Expression of hepatocyte growth factor in the brain tissue of rats following traumatic brain injury
LEI Ping, YANG Yi-peng, ZHANG Jian-ning, YANG Xin-yu, WANG Zeng-guang, LIANG Hai-qian, WANG Jing-hua, YANG Shu-yuan
Published 2008-11-15
Cite as Chin J Neuromed, 2008, 07(11): 1138-1141. DOI: 10.3760/cma.j.issn.1671-8925.2008.11.014
Abstract
Objective To study the temporal expression pattern of hepatocyte growth factor (HGF) in the brain tissue of rats after traumatic brain injury (TBI) and provide evidence for HGF-targeted interventions for TBI. Methods Ninety-six Wistar rats were randomly divided into 8 groups including a sham-operated group and 7 TBI groups (n=12) examined at 2, 6, 12, 24, 72, 168 and 336 h after to fluid percussion injury of the brain. Each group was randomized into two subgroups (n=6), one for examining HGF expression and neuropathological changes in the brain with immunohistochemistry and HE staining, and the other for detecting the expression of HGF mRNA using RT-PCR. Results HGF expression increased at both the protein and mRNA levels after TBI. The number of HGF-positive cells began to increase on the margin of the injured area 24 h after the injury till reaching the peak level at 168 h. At 336 h after the injury, the number of HGF-positive cells declined but still maintained a high level. The expression of HGF mRNA began to increase 72 h after injury and reached the peak level at 168 h. Conclusion As a neurotrophic factor and an angiogenic factor, HGF may contribute to neuronal protection and nerve tissue repair and regeneration after TBI.
Key words:
Hepatocyte growth factor; Traumatic brain injury
Contributor Information
LEI Ping
Department of Neurosurgery, General Hospital, Tianjin Medical University, Tianjin 300052, China
YANG Yi-peng
Department of Neurosurgery, General Hospital, Tianjin Medical University, Tianjin 300052, China
ZHANG Jian-ning
Department of Neurosurgery, General Hospital, Tianjin Medical University, Tianjin 300052, China
YANG Xin-yu
Department of Neurosurgery, General Hospital, Tianjin Medical University, Tianjin 300052, China
WANG Zeng-guang
Department of Neurosurgery, General Hospital, Tianjin Medical University, Tianjin 300052, China
LIANG Hai-qian
Department of Neurosurgery, General Hospital, Tianjin Medical University, Tianjin 300052, China
WANG Jing-hua
Department of Neurosurgery, General Hospital, Tianjin Medical University, Tianjin 300052, China
YANG Shu-yuan
Department of Neurosurgery, General Hospital, Tianjin Medical University, Tianjin 300052, China