Objective: To explore the protective effects of zinc on learning and memory of mice suffering from acute repeated hypoxia. Method: 36 mice were divided into three groups randomly: normal control, saline+hypoxia (NS) group, zinc+hypoxia (Zinc) group. Model of acute repeated hypoxic mice was duplicated and the anoxia endurance was recorded. The step-through test and step-down test were used to evaluate the ability of learning and memory. Results: 1.Compared with saline+hypoxia group, the anoxia endurance was significantly increased in zinc+hypoxia group (P

Objective: To explore the effects of zinc (Zn) on neuronal nitric oxide synathase (nNOS) and somatostatin(SS) in cerebral cortex of rats after sleep deprivation (SD), and discuss the protective mechanism of Zn on learning and memory. Method: SD was induced in male Wistar rats by employing “flower pot” technique. The rats in SD+Zn groups were supplemented with Zn in feed (containing 200 mg Zn/kg)for 3 d before SD. The number of nNOS and SS positive neurons in cortex of rats after different time of SD and Zn supplementation were observed. Results: nNOS and SS positive neurons in cortex significantly decreased in SD1 d+Zn group than in SD1d group(P0.05). Conclusion: Zinc can improve the ability of learning and memory of rats after sleep deprivation by protecting nNOS and SS positive neurons in cerebral cortex.

Objective: To explore the protection of taurine-zinic coordination compound(TZC) against the neurotoxicity of depleted uranium (DU). Method: Rats were exposed to DU by different dosages intratracheal instillation of DU particles. One group was supplemented with TZC. Learning times in Y-labyrinth experiment, number of somatostatin positive cortical neurons were compared. Results: Learning times in Y-labyrinth experiment were increased in DU groups, and DU 5mg+TZC group was less than that of DU 5 mg group (P