BACKGROUND Colon cancer remains a leading cause of death globally.Pomolic acid(PA)can be separated from the ethyl acetate fraction of achyrocline satureioides.AIM To determine the effects of PA and its glucopyranose e...BACKGROUND Colon cancer remains a leading cause of death globally.Pomolic acid(PA)can be separated from the ethyl acetate fraction of achyrocline satureioides.AIM To determine the effects of PA and its glucopyranose ester,pomolic acid-28-O-β-D-glucopyranosyl ester(PAO),on colon cancer HT-29 cells.METHODS 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay was used to measure cell viability.Apoptosis was detected via hoechst 33342 staining.PI single staining was identified by flow cytometry to determine the cycle and scratch assay was used to observe the migration of HT-29 cells.The levels of mRNA and proteins were evaluated by q polymerase chain reaction and western blotting,respectively.RESULTS PA and PAO considerably inhibited the growth of the HT-29 cell line in a time and dose-dependent manner.After the administration of PA and PAO for 24 and 48 h,cell apoptosis was significantly promoted and HT-29 cells were arrested in the G0/G1 stage.The Bax/Bcl2 ratio was also increased,which activated cysteinyl aspartate specific proteinase 3,leading to apoptosis;it also increased the expression of light chain 3 II/I and Beclin1,which activated autophagy and caused cell death.This in turn increased the expression of p62 to promote cell apoptosis,inhibiting the levels of signal transducer and activator of transcription 3(STAT3)and p-STAT3,suppressing the level of Bcl2,and promoting cell.CONCLUSION Both PA and PAO provide novel therapeutic strategies for treating colorectal cancer.展开更多
A new triterpene and a saponin, named 2α,3β23-trihydroxyurs-20-en-28-oic acid (1) and 2α,3β,23-trihydroxyurs-20-en-28-oic acid O-α-L-rhanmopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-O-β-D-glucopyranosyl...A new triterpene and a saponin, named 2α,3β23-trihydroxyurs-20-en-28-oic acid (1) and 2α,3β,23-trihydroxyurs-20-en-28-oic acid O-α-L-rhanmopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-O-β-D-glucopyranosyl ester (2), have been isolated from the aerial part of CenteUa asiatica. Their structures were elucidated by spectral methods, including 2D-NMR spectra.展开更多
AIM: To investigate the chemical constituents of Fitex negundo. METHOD: Compounds were isolated by different chromatographic methods and their structures were elucidated on the basis of NMR spectroscopy. RESULTS: F...AIM: To investigate the chemical constituents of Fitex negundo. METHOD: Compounds were isolated by different chromatographic methods and their structures were elucidated on the basis of NMR spectroscopy. RESULTS: Four compounds were isolated and identified as 2a, 3a, 24-trihydroxyurs-12, 20(30)-dien-28-oic acid-28-O- β-D-glucopyranosyl ester (1), corosolic acid (2), vulgarsaponin A (3) and 2a, 3a, 24-trihydroxyurs-12-en-28-oic acid-28-O-β-D- glucopyranosyl ester (4), respectively. CONCLUSION: Compound I is a new triterpenoid glycoside.展开更多
文摘BACKGROUND Colon cancer remains a leading cause of death globally.Pomolic acid(PA)can be separated from the ethyl acetate fraction of achyrocline satureioides.AIM To determine the effects of PA and its glucopyranose ester,pomolic acid-28-O-β-D-glucopyranosyl ester(PAO),on colon cancer HT-29 cells.METHODS 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay was used to measure cell viability.Apoptosis was detected via hoechst 33342 staining.PI single staining was identified by flow cytometry to determine the cycle and scratch assay was used to observe the migration of HT-29 cells.The levels of mRNA and proteins were evaluated by q polymerase chain reaction and western blotting,respectively.RESULTS PA and PAO considerably inhibited the growth of the HT-29 cell line in a time and dose-dependent manner.After the administration of PA and PAO for 24 and 48 h,cell apoptosis was significantly promoted and HT-29 cells were arrested in the G0/G1 stage.The Bax/Bcl2 ratio was also increased,which activated cysteinyl aspartate specific proteinase 3,leading to apoptosis;it also increased the expression of light chain 3 II/I and Beclin1,which activated autophagy and caused cell death.This in turn increased the expression of p62 to promote cell apoptosis,inhibiting the levels of signal transducer and activator of transcription 3(STAT3)and p-STAT3,suppressing the level of Bcl2,and promoting cell.CONCLUSION Both PA and PAO provide novel therapeutic strategies for treating colorectal cancer.
文摘A new triterpene and a saponin, named 2α,3β23-trihydroxyurs-20-en-28-oic acid (1) and 2α,3β,23-trihydroxyurs-20-en-28-oic acid O-α-L-rhanmopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-O-β-D-glucopyranosyl ester (2), have been isolated from the aerial part of CenteUa asiatica. Their structures were elucidated by spectral methods, including 2D-NMR spectra.
基金supported by the Program for Changjiang Scholars and Innovative Research Team in the University(No.IRT0965)the Team Project of Natural Science Foundation of Guangdong Province(No.8351063201000003)the Science and Technology Planning Project of Guangdong Province(No.2012A080204005)
文摘AIM: To investigate the chemical constituents of Fitex negundo. METHOD: Compounds were isolated by different chromatographic methods and their structures were elucidated on the basis of NMR spectroscopy. RESULTS: Four compounds were isolated and identified as 2a, 3a, 24-trihydroxyurs-12, 20(30)-dien-28-oic acid-28-O- β-D-glucopyranosyl ester (1), corosolic acid (2), vulgarsaponin A (3) and 2a, 3a, 24-trihydroxyurs-12-en-28-oic acid-28-O-β-D- glucopyranosyl ester (4), respectively. CONCLUSION: Compound I is a new triterpenoid glycoside.