Protective effects of "Ziziphus jujuba" fruit extract on morphine - induced hippocampal oxidative stress and spatial memory impairment in rats

The hippocampus is one of the main areas involved in the learning and acquisition of spatial memory. Opioid drugs such as morphine cause spatial memory impairment. Jujube fruit extract with antioxidant properties reduces oxidative stress. The aim of the present study was to investigate the effect of jujube fruit extract on morphine-induced spatial memory impairment and enzyme assay in hippocampus of rats. In this experimental study, Forty two male rats were classified randomly into six groups of seven. The control group (saline and gavage), Morphine group: (0.5 mg / kg morphine ip), Group 3 and 4; (100 and 200 mg/kg extract + saline), Groups 5 and 6 (100 and 200 mg/kg extract + 0.5 mg/kg morphine) received extract as gavage and morphine intraperitoneally for 30 days. Space memory was evaluated by elevated plus maze test. After separation and hippocampus tissue homogenates, acetylcholinesterase, catalase and superoxide dismutase activity were measured. The time latency in morphine-treated group was higher than control. The extract group of 200 plus morphine showed a significant decrease in time latency on days 15 and 16 (P