RESUMO
Periploca forrestii, a traditional medicine commonly used by Miao people, is one of the "three treasures of Miao medicine", which mainly contains various components such as cardiac glycosides, flavonoids, ceramides, terpenoids, phenylpropanoid and volatile oils. It has significant pharmacological effects including cardiotonic, anti-inflammatory, antioxidant, pain-suppressing, and antibacterial activities, and is used to treat rheumatoid arthritis, bruises, stomach pain, dyspepsia, amenorrhea, and dysentery. Relevant domestic and abroad literatures were summarized, and a comprehensive review of the chemical constituents, pharmacological effects, clinical application, quality control and spectrum-effect relationship of Periploca forrestii was conducted, to provide evidences for further investigation of Periploca forrestii Schltr.
RESUMO
Objective: To extract and purify total flavonoids from Periploca forrestii Schltr.(P. forrestii),and test the in vitro inhibitory activity of the total flavonoids and two flvaonoidal compounds in P. forrestii,so as to provide a reference for studies on the related medicinal substances in P. forrestii. Methods: Total flavonoids were extracted from P. forrestii and then purified by the column chromatography on macroporous resin and polyamide columns. The content of total flavonoids was determined according to the Lambert-Beer’s law. The in vitro xanthine oxidase(XOD)inhibitory ac- tivity was assayed for total flavonoids and the two flavonoidal compounds by the ultraviolet spectrophotometry. Results The purified total flavonoids had a content of more than 95%. The total flavonoids and two flavonoidal compounds all showed an inhibitory effect on XOD in vitro,with the inhibitory rate enhanced with increasing concentration. The IC50 of the total flavonoids as well as the two flavonoidal compounds,quercetin-3-O-α-L-pyranoside(QP)and quercetin-7-O-β- D-glucopyranoside(QG)were 608.9,221.2 and 261.2 μg/ml,respectively. Conclusion: The total flavonoids as well as the two flvaonoidal compounds QP and QG in P. forrestii all showed the in vitro inhibitory activity on XOD.