6, and 12 h in the hippocampus, and also decreased the cell death in hippocampal hilum and supraventricular cerebral cortex after 7 days. The NT-3 protein levels generally corresponded to the mRNA levels in the hippocampal region. DEX enhanced the NT-3 expression after TBI, indicating that post-traumatic neuroprotection in the hippocampus is at least partially mediated by NT-3 and thus can be modulated by DEX treatment.

journal_name

Exp Neurol

journal_title

Experimental neurology

authors

Yang JT,Lee TH,Weng HH,Chang CN,Chen WC,Cheng WC,Wu JH

doi

10.1016/j.expneurol.2004.12.023

keywords:

subject

Has Abstract

pub_date

2005-04-01 00:00:00

pages

437-43

issue

2

eissn

0014-4886

issn

1090-2430

pii

S0014-4886(05)00002-6

journal_volume

192

pub_type

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