Objective:To evaluate the antioxidant potential and pancreatic lipase inhibitory action of optimized hydroethanolic extracts of Solanum nigrum.Methods:Optimized extraction for maximum recovery of metabolites was perfo...Objective:To evaluate the antioxidant potential and pancreatic lipase inhibitory action of optimized hydroethanolic extracts of Solanum nigrum.Methods:Optimized extraction for maximum recovery of metabolites was performed using a combination of freeze-drying and ultrasonication followed by determination of antioxidant and antiobesity properties.The ultra-high performance liquid chromatography equipped with mass spectrometry was used to analyze metabolite profiling of Solanum nigrum.Computational studies were performed using molecular docking and electrostatic potential analysis for individual compounds.The hypolipidemic potential of the most potent extract was assessed in the obese mice fed on fat rich diet.Results:The 80%hydroethanolic extract exhibited the highest extract yield,total phenolic contents,total flavonoid contents along with the strongest 2,2-diphenyl-1-picrylhydrazyl scavenging activity,total antioxidant power,and pancreatic lipase inhibitory properties.The 80%hydroethanolic extract not only regulated the lipid profile of obese mice but also restricted the weight gain in the liver,kidney,and heart.The 80%hydroethanolic extract also reduced alanine transaminase and aspartate transaminase concentrations in serum.The effects of plant extract at 300 mg/kg body weight were quite comparable with the standard drug orlistat.Conclusions:Solanum nigrum is proved as an excellent and potent source of secondary metabolites that might be responsible for obesity mitigation.展开更多
采用UHPLC-QTOF-MS技术分析大鼠灌胃给予止咳宝片后的血浆生物样本。首先,在正、负离子模式下分别全扫描,通过信息依赖采集触发子离子的采集,每一循环采集8个最强峰的二级质谱图。采集时进行,实时多重质量亏损和动态背景扣除。其次,应用...采用UHPLC-QTOF-MS技术分析大鼠灌胃给予止咳宝片后的血浆生物样本。首先,在正、负离子模式下分别全扫描,通过信息依赖采集触发子离子的采集,每一循环采集8个最强峰的二级质谱图。采集时进行,实时多重质量亏损和动态背景扣除。其次,应用Metabolite Pilot 2.0软件对止咳宝片君药罂粟壳,配伍药物甘草中主要化学成分为目标建立分析模型,分析各成分的保留时间、精确分子质量、二级质谱信息,对代谢产物进行解析。鉴定5个阿片类生物碱、甘草苷和甘草酸,及其相关代谢产物31个。5种阿片类生物碱、甘草苷和甘草酸在大鼠体内的代谢途径包括葡萄糖醛酸化、硫酸化、脱甲基化、脱氨基甲基后羧基化、水解等。本文从定性角度对复方中药制剂中主要活性成分的体内代谢开展研究,并与已有单一化学药物代谢途径比较,为进一步阐明止咳宝片或含罂粟壳、甘草类复方中药制剂体内代谢过程提供基础。展开更多
目的基于超高效液相色谱-四极杆飞行时间质谱(ultra-high performance liquid chromatography-quadrupole time of flight mass spectrometry,UHPLC-QTOF-MS/MS)技术和中医药整合药理学研究平台(Chinese Medicine Integrated Pharmacolo...目的基于超高效液相色谱-四极杆飞行时间质谱(ultra-high performance liquid chromatography-quadrupole time of flight mass spectrometry,UHPLC-QTOF-MS/MS)技术和中医药整合药理学研究平台(Chinese Medicine Integrated Pharmacology Research Platform,TCMIP)v2.0筛选牡丹皮治疗慢性肾炎的活性成分,并初步分析其作用机制。方法采用UHPLC-QTOFMS/MS,分别在正、负离子扫描模式下对牡丹皮化学成分进行定性分析;基于TCMIP v2.0收集牡丹皮的候选靶标谱和慢性肾炎的基因集;基于TCMIP v2.0平台构建上述靶标间的蛋白间相互作用(protein-protein interaction,PPI)网络,根据网络特征值确定核心靶标;通过DAVID v6.8软件(http://david.abcc.ncifcrf.gov/)进行基因本体论(genetic ontology,GO)功能分析和京都基因与基因组百科全书(Kyoto encyclopedia of genes and genomes,KEGG)通路富集分析,筛选与慢性肾炎相关的通路作为核心通路;圈定核心通路对应靶标的化学成分,统计每个成分的靶点数量、靶点频次、成分含量;根据统计结果确定牡丹皮治疗慢性肾炎的核心成分;利用Cytoscape 3.8.0软件构建“成分-靶标-通路”多维关联网络。结果在正、负离子模式下共鉴定了牡丹皮中73个化学成分;通过分析PPI相互作用网络获得123个核心节点;KEGG富集分析确定了17条慢性肾炎相关通路;通过靶点数量、频次和响应值综合筛选得到13个核心成分。结论牡丹皮中的13个核心成分可能通过调控核因子-κB(nuclear factor-κB,NF-κB)通路、肾素分泌通路、磷脂酰肌醇-3-羟激酶(phosphatidylinositol-3-hydroxykinase,PI3K)/蛋白激酶B(protein kinase B,Akt)通路等17条通路治疗慢性肾炎,为进一步研究牡丹皮治疗慢性肾炎的作用机制奠定了数据基础。展开更多
Objective: Qianliguang(Senecio scandens) is a common Chinese medicinal herb. Qianliguang-containing herbal proprietary products are registered as over-the-counter remedies in China and exported to Western countries. T...Objective: Qianliguang(Senecio scandens) is a common Chinese medicinal herb. Qianliguang-containing herbal proprietary products are registered as over-the-counter remedies in China and exported to Western countries. The presence of hepatotoxic pyrrolizidine alkaloids(PAs)has raised concerns about the safety of using Qianliguang and its products. The present study aims at investigation of different types of PAs present in Qianliguang collected from representative locations in China.Methods: In this study, a simple but specific UHPLC-QTOF-MS method for the determination of toxic PAs was developed, based on the characteristic fragment ions specific to different types of PAs. It was successfully applied for the identification and distinguishing of PAs present in Qianliguang and related Senecio species growing in different locations of China.Results: Significant diversity of the PA types and quantities were revealed among the samples tested. The estimated total amounts of toxic PAs in three of the samples exceed the toxic limits of PA intake restricted by WHO, demonstrating the timely and highly demand for regulating both types and quantities of PAs present in Qianliguang.Conclusions: This study provides the methodology for simultaneous identification and quantification of PAs present in herbs without requiring corresponding standards, which could be further used for more systematic investigations of the PA distribution in Qianliguang and other PA-containing herbs.展开更多
文摘Objective:To evaluate the antioxidant potential and pancreatic lipase inhibitory action of optimized hydroethanolic extracts of Solanum nigrum.Methods:Optimized extraction for maximum recovery of metabolites was performed using a combination of freeze-drying and ultrasonication followed by determination of antioxidant and antiobesity properties.The ultra-high performance liquid chromatography equipped with mass spectrometry was used to analyze metabolite profiling of Solanum nigrum.Computational studies were performed using molecular docking and electrostatic potential analysis for individual compounds.The hypolipidemic potential of the most potent extract was assessed in the obese mice fed on fat rich diet.Results:The 80%hydroethanolic extract exhibited the highest extract yield,total phenolic contents,total flavonoid contents along with the strongest 2,2-diphenyl-1-picrylhydrazyl scavenging activity,total antioxidant power,and pancreatic lipase inhibitory properties.The 80%hydroethanolic extract not only regulated the lipid profile of obese mice but also restricted the weight gain in the liver,kidney,and heart.The 80%hydroethanolic extract also reduced alanine transaminase and aspartate transaminase concentrations in serum.The effects of plant extract at 300 mg/kg body weight were quite comparable with the standard drug orlistat.Conclusions:Solanum nigrum is proved as an excellent and potent source of secondary metabolites that might be responsible for obesity mitigation.
文摘采用UHPLC-QTOF-MS技术分析大鼠灌胃给予止咳宝片后的血浆生物样本。首先,在正、负离子模式下分别全扫描,通过信息依赖采集触发子离子的采集,每一循环采集8个最强峰的二级质谱图。采集时进行,实时多重质量亏损和动态背景扣除。其次,应用Metabolite Pilot 2.0软件对止咳宝片君药罂粟壳,配伍药物甘草中主要化学成分为目标建立分析模型,分析各成分的保留时间、精确分子质量、二级质谱信息,对代谢产物进行解析。鉴定5个阿片类生物碱、甘草苷和甘草酸,及其相关代谢产物31个。5种阿片类生物碱、甘草苷和甘草酸在大鼠体内的代谢途径包括葡萄糖醛酸化、硫酸化、脱甲基化、脱氨基甲基后羧基化、水解等。本文从定性角度对复方中药制剂中主要活性成分的体内代谢开展研究,并与已有单一化学药物代谢途径比较,为进一步阐明止咳宝片或含罂粟壳、甘草类复方中药制剂体内代谢过程提供基础。
文摘目的基于超高效液相色谱-四极杆飞行时间质谱(ultra-high performance liquid chromatography-quadrupole time of flight mass spectrometry,UHPLC-QTOF-MS/MS)技术和中医药整合药理学研究平台(Chinese Medicine Integrated Pharmacology Research Platform,TCMIP)v2.0筛选牡丹皮治疗慢性肾炎的活性成分,并初步分析其作用机制。方法采用UHPLC-QTOFMS/MS,分别在正、负离子扫描模式下对牡丹皮化学成分进行定性分析;基于TCMIP v2.0收集牡丹皮的候选靶标谱和慢性肾炎的基因集;基于TCMIP v2.0平台构建上述靶标间的蛋白间相互作用(protein-protein interaction,PPI)网络,根据网络特征值确定核心靶标;通过DAVID v6.8软件(http://david.abcc.ncifcrf.gov/)进行基因本体论(genetic ontology,GO)功能分析和京都基因与基因组百科全书(Kyoto encyclopedia of genes and genomes,KEGG)通路富集分析,筛选与慢性肾炎相关的通路作为核心通路;圈定核心通路对应靶标的化学成分,统计每个成分的靶点数量、靶点频次、成分含量;根据统计结果确定牡丹皮治疗慢性肾炎的核心成分;利用Cytoscape 3.8.0软件构建“成分-靶标-通路”多维关联网络。结果在正、负离子模式下共鉴定了牡丹皮中73个化学成分;通过分析PPI相互作用网络获得123个核心节点;KEGG富集分析确定了17条慢性肾炎相关通路;通过靶点数量、频次和响应值综合筛选得到13个核心成分。结论牡丹皮中的13个核心成分可能通过调控核因子-κB(nuclear factor-κB,NF-κB)通路、肾素分泌通路、磷脂酰肌醇-3-羟激酶(phosphatidylinositol-3-hydroxykinase,PI3K)/蛋白激酶B(protein kinase B,Akt)通路等17条通路治疗慢性肾炎,为进一步研究牡丹皮治疗慢性肾炎的作用机制奠定了数据基础。
基金Research Grant Council of Hong Kong(GRF Grants no.471310 and 469712)CUHK Direct Grant(2041744)
文摘Objective: Qianliguang(Senecio scandens) is a common Chinese medicinal herb. Qianliguang-containing herbal proprietary products are registered as over-the-counter remedies in China and exported to Western countries. The presence of hepatotoxic pyrrolizidine alkaloids(PAs)has raised concerns about the safety of using Qianliguang and its products. The present study aims at investigation of different types of PAs present in Qianliguang collected from representative locations in China.Methods: In this study, a simple but specific UHPLC-QTOF-MS method for the determination of toxic PAs was developed, based on the characteristic fragment ions specific to different types of PAs. It was successfully applied for the identification and distinguishing of PAs present in Qianliguang and related Senecio species growing in different locations of China.Results: Significant diversity of the PA types and quantities were revealed among the samples tested. The estimated total amounts of toxic PAs in three of the samples exceed the toxic limits of PA intake restricted by WHO, demonstrating the timely and highly demand for regulating both types and quantities of PAs present in Qianliguang.Conclusions: This study provides the methodology for simultaneous identification and quantification of PAs present in herbs without requiring corresponding standards, which could be further used for more systematic investigations of the PA distribution in Qianliguang and other PA-containing herbs.
