Triptolide(TP) from Tripterygium wilfordii has been demonstrated to possess anti-inflammatory, immunosuppressive, and anticancer activities. TP is specially used for the treatment of awkward rheumatoid arthritis, but ...Triptolide(TP) from Tripterygium wilfordii has been demonstrated to possess anti-inflammatory, immunosuppressive, and anticancer activities. TP is specially used for the treatment of awkward rheumatoid arthritis, but its clinical application is confined by intense side effects. It is reported that licorice can obviously reduce the toxicity of TP, but the detailed mechanisms involved have not been comprehensively investigated. The current study aimed to explore metabolomics characteristics of the toxic reaction induced by TP and the intervention effect of licorice water extraction(LWE) against such toxicity. Obtained urine samples from control, TP and TP + LWE treated rats were analyzed by UPLC/ESI-QTOF-MS. The metabolic profiles of the control and the TP group were well differentiated by the principal component analysis and orthogonal partial least squares-discriminant analysis. The toxicity of TP was demonstrated to be evolving along with the exposure time of TP. Eight potential biomarkers related to TP toxicity were successfully identified in urine samples. Furthermore, LWE treatment could attenuate the change in six of the eight identified biomarkers. Functional pathway analysis revealed that the alterations in these metabolites were associated with tryptophan, pantothenic acid, and porphyrin metabolism. Therefore, it was concluded that LWE demonstrated interventional effects on TP toxicity through regulation of tryptophan, pantothenic acid, and porphyrin metabolism pathways, which provided novel insights into the possible mechanisms of TP toxicity as well as the potential therapeutic effects of LWE against such toxicity.展开更多
Investigation of amino acids in hydrothermal systems is of prime importance for the understanding of geochemistry and microbiology of hydrothermal vents and plumes, for carbon and metals global cycles, for metabolism ...Investigation of amino acids in hydrothermal systems is of prime importance for the understanding of geochemistry and microbiology of hydrothermal vents and plumes, for carbon and metals global cycles, for metabolism of some hydrothermal microorganisms and for the origin of life issue. Extensive theoretical and experimental work on amino acids behaviour in hydrothermal fluids has been done, conversely only few data exist on natural samples. Because each hydrothermal vent is unique, the more data we collect the better we will be able to address each of these questions. Usually amino acids in hydrothermal fluids have been measured by HPLC-FLD. The chromatographic separation was at least 26 min and up to 135 min and the required derivatization step may be time consuming, may use harmful chemicals and may be source of contamination. Alternatively, we describe here a method combining quickness (4.5 min), high resolution (10,000), very low LOD (sub-ppb) and without derivatization. Characterisation and separation of 10 relevant proteinogenic underivatized amino acids was achieved by ion-pairing reversed-phase Ultra-high Performance Liquid Chromatography-Electrospray Ionisation-Quadrupole Time of Flight-Mass Spectrometry (UPLC-ESI-QTOF-MS). Excellent linearity in the response was obtained for all amino acids with correlation coefficients > 0.9921. This method was successfully applied to natural hydrothermal fluid samples from ultramafic-hosted vents of the Mid-Atlantic Ridge region. Results are consistent with the only 2 other studies published on ultramafic-hosted vents and complete the few available data.展开更多
目的建立超高效液相色谱-串联质谱法(ultra high performance liquid chromatography tandem mass spectrometry,UPLCMS/MS)检测毛蕊花糖苷干预不育症模型大鼠血浆睾酮的含量,测定不育症模型大鼠血浆24 h睾酮含量,并借助药动学理论定量...目的建立超高效液相色谱-串联质谱法(ultra high performance liquid chromatography tandem mass spectrometry,UPLCMS/MS)检测毛蕊花糖苷干预不育症模型大鼠血浆睾酮的含量,测定不育症模型大鼠血浆24 h睾酮含量,并借助药动学理论定量评价干预效果。方法大鼠含药血浆以睾酮-C3为内标,用液液萃取法,以12000 r·min^(-1)离心10 min,取上清液,5μL进样分析。以Acquity UPLCⅢBEH C_(18)(50 mm×2.1 mm,1.7μm)为色谱柱;以甲醇为流动相A、5 mL·L^(-1)甲酸溶液为流动相B进行梯度洗脱,洗脱程序:流速为0.2 mL∙min^(-1);柱温为35℃;样品室温度为4℃;运行时间为10 min;质量检测器使用ESI离子源,正模式检测,睾酮及内标睾酮-C3用于定量的母→子离子对分别为m/z 289.2→97.0、m/z 291.4→101.1。借助药动学软件分析,获取空白组和毛蕊花糖苷干预组大鼠体内24 h睾酮曲线下面积(area under the curve,AUC)数据。结果睾酮质量浓度在1~1000 ng·mL^(-1)范围内呈良好的线性关系。该方法日内、日间精密度RSD值均<10.84%,日内、日间准确度RE均<10.03%,样品提取回收率为95.82%~99.17%,置于进样器于4℃冰箱及长期冷冻稳定性RSD值均<10.63%。测定结果显示,毛蕊花糖苷干预组药峰浓度(peak concentration,C_(max))为7.92 ng·mL^(-1),空白组C_(max)为10.26 ng·mL^(-1)。与空白组比较,毛蕊花糖苷干预组大鼠体内睾酮24 h总AUC相对平稳。结论建立了UPLC-MS/MS测定不育症模型大鼠血浆睾酮含量的方法。从PK/PD角度比较分析推测出,给予毛蕊花糖苷干预后,不育症模型大鼠的24 h总体睾酮可基本恢复正常水平,从而发挥改善大鼠雄性生殖功能的作用。展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.81160541and 81373946)the Project of Health Department of Jiangxi Province(Grant No.2011A143)the priority academic program development of Jiangsu higher education institutions(PAPD)
文摘Triptolide(TP) from Tripterygium wilfordii has been demonstrated to possess anti-inflammatory, immunosuppressive, and anticancer activities. TP is specially used for the treatment of awkward rheumatoid arthritis, but its clinical application is confined by intense side effects. It is reported that licorice can obviously reduce the toxicity of TP, but the detailed mechanisms involved have not been comprehensively investigated. The current study aimed to explore metabolomics characteristics of the toxic reaction induced by TP and the intervention effect of licorice water extraction(LWE) against such toxicity. Obtained urine samples from control, TP and TP + LWE treated rats were analyzed by UPLC/ESI-QTOF-MS. The metabolic profiles of the control and the TP group were well differentiated by the principal component analysis and orthogonal partial least squares-discriminant analysis. The toxicity of TP was demonstrated to be evolving along with the exposure time of TP. Eight potential biomarkers related to TP toxicity were successfully identified in urine samples. Furthermore, LWE treatment could attenuate the change in six of the eight identified biomarkers. Functional pathway analysis revealed that the alterations in these metabolites were associated with tryptophan, pantothenic acid, and porphyrin metabolism. Therefore, it was concluded that LWE demonstrated interventional effects on TP toxicity through regulation of tryptophan, pantothenic acid, and porphyrin metabolism pathways, which provided novel insights into the possible mechanisms of TP toxicity as well as the potential therapeutic effects of LWE against such toxicity.
文摘Investigation of amino acids in hydrothermal systems is of prime importance for the understanding of geochemistry and microbiology of hydrothermal vents and plumes, for carbon and metals global cycles, for metabolism of some hydrothermal microorganisms and for the origin of life issue. Extensive theoretical and experimental work on amino acids behaviour in hydrothermal fluids has been done, conversely only few data exist on natural samples. Because each hydrothermal vent is unique, the more data we collect the better we will be able to address each of these questions. Usually amino acids in hydrothermal fluids have been measured by HPLC-FLD. The chromatographic separation was at least 26 min and up to 135 min and the required derivatization step may be time consuming, may use harmful chemicals and may be source of contamination. Alternatively, we describe here a method combining quickness (4.5 min), high resolution (10,000), very low LOD (sub-ppb) and without derivatization. Characterisation and separation of 10 relevant proteinogenic underivatized amino acids was achieved by ion-pairing reversed-phase Ultra-high Performance Liquid Chromatography-Electrospray Ionisation-Quadrupole Time of Flight-Mass Spectrometry (UPLC-ESI-QTOF-MS). Excellent linearity in the response was obtained for all amino acids with correlation coefficients > 0.9921. This method was successfully applied to natural hydrothermal fluid samples from ultramafic-hosted vents of the Mid-Atlantic Ridge region. Results are consistent with the only 2 other studies published on ultramafic-hosted vents and complete the few available data.
