Two new sesquiterpenoids,artemlavanins A(1)and B(3),together with fifteen known compounds(2 and 4−17)were iso-lated from the EtOH extract of Artemisia lavandulaefolia.The structures of new compounds were elucidated by...Two new sesquiterpenoids,artemlavanins A(1)and B(3),together with fifteen known compounds(2 and 4−17)were iso-lated from the EtOH extract of Artemisia lavandulaefolia.The structures of new compounds were elucidated by extensive spectroscopic analyses(HRESIMS,1D and 2D NMR)and ECD calculations.Compound 1 was a sesquiterpenoid lactone possessing a rearranged eudesmane skeleton;compounds 2-5,6-8,9 and 10-12 belonged to the eudesmane,guaiane,oppositane and farnesane sesquiterpenoids,respectively;compounds 13-17 were the phenyl derivatives with a 4-hydroxy-acetophenone moiety.Twelve compounds(1-3,5-7,10-12,14,15 and 17)displayed cytotoxicity against hepatic stellate cell line LX2(HSC-LX2)with IC50 values ranging from 35.1 to 370.3μM.Compounds 2,7,10-12 and 17 exhibited the stronger cytotoxicity than silybin(IC50,169.6μM)with IC50 values of 82.1,35.1,95.0,83.8,81.6 and 90.1μM.Compound 7 as the most active one showed significant inhibition on the deposition of human collagen type I(Col I),human hyaluronic acid(HA)and human laminin(HL)with IC50 values of 10.7,24.5 and 13.3μM.展开更多
BACKGROUND： The oncogenesis of hepatocellular carcinoma（HCC） is not clear. The current methods of the pertinent studies are not precise and sensitive. The present study was to use liver cancer cell line to explore ...BACKGROUND： The oncogenesis of hepatocellular carcinoma（HCC） is not clear. The current methods of the pertinent studies are not precise and sensitive. The present study was to use liver cancer cell line to explore the bio-compatibility and cytotoxicity of ternary quantum dots（QDs） probe and to evaluate the possible application of QDs in HCC.METHODS： CuInS_2-ZnS-AFP fluorescence probe was designed and synthesized to label the liver cancer cell HepG 2. The cytotoxicity of CuInS_2-ZnS-AFP probe was evaluated by MTT experiments and flow cytometry. RESULTS： The labeling experiments indicated that CuInS_2-ZnS QDs conjugated with AFP antibody could enter HepG 2 cells effectively and emit intensive yellow fluorescence by ultraviolet excitation without changing cellular morphology. Toxicity tests suggested that the cytotoxicity of CuInS_2-ZnS-AFP probe was significantly lower than that of CdT e-ZnS-AFP probe（t test, F=0.8, T=-69.326, P〈0.001）. For CuInS_2-ZnS-AFP probe, timeeffect relationship was presented in intermediate concentration（〉20%） groups（P〈0.05） and dose-effect relationship was presented in almost all of the groups（P〈0.05）. CONCLUSION： CuInS_2-ZnS-AFP QDs probe had better biocompatibility and lower cytotoxicity compared with CdT e-ZnS-AFP probe, and could be used for imaging the living cells in vitro.展开更多
Four new sesquiterpenoids,artemyrianins A-D(1-4),and three new norlignans,artemyrianins E-G(5-7),together with five known compounds(8-12),were isolated from the aerial parts of Artemisia myriantha(Asteraceae).The new ...Four new sesquiterpenoids,artemyrianins A-D(1-4),and three new norlignans,artemyrianins E-G(5-7),together with five known compounds(8-12),were isolated from the aerial parts of Artemisia myriantha(Asteraceae).The new compounds were established by spectroscopic data analyses(HRMS,IR,1D and 2D NMR),and their absolute configurations were confirmed by the single-crystal X-ray diffraction or ECD calculations.The isolates showed cytotoxicity against HepG2 cells with IC50 values ranging from 33.3 to 145.2μM.展开更多
基金supported by the Yunnan Wanren Project(YNWR-KJLJ-2019-002)the Program of Yunling Scholarship,the Reserve Talents of Young and Middle-aged Academic and Technical Leaders in Yunnan Province,and the Youth Innovation Promotion Association,CAS(2013252).
文摘Two new sesquiterpenoids,artemlavanins A(1)and B(3),together with fifteen known compounds(2 and 4−17)were iso-lated from the EtOH extract of Artemisia lavandulaefolia.The structures of new compounds were elucidated by extensive spectroscopic analyses(HRESIMS,1D and 2D NMR)and ECD calculations.Compound 1 was a sesquiterpenoid lactone possessing a rearranged eudesmane skeleton;compounds 2-5,6-8,9 and 10-12 belonged to the eudesmane,guaiane,oppositane and farnesane sesquiterpenoids,respectively;compounds 13-17 were the phenyl derivatives with a 4-hydroxy-acetophenone moiety.Twelve compounds(1-3,5-7,10-12,14,15 and 17)displayed cytotoxicity against hepatic stellate cell line LX2(HSC-LX2)with IC50 values ranging from 35.1 to 370.3μM.Compounds 2,7,10-12 and 17 exhibited the stronger cytotoxicity than silybin(IC50,169.6μM)with IC50 values of 82.1,35.1,95.0,83.8,81.6 and 90.1μM.Compound 7 as the most active one showed significant inhibition on the deposition of human collagen type I(Col I),human hyaluronic acid(HA)and human laminin(HL)with IC50 values of 10.7,24.5 and 13.3μM.
基金supported by grants from the Nation al Natural Science Foundation of China(51272246 and 81172082)
文摘BACKGROUND： The oncogenesis of hepatocellular carcinoma（HCC） is not clear. The current methods of the pertinent studies are not precise and sensitive. The present study was to use liver cancer cell line to explore the bio-compatibility and cytotoxicity of ternary quantum dots（QDs） probe and to evaluate the possible application of QDs in HCC.METHODS： CuInS_2-ZnS-AFP fluorescence probe was designed and synthesized to label the liver cancer cell HepG 2. The cytotoxicity of CuInS_2-ZnS-AFP probe was evaluated by MTT experiments and flow cytometry. RESULTS： The labeling experiments indicated that CuInS_2-ZnS QDs conjugated with AFP antibody could enter HepG 2 cells effectively and emit intensive yellow fluorescence by ultraviolet excitation without changing cellular morphology. Toxicity tests suggested that the cytotoxicity of CuInS_2-ZnS-AFP probe was significantly lower than that of CdT e-ZnS-AFP probe（t test, F=0.8, T=-69.326, P〈0.001）. For CuInS_2-ZnS-AFP probe, timeeffect relationship was presented in intermediate concentration（〉20%） groups（P〈0.05） and dose-effect relationship was presented in almost all of the groups（P〈0.05）. CONCLUSION： CuInS_2-ZnS-AFP QDs probe had better biocompatibility and lower cytotoxicity compared with CdT e-ZnS-AFP probe, and could be used for imaging the living cells in vitro.
基金supported by the Yunnan Wanren Project(YNWR-KJLJ-2019-002)the Program of Yunling Scholarship,the Reserve Talents of Young and Middle-aged Academic and Technical Leaders in Yunnan Province,and the Youth Innovation Promotion Association,CAS(2013252).
文摘Four new sesquiterpenoids,artemyrianins A-D(1-4),and three new norlignans,artemyrianins E-G(5-7),together with five known compounds(8-12),were isolated from the aerial parts of Artemisia myriantha(Asteraceae).The new compounds were established by spectroscopic data analyses(HRMS,IR,1D and 2D NMR),and their absolute configurations were confirmed by the single-crystal X-ray diffraction or ECD calculations.The isolates showed cytotoxicity against HepG2 cells with IC50 values ranging from 33.3 to 145.2μM.
