黑桑(Morus nigra L.)是桑属的一个种,具有悠久的栽培应用历史。黑桑不仅存在极为罕见的天然二十二倍体,而且其叶、茎、果中含有丰富的活性次生物质,具有抗氧化、抗炎、降血糖、美白等功能。本文系统总结关于黑桑的起源、分布、生物学...黑桑(Morus nigra L.)是桑属的一个种,具有悠久的栽培应用历史。黑桑不仅存在极为罕见的天然二十二倍体,而且其叶、茎、果中含有丰富的活性次生物质,具有抗氧化、抗炎、降血糖、美白等功能。本文系统总结关于黑桑的起源、分布、生物学特征、繁殖技术以及活性物质的功能和开发利用的研究进展,对上述研究中存在的一些争议进行了讨论,并提出今后对黑桑资源综合利用的主要研究方向和研究内容,以利于对黑桑种质资源的深入研究和更好地服务于我国黑桑的规模化栽培及资源的高效开发利用。展开更多
BACKGROUND： To date, a complete protein expression profile of the midbrain substantia nigra in a mouse model of chronic Parkinson＇s disease, induced by 1-methyl-4-phenyl-1, 2, 3, 6-tetrahydropyridine （MPTP）, does ...BACKGROUND： To date, a complete protein expression profile of the midbrain substantia nigra in a mouse model of chronic Parkinson＇s disease, induced by 1-methyl-4-phenyl-1, 2, 3, 6-tetrahydropyridine （MPTP）, does not exist. In addition, there are no reports of analysis of differential protein expression. OBJECTIVE： To separate and evaluate MPTP-induced differential protein expression through the use of proteomics in the substantia nigra of a mouse model of chronic Parkinson＇s disease. DESIGN： Randomized controlled animal study. SETTING： Department of Neurology, the First Affiliated Hospital, Chongqing Medical University. MATERIALS： Sixteen 8-10-week old, healthy, male, C57BL mice, weighing 20-25 g, and of clean grade, were provided by the Experimental Animal Center of Chongqing Medical University. The experimental animals were disposed according to ethical criteria. MPTP was provided by Sigma Company, USA; Pdquest 2D image analysis software and gelatum/irradiance image analysis system （ChemiDoc XRS） by Bio-Rad, USA; and Voyager DE-PROMALD1-TOF-MS mass spectroscopy analyzer by AB1 Company, USA. METHODS： This study was performed in Chongqing Neurological Laboratory between November 2006 and July 2007. Mice were randomly divided into model and control groups, with 8 mice in each group. Mice in the model group were received a subcutaneous injection of MPTP （25 mg＆g）, twice a week, for five successive weeks, to establish a chronic Parkinson＇s disease model. Mice in the control group received the same volume of a subcutaneous saline injection at the same time points. Mice were sacrificed by anesthesia to rapidly obtain the midbrain for protein separation of the substantia nigra. MAIN OUTCOME MEASURES： （1） 2-ED handbook （Bio-Rad Company） was referenced for two-dimensional electrophoresis, （2） PDQUEST8,0 analytical electrophoresis pattern was adopted to evaluate differential protein expression. （3） Peptide mass finger print map and data were retrieved on http：//www.prospector.ucsf.edu to compare differential substantia nigral protein expression in the two groups. RESULTS： Two-dimensional gel electrophoresis of substantia nigra tissue indicated that there were 33 differential protein expressions between the two groups. Three new proteins were evaluated, including α -enolase, which exhibited regulated expression, tumor necrosis factor ligand superfamily member 4, and cyclin-dependent kinase inhibitor 1B. CONCLUSION： There are three proteins that exhibit differential expression in the substantia nigra- α -enolase, tumor necrosis factor ligand superfamily member 4, and cyclin-dependent kinase inhibitor 1B.展开更多
The aim of this study is to examine seasonal changes in Cu and Co concentrations of three plant species for monitoring the effects of pollution in Elazig,Turkey.For this purpose,the leaves of the Pinus nigra L.,Cedrus...The aim of this study is to examine seasonal changes in Cu and Co concentrations of three plant species for monitoring the effects of pollution in Elazig,Turkey.For this purpose,the leaves of the Pinus nigra L.,Cedrus libani and Cupressus arizonica together with soil samples were collected from different points depending on traffic intensity,nearness the city center and cement factory as well as control location during different months of the year.Flame atomic absorption spectrophotometer(FAAS) was used for measurement of the metals in clear digests after the dry ashing method.Copper and Co concentrations were in the ranges from 1.3to 2.6mg.kg-1 and<LOD to 0.26mg.kg-1 for Pinus nigra L.,1.2to 4.7mg.kg-1 and<LOD to 0.41mg.kg-1 for Cedrus libani and 1.5to 4.8mg.kg-1 and<LOD to 0.42mg.kg-1 for Cupressus arizonica,respectively.The levels observed for Cu and Co in the soil ranged from 12to 38mg.kg-1 and 6.0to 17mg.kg-1,respectively.展开更多
目的:研究乳腺良恶性病变组织中β-半乳糖凝集素-3(galectin-3,gal-3)和接骨木凝集素(Sambucus nigra agglutinin,SNA)表达水平及其临床病理意义。方法:60例乳腺癌和30例乳腺良性病变组织常规制作石蜡包埋切片,gal-3染色方法为EnVsionT...目的:研究乳腺良恶性病变组织中β-半乳糖凝集素-3(galectin-3,gal-3)和接骨木凝集素(Sambucus nigra agglutinin,SNA)表达水平及其临床病理意义。方法:60例乳腺癌和30例乳腺良性病变组织常规制作石蜡包埋切片,gal-3染色方法为EnVsionTM免疫组织化学法和SNA染色法为ABC亲和免疫组织化学法。结果:乳腺癌gal-3和SNA阳性表达均为29例(48.3%),其评分值分别为2.07±2.25和2.12±2.26;乳腺良性病变gal-3和SNA阳性表达均为8例(26.7%),两者评分值分别为1.03±1.63和1.07±1.59;乳腺癌gal-3和SNA表达阳性率(χ2=3.89,P=0.048)及其评分(t=2.24,P=0.028;t=2.33,P=0.022)明显高于乳腺良性病变。雌激素受体(ER)阳性及CA15-3阴性病例gal-3和SNA表达评分明显低于ER阴性和CA15-3阳性病例(P<0.05或P<0.01);经Kaplan-Meier生存分析发现gal-3和SNA表达阳性患者术后5年生存率和平均生存期明显低于其阴性患者(P<0.05或P<0.01)。结论:Gal-3和SNA的表达对乳腺癌的发生发展和临床生物学行为可能有重要作用,gal-3和/或SNA阳性表达的乳腺癌提示预后不良。展开更多
Oxidative stress contributes to the pathogenesis of neurodegenerative diseases.With the aim to find reagents that reduce oxidative stress,a phage display library was screened for peptides mimicking a2,6-sialyllactose(...Oxidative stress contributes to the pathogenesis of neurodegenerative diseases.With the aim to find reagents that reduce oxidative stress,a phage display library was screened for peptides mimicking a2,6-sialyllactose(6'-SL),which is known to beneficially influence neural functions.Using Sambucus nigra lectin,which specifically binds to 6'-SL,we screened a phage display library and found a peptide comprising identical sequences of 12 amino acids.Mimetic peptide,reverse peptide and scrambled peptide were tested for inhibition of 6'-SL binding to the lectin.Indeed,lectin binding to 6'-SL was inhibited by the most frequently identified mimetic peptide,but not by the reverse or scrambled peptides,showing that this peptide mimics 6'-SL.Functionally,mimetic peptide,but not the reverse or scrambled peptides,increased viability and expression of neural cell adhesion molecule L1 in SK-N-SH human neuroblastoma cells,and promoted survival and neurite outgrowth of cultured mouse cerebellar granule neurons challenged by H_20_2-induced oxidative stress.The combined results indicate that the 6'-SL mimetic peptide promotes neuronal survival and neuritogenesis,thus raising hopes for the treatment of neurodegenerative diseases.This study was approved by the Medical Ethics Committee of Shantou University Medical College,China(approval No.SUMC 2014-004)on February 20,2014.展开更多
生长在新疆维吾尔自治区的药桑属于黑桑种(Morus nigra L.),是珍稀的药食兼用桑树品种资源。国内外研究者采用超临界流体萃取、超声波萃取以及反相高效液相色谱结合荧光检测等方法,从药桑的不同部位材料中分离鉴定出黄酮类、多糖类、生...生长在新疆维吾尔自治区的药桑属于黑桑种(Morus nigra L.),是珍稀的药食兼用桑树品种资源。国内外研究者采用超临界流体萃取、超声波萃取以及反相高效液相色谱结合荧光检测等方法,从药桑的不同部位材料中分离鉴定出黄酮类、多糖类、生物碱、二苯乙烯及苯骈呋喃类等生物活性物质,在药桑的桑椹中还分离检测出脂肪酸、总可溶性氮化合物、氨基酸、维生素、类胡萝卜素等成分;明确药桑作为药用植物资源,其含有的生物活性成分具有降血糖、抗肿瘤、抗氧化、抗炎症等药理作用。今后需要对药桑各个部位活性成分的高效提取分离、生物活性鉴定及应用开发等进行系统研究,深度发掘和利用药桑的医药保健功效。展开更多
文摘黑桑(Morus nigra L.)是桑属的一个种,具有悠久的栽培应用历史。黑桑不仅存在极为罕见的天然二十二倍体,而且其叶、茎、果中含有丰富的活性次生物质,具有抗氧化、抗炎、降血糖、美白等功能。本文系统总结关于黑桑的起源、分布、生物学特征、繁殖技术以及活性物质的功能和开发利用的研究进展,对上述研究中存在的一些争议进行了讨论,并提出今后对黑桑资源综合利用的主要研究方向和研究内容,以利于对黑桑种质资源的深入研究和更好地服务于我国黑桑的规模化栽培及资源的高效开发利用。
基金the National Natural Science Foundation of China, No. 30370499
文摘BACKGROUND： To date, a complete protein expression profile of the midbrain substantia nigra in a mouse model of chronic Parkinson＇s disease, induced by 1-methyl-4-phenyl-1, 2, 3, 6-tetrahydropyridine （MPTP）, does not exist. In addition, there are no reports of analysis of differential protein expression. OBJECTIVE： To separate and evaluate MPTP-induced differential protein expression through the use of proteomics in the substantia nigra of a mouse model of chronic Parkinson＇s disease. DESIGN： Randomized controlled animal study. SETTING： Department of Neurology, the First Affiliated Hospital, Chongqing Medical University. MATERIALS： Sixteen 8-10-week old, healthy, male, C57BL mice, weighing 20-25 g, and of clean grade, were provided by the Experimental Animal Center of Chongqing Medical University. The experimental animals were disposed according to ethical criteria. MPTP was provided by Sigma Company, USA; Pdquest 2D image analysis software and gelatum/irradiance image analysis system （ChemiDoc XRS） by Bio-Rad, USA; and Voyager DE-PROMALD1-TOF-MS mass spectroscopy analyzer by AB1 Company, USA. METHODS： This study was performed in Chongqing Neurological Laboratory between November 2006 and July 2007. Mice were randomly divided into model and control groups, with 8 mice in each group. Mice in the model group were received a subcutaneous injection of MPTP （25 mg＆g）, twice a week, for five successive weeks, to establish a chronic Parkinson＇s disease model. Mice in the control group received the same volume of a subcutaneous saline injection at the same time points. Mice were sacrificed by anesthesia to rapidly obtain the midbrain for protein separation of the substantia nigra. MAIN OUTCOME MEASURES： （1） 2-ED handbook （Bio-Rad Company） was referenced for two-dimensional electrophoresis, （2） PDQUEST8,0 analytical electrophoresis pattern was adopted to evaluate differential protein expression. （3） Peptide mass finger print map and data were retrieved on http：//www.prospector.ucsf.edu to compare differential substantia nigral protein expression in the two groups. RESULTS： Two-dimensional gel electrophoresis of substantia nigra tissue indicated that there were 33 differential protein expressions between the two groups. Three new proteins were evaluated, including α -enolase, which exhibited regulated expression, tumor necrosis factor ligand superfamily member 4, and cyclin-dependent kinase inhibitor 1B. CONCLUSION： There are three proteins that exhibit differential expression in the substantia nigra- α -enolase, tumor necrosis factor ligand superfamily member 4, and cyclin-dependent kinase inhibitor 1B.
文摘The aim of this study is to examine seasonal changes in Cu and Co concentrations of three plant species for monitoring the effects of pollution in Elazig,Turkey.For this purpose,the leaves of the Pinus nigra L.,Cedrus libani and Cupressus arizonica together with soil samples were collected from different points depending on traffic intensity,nearness the city center and cement factory as well as control location during different months of the year.Flame atomic absorption spectrophotometer(FAAS) was used for measurement of the metals in clear digests after the dry ashing method.Copper and Co concentrations were in the ranges from 1.3to 2.6mg.kg-1 and<LOD to 0.26mg.kg-1 for Pinus nigra L.,1.2to 4.7mg.kg-1 and<LOD to 0.41mg.kg-1 for Cedrus libani and 1.5to 4.8mg.kg-1 and<LOD to 0.42mg.kg-1 for Cupressus arizonica,respectively.The levels observed for Cu and Co in the soil ranged from 12to 38mg.kg-1 and 6.0to 17mg.kg-1,respectively.
文摘目的:研究乳腺良恶性病变组织中β-半乳糖凝集素-3(galectin-3,gal-3)和接骨木凝集素(Sambucus nigra agglutinin,SNA)表达水平及其临床病理意义。方法:60例乳腺癌和30例乳腺良性病变组织常规制作石蜡包埋切片,gal-3染色方法为EnVsionTM免疫组织化学法和SNA染色法为ABC亲和免疫组织化学法。结果:乳腺癌gal-3和SNA阳性表达均为29例(48.3%),其评分值分别为2.07±2.25和2.12±2.26;乳腺良性病变gal-3和SNA阳性表达均为8例(26.7%),两者评分值分别为1.03±1.63和1.07±1.59;乳腺癌gal-3和SNA表达阳性率(χ2=3.89,P=0.048)及其评分(t=2.24,P=0.028;t=2.33,P=0.022)明显高于乳腺良性病变。雌激素受体(ER)阳性及CA15-3阴性病例gal-3和SNA表达评分明显低于ER阴性和CA15-3阳性病例(P<0.05或P<0.01);经Kaplan-Meier生存分析发现gal-3和SNA表达阳性患者术后5年生存率和平均生存期明显低于其阴性患者(P<0.05或P<0.01)。结论:Gal-3和SNA的表达对乳腺癌的发生发展和临床生物学行为可能有重要作用,gal-3和/或SNA阳性表达的乳腺癌提示预后不良。
基金supported by the National Natural Science Foundation of China,No.81471279 and No.81171138(to WJZ)Talent Support Grant from Shantou University Medical College,China,No.2501220118(to WJZ)the Li Kashing Foundation,No.LD030302(to MS)
文摘Oxidative stress contributes to the pathogenesis of neurodegenerative diseases.With the aim to find reagents that reduce oxidative stress,a phage display library was screened for peptides mimicking a2,6-sialyllactose(6'-SL),which is known to beneficially influence neural functions.Using Sambucus nigra lectin,which specifically binds to 6'-SL,we screened a phage display library and found a peptide comprising identical sequences of 12 amino acids.Mimetic peptide,reverse peptide and scrambled peptide were tested for inhibition of 6'-SL binding to the lectin.Indeed,lectin binding to 6'-SL was inhibited by the most frequently identified mimetic peptide,but not by the reverse or scrambled peptides,showing that this peptide mimics 6'-SL.Functionally,mimetic peptide,but not the reverse or scrambled peptides,increased viability and expression of neural cell adhesion molecule L1 in SK-N-SH human neuroblastoma cells,and promoted survival and neurite outgrowth of cultured mouse cerebellar granule neurons challenged by H_20_2-induced oxidative stress.The combined results indicate that the 6'-SL mimetic peptide promotes neuronal survival and neuritogenesis,thus raising hopes for the treatment of neurodegenerative diseases.This study was approved by the Medical Ethics Committee of Shantou University Medical College,China(approval No.SUMC 2014-004)on February 20,2014.
文摘生长在新疆维吾尔自治区的药桑属于黑桑种(Morus nigra L.),是珍稀的药食兼用桑树品种资源。国内外研究者采用超临界流体萃取、超声波萃取以及反相高效液相色谱结合荧光检测等方法,从药桑的不同部位材料中分离鉴定出黄酮类、多糖类、生物碱、二苯乙烯及苯骈呋喃类等生物活性物质,在药桑的桑椹中还分离检测出脂肪酸、总可溶性氮化合物、氨基酸、维生素、类胡萝卜素等成分;明确药桑作为药用植物资源,其含有的生物活性成分具有降血糖、抗肿瘤、抗氧化、抗炎症等药理作用。今后需要对药桑各个部位活性成分的高效提取分离、生物活性鉴定及应用开发等进行系统研究,深度发掘和利用药桑的医药保健功效。
