Large-scale epidemiological studies have found that hyperhomocysteinemia is a powerful, independent risk factor for Alzheimer's disease. Trillium tschonoskii maxim is a traditional Chinese medicine that is used to pr...Large-scale epidemiological studies have found that hyperhomocysteinemia is a powerful, independent risk factor for Alzheimer's disease. Trillium tschonoskii maxim is a traditional Chinese medicine that is used to promote memory. However, scientific understanding of its mechanism of action is limited. This report studied the potential neuroprotective effects of Trillium tschonoskii maxim extract against homocysteine-induced cognitive deficits. Rats were intravenously injected with homocysteine(400 μg/kg) for 14 days to induce a model of Alzheimer's disease. These rats were then intragastrically treated with Trillium tschonoskii maxim extract(0.125 or 0.25 g/kg) for 7 consecutive days. Open field test and Morris water maze test were conducted to measure spontaneous activity and learning and memory abilities. Western blot assay was used to detect the levels of Tau protein and other factors involved in Tau phosphorylation in the hippocampus. Immunohistochemical staining was used to examine Tau protein in the hippocampus. Golgi staining was applied to measure hippocampal dendritic spines. Our results demonstrated that homocysteine produced learning and memory deficits and increased levels of Tau phosphorylation, and diminished the activity of catalytic protein phosphatase 2A. The total number of hippocampal dendritic spines was also decreased. Trillium tschonoskii maxim extract treatment reversed the homocysteine-induced changes. The above results suggest that Trillium tschonoskii maxim extract can lessen homocysteine-induced abnormal Tau phosphorylation and improve cognitive deterioration such as that present in Alzheimer's disease.展开更多
[Objectives] To analyze main components of polyphenols of Trillium tschonoskii Maxim. and study changes under different Se concentrations. [Methods] In this experiment,the Trillium tschonoskii Maxim. was used and spec...[Objectives] To analyze main components of polyphenols of Trillium tschonoskii Maxim. and study changes under different Se concentrations. [Methods] In this experiment,the Trillium tschonoskii Maxim. was used and spectrophotometry was applied to measure the total phenols in stems,leaves and rhizomes of Trillium tschonoskii Maxim. [Results]Total phenols in stems and leaves and rhizomes of Trillium tschonoskii Maxim. were 3. 026% and 0. 513% respectively,the content of total phenols in stems and leaves was 5. 9 times of that in rhizomes; total phenol extracting solution was analyzed through UV-Vis scanning,HPLC detection,and LC-MS; 3 main polyphenol compounds were obtained: chlorogenic acid,caffeic acid and rutin,in which chlorogenic acid and caffeic acid were firstly discovered in Trillium tschonoskii Maxim. and rutin was firstly discovered in stems and leaves of Trillium tschonoskii Maxim. HPLC method was used to measure the content of chlorogenic acid,caffeic acid,and rutin in stems and leaves of Trillium tschonoskii Maxim. under different Se concentrations. [Conclusions]The content of chlorogenic acid in stems and leaves of Trillium tschonoskii Maxim. increases with the increase of Se concentration,showing Se promotes Se accumulation and the maximum content of chlorogenic acid is 2. 58%; the content of caffeic acid in stems and leaves of Trillium tschonoskii Maxim. increases slightly with the Se concentration,showing the promotion of Se to accumulation of caffeic acid is not significant;the content of rutin in stems and leaves of Trillium tschonoskii Maxim. firstly increases then declines with the increase in Se concentration,at25 mg/kg Se concentration,rutin reached the maximum value,showing the promotion of Se to rutin accumulation is not significant.展开更多
目的通过头顶一颗珠HPLC指纹图谱化学模式识别,评价秦巴及不同产地间药材的质量差异。方法采用Hibar C 18色谱柱(250 mm×4.6 mm,5μm),乙腈-水为流动相进行梯度洗脱,建立头顶一颗珠HPLC指纹图谱,经相似度评价,聚类分析(CA)、主成...目的通过头顶一颗珠HPLC指纹图谱化学模式识别,评价秦巴及不同产地间药材的质量差异。方法采用Hibar C 18色谱柱(250 mm×4.6 mm,5μm),乙腈-水为流动相进行梯度洗脱,建立头顶一颗珠HPLC指纹图谱,经相似度评价,聚类分析(CA)、主成分分析(PCA)及正交偏最小二乘判别分析(OPLS-DA)研究秦巴及外产地10批样品的质量差异。结果头顶一颗珠指纹图谱匹配得到23个共有色谱峰,其中21~23号峰依次指认为重楼皂苷Ⅶ、偏诺皂苷元-3-O-α-L-吡喃鼠李糖基-(1→4)-〔O-α-L-吡喃鼠李糖基-(1→2)〕-O-β-D-葡萄糖苷及重楼皂苷Ⅵ,各批次相似度在0.706~0.958之间。经化学模式识别10批药材样品可聚为3类,其中秦巴产的湖北神农架及陕西药材PCA综合得分较高,质量较好。OPLS-DA筛选出11个影响各批药材质量差异的色谱峰。结论建立的中药指纹图谱化学模式识别方法能明确秦巴产头顶一颗珠的道地品质,为其开发利用提供了质量评价依据。展开更多
目的观察头顶一颗珠(TTM)对阿尔茨海默病(AD)模型大鼠海马、皮质抗氧化酶和过氧化脂质表达的影响。方法用岗田酸(OA)大鼠侧脑室注射制备大鼠阿尔茨海默病大鼠模型,TTM注射液(750、500、250 mg/kg)腹腔注射,并用维生素C(V it C)腹腔注射...目的观察头顶一颗珠(TTM)对阿尔茨海默病(AD)模型大鼠海马、皮质抗氧化酶和过氧化脂质表达的影响。方法用岗田酸(OA)大鼠侧脑室注射制备大鼠阿尔茨海默病大鼠模型,TTM注射液(750、500、250 mg/kg)腹腔注射,并用维生素C(V it C)腹腔注射作阳性对照。测定正常组、模型组、阳性对照组、药物实验组海马、皮质超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)和丙二醛(MDA)的含量。结果模型组与正常组比较,SOD、GSH-Px降低(P<0.05,P<0.001),MDA增高(P<0.001)。药物实验组与阳性对照组比较,SOD、GSH-Px和MDA在TTM高、中剂量组差异明显(P<0.05),低剂量组差异不明显(P>0.05)。结论TTM抗衰老作用与增强脑组织SOD、GSH-Px活性、减少MDA蓄积有关。展开更多
基金supported in part by grants from the National Natural Science Foundation of China,No.81260172,81660223the Opening Foundation of Hubei Key Laboratory of Biological Resource Protection and Utilization of China,No.PKLHB1318+2 种基金the Science and Technology Innovation Team Project of Hubei University for Nationalities of China,No.MY2011T005the Doctoral Fund of Hubei University for Nationalities of China,No.MY2012B015the Natural Science Foundation of Hubei Province of China,No.2017CFB451
文摘Large-scale epidemiological studies have found that hyperhomocysteinemia is a powerful, independent risk factor for Alzheimer's disease. Trillium tschonoskii maxim is a traditional Chinese medicine that is used to promote memory. However, scientific understanding of its mechanism of action is limited. This report studied the potential neuroprotective effects of Trillium tschonoskii maxim extract against homocysteine-induced cognitive deficits. Rats were intravenously injected with homocysteine(400 μg/kg) for 14 days to induce a model of Alzheimer's disease. These rats were then intragastrically treated with Trillium tschonoskii maxim extract(0.125 or 0.25 g/kg) for 7 consecutive days. Open field test and Morris water maze test were conducted to measure spontaneous activity and learning and memory abilities. Western blot assay was used to detect the levels of Tau protein and other factors involved in Tau phosphorylation in the hippocampus. Immunohistochemical staining was used to examine Tau protein in the hippocampus. Golgi staining was applied to measure hippocampal dendritic spines. Our results demonstrated that homocysteine produced learning and memory deficits and increased levels of Tau phosphorylation, and diminished the activity of catalytic protein phosphatase 2A. The total number of hippocampal dendritic spines was also decreased. Trillium tschonoskii maxim extract treatment reversed the homocysteine-induced changes. The above results suggest that Trillium tschonoskii maxim extract can lessen homocysteine-induced abnormal Tau phosphorylation and improve cognitive deterioration such as that present in Alzheimer's disease.
基金Supported by the Innovation Group Project of Hubei Province Natural Science Foundation(2009CDA115)Key Laboratory of Biological Resources Protection and Utilization of Hubei Province(PKLHB1525&1526)Technology Research and Development Program of Enshi Prefecture(2013&2014)
文摘[Objectives] To analyze main components of polyphenols of Trillium tschonoskii Maxim. and study changes under different Se concentrations. [Methods] In this experiment,the Trillium tschonoskii Maxim. was used and spectrophotometry was applied to measure the total phenols in stems,leaves and rhizomes of Trillium tschonoskii Maxim. [Results]Total phenols in stems and leaves and rhizomes of Trillium tschonoskii Maxim. were 3. 026% and 0. 513% respectively,the content of total phenols in stems and leaves was 5. 9 times of that in rhizomes; total phenol extracting solution was analyzed through UV-Vis scanning,HPLC detection,and LC-MS; 3 main polyphenol compounds were obtained: chlorogenic acid,caffeic acid and rutin,in which chlorogenic acid and caffeic acid were firstly discovered in Trillium tschonoskii Maxim. and rutin was firstly discovered in stems and leaves of Trillium tschonoskii Maxim. HPLC method was used to measure the content of chlorogenic acid,caffeic acid,and rutin in stems and leaves of Trillium tschonoskii Maxim. under different Se concentrations. [Conclusions]The content of chlorogenic acid in stems and leaves of Trillium tschonoskii Maxim. increases with the increase of Se concentration,showing Se promotes Se accumulation and the maximum content of chlorogenic acid is 2. 58%; the content of caffeic acid in stems and leaves of Trillium tschonoskii Maxim. increases slightly with the Se concentration,showing the promotion of Se to accumulation of caffeic acid is not significant;the content of rutin in stems and leaves of Trillium tschonoskii Maxim. firstly increases then declines with the increase in Se concentration,at25 mg/kg Se concentration,rutin reached the maximum value,showing the promotion of Se to rutin accumulation is not significant.
文摘目的通过头顶一颗珠HPLC指纹图谱化学模式识别,评价秦巴及不同产地间药材的质量差异。方法采用Hibar C 18色谱柱(250 mm×4.6 mm,5μm),乙腈-水为流动相进行梯度洗脱,建立头顶一颗珠HPLC指纹图谱,经相似度评价,聚类分析(CA)、主成分分析(PCA)及正交偏最小二乘判别分析(OPLS-DA)研究秦巴及外产地10批样品的质量差异。结果头顶一颗珠指纹图谱匹配得到23个共有色谱峰,其中21~23号峰依次指认为重楼皂苷Ⅶ、偏诺皂苷元-3-O-α-L-吡喃鼠李糖基-(1→4)-〔O-α-L-吡喃鼠李糖基-(1→2)〕-O-β-D-葡萄糖苷及重楼皂苷Ⅵ,各批次相似度在0.706~0.958之间。经化学模式识别10批药材样品可聚为3类,其中秦巴产的湖北神农架及陕西药材PCA综合得分较高,质量较好。OPLS-DA筛选出11个影响各批药材质量差异的色谱峰。结论建立的中药指纹图谱化学模式识别方法能明确秦巴产头顶一颗珠的道地品质,为其开发利用提供了质量评价依据。
文摘目的观察头顶一颗珠(TTM)对阿尔茨海默病(AD)模型大鼠海马、皮质抗氧化酶和过氧化脂质表达的影响。方法用岗田酸(OA)大鼠侧脑室注射制备大鼠阿尔茨海默病大鼠模型,TTM注射液(750、500、250 mg/kg)腹腔注射,并用维生素C(V it C)腹腔注射作阳性对照。测定正常组、模型组、阳性对照组、药物实验组海马、皮质超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)和丙二醛(MDA)的含量。结果模型组与正常组比较,SOD、GSH-Px降低(P<0.05,P<0.001),MDA增高(P<0.001)。药物实验组与阳性对照组比较,SOD、GSH-Px和MDA在TTM高、中剂量组差异明显(P<0.05),低剂量组差异不明显(P>0.05)。结论TTM抗衰老作用与增强脑组织SOD、GSH-Px活性、减少MDA蓄积有关。