The pyrolysis of isopsoralen was studied by synchrotron vacuum ultraviolet photoionization mass spectrometry at low pressure. The pyrolysis products were detected at different photon energies, the ratios of products t...The pyrolysis of isopsoralen was studied by synchrotron vacuum ultraviolet photoionization mass spectrometry at low pressure. The pyrolysis products were detected at different photon energies, the ratios of products to precursor were measured at various pyrolysis temperatures. The experimental results demonstrate that the main pyrolysis products are primary CO and sequential CO elimination products （C10H602 and C9H60）. The decomposition channels of isopsoralen were also studied by the density functional theory, then rate constants for competing pathways were calculated by the transition state theory. The dominant decom- position channels of isopsoralen and the molecular structures for corresponding products were identified by combined experimental and theoretical studies.展开更多
Near infrared(NIR)assignment of Isopsoralen was performed using deuterated chloroform solvent and two-dimensional correlation spectroscopy(2D-COS)technology.Yunkang Oral Liquid was applied to study Isopsoralen,the cha...Near infrared(NIR)assignment of Isopsoralen was performed using deuterated chloroform solvent and two-dimensional correlation spectroscopy(2D-COS)technology.Yunkang Oral Liquid was applied to study Isopsoralen,the characteristic bands by spectral assignment as well as the bands by interval partial least squares(iPLS)and synergy interval partial least squares(siPLS)were used to establish partial least squares(PLS)model.The coefficient of determination in calibration(R^(2)_(cal))were 0.9987,0.9970 and 0.9982.The coefficient of determination in cross validation(R^(2)_(val)) T were 0.9985,0.9921 and 0.9982.The coe±cient of determination in prediction(R^(2)_(pre)) T were 0.9987,0.9955 and 0.9988.The root mean square error of calibration(RMSEC)were 0.27,0.40 and 0.31 ppm.The root mean square error of cross validation(RMSECV)were 0.30,0.67 and 0.32 ppm.The root mean square error of prediction(RMSEP)were 0.23,0.43 and 0.22 ppm.The residual predictive deviation(RPD)were 31.00,16.58 and 32.41.It turned out that the characteristic bands by spectral assignment had the same results with the chemometrics methods in PLS model.It provided guidance for NIR spectral assignment of chemical compositions in Chinese Materia Medica(CMM).展开更多
Objective： To investigate the protective effects of the natural medicinal monomer isopsoralen （ISR） with estrogenic activity against oxidative damage in human lens epithelial cells B3 （HLE-B3） caused by hydrogen ...Objective： To investigate the protective effects of the natural medicinal monomer isopsoralen （ISR） with estrogenic activity against oxidative damage in human lens epithelial cells B3 （HLE-B3） caused by hydrogen peroxide （H2O2） and to pursue the possible mitochondrial proteomic regularity of the protective effects. Methods： HLE-B3 cells were treated with H2O2 （300 μMol/L）, β-estradiol （E2：10^-8mol/L） and H2O2, ISR （10^-5 mol/L） and H2O2, or left untreated. Altered expressions of all mitochondrial proteins were analyzed by protein array and surface- enhanced laser desorpUon ionization time of flight mass spectrometry （SELDI-TOF-MS）. The mass/charge （m/z） ratios of each peak were tested by the Kruskal-Wallis rank sum test, and the protein peak value of the m/z ratio for each treatment by pair comparison was analyzed with the Nemenyi test. Results： H2O2 up-regulated the expressions of two protein spots （with m/z of 6532 and 6809）. E2 mitigated the oxidative damage, and the expression of one protein spot （m/z 6532） was down-regulated. In contrast, ISR down-regulated both of protein spots （m/z 6532 and 6809）. Conclusions： ISR could effectively inhibit H2O2-induced oxidative damage in HLE-B3 cells. The protein spot at m/z of 6532 might be the target spot of ISR against oxidative damage induced by H2O2.展开更多
Objective: To optimize a self-emulsifying drug delivery system(SEDDS) formulation for psoralen and isopsoralen(PSO and IPSO) isolated from Psoraleae Fructus.Methods: A D-optimal design was used to investigate the infl...Objective: To optimize a self-emulsifying drug delivery system(SEDDS) formulation for psoralen and isopsoralen(PSO and IPSO) isolated from Psoraleae Fructus.Methods: A D-optimal design was used to investigate the influence of oil percentage, surfactant percentage and cosurfactant percentage on several properties of SEDDS including particle size, polydispersity,equilibrium solubility, in situ intestine absorption rate and intestinal permeability. Furthermore, the desirability function approach was applied to obtain the optimal formulation for the system.Results: The oil percentage, surfactant percentage and cosurfactant percentage were optimized to be53.6%, 35.7% and 10.7%, respectively, which means the model is available.Conclusions: The D-optimal design is valuable to optimize the SEDDS formulation and understand formulation compositions’ functions on SEDDS properties.展开更多
文摘The pyrolysis of isopsoralen was studied by synchrotron vacuum ultraviolet photoionization mass spectrometry at low pressure. The pyrolysis products were detected at different photon energies, the ratios of products to precursor were measured at various pyrolysis temperatures. The experimental results demonstrate that the main pyrolysis products are primary CO and sequential CO elimination products （C10H602 and C9H60）. The decomposition channels of isopsoralen were also studied by the density functional theory, then rate constants for competing pathways were calculated by the transition state theory. The dominant decom- position channels of isopsoralen and the molecular structures for corresponding products were identified by combined experimental and theoretical studies.
基金This work was financially supported by the National Natural Science Foundation of China (81303218)Doctoral Fund of Ministry of Education of China (20130013120006)Independent project topics of Beijing University of Chinese Medicine (2014-JYBZZ-XS-082).
文摘Near infrared(NIR)assignment of Isopsoralen was performed using deuterated chloroform solvent and two-dimensional correlation spectroscopy(2D-COS)technology.Yunkang Oral Liquid was applied to study Isopsoralen,the characteristic bands by spectral assignment as well as the bands by interval partial least squares(iPLS)and synergy interval partial least squares(siPLS)were used to establish partial least squares(PLS)model.The coefficient of determination in calibration(R^(2)_(cal))were 0.9987,0.9970 and 0.9982.The coefficient of determination in cross validation(R^(2)_(val)) T were 0.9985,0.9921 and 0.9982.The coe±cient of determination in prediction(R^(2)_(pre)) T were 0.9987,0.9955 and 0.9988.The root mean square error of calibration(RMSEC)were 0.27,0.40 and 0.31 ppm.The root mean square error of cross validation(RMSECV)were 0.30,0.67 and 0.32 ppm.The root mean square error of prediction(RMSEP)were 0.23,0.43 and 0.22 ppm.The residual predictive deviation(RPD)were 31.00,16.58 and 32.41.It turned out that the characteristic bands by spectral assignment had the same results with the chemometrics methods in PLS model.It provided guidance for NIR spectral assignment of chemical compositions in Chinese Materia Medica(CMM).
文摘分析补骨脂醇提物(Psoraleae Fructus alcohol extract,PFE)化学成分并探讨其促黑色素生成作用机制。采用超高效液相色谱-四级杆飞行时间质谱(UPLC-Q-TOF-MS)对PFE化学成分进行鉴定;观察PFE对斑马鱼黑色素生成的影响;通过实时荧光定量聚合酶链式反应(quantitative real-time PCR,qRT-PCR)考察PFE、补骨脂素和异补骨脂素对小鼠黑色素瘤细胞B16-F10中酪氨酸酶(tyrosinase,Tyr)、酪氨酸酶相关蛋白1(Tyr-related protein 1,Tyrp1)和相关蛋白2(Tyr-related protein 2,Tyrp2)mRNA表达的影响。结果在PFE中共鉴定47个化学成分,其中黄酮类27个,香豆素类10个,单萜酚类8个和其他类2个;发现PFE作用斑马鱼18 hpf(受精后小时,hours post fertilization)后,能明显增加其体内黑色素水平;qRT-PCR结果显示,与对照组相比,PFE能显著增加Tyr和Tyrp2 mRNA的表达,其他给药组均能不同程度地增加Tyr、Tyrp1和Tyrp2 mRNA的表达。
基金Supported by the Foundation of Fujian Province Health Department Fund(No.2009-1-30)Fujian Provincie Department of Education Issues(No.JA10176)
文摘Objective： To investigate the protective effects of the natural medicinal monomer isopsoralen （ISR） with estrogenic activity against oxidative damage in human lens epithelial cells B3 （HLE-B3） caused by hydrogen peroxide （H2O2） and to pursue the possible mitochondrial proteomic regularity of the protective effects. Methods： HLE-B3 cells were treated with H2O2 （300 μMol/L）, β-estradiol （E2：10^-8mol/L） and H2O2, ISR （10^-5 mol/L） and H2O2, or left untreated. Altered expressions of all mitochondrial proteins were analyzed by protein array and surface- enhanced laser desorpUon ionization time of flight mass spectrometry （SELDI-TOF-MS）. The mass/charge （m/z） ratios of each peak were tested by the Kruskal-Wallis rank sum test, and the protein peak value of the m/z ratio for each treatment by pair comparison was analyzed with the Nemenyi test. Results： H2O2 up-regulated the expressions of two protein spots （with m/z of 6532 and 6809）. E2 mitigated the oxidative damage, and the expression of one protein spot （m/z 6532） was down-regulated. In contrast, ISR down-regulated both of protein spots （m/z 6532 and 6809）. Conclusions： ISR could effectively inhibit H2O2-induced oxidative damage in HLE-B3 cells. The protein spot at m/z of 6532 might be the target spot of ISR against oxidative damage induced by H2O2.
文摘Objective: To optimize a self-emulsifying drug delivery system(SEDDS) formulation for psoralen and isopsoralen(PSO and IPSO) isolated from Psoraleae Fructus.Methods: A D-optimal design was used to investigate the influence of oil percentage, surfactant percentage and cosurfactant percentage on several properties of SEDDS including particle size, polydispersity,equilibrium solubility, in situ intestine absorption rate and intestinal permeability. Furthermore, the desirability function approach was applied to obtain the optimal formulation for the system.Results: The oil percentage, surfactant percentage and cosurfactant percentage were optimized to be53.6%, 35.7% and 10.7%, respectively, which means the model is available.Conclusions: The D-optimal design is valuable to optimize the SEDDS formulation and understand formulation compositions’ functions on SEDDS properties.
