ABSTRACT
AIM:To do cluster analysis on the herb active ingredients with reversal activity of multi-drug resistance in HL60/HT cells.METHODS:HL60/HT cell was used to check the inhibitory effect of Psoralen,psoralen-A,curcumin,quercetin,psoralidin,isopsoralidin,psoralen phenol,Rhein on cell proliferation by MTT assay.Flow cytometry was used to measure HL fluorescence index and the expression of P-glucose protein.On the basis of the experimental data,herbs were classified as different groups by cluster analysis.RESULTS:Reversion rate,HT concentration and P-gp expression of HL60/HT fell within the range of 6.2 to 12.5,9.6 to 25.6,and 29.3 to 50.1,respectively.CONCLUSION:According to cluster similarity,8 herbal ingredients could be divided into three groups,psoralen,curcumin and quercetin were in the first group.Psoralen-A,psoralidin,isopsoralidin and rhein were in the second group,psoralen phenol was in the third group.
ABSTRACT
Objective To research the reversal effects of psoralen on multidrug resistant action and its influence on intracellular Ca2+ concentration in MCF-7/ADR cells and to explore its possible mechanisms of reversing multidrug resistance (MDR). Methods The inhibitory effects of psoralen on the viability of MCF-7/ADR cells were determined with MTT assay, intracellular adriamycin (ADR) concentration was assayed with HPLC and the intracellular Ca2+ concentrations in different incubative duration were detected with confocal microscope. Results Psoralen from 1 to 20 μmol/L reduced the value of IC50 of ADR in MCF-7/ADR cells, enhanced accumulation of ADR and influenced Ca2+ concentration with a negative correlation in different duration (24 h, 48 h and 96 h). Conclusion Psoralen can reverse MDR in MCF-7/ADR cells and its mechanism may be related to the increase of the intracellular accumulation of ADR by enhancing the intracellular Ca2+ concentration.
ABSTRACT
Objective To research the reversal effects of psoralen on multidrug resistant action and its influence on intracellular Ca2+ concentration in MCF-7/ADR cells and to explore its possible mechanisms of reversing multidrug resistance (MDR). Methods The inhibitory effects of psoralen on the viability of MCF-7/ADR cells were determined with MTT assay, intracellular adriamycin (ADR) concentration was assayed with HPLC and the intracellular Ca2+ concentrations in different incubative duration were detected with confocal microscope. ]Results Psoralen from 1 to 20 ?mol/L reduced the value of IC50 of ADR in MCF-7/ADR cells, enhanced accumulation of ADR and influenced Ca2+ concentration with a negative correlation in different duration (24 h, 48 h and 96 h). Conclusion Psoralen can reverse MDR in MCF-7/ADR cells and its mechanism may be related to the increase of the intracellular accumulation of ADR by enhancing the intracellular Ca2+ concentration.
ABSTRACT
Objective To determine the reversal effect of psoralen on multidrug resistance (MDR) in the harringtonine (HT)-resistant leukemic cell line HL60/HT. Method The modulating effect of psoralen on MDR in HL60 and HL60/HT cells were determined by the measurement of cell growth and viability via MTT assay. High performance liquid chromatography(HPLC) was used to analyze intracellular HT concentrations in HL60/HT and HL60 cells treated with psoralen. Result Psoralen from 1 to 20 ?mol/L could reduce the value of IC_ 50 to HT and enhance the accumulation of HT in HL60/HT cells. Conclusion Psoralen can reverse MDR of HL60/HT cells and is a potential modulator of MDR.
ABSTRACT
Objective To determine the reversal effect of psoralen on multidrug resistance (MDR) in the harringtonine (HT)-resistant leukemic cell line HL60/HT. Method The modulating effect of psoralen on MDR in HL60 and HL60/HT cells were determined by the measurement of cell growth and viability via MTT assay. High performance liquid chromatography(HPLC) was used to analyze intracellular HT concentrations in HL60/HT and HL60 cells treated with psoralen. Result Psoralen from 1 to 20 μmol/L could reduce the value of IC50 to HT and enhance the accumulation of HT in HL60/HT cells. Conclusion Psoralen can reverse MDR of HL60/HT cells and is a potential modulator of MDR.
ABSTRACT
Objective:To study the better extraction method for Qidan decoction.Method:Orthogonal design was used to find befitting conditions.The water quantity,extraction time and frequency were selected as observational conditions.The optimum conditions were repeated three times to study repetition.Results:The optimum extracting procedure is 14 times water, extracting 3 times,the time was 30 min each time.The active ingredient content RSD of three parallel trial is 0.86%.Conclusion: The optimal condition for ultrasonic extraction is 14 times water,extracting 3 times,30 min per time.This method is of good repeatability.
ABSTRACT
AIM:To do cluster analysis on the herb active ingredients with reversal activity of multi-drug resistance in HL60/HT cells.METHODS:HL60/HT cell was used to check the inhibitory effect of Psoralen,psoralen-A,curcumin,quercetin,psoralidin,isopsoralidin,psoralen phenol,Rhein on cell proliferation by MTT assay.Flow cytometry was used to measure HL fluorescence index and the expression of P-glucose protein.On the basis of the experimental data,herbs were classified as different groups by cluster analysis.RESULTS:Reversion rate,HT concentration and P-gp expression of HL60/HT fell within the range of 6.2 to 12.5,9.6 to 25.6,and 29.3 to 50.1,respectively.CONCLUSION:According to cluster similarity,8 herbal ingredients could be divided into three groups,psoralen,curcumin and quercetin were in the first group.Psoralen-A,psoralidin,isopsoralidin and rhein were in the second group,psoralen phenol was in the third group.
ABSTRACT
AIM:To study the rationality and the best dosage of Qidan Decoction (Radix Astragali,Radix et Rhizoma Salviae miltiorrhizae,Fructus Psoraleae,etc.) on inhibiting gastric cancer metastasis. METHODS:The ability of inhibiting gastric cancer metastasis and the activity of NK cell were detected as indexes to appraise the rational and the best dosage. RESULTS:The function of Astragalus membranaceus,Salvia miltiorrhiza.Ege.,psoralea corylifolia and Lycium Barbarum on inhibiting gastric cancer metastasis and rising the activity of NK cell was significant(P