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23 July 2016 : Animal Research

Differences in Cognitive Function of Rats with Traumatic Brain Injuries Following Hyperbaric Oxygen Therapy

Xiaonian ZhangD, Xiaoyan WangE, Xinting SunA, Xiaojing SunC, Yue ZhangD, Hao ZhangB

DOI: 10.12659/MSM.899548

Med Sci Monit 2016; 22:2608-2615

Abstract

BACKGROUND: 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

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