Differences in Cognitive Function of Rats with Traumatic Brain Injuries Following Hyperbaric Oxygen Therapy
Xiaonian Zhang, Xiaoyan Wang, Xinting Sun, Xiaojing Sun, Yue Zhang, Hao Zhang
(China Rehabilitation Research Center, Beijing Key Laboratory of Neural Injury and Rehabilitation, Capital Medical University, Beijing, China (mainland))
Med Sci Monit 2016; 22:2608-2615
Hyperbaric oxygen (HBO) is a historical therapeutic option in the treatment of various types of brain damage. At present, clinical treatment of hypoxic-ischemic injury is giving priority to cognitive training. The effects of HBO on cognitive dysfunction were observed in a controlled cortical impact (CCI) rat model.
MATERIAL AND METHODS: Seventy male SD rats were randomly divided into control (n=10) and intervention (n=60) groups. All rats underwent baseline water maze testing 1 day before modeling, and were retested 8 weeks after modeling. The percentage of residence time during escape latency in the target quadrant and the total time were recorded. Data were analyzed by SPSS 16.0 software. P<0.05 was considered statistically significant.
RESULTS: After 8 weeks, no statistical difference (P>0.05) existed in spatial learning ability in the 3-day and 5-day groups when compared with baseline. The other groups were statistically different by auto-comparison (P<0.05). No statistical difference (P>0.05) in spatial memory existed in the 5-day and 1-week groups when compared with baseline, while a significant difference was noted in the other groups by self-comparison (P<0.05). No statistical difference (P>0.05) was noted in the level of expression of growth-associated protein-43 (GAP-43) and synaptophysin (Syn) in the 1-day group compared with the control group. The remaining groups and the control group were statistically different (P<0.05), while the level of expression of GAP-43 and Syn in the 5-day, 1-week, and 2-week groups was significantly different compared with that in the control group (P<0.01).
CONCLUSIONS: If HBO therapy was provided 5-7 days after craniocerebral trauma, there was apparent improvement in cognitive function and neuroplasticity.
Keywords: Brain Injuries, Hyperbaric Oxygenation, Neuronal Plasticity