The effect of HBO on RhoA expression and nerve function in rat focal cerebral ischemic model / 中华物理医学与康复杂志

ABSTRACT

Objective To evaluated the effect of hyperbaric oxygenation therapy(HBO)on the RhoA ex- pression and nerve function after transient focal cerebral ischemia in a rat model of middle cerebral artery occlusion. Methods One hundred and twenty-six healthy Sprague-Dawley rats were used and randomly divided into a sham op- eration group(shame group,n=42),a treatment group(n=42),and a control group(n=42).The animal model of middle cerebral artery occlusion(MCAO)was established by using the Zea-Longa method with the animals in the treatment and the control groups,and sham operation was performed with those in the sham group.HBO was applied to the animals in the treatment group.The RhoA protein expression was observed by using immunohistochemistry technique,and the neurological function was evaluated by Bederson's scale at different time points after MCAO.Re- sults(1)Weakly positive expression of RhoA could be located in bilateral cortex and the basal ganglia in the sham group.The expression of RhoA in the treatment group and control group was increased as early as 6 hours after MCAO when compared with that of the sham group,and peaked at 48 h after MCAO and decreased after then,but was still higher than that of the shame group at 7th day to 14th day after MCAO.It was also found that the expression of RhoA of the treatment group was significantly lower than that of the control group(P