ABSTRACT
OBJECTIVE: To study the effects of different processing on taxifolin and quercetin in Fructus Polygoni Orientalis. METHODS: The analysis was performed on a Agilent column (4. 6 mm x 150 mm, 5 microm) eluted with a gradient elution of methanol-water containing 0. 1% phosphoric acid. The flow rate was 1 mL/min, the detection wave length was 270 nm and the column temperature was set at 25 degrees C. The content changes of taxifolin and quercetin processed by different methods was compared. RESULTS: The contents of active ingredients in Fructus Polygoni Orientalis that processed by the method of therm-high pressure (the pressure was 14Pa) was obvious higher than those of other methods. CONCLUSION: Active ingredients of Fructus Polygoni Orientalis may be promoted by therm-high pressure processed. There is significant difference for the major components by different processing methods. The method of therm-high pressure to processing is used for the first time in the Fruit Polygoni Orientalis. The method appears to be simple, easy and can be used as quantitative determination method for quality control of the Fructus Polygoni Orientalis.
Subject(s)
Drugs, Chinese Herbal/chemistry , Polygonaceae/chemistry , Quercetin/analogs & derivatives , Quercetin/analysis , Technology, Pharmaceutical/methods , Chromatography, High Pressure Liquid/methods , Drugs, Chinese Herbal/isolation & purification , Fruit/chemistry , Hot Temperature , Plants, Medicinal/chemistry , Pressure , Quality Control , Reproducibility of ResultsABSTRACT
Aim The protective effect and mechanism of TPG on PC12 cells in calcium overloading injury models were studied. Methods Two injury models induced by KCl and NMDA were used to assay the action of TPG in cultured PC12 cells. Results The morphological examination revealed that TPG possessed obvious protective effects on PC12 cells in injury models. MTT and LDH measurement indicated that TPG increased the number of live cells and reduced the extent of cell injury significantly. TPG also lessened the concentration of calcium ion in cytoplasm. Conclusion TPG protected rat PC12 cells against two calcium overloading injuries effectively in vitro. Its actions may deal with anti oxidation, inhibition of NO production and blocking of both types of calcium channel.