A new neolignan glycoside, 4-O-β-d-glucopyranosyl-9-O-β-d-glucopyranosyl-(7R,8S)-dehydrodiconiferyl alcohol was isolated from the fresh roots of Angelica dahurica. The structure of the new compound was elucidated on...A new neolignan glycoside, 4-O-β-d-glucopyranosyl-9-O-β-d-glucopyranosyl-(7R,8S)-dehydrodiconiferyl alcohol was isolated from the fresh roots of Angelica dahurica. The structure of the new compound was elucidated on the basis of spectral analysis.展开更多
We present a theoretical study of the influence of a single silver sphere on the fluorescence of radix angelica dahurica, which is a kind of traditional Chinese medicine. The enhancement factors of the excitation and ...We present a theoretical study of the influence of a single silver sphere on the fluorescence of radix angelica dahurica, which is a kind of traditional Chinese medicine. The enhancement factors of the excitation and the relaxation processes are deduced. The excitation can be enhanced more than 100 times at 315 nm. The enhancement factor of the emission can reach up to 9 at a center wavelength of 400 nm.展开更多
Angelica dahurica is commonly referred to as ‘Baizhi’ in China and has been noted for its therapeutic significance. The major active ingredients of Angelica dahurica is coumarin, which is reported as a kind of poten...Angelica dahurica is commonly referred to as ‘Baizhi’ in China and has been noted for its therapeutic significance. The major active ingredients of Angelica dahurica is coumarin, which is reported as a kind of potent inhibitor of cytochrome P450 enzymes (CYP450s). The aim of this study was to investigate the inhibition of CYP3A enzymes by total coumarin extract (TCE) obtained from dried root of Angelica dahurica by using in situ single pass intestinal perfusion (SPIP) and in situ liver perfusion in rats. When midazolam (MDZ) which is a substrate of CYP3A co-perfused with TCE (198 μg/mL) from Baizhi in duodenum and ileum segments, the Peff of MDZ has increased significantly compared with the MDZ single perfused group (p 0.05) (n = 6). During in situ liver perfusion study, the results demonstrated that, 3 days oral administration of TCE obtained from Baizhi could significantly reduce the elimination rate of MDZ in the perfusate (p Angelica dahurica extract co-administrated with drugs which are the substrates of CYP3A, much more attention should be paid rather than that of other CYP450 enzymes. These findings may facilitate in predicting possible herb-drug interactions (HDIs) when Angelica dahurica is used in combination with other drugs, and decrease the incidence of the CYP450-mediated HDIs.展开更多
Objective:To study the chemical constituents of the roots of Angelica dahurica,a well-known Chinese herbal medicine named Baizhi in Chinese.Methods:Compounds were separated by various chromatographies,and the structur...Objective:To study the chemical constituents of the roots of Angelica dahurica,a well-known Chinese herbal medicine named Baizhi in Chinese.Methods:Compounds were separated by various chromatographies,and the structures of new compounds were elucidated based on the analysis of their spectroscopic and spectrometric data(1D,2D NMR,HRESI MS,IR,and UV).The absolute configurations of new compounds were determined by the calculated electronic circular dichroism and chemical derivatization.The inhibitory activities of all isolates against nitric oxide(NO)production were evaluated using lipopolysaccharide-activated RAW 264.7macrophage cells.Results:Seven new 3,4-dihydro-furanocoumarin derivatives(1a/1b,2a/2b,3a/3b,4)together with a known furanocoumarin(5)were isolated from the roots of A.dahurica.The new compounds included three pairs of enantiomers,(4S,2’’R)-angelicadin A(1a)/(4R,2’’S)-angelicadin A(1b),(4S,2’’S)-angelicadin A(2a)/(4R,2’’R)-angelicadin A(2b),and(4S,2’’S)-secoangelicadin A(3a)/(4R,2’’R)-secoangelicadin A(3b),together with(4R,2’’R)-secoangelicadin A methyl ester(4).The known xanthotoxol(5)inhibited the NO production with the half-maximal inhibitory concentration(IC50)value of(32.8±0.8)μmol/L,but all the new compounds showed no inhibitory activities at the concentration of100μmol/L.Conclusion:This is the first report of the discovery of 3,4-dihydro-furanocoumarins from A.dahurica.The results are not only meaningful for the understanding of the chemical constituents of A.dahurica,but also enrich the reservoir of natural products.展开更多
Angelica dahurica(A. dahurica) is a traditional Chinese medicinal plant being used in clinical practice. The present study demonstrated that A. dahurica could reduce white-fat weight in high-fat-diet hyperlipidemic mi...Angelica dahurica(A. dahurica) is a traditional Chinese medicinal plant being used in clinical practice. The present study demonstrated that A. dahurica could reduce white-fat weight in high-fat-diet hyperlipidemic mice, decrease total cholesterol and triglyceride concentrations in the livers of both high-fat-diet and Triton WR1339 induced hyperlipidemic mice, and enhance the total hepatic lipase activities of them. These findings were further supported by the results derived from the experiments with Hep G2 cells in vitro. In addition, the proteins related to lipids metabolism were investigated using LC-MS/MS, indicating that genes of lipid metabolism and lipid transport were regulated by A. dhurica. The results from LC-MS/MS were further conformed by Western blot and real time PCR assays. A. dahurica could down-regulate the expression of catalase(CAT) and sterol carrier protein2(SCP2) and up-regulate the expression of lipid metabolism related genes-lipase member C(LIPC) and peroxisome proliferator-activated receptor gamma(PPARγ). In the Triton WR1339 mouse liver and Hep G2 cells in vitro, A. dahurica was able to increase the expression of LIPC and PPARγ, confirming the results from in vivo experiments. Imperatorin showed the same activity as A. dahurica, suggesting it was one of the major active ingredients of the herb. In conclusion, our work represented a first investigation demonstrating that A. dahurica was able to regulate lipid metabolism and could be developed as a novel approach to fighting against fatty liver and obesity.展开更多
Objective： To investigate the chemical constituents from the roots of Angelica dahurica.Methods： The chemical constituents were isolated and purified by AB-8 macroporous adsorption resin and Sephadex LH-20 column as...Objective： To investigate the chemical constituents from the roots of Angelica dahurica.Methods： The chemical constituents were isolated and purified by AB-8 macroporous adsorption resin and Sephadex LH-20 column as well as semi-preparative reversed phase HPLC.The chemical structures were identified by spectral data.Results： Ten compounds were isolated and identified as xanthoarnol-3-O-β-d-glucopyranoside（1）,angedahuricoside A（2）,angedahuricoside B（3）,isofraxidin-7-O-β-d-glucopyranoside（4）,fraxidin-8-O-β-d-glucopyranoside（5）,（-）-marmesinin（6）,（2 S,3 R）-3-hydroxymarmesinin（7）,hyuganoside V（8）,daucosterol（9）,and sucrose（10）.Conclusion： Compounds 1 –3 are new ones and compounds 4 –6 and 8 are obtained from title plant for the first time.展开更多
ECBP21 is an extracellular calmodulin-binding protein which was first detected and purified from extracellular extracts of suspension-cultured cells of Angelica da-hurica. The purified protein was electroblotted onto ...ECBP21 is an extracellular calmodulin-binding protein which was first detected and purified from extracellular extracts of suspension-cultured cells of Angelica da-hurica. The purified protein was electroblotted onto PVDF membrane and the amino acid sequences from 1 to 20 were determined. Using degenerate oligonucleotides of the sequence, a full-length cDNA coding for ECBP21 was isolated by a combination of RT-PCR and 5’-RACE cloning. The cDNA contains 947 nucleotides and codes for a precursor protein of 216 amino acids. The N-terminal 1-25 amino acid sequence is a predicted signal peptide and the other 26-216 amino acid sequence is a mature peptide. The 26-45 amino acid sequence shows identity with the N-terminal amino acid sequence of purified ECBP21 from Angelica dahurica. The fragment of encoding the mature protein was cloned into pET-28b(+) and transformed into E. colt BL21(DE3). A protein with relative molecular mass 21 ku was expressed in E. coli. Using a biotinylated-CaM gel overlay technique,展开更多
文摘A new neolignan glycoside, 4-O-β-d-glucopyranosyl-9-O-β-d-glucopyranosyl-(7R,8S)-dehydrodiconiferyl alcohol was isolated from the fresh roots of Angelica dahurica. The structure of the new compound was elucidated on the basis of spectral analysis.
基金supported by the National Natural Science Foundation of China(Grant Nos.61405085 and 61275147)the Research Fund for the Doctoral Program of Liaocheng University,China+1 种基金the Key Project of Science and Technology of Shandong Province of China(Grant No.2010GGX10127)the Shandong Province Natural Science Foundation of China(Grant Nos.ZR2013EML006 and ZR2012AL11)
文摘We present a theoretical study of the influence of a single silver sphere on the fluorescence of radix angelica dahurica, which is a kind of traditional Chinese medicine. The enhancement factors of the excitation and the relaxation processes are deduced. The excitation can be enhanced more than 100 times at 315 nm. The enhancement factor of the emission can reach up to 9 at a center wavelength of 400 nm.
文摘Angelica dahurica is commonly referred to as ‘Baizhi’ in China and has been noted for its therapeutic significance. The major active ingredients of Angelica dahurica is coumarin, which is reported as a kind of potent inhibitor of cytochrome P450 enzymes (CYP450s). The aim of this study was to investigate the inhibition of CYP3A enzymes by total coumarin extract (TCE) obtained from dried root of Angelica dahurica by using in situ single pass intestinal perfusion (SPIP) and in situ liver perfusion in rats. When midazolam (MDZ) which is a substrate of CYP3A co-perfused with TCE (198 μg/mL) from Baizhi in duodenum and ileum segments, the Peff of MDZ has increased significantly compared with the MDZ single perfused group (p 0.05) (n = 6). During in situ liver perfusion study, the results demonstrated that, 3 days oral administration of TCE obtained from Baizhi could significantly reduce the elimination rate of MDZ in the perfusate (p Angelica dahurica extract co-administrated with drugs which are the substrates of CYP3A, much more attention should be paid rather than that of other CYP450 enzymes. These findings may facilitate in predicting possible herb-drug interactions (HDIs) when Angelica dahurica is used in combination with other drugs, and decrease the incidence of the CYP450-mediated HDIs.
基金financially supported by Beijing Natural Science Foundation(No.7202125)。
文摘Objective:To study the chemical constituents of the roots of Angelica dahurica,a well-known Chinese herbal medicine named Baizhi in Chinese.Methods:Compounds were separated by various chromatographies,and the structures of new compounds were elucidated based on the analysis of their spectroscopic and spectrometric data(1D,2D NMR,HRESI MS,IR,and UV).The absolute configurations of new compounds were determined by the calculated electronic circular dichroism and chemical derivatization.The inhibitory activities of all isolates against nitric oxide(NO)production were evaluated using lipopolysaccharide-activated RAW 264.7macrophage cells.Results:Seven new 3,4-dihydro-furanocoumarin derivatives(1a/1b,2a/2b,3a/3b,4)together with a known furanocoumarin(5)were isolated from the roots of A.dahurica.The new compounds included three pairs of enantiomers,(4S,2’’R)-angelicadin A(1a)/(4R,2’’S)-angelicadin A(1b),(4S,2’’S)-angelicadin A(2a)/(4R,2’’R)-angelicadin A(2b),and(4S,2’’S)-secoangelicadin A(3a)/(4R,2’’R)-secoangelicadin A(3b),together with(4R,2’’R)-secoangelicadin A methyl ester(4).The known xanthotoxol(5)inhibited the NO production with the half-maximal inhibitory concentration(IC50)value of(32.8±0.8)μmol/L,but all the new compounds showed no inhibitory activities at the concentration of100μmol/L.Conclusion:This is the first report of the discovery of 3,4-dihydro-furanocoumarins from A.dahurica.The results are not only meaningful for the understanding of the chemical constituents of A.dahurica,but also enrich the reservoir of natural products.
基金supported in part by National Natural Science Foundation of China(Nos.81473321 and 81374006)the National Key Technology R&D Program of China(No.2012BAI29B02)the National S&T Major Special Project for New Drug R&D Program of China(Nos.2012ZX09102-201-008,2012ZX09103-201-041,and 2011ZX09101-002-11)
文摘Angelica dahurica(A. dahurica) is a traditional Chinese medicinal plant being used in clinical practice. The present study demonstrated that A. dahurica could reduce white-fat weight in high-fat-diet hyperlipidemic mice, decrease total cholesterol and triglyceride concentrations in the livers of both high-fat-diet and Triton WR1339 induced hyperlipidemic mice, and enhance the total hepatic lipase activities of them. These findings were further supported by the results derived from the experiments with Hep G2 cells in vitro. In addition, the proteins related to lipids metabolism were investigated using LC-MS/MS, indicating that genes of lipid metabolism and lipid transport were regulated by A. dhurica. The results from LC-MS/MS were further conformed by Western blot and real time PCR assays. A. dahurica could down-regulate the expression of catalase(CAT) and sterol carrier protein2(SCP2) and up-regulate the expression of lipid metabolism related genes-lipase member C(LIPC) and peroxisome proliferator-activated receptor gamma(PPARγ). In the Triton WR1339 mouse liver and Hep G2 cells in vitro, A. dahurica was able to increase the expression of LIPC and PPARγ, confirming the results from in vivo experiments. Imperatorin showed the same activity as A. dahurica, suggesting it was one of the major active ingredients of the herb. In conclusion, our work represented a first investigation demonstrating that A. dahurica was able to regulate lipid metabolism and could be developed as a novel approach to fighting against fatty liver and obesity.
基金The National Natural Science Foundation of China (81473321)Beijing Municipal Natural Science Foundation (7152086)+1 种基金the National Key Technology R & D Program of China (2011BAI07B082012BAI29B02)
文摘Objective： To investigate the chemical constituents from the roots of Angelica dahurica.Methods： The chemical constituents were isolated and purified by AB-8 macroporous adsorption resin and Sephadex LH-20 column as well as semi-preparative reversed phase HPLC.The chemical structures were identified by spectral data.Results： Ten compounds were isolated and identified as xanthoarnol-3-O-β-d-glucopyranoside（1）,angedahuricoside A（2）,angedahuricoside B（3）,isofraxidin-7-O-β-d-glucopyranoside（4）,fraxidin-8-O-β-d-glucopyranoside（5）,（-）-marmesinin（6）,（2 S,3 R）-3-hydroxymarmesinin（7）,hyuganoside V（8）,daucosterol（9）,and sucrose（10）.Conclusion： Compounds 1 –3 are new ones and compounds 4 –6 and 8 are obtained from title plant for the first time.
基金This work was supported by the National Key Basic Research Special Funds of China (Grant No. G19990117)the National Natural Science Foundation of China (Grant No. 30170476).
文摘ECBP21 is an extracellular calmodulin-binding protein which was first detected and purified from extracellular extracts of suspension-cultured cells of Angelica da-hurica. The purified protein was electroblotted onto PVDF membrane and the amino acid sequences from 1 to 20 were determined. Using degenerate oligonucleotides of the sequence, a full-length cDNA coding for ECBP21 was isolated by a combination of RT-PCR and 5’-RACE cloning. The cDNA contains 947 nucleotides and codes for a precursor protein of 216 amino acids. The N-terminal 1-25 amino acid sequence is a predicted signal peptide and the other 26-216 amino acid sequence is a mature peptide. The 26-45 amino acid sequence shows identity with the N-terminal amino acid sequence of purified ECBP21 from Angelica dahurica. The fragment of encoding the mature protein was cloned into pET-28b(+) and transformed into E. colt BL21(DE3). A protein with relative molecular mass 21 ku was expressed in E. coli. Using a biotinylated-CaM gel overlay technique,
