The polysaccharides extracted from Inula britannica flower（IBP） exhibited a significant anti-liver injury activity.The properties and chemical compositions of IBP were analyzed via high performance liquid chromatogr...The polysaccharides extracted from Inula britannica flower（IBP） exhibited a significant anti-liver injury activity.The properties and chemical compositions of IBP were analyzed via high performance liquid chromatography（HPLC） and infrared spectroscopy（IR） methods.The results show that the molecular weight distribution of IBP is from 600 to 3500.The weight-average molecular weight is 1099.IBP consists of mannose,glucuronic acid,rhamnose,galacturonic acid,glucose,galactose and arabinose with a molar ratio of 4.1：1：1.4：2.7：14.6：6.3：7.9.The IR spectrum of IBP reveals the typical characteristics of polysaccharides and proteins.After administration of IBP with 100,50 and 25 mg/kg body mass to liver injury mice induced by CCl 4 or bacillus calmette guerin-lipopolysaccharide（BCG-LPS）,not only the blood alanine aminotransferase（ALT） and aspartate aminotransferase（AST） levels decreased significantly（P0.05）,but aslo the liver tissue malondialdehyde（MDA） level decreased significantly（P0.01）.The superoxide dismutase（SOD） level increased significantly（P0.01）.IBP shows significant anti-liver injury and antioxidation activity.展开更多
The aim of this study was to determine the extraction technique of supercritical fluid carbon dioxide（SF-CO 2） for the essential oil from Inula britannica flowers and its antifungal activities against plant pathogen...The aim of this study was to determine the extraction technique of supercritical fluid carbon dioxide（SF-CO 2） for the essential oil from Inula britannica flowers and its antifungal activities against plant pathogenic fungi for its potential application as botanical fungicide.The effects of factors,including extraction temperature,extraction pressure,SF-CO 2 flow rate,flower powder size,and time on the essential oil yield were studied using the single factor experiment.An orthogonal experiment was conducted to determine the best operating conditions for the maximum extraction oil yield.Adopting the optimum conditions,the maximum yield reached 10.01% at 40°C temperature,30 MPa pressure,60 mesh flower powder size,20 L h-1SF-CO 2 flow rate,and 90 min extraction time.The antifungal activities of I.britannica essential oil using the SF-CO 2 against the most important plant pathogenic fungi were also examined through in vitro and in vivo tests.Sixteen plant pathogenic fungi were inhibited to varying degrees at 1 mg mL-1concentration of the essential oil.The mycelial growth of Gaeumannomyces graminis var.tritici was completely inhibited.The radial growths of Phytophthora capsici and Fusarium monilifome were also inhibited by 83.76 and 64.69%,respectively.In addition,the essential oil can inhibit the spore germination of Fusarium oxysporum f.sp.vasinfectum,Phytophthora capsici,Colletotrichum orbiculare,and Pyricularia grisea,and the corresponding inhibition rates were 98.26,96.54,87.89,and 87.35% respectively.The present study has demonstrated that the essential oil of I.britannica flowers extracted through the SF-CO 2 technique is one potential and promising antifungal agent that can be used as botanical fungicide to protect crops.展开更多
Objective To establish a rapid method for detecting acetylbritannilactone （ABL） by online sweeping-micellar electrokinetic chromatography （MEKC） and to elevate the sensitivity of the detection. Methods The combina...Objective To establish a rapid method for detecting acetylbritannilactone （ABL） by online sweeping-micellar electrokinetic chromatography （MEKC） and to elevate the sensitivity of the detection. Methods The combination of online sweeping technique with MEKC was used to determine the content of ABL in the extract of Inula britannica in plasma of rats. Results ABL was completely separated within 15 min in running buffer and sample buffer. The optimal conditions were as follows： on uncoated fused quartz silica capillary, with separation voltage of 23 kV, capillary temperature of 25 oC, and detection wavelength of 195 nm. The regression equations revealed good linear relationships between the peak area and concentration of ABL （r = 0.998）, with the detection limits of 0.005-0.15 mg/mL. The relative standard deviations of migration time and peak areas for intra- and inter-batch were 〈 2.45% and 〈 2.26%, respectively. The recovery rate of this method was 96.3~97.2%. Conclusion This method provides some advantages in separation speed, testing sensitivity, and operating convenience, with low sample and reagent consumption. The online sweeping-MEKC is an effective method for pharmacokinetic study and analysis on tracing biological samples.展开更多
目的探讨欧亚旋覆花总黄酮(IBFTF)对衰老大鼠骨髓间充质干细胞(BMSC)的改善效果及其机制。方法用D-半乳糖(D-galactose)诱导大鼠BMSC建立衰老细胞模型,采用(12.5、25、50)μg/m L IBFTF处理BMSC。CCK-8法检测细胞增殖,试剂盒测定过氧化...目的探讨欧亚旋覆花总黄酮(IBFTF)对衰老大鼠骨髓间充质干细胞(BMSC)的改善效果及其机制。方法用D-半乳糖(D-galactose)诱导大鼠BMSC建立衰老细胞模型,采用(12.5、25、50)μg/m L IBFTF处理BMSC。CCK-8法检测细胞增殖,试剂盒测定过氧化氢酶(CAT)和超氧化物歧化酶(SOD)活性,丙二醛(MDA)和活性氧(ROS)的含量,流式细胞术检测细胞凋亡,Western blot法检测BAX、Bcl-2、裂解的胱天蛋白酶3(c-caspase-3)的蛋白水平。结果衰老组细胞的增殖率、SOD和CAT活性较对照组明显降低,而不同剂量的IBFTF促进D-Gal诱导的衰老细胞的增殖、增加SOD和CAT活性。衰老组的凋亡细胞比例、ROS含量、MDA水平、BAX/Bcl-2比值和c-caspase-3的蛋白表达量增加,而用不同浓度IBFTF治疗可显著降低衰老大鼠BMSC的凋亡、ROS的生成、MDA水平、BAX/Bcl2比值和c-caspase-3的蛋白水平。结论 IBFTF通过增强抗氧化作用减少衰老大鼠BMSC的凋亡。展开更多
目的:探讨欧亚旋覆花总黄酮(Inula britannica flower total flavonoids,IBFTF)对D-半乳糖诱导的亚急性衰老模型小鼠的抗衰老作用。方法:随机将昆明小鼠分为6组(每组10只):空白对照组,模型组,维生素E(vitamin E,VE)组,欧亚旋覆花总黄酮...目的:探讨欧亚旋覆花总黄酮(Inula britannica flower total flavonoids,IBFTF)对D-半乳糖诱导的亚急性衰老模型小鼠的抗衰老作用。方法:随机将昆明小鼠分为6组(每组10只):空白对照组,模型组,维生素E(vitamin E,VE)组,欧亚旋覆花总黄酮低、中、高剂量组。空白对照组给予颈背部皮下注射0.3 m L生理盐水,其余组均给予等体积500 mg/kg D-半乳糖,每日1次,连续8周。造模第3周,低、中、高剂量组分别灌服0.5 m L欧亚旋覆花总黄酮100、200和400 mg/kg,VE组灌服等体积维生素E 100 mg/kg,空白对照组和模型组灌服等体积生理盐水,每日1次,连续6周。检测小鼠体质量、胸腺指数和脾指数,同时测定血清中抗氧化酶活性如超氧化物歧化酶(superoxide dismutase,SOD)、丙二醛(malondialdehyde,MDA)、过氧化氢酶(catalase,CAT)和谷胱甘肽过氧化物酶(glutathione peroxidase,GSH-Px)等衰老指标。β半乳糖苷酶染色试剂盒检测小鼠海马组织中衰老相关的β半乳糖苷酶含量。结果:低、中、高剂量组小鼠体质量明显高于模型组,差异具有统计学意义(P=0.053、P=0.001、P=0.000);低、中、高剂量组小鼠胸腺指数和脾指数明显高于模型组(均P=0.000);低、中、高剂量组小鼠血清中SOD、CAT和GSHPx活力明显高于模型组,其MDA含量低于模型组(均P=0.000);低、中、高剂量组小鼠海马组织β半乳糖苷酶(senescence-associated beta-galactosidase,SA-β-gal)阳性率明显低于模型组,差异有统计学意义(P=0.001、P=0.000、P=0.000)。结论:欧亚旋覆花总黄酮是一种天然抗氧化剂,可延缓D-半乳糖诱导的模型小鼠的机体衰老。展开更多
基金Supported by the Science and Technology Development Program of Jilin Province,China(No.20070917-01)the Technology Development Project of Jilin Province,China(No.201205020)
文摘The polysaccharides extracted from Inula britannica flower（IBP） exhibited a significant anti-liver injury activity.The properties and chemical compositions of IBP were analyzed via high performance liquid chromatography（HPLC） and infrared spectroscopy（IR） methods.The results show that the molecular weight distribution of IBP is from 600 to 3500.The weight-average molecular weight is 1099.IBP consists of mannose,glucuronic acid,rhamnose,galacturonic acid,glucose,galactose and arabinose with a molar ratio of 4.1：1：1.4：2.7：14.6：6.3：7.9.The IR spectrum of IBP reveals the typical characteristics of polysaccharides and proteins.After administration of IBP with 100,50 and 25 mg/kg body mass to liver injury mice induced by CCl 4 or bacillus calmette guerin-lipopolysaccharide（BCG-LPS）,not only the blood alanine aminotransferase（ALT） and aspartate aminotransferase（AST） levels decreased significantly（P0.05）,but aslo the liver tissue malondialdehyde（MDA） level decreased significantly（P0.01）.The superoxide dismutase（SOD） level increased significantly（P0.01）.IBP shows significant anti-liver injury and antioxidation activity.
基金supported by the Scientific and Technological Key Project of Henan Province, China (082102350006 and 102102310242)the College Young Teachers Projects of Henan Province, China (2010GGJS046)
文摘The aim of this study was to determine the extraction technique of supercritical fluid carbon dioxide（SF-CO 2） for the essential oil from Inula britannica flowers and its antifungal activities against plant pathogenic fungi for its potential application as botanical fungicide.The effects of factors,including extraction temperature,extraction pressure,SF-CO 2 flow rate,flower powder size,and time on the essential oil yield were studied using the single factor experiment.An orthogonal experiment was conducted to determine the best operating conditions for the maximum extraction oil yield.Adopting the optimum conditions,the maximum yield reached 10.01% at 40°C temperature,30 MPa pressure,60 mesh flower powder size,20 L h-1SF-CO 2 flow rate,and 90 min extraction time.The antifungal activities of I.britannica essential oil using the SF-CO 2 against the most important plant pathogenic fungi were also examined through in vitro and in vivo tests.Sixteen plant pathogenic fungi were inhibited to varying degrees at 1 mg mL-1concentration of the essential oil.The mycelial growth of Gaeumannomyces graminis var.tritici was completely inhibited.The radial growths of Phytophthora capsici and Fusarium monilifome were also inhibited by 83.76 and 64.69%,respectively.In addition,the essential oil can inhibit the spore germination of Fusarium oxysporum f.sp.vasinfectum,Phytophthora capsici,Colletotrichum orbiculare,and Pyricularia grisea,and the corresponding inhibition rates were 98.26,96.54,87.89,and 87.35% respectively.The present study has demonstrated that the essential oil of I.britannica flowers extracted through the SF-CO 2 technique is one potential and promising antifungal agent that can be used as botanical fungicide to protect crops.
基金Hebei Province Supporting Natural Science Fund(No.06276470)
文摘Objective To establish a rapid method for detecting acetylbritannilactone （ABL） by online sweeping-micellar electrokinetic chromatography （MEKC） and to elevate the sensitivity of the detection. Methods The combination of online sweeping technique with MEKC was used to determine the content of ABL in the extract of Inula britannica in plasma of rats. Results ABL was completely separated within 15 min in running buffer and sample buffer. The optimal conditions were as follows： on uncoated fused quartz silica capillary, with separation voltage of 23 kV, capillary temperature of 25 oC, and detection wavelength of 195 nm. The regression equations revealed good linear relationships between the peak area and concentration of ABL （r = 0.998）, with the detection limits of 0.005-0.15 mg/mL. The relative standard deviations of migration time and peak areas for intra- and inter-batch were 〈 2.45% and 〈 2.26%, respectively. The recovery rate of this method was 96.3~97.2%. Conclusion This method provides some advantages in separation speed, testing sensitivity, and operating convenience, with low sample and reagent consumption. The online sweeping-MEKC is an effective method for pharmacokinetic study and analysis on tracing biological samples.
文摘目的探讨欧亚旋覆花总黄酮(IBFTF)对衰老大鼠骨髓间充质干细胞(BMSC)的改善效果及其机制。方法用D-半乳糖(D-galactose)诱导大鼠BMSC建立衰老细胞模型,采用(12.5、25、50)μg/m L IBFTF处理BMSC。CCK-8法检测细胞增殖,试剂盒测定过氧化氢酶(CAT)和超氧化物歧化酶(SOD)活性,丙二醛(MDA)和活性氧(ROS)的含量,流式细胞术检测细胞凋亡,Western blot法检测BAX、Bcl-2、裂解的胱天蛋白酶3(c-caspase-3)的蛋白水平。结果衰老组细胞的增殖率、SOD和CAT活性较对照组明显降低,而不同剂量的IBFTF促进D-Gal诱导的衰老细胞的增殖、增加SOD和CAT活性。衰老组的凋亡细胞比例、ROS含量、MDA水平、BAX/Bcl-2比值和c-caspase-3的蛋白表达量增加,而用不同浓度IBFTF治疗可显著降低衰老大鼠BMSC的凋亡、ROS的生成、MDA水平、BAX/Bcl2比值和c-caspase-3的蛋白水平。结论 IBFTF通过增强抗氧化作用减少衰老大鼠BMSC的凋亡。
文摘目的:探讨欧亚旋覆花总黄酮(Inula britannica flower total flavonoids,IBFTF)对D-半乳糖诱导的亚急性衰老模型小鼠的抗衰老作用。方法:随机将昆明小鼠分为6组(每组10只):空白对照组,模型组,维生素E(vitamin E,VE)组,欧亚旋覆花总黄酮低、中、高剂量组。空白对照组给予颈背部皮下注射0.3 m L生理盐水,其余组均给予等体积500 mg/kg D-半乳糖,每日1次,连续8周。造模第3周,低、中、高剂量组分别灌服0.5 m L欧亚旋覆花总黄酮100、200和400 mg/kg,VE组灌服等体积维生素E 100 mg/kg,空白对照组和模型组灌服等体积生理盐水,每日1次,连续6周。检测小鼠体质量、胸腺指数和脾指数,同时测定血清中抗氧化酶活性如超氧化物歧化酶(superoxide dismutase,SOD)、丙二醛(malondialdehyde,MDA)、过氧化氢酶(catalase,CAT)和谷胱甘肽过氧化物酶(glutathione peroxidase,GSH-Px)等衰老指标。β半乳糖苷酶染色试剂盒检测小鼠海马组织中衰老相关的β半乳糖苷酶含量。结果:低、中、高剂量组小鼠体质量明显高于模型组,差异具有统计学意义(P=0.053、P=0.001、P=0.000);低、中、高剂量组小鼠胸腺指数和脾指数明显高于模型组(均P=0.000);低、中、高剂量组小鼠血清中SOD、CAT和GSHPx活力明显高于模型组,其MDA含量低于模型组(均P=0.000);低、中、高剂量组小鼠海马组织β半乳糖苷酶(senescence-associated beta-galactosidase,SA-β-gal)阳性率明显低于模型组,差异有统计学意义(P=0.001、P=0.000、P=0.000)。结论:欧亚旋覆花总黄酮是一种天然抗氧化剂,可延缓D-半乳糖诱导的模型小鼠的机体衰老。
