Antioxidant Effect of Selaginella Medicinal Plants and Its Quality Review
赵平, 徐健, 李娟
教育部中药资源与中药复方重点实验室、湖北中医药大学药学院,武汉 430065
ZHAO Ping,, XU Jian, LI Juan,
Key Laboratory of Ministry of Education and Provincial Government for Resource and Compound Prescription of Traditional Chinese Medicine, Hubei University of Chinese Medicine , Wuhan 430065, China
This paper aimed to introduce and review the antioxidant and material base of selaginella medicinal plants. On the basis of the systematic identification of selaginella medicinal plants, we found that the ethyl acetate extract and flavonoids could inhibit the activity of XOD, LOX or/and COX-2 to some extent. Fourteen biflavonoids, one flavonoid and five flavonoid glycosides have been isolated from three resource plants, among them five compounds were firstly reported and fifteen compounds were firstly isolated in selaginella plants. Amentoflavone (AME), robustaflavone and robustaflavone-4'-dimethylether are three common characteristic constituents of selaginella plants, which can act as marks of common active ingredients and be applied to evaluate the quality of selaginella. Further studies found that some plants had stronger anti-Coxsackie virus and anti-tumor effects, and their mechanisms were associated with inhibiting multiple oxidase and mitigating harm of free radicals due to whole function.
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Background: Selaginella species are resurrection plants, which are known, possess various molecular bioactivities depending on species, but only a few species have been detailed observe in the advanced research. Objective: The objective of the following study is to compare the chemical profiles of different species of Selaginella and to investigate cytotoxicity and induction of apoptosis activities of some species of Selaginella. Materials and Methods: The high-performance liquid chromatography (HPLC) method was developed for chemical analysis. Ethyl acetate, ethanol and water-soluble extracts from seven Selaginella species were submitted to 3-(4,5-dimenthyl thizol-2-yl)-2,5-diphenyl tetrazolium bromide assay, flow cytometry, deoxyribonucleic acid (DNA) laddering analysis and caspase-3 expression using Bel-7402, HT-29 and HeLa cells. Results: The HPLC analysis revealed two major common peaks, which were identified as amentoflavone and robustaflavone and another three main peaks in their chromatograms. The results showed that S. labordei, Selaginella tamariscina and Selaginella uncinata had relatively stronger activities on Bel-7402 and HeLa cells and Selaginella moellendorfii had moderate antiproliferation activities, but Selaginella remotifolia and Selaginella pulvinata had almost no inhibitory activities. The main active components were in the ethyl acetate extracts which had abundant biflavonoids. The effects of these extracts on cell proliferation and apoptosis in different cells were not the same, they were more apparent on HeLa cells than on HT-29 cells. The assay of DNA laddering analysis and caspase-3 expression further confirmed that inducing cell apoptosis was one of antitumor mechanisms and antitumor activities of Selaginella species were related to apoptosis induced by caspase family. Conclusion: S. labordei, S. tamariscina and S. uncinata would be potential antitumor agents.
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