A rapid and accurate ultra-high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry(UPLC-MS/MS)method was established and validated for the measurement of two forms of cardamonin,i.e.,fr...A rapid and accurate ultra-high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry(UPLC-MS/MS)method was established and validated for the measurement of two forms of cardamonin,i.e.,free and glucuronidated,in the plasma and bile of rats.Cardamonin and an internal standard(1,8-dihydroxyanthraquinone)were extracted from plasma and bile with ethyl ether via liquid-liquid extraction.The analytes in the extracts were separated by an Agilent Zorbax Stable Bond-C18 column(2.1 mm×50 mm,1.8μm)under isocratic elution conditions[acetonitrile(A)and 0.1%ammonium formate in water(B),40:60(volume ratio)]with a flow rate of 0.4 mL/min,and mass spectrometry in negative ion MRM mode was implemented for analysis.Good linearity over the wide ranges of 0.01–5μg/mL for plasma and 0.025–10μg/mL for bile samples was acquired.Method validation was performed according to the FDA guidelines for bioanalytical methods.展开更多
目的建立液相色谱-串联质谱联用法测定人血浆中染料木素（雌激素类药物）及其葡萄糖醛酸代谢物（GGS）并研究其在健康人体中的药代动力学。方法10例健康受试者空腹口服染料木素50mg，血浆加入内标物地塞米松后，经液-液萃取，色谱柱为Ca...目的建立液相色谱-串联质谱联用法测定人血浆中染料木素（雌激素类药物）及其葡萄糖醛酸代谢物（GGS）并研究其在健康人体中的药代动力学。方法10例健康受试者空腹口服染料木素50mg，血浆加入内标物地塞米松后，经液-液萃取，色谱柱为Capcell Pak C8（2mm×150mm，5μm），流动相为：甲醇-5mmol·L^-1乙酸铵-乙腈（70：20：10），以ESI源正离子MRM模式测定染料木素的血药浓度，GGS先酶解为原形后间接测定，用DAS2．0程序计算药代动力学参数。结果线性范围为0．3～500．0μg·L^-1（1=0．9983），回收率在92．9％～104．9％，绝对回收率在74．2％～89．2％，13内、13间变异（RSD）均〈15％。染料木素和GGS的主要药代动力学参数：tmax分别为（5．0±I．3），（6．0±2．4）h，Cmax分别为（10．1±6．3），（218．7±68．6）μg·L^-1，AUC0-1分别为（31．2±10．3），（3344．0±1635．0）μg·h·L^-1，AUC0-∞分别为（33．9±11．4），（3703．0±2031．0）μg·h·L^-1。结论测定方法灵敏、准确、快速、特异性强，适用于染料木素药代动力学研究。展开更多
AIM: To clone the cDNA of UGT1A9 from a Chinese human liver and establish the Chinese hamster lung (CHL) cell line expressing human UGT1A9. METHODS: cDNA of UGT1 A9 was transcripted from mRNA by reverse transcriptase-...AIM: To clone the cDNA of UGT1A9 from a Chinese human liver and establish the Chinese hamster lung (CHL) cell line expressing human UGT1A9. METHODS: cDNA of UGT1 A9 was transcripted from mRNA by reverse transcriptase-ploymerase chain reaction, and was cloned into the pGEM-T vector which was amplified in the host bacteric E.Coli DH5(alpha). The inserted fragment, verified by DNA sequencing, was subcloned into the Hind III /Not I site of a mammalian expression vector pREP9 to construct the plasmid termed pREP9-UGT1A9. CHL cells were transfected with the resultant recombinants, pREP9-UGT1A9, and selected by G418 (400 mg x L(-1)) for one month. The surviving clone (CHL-UGT1A9) was harvested as a pool and sub-cultured in medium containing G418 to obtain samples forUGT1A9 assays. The enzyme activity of CHL-UGT1A9 towards propranolol in S9 protein of the cell was determined by HPLC. RESULTS: The sequence of the cDNA segment cloned, which was 1666 bp in length, was identical to that released by Gene Bank (GenBank accession number: AF056188) in coding region. The recombinant constructed, pREP9-UGT1A9, contains the entire coding region, along with 18 bp of the 5' and 55 bp of the 3' untranslated region of theUGT1A9 cDNA, respectively. The cell lines established expressed the protein of UGT1A9, and the enzyme activity towards propranolol in S9 protein was found to be 101+/- 24 pmol x min(-1) x mg(-1) protein (n=3), but was not detectable in parental CHL cells. CONCLUSION: The cDNA of UGT1A9 was successfully cloned from a Chinese human liver and transfected into CHL cells. The CHL-UGT1 A9 cell lines established efficiently expressed the protein ofUGT1A9 for the further enzyme study of drug glucuronidation.展开更多
A new andrographolide metabolite 1 was isolated from human urine samples after oral administration. The structure was determined to be 3-carbonylandrographolide-19-O-β-D-glu- curonide on the basis of chemical evidenc...A new andrographolide metabolite 1 was isolated from human urine samples after oral administration. The structure was determined to be 3-carbonylandrographolide-19-O-β-D-glu- curonide on the basis of chemical evidences and spectral analysis, especially by 2D-NMR techni- ques.展开更多
文摘A rapid and accurate ultra-high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry(UPLC-MS/MS)method was established and validated for the measurement of two forms of cardamonin,i.e.,free and glucuronidated,in the plasma and bile of rats.Cardamonin and an internal standard(1,8-dihydroxyanthraquinone)were extracted from plasma and bile with ethyl ether via liquid-liquid extraction.The analytes in the extracts were separated by an Agilent Zorbax Stable Bond-C18 column(2.1 mm×50 mm,1.8μm)under isocratic elution conditions[acetonitrile(A)and 0.1%ammonium formate in water(B),40:60(volume ratio)]with a flow rate of 0.4 mL/min,and mass spectrometry in negative ion MRM mode was implemented for analysis.Good linearity over the wide ranges of 0.01–5μg/mL for plasma and 0.025–10μg/mL for bile samples was acquired.Method validation was performed according to the FDA guidelines for bioanalytical methods.
文摘目的建立液相色谱-串联质谱联用法测定人血浆中染料木素（雌激素类药物）及其葡萄糖醛酸代谢物（GGS）并研究其在健康人体中的药代动力学。方法10例健康受试者空腹口服染料木素50mg，血浆加入内标物地塞米松后，经液-液萃取，色谱柱为Capcell Pak C8（2mm×150mm，5μm），流动相为：甲醇-5mmol·L^-1乙酸铵-乙腈（70：20：10），以ESI源正离子MRM模式测定染料木素的血药浓度，GGS先酶解为原形后间接测定，用DAS2．0程序计算药代动力学参数。结果线性范围为0．3～500．0μg·L^-1（1=0．9983），回收率在92．9％～104．9％，绝对回收率在74．2％～89．2％，13内、13间变异（RSD）均〈15％。染料木素和GGS的主要药代动力学参数：tmax分别为（5．0±I．3），（6．0±2．4）h，Cmax分别为（10．1±6．3），（218．7±68．6）μg·L^-1，AUC0-1分别为（31．2±10．3），（3344．0±1635．0）μg·h·L^-1，AUC0-∞分别为（33．9±11．4），（3703．0±2031．0）μg·h·L^-1。结论测定方法灵敏、准确、快速、特异性强，适用于染料木素药代动力学研究。
基金Supported by the National Natural Science Foundation of China(C39370805)Zhejiang Provincial Natural Science Foundation(300487)the Excellent Youth Scientist Fund of Zhejiang Province
文摘AIM: To clone the cDNA of UGT1A9 from a Chinese human liver and establish the Chinese hamster lung (CHL) cell line expressing human UGT1A9. METHODS: cDNA of UGT1 A9 was transcripted from mRNA by reverse transcriptase-ploymerase chain reaction, and was cloned into the pGEM-T vector which was amplified in the host bacteric E.Coli DH5(alpha). The inserted fragment, verified by DNA sequencing, was subcloned into the Hind III /Not I site of a mammalian expression vector pREP9 to construct the plasmid termed pREP9-UGT1A9. CHL cells were transfected with the resultant recombinants, pREP9-UGT1A9, and selected by G418 (400 mg x L(-1)) for one month. The surviving clone (CHL-UGT1A9) was harvested as a pool and sub-cultured in medium containing G418 to obtain samples forUGT1A9 assays. The enzyme activity of CHL-UGT1A9 towards propranolol in S9 protein of the cell was determined by HPLC. RESULTS: The sequence of the cDNA segment cloned, which was 1666 bp in length, was identical to that released by Gene Bank (GenBank accession number: AF056188) in coding region. The recombinant constructed, pREP9-UGT1A9, contains the entire coding region, along with 18 bp of the 5' and 55 bp of the 3' untranslated region of theUGT1A9 cDNA, respectively. The cell lines established expressed the protein of UGT1A9, and the enzyme activity towards propranolol in S9 protein was found to be 101+/- 24 pmol x min(-1) x mg(-1) protein (n=3), but was not detectable in parental CHL cells. CONCLUSION: The cDNA of UGT1A9 was successfully cloned from a Chinese human liver and transfected into CHL cells. The CHL-UGT1 A9 cell lines established efficiently expressed the protein ofUGT1A9 for the further enzyme study of drug glucuronidation.
文摘A new andrographolide metabolite 1 was isolated from human urine samples after oral administration. The structure was determined to be 3-carbonylandrographolide-19-O-β-D-glu- curonide on the basis of chemical evidences and spectral analysis, especially by 2D-NMR techni- ques.
