THE EXPERIMENTAL STUDY ON THE CELL APOPTOSIS AND EXPRES- SION OF BCL-2 PROTEIN IN INTRACEREBRAL HEMORRHAGE IN MODEL OF RATS

摘要

Objective To study whether there is the apoptosis of neural cells and the expression of Bcl-2 protein in intracerebral hemorrhage (ICH) in model of rats, for the further understanding the mechanism of the delayed damage of the neural cells around the hematoma after ICH. Methods Fifty SD rats were randomly divided into 5 groups, ten in each. With the Group A as the control, the rest 40 were used to set up intracerebral hemorrhage model. The brains were taken out at 12th, 24th, 48th and 72th hours, respectively. Apoptosis cells were detected with terminal deoxynucleotidyl transferase mediated dUTP nick end labeling (TUNED, and the expression of Bcl-2 protein was detected with immunochemical stainging niethed (SP). Results In the control group, no apoptosis cells and Bcl-2 protein were detected. In rest groups, the apoptosis cells and Bcl-2 protein were expressed in different degree. Apoptosis rates verified and corresponded with the time after ICH, with the peak at 48th - 72th hour after hemorrhage. The peak rate of apoptosis cells was (24. 50 ± 2. 69) % and Bcl-2 protein expression was (20.76 ± 1.97) % . There was significant difference between the experimental groups and control (P < 0.05) - and no linear relationship between the apoptosis rate and the expression of Bcl-2 protein. Conclusion Apoptosis may be an important factor in the secondary trauma of ICH. There is a time leg after hemorrhage. All this is instructive to clinical treatment in time. Bcl-2 protein keeps increasing in a certain time after hemorrhage, but not synchronize with the cell apoptosis. This indicates that bcl-2 has the effect to reduce the apoptosis of neural cells.