We studied on the effect of Curcuma longa extract on spatial learning-related memory ability of old rats in eight-arm radial maze task. Rats were randomly divided into two groups: one group was orally administered 100...We studied on the effect of Curcuma longa extract on spatial learning-related memory ability of old rats in eight-arm radial maze task. Rats were randomly divided into two groups: one group was orally administered 100 mg/KgBW/day C. longa extract (CLE) dissolved in deionized water and the other group was administered the vehicle alone for 10 weeks. The rats were tested with the partially baited eight-arm radial maze to evaluate two types of spatial memory-related learning ability displayed by reference memory errors (RMEs) and working memory errors (WMEs). Chronic administration of CLE significantly decreased the number of RMEs and WMEs, concurrently with the decreases in the cortico-hippocampal levels of lipid peroxides (LPO) and tumor necrosis factor alpha (TNF-α). In a parallel set of experiments, CLE-pretreated rats of the same age group were subjected to hypoxia-reperfusion injury by carotid artery occlusion to induce oxidative stress in the brains in order to examine whether such an in vivo hypoxia-induced oxidative stress could be ameliorated by the extract. Again, the levels of LPO were significantly decreased in the cortico-hippocampal tissues of the CLE-fed hypoxic rats. The histology of the brains also revealed that the CLE-pretreated rats had retained improved cellular integrity. Finally, our results provide the evidence that oral administration of C. longa extract increases the defense against oxidative stress and proinflammatory TNF-α, concurrently with the improvement of memory-related brain cognitive ability of the aged rats.展开更多
目的:观察荷梗水提物对慢性应激所致抑郁症模型小鼠学习记忆及蛋白激酶C(PKC)表达的影响。方法:将48只小鼠随机分为正常组、模型组、氟西汀组(10 mg·kg^(-1))、荷梗低、中、高剂量组(100,200和400 mg·kg^(-1))。连续21 d ig给...目的:观察荷梗水提物对慢性应激所致抑郁症模型小鼠学习记忆及蛋白激酶C(PKC)表达的影响。方法:将48只小鼠随机分为正常组、模型组、氟西汀组(10 mg·kg^(-1))、荷梗低、中、高剂量组(100,200和400 mg·kg^(-1))。连续21 d ig给药,复制慢性不可预见性温和应激(CUMS)抑郁模型,通过糖水偏爱实验、水迷宫实验和八臂迷宫实验观测小鼠的抑郁样行为,免疫组化法和免疫印迹法检测小鼠海马内PKC的表达水平。结果:与正常组比较,模型组小鼠糖水偏爱分数低,寻找平台潜伏期长,所占目标象限百分比低,工作记忆和参考记忆错误次数多,PKC蛋白表达水平低;与模型组比较,荷梗高剂量组和氟西汀组小鼠糖水偏爱分数高,寻找平台潜伏期短,所占目标象限百分比高,工作记忆和参考记忆错误次数少,PKC蛋白表达水平高。结论:荷梗水提物可能通过提高海马内PKC蛋白表达水平来抵抗或减轻CUMS所致抑郁小鼠的行为变化和学习记忆能力减退。展开更多
文摘We studied on the effect of Curcuma longa extract on spatial learning-related memory ability of old rats in eight-arm radial maze task. Rats were randomly divided into two groups: one group was orally administered 100 mg/KgBW/day C. longa extract (CLE) dissolved in deionized water and the other group was administered the vehicle alone for 10 weeks. The rats were tested with the partially baited eight-arm radial maze to evaluate two types of spatial memory-related learning ability displayed by reference memory errors (RMEs) and working memory errors (WMEs). Chronic administration of CLE significantly decreased the number of RMEs and WMEs, concurrently with the decreases in the cortico-hippocampal levels of lipid peroxides (LPO) and tumor necrosis factor alpha (TNF-α). In a parallel set of experiments, CLE-pretreated rats of the same age group were subjected to hypoxia-reperfusion injury by carotid artery occlusion to induce oxidative stress in the brains in order to examine whether such an in vivo hypoxia-induced oxidative stress could be ameliorated by the extract. Again, the levels of LPO were significantly decreased in the cortico-hippocampal tissues of the CLE-fed hypoxic rats. The histology of the brains also revealed that the CLE-pretreated rats had retained improved cellular integrity. Finally, our results provide the evidence that oral administration of C. longa extract increases the defense against oxidative stress and proinflammatory TNF-α, concurrently with the improvement of memory-related brain cognitive ability of the aged rats.
文摘目的:观察荷梗水提物对慢性应激所致抑郁症模型小鼠学习记忆及蛋白激酶C(PKC)表达的影响。方法:将48只小鼠随机分为正常组、模型组、氟西汀组(10 mg·kg^(-1))、荷梗低、中、高剂量组(100,200和400 mg·kg^(-1))。连续21 d ig给药,复制慢性不可预见性温和应激(CUMS)抑郁模型,通过糖水偏爱实验、水迷宫实验和八臂迷宫实验观测小鼠的抑郁样行为,免疫组化法和免疫印迹法检测小鼠海马内PKC的表达水平。结果:与正常组比较,模型组小鼠糖水偏爱分数低,寻找平台潜伏期长,所占目标象限百分比低,工作记忆和参考记忆错误次数多,PKC蛋白表达水平低;与模型组比较,荷梗高剂量组和氟西汀组小鼠糖水偏爱分数高,寻找平台潜伏期短,所占目标象限百分比高,工作记忆和参考记忆错误次数少,PKC蛋白表达水平高。结论:荷梗水提物可能通过提高海马内PKC蛋白表达水平来抵抗或减轻CUMS所致抑郁小鼠的行为变化和学习记忆能力减退。
