Eleutheroside B or E, the main component of Acanthopanax, can relieve fatigue, enhance memory, and improve human cognition. Numerous studies have confirmed that high doses of acetylcholine significantly attenuate clin...Eleutheroside B or E, the main component of Acanthopanax, can relieve fatigue, enhance memory, and improve human cognition. Numerous studies have confirmed that high doses of acetylcholine significantly attenuate clinical symptoms and delay the progression of Alzheimer＇s disease. The present study replicated a rat model of aging induced by injecting quinolinic acid into the hippocampal CA1 region. These rats were intraperitoneally injected with low, medium and high doses of eleutheroside B or E （50, 100, 200 mg/kg）, and rats injected with Huperzine A or PBS were used as controls. At 4 weeks after administration, behavioral tests showed that the escape latencies and errors in searching for the platform in a Morris water maze were dose-dependently reduced in rats treated with medium and high-dose eleutheroside B or E. Hematoxylin-eosin staining showed that the number of surviving hippocampal neurons was greater and pathological injury was milder in three eleutheroside B or E groups compared with model group. Hippocampal homogenates showed enhanced cholinesterase activity, and dose-dependent increases in acetylcholine content and decreases in choline content following eleutheroside B or E treatment, similar to those seen in the Huperzine A group. These findings indicate that eleutheroside B or E improves learning and memory in aged rats. These effects of eleutheroside B or E may be mediated by activation of cholinesterase or enhanced reuse of choline to accelerate the synthesis of acetylcholine in hippocampal neurons.展开更多
Apoptosis and viability of PC12 cells following 1-methyl-4-phenylpyridinium ion （MPP＋）-induced injury were monitored by flow cytometry, following Annexin V-propidium iodide double labeling, and 3-（4,5-Dimethylthia...Apoptosis and viability of PC12 cells following 1-methyl-4-phenylpyridinium ion （MPP＋）-induced injury were monitored by flow cytometry, following Annexin V-propidium iodide double labeling, and 3-（4,5-Dimethylthiazol-2-yl）-2,5-diphenyltetrazolium bromide assay, respectively. The release of lactate dehydrogenase, superoxide dismutase activity and levels of malondialdehyde were determined by UV spectrophotometry. The changes in mitochondrial membrane potential and the intracellular concentration of calcium were determined by flow cytometry, and the activity of caspase-3 was monitored by western blot. According to cell viability and apoptosis studies, MPP＋-induced apoptosis in PC12 cells was inhibited in the presence of 10 tJg/mL of Eleutheroside B Our results indicate that the neuroprotective effect of Eleutheroside B, following MPP＋-induced apoptosis in PC12 cells, involves increasing the anti-oxidative stress capacity of cells, maintaining the high-energy state of mitochondrial membrane potential, reducing intracellular calcium concentration and inhibiting caspase-3 activity.展开更多
目的:建立大鼠血浆中刺五加苷 E 和刺五加苷 B 的 RP-HPLC 分析方法,并对这2种成分在大鼠体内过程特性进行分析研究。方法:用乙腈沉淀生物样品中的蛋白质,同时又将生物样品中的刺五加苷 B 和苷 E 提取出来,然后用固相萃取法分离提取物,...目的:建立大鼠血浆中刺五加苷 E 和刺五加苷 B 的 RP-HPLC 分析方法,并对这2种成分在大鼠体内过程特性进行分析研究。方法:用乙腈沉淀生物样品中的蛋白质,同时又将生物样品中的刺五加苷 B 和苷 E 提取出来,然后用固相萃取法分离提取物,用60%甲醇将刺五加苷 B 和苷 E 从固相萃取小柱洗脱下来,用高效液相色谱法提取出来测定,色谱柱为 KromasilODS(4.6mm×250mm,5pan),柱温25℃,水-乙腈梯度流动相(0→15min,90:10→80:20;15→25min,80:20→50:50),流速0.8mL·min^(-1),一次进样,分别在220nm和206nm 波长下检测刺五加苷 E 和苷 B。结果:Wister 大鼠一次股静脉给药后血药浓度时间曲线呈三室模型,刺五加苷 E 和苷 B 的消除半衰期 t_(1/2)分别为4.66和2.49h。在主要组织中的分布特点是:刺五加苷 E 在血液、肾脏、心脏、肝脏和脾脏中都有分布,刺五加苷 B 在血液、肾脏、心脏、肝脏中都有分布,在脾脏中没有分布,刺五加苷 E 和苷 B 主要由肝、肾代谢、排泄。结论:本法可用于刺五加苷 E 和刺五加苷 B 体内过程的研究。样品直接用固相萃取小柱处理,可消除内源性成分干扰。展开更多
基金supported by the Foundation from Department of Education of Hubei Province,No.D20111903
文摘Eleutheroside B or E, the main component of Acanthopanax, can relieve fatigue, enhance memory, and improve human cognition. Numerous studies have confirmed that high doses of acetylcholine significantly attenuate clinical symptoms and delay the progression of Alzheimer＇s disease. The present study replicated a rat model of aging induced by injecting quinolinic acid into the hippocampal CA1 region. These rats were intraperitoneally injected with low, medium and high doses of eleutheroside B or E （50, 100, 200 mg/kg）, and rats injected with Huperzine A or PBS were used as controls. At 4 weeks after administration, behavioral tests showed that the escape latencies and errors in searching for the platform in a Morris water maze were dose-dependently reduced in rats treated with medium and high-dose eleutheroside B or E. Hematoxylin-eosin staining showed that the number of surviving hippocampal neurons was greater and pathological injury was milder in three eleutheroside B or E groups compared with model group. Hippocampal homogenates showed enhanced cholinesterase activity, and dose-dependent increases in acetylcholine content and decreases in choline content following eleutheroside B or E treatment, similar to those seen in the Huperzine A group. These findings indicate that eleutheroside B or E improves learning and memory in aged rats. These effects of eleutheroside B or E may be mediated by activation of cholinesterase or enhanced reuse of choline to accelerate the synthesis of acetylcholine in hippocampal neurons.
基金the Major Projects of National Science and Technology, No.2009ZX09103-329the National Natural Science Foundation for Distinguished Young Scholars of China, No.30901974+1 种基金Outstanding Youth Science Fund Program of Heilongjiang Province, No.JC200705"Spring Sunshine" Plan of Ministry of Education, No.2006
文摘Apoptosis and viability of PC12 cells following 1-methyl-4-phenylpyridinium ion （MPP＋）-induced injury were monitored by flow cytometry, following Annexin V-propidium iodide double labeling, and 3-（4,5-Dimethylthiazol-2-yl）-2,5-diphenyltetrazolium bromide assay, respectively. The release of lactate dehydrogenase, superoxide dismutase activity and levels of malondialdehyde were determined by UV spectrophotometry. The changes in mitochondrial membrane potential and the intracellular concentration of calcium were determined by flow cytometry, and the activity of caspase-3 was monitored by western blot. According to cell viability and apoptosis studies, MPP＋-induced apoptosis in PC12 cells was inhibited in the presence of 10 tJg/mL of Eleutheroside B Our results indicate that the neuroprotective effect of Eleutheroside B, following MPP＋-induced apoptosis in PC12 cells, involves increasing the anti-oxidative stress capacity of cells, maintaining the high-energy state of mitochondrial membrane potential, reducing intracellular calcium concentration and inhibiting caspase-3 activity.
文摘目的:建立大鼠血浆中刺五加苷 E 和刺五加苷 B 的 RP-HPLC 分析方法,并对这2种成分在大鼠体内过程特性进行分析研究。方法:用乙腈沉淀生物样品中的蛋白质,同时又将生物样品中的刺五加苷 B 和苷 E 提取出来,然后用固相萃取法分离提取物,用60%甲醇将刺五加苷 B 和苷 E 从固相萃取小柱洗脱下来,用高效液相色谱法提取出来测定,色谱柱为 KromasilODS(4.6mm×250mm,5pan),柱温25℃,水-乙腈梯度流动相(0→15min,90:10→80:20;15→25min,80:20→50:50),流速0.8mL·min^(-1),一次进样,分别在220nm和206nm 波长下检测刺五加苷 E 和苷 B。结果:Wister 大鼠一次股静脉给药后血药浓度时间曲线呈三室模型,刺五加苷 E 和苷 B 的消除半衰期 t_(1/2)分别为4.66和2.49h。在主要组织中的分布特点是:刺五加苷 E 在血液、肾脏、心脏、肝脏和脾脏中都有分布,刺五加苷 B 在血液、肾脏、心脏、肝脏中都有分布,在脾脏中没有分布,刺五加苷 E 和苷 B 主要由肝、肾代谢、排泄。结论:本法可用于刺五加苷 E 和刺五加苷 B 体内过程的研究。样品直接用固相萃取小柱处理,可消除内源性成分干扰。
