BACKGROUND： Infusion of kainic acid into the basal nuclei induces neuronal excitotoxicity, degeneration and necrosis, resulting in disturbed learning and memory functions. OBJECTIVE： To explore the effects of differ...BACKGROUND： Infusion of kainic acid into the basal nuclei induces neuronal excitotoxicity, degeneration and necrosis, resulting in disturbed learning and memory functions. OBJECTIVE： To explore the effects of different doses of traditional Chinese medicine Daicong solution on brain ultrastructure in a rat model of Alzheimer＇s disease. DESIGN, TIME AND SETTING： The randomized, controlled, cellular morphology experiment was performed at the Shandong Provincial Key Laboratory of Molecular Immunology of Weifang Medical University, China from October 2006 to March 2007. MATERIALS： Fifty healthy, Sprague Dawley rats, aged 22-months, were used to establish rat models of Alzheimer＇s disease. The Morris water maze was prepared at the Pharmacometrics Key Laboratory of Weifang Medical University in Shandong Province of China. Traditional Chinese medicine Daicong solution （crude drug 1 g/mL）, composed of radix ginseng, rehmannia dried rhizome, anemarrhenae and radix astragali, was produced by the Department of Pharmacy of Hospital Affiliated to Weifang Medical University. Kainic acid was provided by Professor Xiuyan Li from Weifang Medical University. METHODS： A total of 40 model rats were equally and randomly divided into four groups： dementia model, low-dose Daicong solution （5 g/kg/d）, moderate-dose Daicong solution （10 g/kg/d）, and high-dose Daicong solution （20 g/kg/d）. An additional 10 healthy rats served as the normal control group. Rats in the dementia model and normal control groups received saline （10 mL/kg/d）. MAIN OUTCOME MEASURES： Neural cell ultrastructure was observed utilizing electron microscopy after 1 month of respective treatments. RESULTS： Compared with the normal control group, electron density and the number of ribosomes were significantly reduced in neuronal cytoplasm, and many lipofuscin grains and vacuole-like changes were observed in mitochondria in the dementia model group. In addition, nuclear chromatin presented with different sizes of plaque-shaped degenerative pathological changes. In the Alzheimer＇s disease rat model, neurons and neuroepithelial cells recovered to normal conditions following treatment with moderate- and high-dose Daicong solution. In the low-dose Daicong group, the condition was slightly improved, but the cytopathic effects were still significant. CONCLUSION： Daicong solution significantly improved neuronal and neuroepithelial pathological ultrastructure in a rat model of Alzheimer＇s disease.展开更多
Objective To explore the effect of Daicong solu tion(DCS)on aged rats dementia model.Method The experiment used22-month old rats whose basal nuclei was destroyed by bilateral electrolytic method as model for aged rats...Objective To explore the effect of Daicong solu tion(DCS)on aged rats dementia model.Method The experiment used22-month old rats whose basal nuclei was destroyed by bilateral electrolytic method as model for aged rats dem entia.They were treated with DCS for a month.Then the level of superox ide dismutase(SOD),lipid peroxide(LPO),monoamine oxidase(MAO)and cholinesterase(CHE)in the serum was measured.Result Compared with the control,the activ ity of SOD increased markedly(P <0.01),the content of LOP and activity MAO and CHE were decreased(P <0.01).Conclusion DCS is effective in treating the aged dementia.展开更多
基金Supported by: the Program ofAdministration Bureau for Traditional Chinese Medicine of Shandong Province, No.2001-2-75
文摘BACKGROUND： Infusion of kainic acid into the basal nuclei induces neuronal excitotoxicity, degeneration and necrosis, resulting in disturbed learning and memory functions. OBJECTIVE： To explore the effects of different doses of traditional Chinese medicine Daicong solution on brain ultrastructure in a rat model of Alzheimer＇s disease. DESIGN, TIME AND SETTING： The randomized, controlled, cellular morphology experiment was performed at the Shandong Provincial Key Laboratory of Molecular Immunology of Weifang Medical University, China from October 2006 to March 2007. MATERIALS： Fifty healthy, Sprague Dawley rats, aged 22-months, were used to establish rat models of Alzheimer＇s disease. The Morris water maze was prepared at the Pharmacometrics Key Laboratory of Weifang Medical University in Shandong Province of China. Traditional Chinese medicine Daicong solution （crude drug 1 g/mL）, composed of radix ginseng, rehmannia dried rhizome, anemarrhenae and radix astragali, was produced by the Department of Pharmacy of Hospital Affiliated to Weifang Medical University. Kainic acid was provided by Professor Xiuyan Li from Weifang Medical University. METHODS： A total of 40 model rats were equally and randomly divided into four groups： dementia model, low-dose Daicong solution （5 g/kg/d）, moderate-dose Daicong solution （10 g/kg/d）, and high-dose Daicong solution （20 g/kg/d）. An additional 10 healthy rats served as the normal control group. Rats in the dementia model and normal control groups received saline （10 mL/kg/d）. MAIN OUTCOME MEASURES： Neural cell ultrastructure was observed utilizing electron microscopy after 1 month of respective treatments. RESULTS： Compared with the normal control group, electron density and the number of ribosomes were significantly reduced in neuronal cytoplasm, and many lipofuscin grains and vacuole-like changes were observed in mitochondria in the dementia model group. In addition, nuclear chromatin presented with different sizes of plaque-shaped degenerative pathological changes. In the Alzheimer＇s disease rat model, neurons and neuroepithelial cells recovered to normal conditions following treatment with moderate- and high-dose Daicong solution. In the low-dose Daicong group, the condition was slightly improved, but the cytopathic effects were still significant. CONCLUSION： Daicong solution significantly improved neuronal and neuroepithelial pathological ultrastructure in a rat model of Alzheimer＇s disease.
文摘Objective To explore the effect of Daicong solu tion(DCS)on aged rats dementia model.Method The experiment used22-month old rats whose basal nuclei was destroyed by bilateral electrolytic method as model for aged rats dem entia.They were treated with DCS for a month.Then the level of superox ide dismutase(SOD),lipid peroxide(LPO),monoamine oxidase(MAO)and cholinesterase(CHE)in the serum was measured.Result Compared with the control,the activ ity of SOD increased markedly(P <0.01),the content of LOP and activity MAO and CHE were decreased(P <0.01).Conclusion DCS is effective in treating the aged dementia.
