Objective: The present study aimed to investigate the molecular events in alisol B 23-acetate(ABA) cytotoxic activity against a liver cancer cell line.Methods: First, we employed a quantitative proteomics approach bas...Objective: The present study aimed to investigate the molecular events in alisol B 23-acetate(ABA) cytotoxic activity against a liver cancer cell line.Methods: First, we employed a quantitative proteomics approach based on stable isotope labeling by amino acids in cell culture(SILAC) to identify the different proteins expressed in HepG2 liver cancer cells upon exposure to ABA. Next, bioinformatics analyses through DAVID and STRING on-line tools were used to predict the pathways involved. Finally, we applied functional validation including cell cycle analysis and Western blotting for apoptosis and mTOR pathway-related proteins to confirm the bioinformatics predictions.Results: We identified 330 different proteins with the SILAC-based quantitative proteomics approach. The bioinformatics analysis and the functional validation revealed that the mTOR pathway, ribosome biogenesis, cell cycle, and apoptosis pathways were differentially regulated by ABA. G1 cell cycle arrest, apoptosis and mTOR inhibition were confirmed.Conclusions: ABA, a potential mTOR inhibitor, induces the disruption of ribosomal biogenesis. It also affects the mTOR-MRP axis to cause G1 cell cycle arrest and finally leads to cancer cell apoptosis.展开更多
A sensitive and reliable ultra fast liquid chromatography tandem mass spectrometry(UFLC-MS/MS)method has been developed and validated for simultaneous quantitation of alisol A and alisol B 23-acetate from Alisma orien...A sensitive and reliable ultra fast liquid chromatography tandem mass spectrometry(UFLC-MS/MS)method has been developed and validated for simultaneous quantitation of alisol A and alisol B 23-acetate from Alisma orientale(Sam.)Juz.in rat plasma using diazepam as an internal standard(IS).The plasma samples were extracted by liquideliquid extraction with methyl tert-butyl ether and separated on a Venusil MP C18 column(100 mm×2.1 mm,3.0 mm)(Venusil,China)using gradient elution with the mobile phase consisting of methanol and 0.1%acetic acid in water at a flow rate of 0.4 ml/min.The two analytes were monitored with positive electrospray ionization by multiple reaction monitoring mode(MRM).The lower limit of quantitation was 5.00 ng/ml for alisol A and 5.00 ng/ml for alisol B 23-acetate.The calibration curves were linear in the range of 5.00 e2500 ng/ml for alisol A and 5e2500 ng/ml for alisol B 23-acetate.The mean extraction recoveries were above 63.8%for alisol A and 68.0%for alisol B 23-acetate from biological matrixes.Both intra-day and inter-day precision and accuracy of analytes were well within acceptance criteria(15%).The validated method was successfully applied to the pharmacokinetic study of alisol A and alisol B 23-acetate in rat plasma after oral administration of alcohol extract of Alismatis Rhizoma.展开更多
Objective Obesity is a global health concern with management strategies encompassing bariatric surgery and anti-obesity drugs;however,concerns regarding complexities and side effects persist,driving research for more ...Objective Obesity is a global health concern with management strategies encompassing bariatric surgery and anti-obesity drugs;however,concerns regarding complexities and side effects persist,driving research for more effective,low-risk strategies.The promotion of white adipose tissue(WAT)browning has emerged as a promising approach.Moreover,alisol B 23-acetate(AB23A)has demonstrated efficacy in addressing metabolic disorders,suggesting its potential as a therapeutic agent in obesity management.Therefore,in this study,we aimed to investigate the therapeutic potential of AB23A for mitigating obesity by regulating metabolic phenotypes and lipid distribution in mice fed a high-fat diet(HFD).Methods An obesity mouse model was established by administration of an HFD.Glucose and insulin metabolism were assessed via glucose and insulin tolerance tests.Adipocyte size was determined using hematoxylin and eosin staining.The expression of browning markers in WAT was evaluated using Western blotting and quantitative real-time polymerase chain reaction.Metabolic cage monitoring involved the assessment of various parameters,including food and water intake,energy metabolism,respiratory exchange rates,and physical activity.Moreover,oil red O staining was used to evaluate intracellular lipid accumulation.A bioinformatic analysis tool for identifying the molecular mechanisms of traditional Chinese medicine was used to examine AB23A targets and associated signaling pathways.Results AB23A administration significantly reduced the weight of obese mice,decreased the mass of inguinal WAT,epididymal WAT,and perirenal adipose tissue,improved glucose and insulin metabolism,and reduced adipocyte size.Moreover,treatment with AB23A promoted the expression of browning markers in WAT,enhanced overall energy metabolism in mice,and had no discernible effect on food intake,water consumption,or physical activity.In 3T3-L1 cells,AB23A inhibited lipid accumulation,and both AB23A and rapamycin inhibited the mammalian target of rapamycin-sterol regulatory element-binding protein-1(mTOR-SREBP1)signaling pathway.Furthermore,3-isobutyl-1-methylxanthine,dexamethasone and insulin,at concentrations of 0.25 mmol/L,0.25μmol/L and 1μg/mL,respectively,induced activation of the mTOR-SREBP1 signaling pathway,which was further strengthened by an mTOR activator MHY1485.Notably,MHY1485 reversed the beneficial effects of AB23A in 3T3-L1 cells.Conclusion AB23A promoted WAT browning by inhibiting the mTOR-SREBP1 signaling pathway,offering a potential strategy to prevent obesity.展开更多
目的:建立泽泻药材中24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 含量的测定方法。方法:采用高效液相色谱法;色谱柱:大连依利特 Hypersil C_(18)柱(250 mm×4.6 mm,5 μm);检测器:蒸发光散射检测器(ELSD);柱温:室温;流动相:乙腈-水(75:25)...目的:建立泽泻药材中24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 含量的测定方法。方法:采用高效液相色谱法;色谱柱:大连依利特 Hypersil C_(18)柱(250 mm×4.6 mm,5 μm);检测器:蒸发光散射检测器(ELSD);柱温:室温;流动相:乙腈-水(75:25);流速:0.8 mL·min^(-1);ELSD 气体流速:2.00 L·min^(-1);漂移管温度:82℃。结果:被测定峰与其他组分峰可达到基线分离,泽泻中24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 的线性范围分别是0.33～1.98 μg(r=0.9992)及0.31～3.12 μg(r=0.9999);平均回收率(n=6)分别为100.8%及98.7%,RSD 分别为1.2%及3.3%。结论:该方法准确、简便、重复性好,可作为泽泻中24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 的含量测定方法。展开更多
目的:建立测定泽泻药材与饮片中24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 含量的 HPLC-ELSD 方法。方法:AlltimaC_(18)色谱柱(250 mm×4.6 mm,5μm);流动相:甲醇-水(84:16);流速:0.5 mL·min^(-1);蒸发光散射检测器漂移管温度为60℃...目的:建立测定泽泻药材与饮片中24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 含量的 HPLC-ELSD 方法。方法:AlltimaC_(18)色谱柱(250 mm×4.6 mm,5μm);流动相:甲醇-水(84:16);流速:0.5 mL·min^(-1);蒸发光散射检测器漂移管温度为60℃,雾化气体流速为1.4 L·min^(-1)。结果:24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 的线性范围分别为4.2～105 μg·mL^(-1)(r=0.9980),4.6～115 μg·mL^(-1)(r=0.9991),平均回收率分别为99.9%(RSD 小于1.9%),100.7%(RSD 小于1.0%)。结论:该方法简便、准确、重复性好,可作为测定泽泻药材与饮片中24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 的有效方法。展开更多
基金supported by the National Natural Science Foundation of China (No. NSFC-81502406, 81673320)Education Scientific Research Project for young teachers, 2018 (No. JT180013)
文摘Objective: The present study aimed to investigate the molecular events in alisol B 23-acetate(ABA) cytotoxic activity against a liver cancer cell line.Methods: First, we employed a quantitative proteomics approach based on stable isotope labeling by amino acids in cell culture(SILAC) to identify the different proteins expressed in HepG2 liver cancer cells upon exposure to ABA. Next, bioinformatics analyses through DAVID and STRING on-line tools were used to predict the pathways involved. Finally, we applied functional validation including cell cycle analysis and Western blotting for apoptosis and mTOR pathway-related proteins to confirm the bioinformatics predictions.Results: We identified 330 different proteins with the SILAC-based quantitative proteomics approach. The bioinformatics analysis and the functional validation revealed that the mTOR pathway, ribosome biogenesis, cell cycle, and apoptosis pathways were differentially regulated by ABA. G1 cell cycle arrest, apoptosis and mTOR inhibition were confirmed.Conclusions: ABA, a potential mTOR inhibitor, induces the disruption of ribosomal biogenesis. It also affects the mTOR-MRP axis to cause G1 cell cycle arrest and finally leads to cancer cell apoptosis.
基金This study was financially supported by Liaoning Innovative Research Team in University(LNIRT,Grant No.LT2013022).
文摘A sensitive and reliable ultra fast liquid chromatography tandem mass spectrometry(UFLC-MS/MS)method has been developed and validated for simultaneous quantitation of alisol A and alisol B 23-acetate from Alisma orientale(Sam.)Juz.in rat plasma using diazepam as an internal standard(IS).The plasma samples were extracted by liquideliquid extraction with methyl tert-butyl ether and separated on a Venusil MP C18 column(100 mm×2.1 mm,3.0 mm)(Venusil,China)using gradient elution with the mobile phase consisting of methanol and 0.1%acetic acid in water at a flow rate of 0.4 ml/min.The two analytes were monitored with positive electrospray ionization by multiple reaction monitoring mode(MRM).The lower limit of quantitation was 5.00 ng/ml for alisol A and 5.00 ng/ml for alisol B 23-acetate.The calibration curves were linear in the range of 5.00 e2500 ng/ml for alisol A and 5e2500 ng/ml for alisol B 23-acetate.The mean extraction recoveries were above 63.8%for alisol A and 68.0%for alisol B 23-acetate from biological matrixes.Both intra-day and inter-day precision and accuracy of analytes were well within acceptance criteria(15%).The validated method was successfully applied to the pharmacokinetic study of alisol A and alisol B 23-acetate in rat plasma after oral administration of alcohol extract of Alismatis Rhizoma.
基金supported by Shandong Provincial Natural Science Foundation General Program(No.ZR2022MH213)Shandong Provincial Traditional Chinese Medicine Science and Technology Project General Program(No.M2023241)+1 种基金Jinan Clinical Medical Science and Technology Innovation Program(No.202328013)Qinghai Province High-end Innovative Talents Thousand Talents Program.
文摘Objective Obesity is a global health concern with management strategies encompassing bariatric surgery and anti-obesity drugs;however,concerns regarding complexities and side effects persist,driving research for more effective,low-risk strategies.The promotion of white adipose tissue(WAT)browning has emerged as a promising approach.Moreover,alisol B 23-acetate(AB23A)has demonstrated efficacy in addressing metabolic disorders,suggesting its potential as a therapeutic agent in obesity management.Therefore,in this study,we aimed to investigate the therapeutic potential of AB23A for mitigating obesity by regulating metabolic phenotypes and lipid distribution in mice fed a high-fat diet(HFD).Methods An obesity mouse model was established by administration of an HFD.Glucose and insulin metabolism were assessed via glucose and insulin tolerance tests.Adipocyte size was determined using hematoxylin and eosin staining.The expression of browning markers in WAT was evaluated using Western blotting and quantitative real-time polymerase chain reaction.Metabolic cage monitoring involved the assessment of various parameters,including food and water intake,energy metabolism,respiratory exchange rates,and physical activity.Moreover,oil red O staining was used to evaluate intracellular lipid accumulation.A bioinformatic analysis tool for identifying the molecular mechanisms of traditional Chinese medicine was used to examine AB23A targets and associated signaling pathways.Results AB23A administration significantly reduced the weight of obese mice,decreased the mass of inguinal WAT,epididymal WAT,and perirenal adipose tissue,improved glucose and insulin metabolism,and reduced adipocyte size.Moreover,treatment with AB23A promoted the expression of browning markers in WAT,enhanced overall energy metabolism in mice,and had no discernible effect on food intake,water consumption,or physical activity.In 3T3-L1 cells,AB23A inhibited lipid accumulation,and both AB23A and rapamycin inhibited the mammalian target of rapamycin-sterol regulatory element-binding protein-1(mTOR-SREBP1)signaling pathway.Furthermore,3-isobutyl-1-methylxanthine,dexamethasone and insulin,at concentrations of 0.25 mmol/L,0.25μmol/L and 1μg/mL,respectively,induced activation of the mTOR-SREBP1 signaling pathway,which was further strengthened by an mTOR activator MHY1485.Notably,MHY1485 reversed the beneficial effects of AB23A in 3T3-L1 cells.Conclusion AB23A promoted WAT browning by inhibiting the mTOR-SREBP1 signaling pathway,offering a potential strategy to prevent obesity.
文摘目的:建立泽泻药材中24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 含量的测定方法。方法:采用高效液相色谱法;色谱柱:大连依利特 Hypersil C_(18)柱(250 mm×4.6 mm,5 μm);检测器:蒸发光散射检测器(ELSD);柱温:室温;流动相:乙腈-水(75:25);流速:0.8 mL·min^(-1);ELSD 气体流速:2.00 L·min^(-1);漂移管温度:82℃。结果:被测定峰与其他组分峰可达到基线分离,泽泻中24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 的线性范围分别是0.33～1.98 μg(r=0.9992)及0.31～3.12 μg(r=0.9999);平均回收率(n=6)分别为100.8%及98.7%,RSD 分别为1.2%及3.3%。结论:该方法准确、简便、重复性好,可作为泽泻中24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 的含量测定方法。
文摘目的:建立测定泽泻药材与饮片中24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 含量的 HPLC-ELSD 方法。方法:AlltimaC_(18)色谱柱(250 mm×4.6 mm,5μm);流动相:甲醇-水(84:16);流速:0.5 mL·min^(-1);蒸发光散射检测器漂移管温度为60℃,雾化气体流速为1.4 L·min^(-1)。结果:24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 的线性范围分别为4.2～105 μg·mL^(-1)(r=0.9980),4.6～115 μg·mL^(-1)(r=0.9991),平均回收率分别为99.9%(RSD 小于1.9%),100.7%(RSD 小于1.0%)。结论:该方法简便、准确、重复性好,可作为测定泽泻药材与饮片中24-乙酰泽泻醇 A 和23-乙酰泽泻醇 B 的有效方法。
