浙江临床医学
浙江臨床醫學
절강림상의학
ZHEJIANG CLINICAL MEDICAL JOURNAL
2014年
7期
1033-1035
,共3页
姚淞元%姚伟%黄琪%王金勇%何今成
姚淞元%姚偉%黃琪%王金勇%何今成
요송원%요위%황기%왕금용%하금성
阿尔茨海默病%轻度认知功能障碍%绞股蓝皂甙%超氧化物歧化酶%丙二醛
阿爾茨海默病%輕度認知功能障礙%絞股藍皂甙%超氧化物歧化酶%丙二醛
아이자해묵병%경도인지공능장애%교고람조대%초양화물기화매%병이철
Alzheimer's disease%Mild cognitive impairment (MCI)%Gypenoside%Superoxide dismutase%Glutathione peroxidase%Malondialdehyde
目的:探讨绞股蓝皂甙(GP)改善轻度认知功能障碍(MCI)大鼠学习记忆能力的作用及其机制。方法将12~15个月龄SD健康大鼠随机分为5组:假手术对照组(SSC组)、MCI模型对照组(MCI组)和GP低、中、高剂量组(LGP组、MGP组、HGP组),每组20只。通过结扎双侧颈内动脉(ICA)致其重度狭窄并大脑持续低灌注2个月,建立MCI大鼠模型。采用GP连续灌胃2个月作用于MCI大鼠,观察各组大鼠行为学、大脑皮层和海马超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)活性和丙二醛(MDA)、一氧化氮合酶(NOS)、一氧化氮(NO)含量的变化。结果(1)与MCI组比较,LGP组、MGP组、HGP组的潜伏期依次变短(P<0.01),其中HGP组的潜伏期接近SSC组(P>0.05)。(2)与MCI组比较,LGP组、MGP组、HGP组穿过原平台位置的次数依次增多(P<0.01)、在原平台象限游泳的时间百分比依次增高(P<0.01);其中HGP组的次数和时间百分比接近SSC组(P>0.05)。(3)与MCI组比较,LGP组、MGP组、HGP组的SOD、GSH-Px活性依次升高(P<0.01),MDA、NOS、NO含量依次降低(P<0.01);其中HGP组的SOD、GSH-Px活性以及MDA、NOS、NO含量接近SSC组(P>0.05)。结论绞股蓝皂甙可能通过提高脑组织SOD、GSH-Px活性、抑制NOS活性以及降低MDA、NO含量,改善MCI大鼠学习记忆能力。
目的:探討絞股藍皂甙(GP)改善輕度認知功能障礙(MCI)大鼠學習記憶能力的作用及其機製。方法將12~15箇月齡SD健康大鼠隨機分為5組:假手術對照組(SSC組)、MCI模型對照組(MCI組)和GP低、中、高劑量組(LGP組、MGP組、HGP組),每組20隻。通過結扎雙側頸內動脈(ICA)緻其重度狹窄併大腦持續低灌註2箇月,建立MCI大鼠模型。採用GP連續灌胃2箇月作用于MCI大鼠,觀察各組大鼠行為學、大腦皮層和海馬超氧化物歧化酶(SOD)、穀胱甘肽過氧化物酶(GSH-Px)活性和丙二醛(MDA)、一氧化氮閤酶(NOS)、一氧化氮(NO)含量的變化。結果(1)與MCI組比較,LGP組、MGP組、HGP組的潛伏期依次變短(P<0.01),其中HGP組的潛伏期接近SSC組(P>0.05)。(2)與MCI組比較,LGP組、MGP組、HGP組穿過原平檯位置的次數依次增多(P<0.01)、在原平檯象限遊泳的時間百分比依次增高(P<0.01);其中HGP組的次數和時間百分比接近SSC組(P>0.05)。(3)與MCI組比較,LGP組、MGP組、HGP組的SOD、GSH-Px活性依次升高(P<0.01),MDA、NOS、NO含量依次降低(P<0.01);其中HGP組的SOD、GSH-Px活性以及MDA、NOS、NO含量接近SSC組(P>0.05)。結論絞股藍皂甙可能通過提高腦組織SOD、GSH-Px活性、抑製NOS活性以及降低MDA、NO含量,改善MCI大鼠學習記憶能力。
목적:탐토교고람조대(GP)개선경도인지공능장애(MCI)대서학습기억능력적작용급기궤제。방법장12~15개월령SD건강대서수궤분위5조:가수술대조조(SSC조)、MCI모형대조조(MCI조)화GP저、중、고제량조(LGP조、MGP조、HGP조),매조20지。통과결찰쌍측경내동맥(ICA)치기중도협착병대뇌지속저관주2개월,건립MCI대서모형。채용GP련속관위2개월작용우MCI대서,관찰각조대서행위학、대뇌피층화해마초양화물기화매(SOD)、곡광감태과양화물매(GSH-Px)활성화병이철(MDA)、일양화담합매(NOS)、일양화담(NO)함량적변화。결과(1)여MCI조비교,LGP조、MGP조、HGP조적잠복기의차변단(P<0.01),기중HGP조적잠복기접근SSC조(P>0.05)。(2)여MCI조비교,LGP조、MGP조、HGP조천과원평태위치적차수의차증다(P<0.01)、재원평태상한유영적시간백분비의차증고(P<0.01);기중HGP조적차수화시간백분비접근SSC조(P>0.05)。(3)여MCI조비교,LGP조、MGP조、HGP조적SOD、GSH-Px활성의차승고(P<0.01),MDA、NOS、NO함량의차강저(P<0.01);기중HGP조적SOD、GSH-Px활성이급MDA、NOS、NO함량접근SSC조(P>0.05)。결론교고람조대가능통과제고뇌조직SOD、GSH-Px활성、억제NOS활성이급강저MDA、NO함량,개선MCI대서학습기억능력。
Objective To investigate the effect and mechanism of gypenoside (GP) in improving the learning and memory ability of rats with mild cognitive impairment (MCI). Methods SD rats aged 12-15 months were randomly divided into 5 groups:sham surgery control (SSC), mild cognitive impairment model control (MCI), and low-, medium-and high-GP groups (LGP, MGP, HGP), each with 20 rats. The rat model of MCI was constructed by ligating bilateral internal carotid arteries (ICA) to induce severe stenosis, followed by persistent cerebral hypoperfusion for 2 months. Gastric lavage was performed for 2 months using GP in MCI group. The behaviors of rats, the changes of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activity and the concentrations of malondialdehyde (MDA), nitric oxide synthase (NoS) and nitric oxide (No) in the cerebral cortex and hippocampus were observed. Results (1) Compared with MCI group, the latency stage in the groups LGP, MGP and HGP was shortened (P<0.01). The latency stage of HGP was close to that of SSC (P>0.05);(2) compared with MCI group, the number of crossings of the original platform was increased from LGP, MGP to HGP (P<0.01). In these three groups, the percentage of time spent in swimming in the original platform was increased successively (P<0.01). The number of crossings and the percentage of time spent in HGP were close to those of SSC (P>0.05); (3) compared with MCI, the activities of SOD and GSH-Px were increased successively from LGP, to MGP and to HGP (P<0.01);the concentrations of MDA, NOS and NO decreased in sequence (P<0.01). The activities of SOD and GSH-Px in HGP, as well as the concentrations of MDA, NOS and NO, were close to those of SSC (P>0.05). Conclusion Gypenoside improves the learning and memory ability of MCI rats by promoting the activities of SOD and GSH-Px, inhibiting the activity of NOS and reducing the contents of MDA and NO contents.