Chlorogenic acid(5-CQA),neochlorogenic acid(3-CQA),and cryptochlorogenic acid(4-CQA),usually simultaneously exist in many traditional Chinese medicines(TCMs).However,insufficient attentions have been paid to the compa...Chlorogenic acid(5-CQA),neochlorogenic acid(3-CQA),and cryptochlorogenic acid(4-CQA),usually simultaneously exist in many traditional Chinese medicines(TCMs).However,insufficient attentions have been paid to the comparative metabolism study on these three isomeric constituents with similar effects on anti-inflammation until now.In this study,a novel strategy was established to perform comparative analysis of their metabolic fates in rats and elucidate the pharmacological mechanism of antiinflammation.Firstly,diagnostic product ions(DPIs)deduced from the representative reference standards were adopted to rapidly screen and characterize the metabolites in rat plasma,urine and faeces using UHPLC-Q-TOF MS.Subsequently,Network pharmacology was utilized to elucidate their anti-inflammatory mechanism.Consequently,a total of 73 metabolites were detected and characterized,including 50,47 and 43 metabolites for 5-CQA,4-CQA and 3-CQA,orderly.Moreover,the network pharmacology study indicated that these three isomeric constituents and their major metabolites with similar in vivo metabolic pathways exerted anti-inflammatory effects through co-owned 20 biological processes,which involved 10 major signal pathways and 159 potential targets.Our study shed light on the similarities and differences of the metabolic profiling and anti-inflammatory activity among these three isomeric constituents and set an example for the further researches on the active mechanism of isomeric constituents existing in TCMs based on comparative metabolism study.展开更多
When measured by laser induced breakdown spectroscopy, the characteristic parameters of the plasma fluctuate significantly with the experimental parameters, which would have a greater impact on the quantitative measur...When measured by laser induced breakdown spectroscopy, the characteristic parameters of the plasma fluctuate significantly with the experimental parameters, which would have a greater impact on the quantitative measurement. The effects of two experimental parameters, lens to sample distance(LTSD) and delay time, on plasma temperature and electron density were analyzed. Thereafter the optimal LTSD and delay time for quantitative analysis of Pb and Ni in soil were identified. Two element calibration curves were calculated by the internal standard method under the optimal LTSD and delay time. About the two elements, correlation coefficient of the calibration curves is above 0.993. The maximum relative standard deviation(RSD) were 4.47% and 4.76%, respectively, and the maximum relative errors were 12% and 4.8%, respectively. The experimental results showed that laser induced breakdown spectroscopy method in combination with plasma characteristic parameter analysis shows the advantage on quantitative analysis of heavy metals in soil.展开更多
基金supported by the Young and Creative Team for Talent Introduction of Shandong Province(No.10073004)Binzhou Medical University Scientific Research Fund for High-level Talents(Nos.2019KYQD06 and BY2018KYQD11)+1 种基金the Locality-University Cooperation Project of Yantai City(No.2019XDRHXMPT18)the Ability Establishment of Sustainable Use for Valuable Chinese Medicine Resources(No.2060302)。
文摘Chlorogenic acid(5-CQA),neochlorogenic acid(3-CQA),and cryptochlorogenic acid(4-CQA),usually simultaneously exist in many traditional Chinese medicines(TCMs).However,insufficient attentions have been paid to the comparative metabolism study on these three isomeric constituents with similar effects on anti-inflammation until now.In this study,a novel strategy was established to perform comparative analysis of their metabolic fates in rats and elucidate the pharmacological mechanism of antiinflammation.Firstly,diagnostic product ions(DPIs)deduced from the representative reference standards were adopted to rapidly screen and characterize the metabolites in rat plasma,urine and faeces using UHPLC-Q-TOF MS.Subsequently,Network pharmacology was utilized to elucidate their anti-inflammatory mechanism.Consequently,a total of 73 metabolites were detected and characterized,including 50,47 and 43 metabolites for 5-CQA,4-CQA and 3-CQA,orderly.Moreover,the network pharmacology study indicated that these three isomeric constituents and their major metabolites with similar in vivo metabolic pathways exerted anti-inflammatory effects through co-owned 20 biological processes,which involved 10 major signal pathways and 159 potential targets.Our study shed light on the similarities and differences of the metabolic profiling and anti-inflammatory activity among these three isomeric constituents and set an example for the further researches on the active mechanism of isomeric constituents existing in TCMs based on comparative metabolism study.
基金supported by the Key Projects of Natural Science Foundation of Hebei Province(No.E2017201142)the 2018 Ministry of Education"Chunhui Program"Cooperative Scientific Research Projects+1 种基金the Postdoctoral Research Projects in Hebei Province(No.B2016003008)the Hebei Provincial Natural Science Youth Fund(No.D2012201115).
文摘When measured by laser induced breakdown spectroscopy, the characteristic parameters of the plasma fluctuate significantly with the experimental parameters, which would have a greater impact on the quantitative measurement. The effects of two experimental parameters, lens to sample distance(LTSD) and delay time, on plasma temperature and electron density were analyzed. Thereafter the optimal LTSD and delay time for quantitative analysis of Pb and Ni in soil were identified. Two element calibration curves were calculated by the internal standard method under the optimal LTSD and delay time. About the two elements, correlation coefficient of the calibration curves is above 0.993. The maximum relative standard deviation(RSD) were 4.47% and 4.76%, respectively, and the maximum relative errors were 12% and 4.8%, respectively. The experimental results showed that laser induced breakdown spectroscopy method in combination with plasma characteristic parameter analysis shows the advantage on quantitative analysis of heavy metals in soil.
