Abstract: Objective To investigate the relationship between the expressive variety of apoptosis-related gene Bcl-2 ,Fas and the brain injury time during earlier period after cerebral contusion. Methods The morphologia feature of brain tissue was observed under microscopy and immunohistochemistry,image analyze technique was applied to detected the expression of Bcl-2 and Fas. Results Typical apoptotic cells were seen 8 hours after cerebral contusion. The expression of apoptosis-related gene was noted after 30 minutes and keep increase subsequently. The expression of Bcl-2 reached maximum level at 4 hours after brain trauma and then declined. Conclusion Detecting the expression of Bcl-2 and Fas would be of valuable in the distinguishment of promortem and postmortem injury,and the estimation of brain injury time during the earlier period after cerebral contusion.

Key words: cerebral contusion, Bcl-2, Fas, apoptosis