Antioxidant activities and phytochemical study of leaf extracts from 18 indigenous tree species in Taiwan

Shang Tse Ho, Yu Tang Tung, Yong Long Chen, Ying Ying Zhao, Min Jay Chung, Jyh Horng Wu

研究成果: 雜誌貢獻文章

13 引文 斯高帕斯(Scopus)

摘要

The objective of this study is to assess antioxidant activities of methanolic extracts from the leaves of 18 indigenous tree species in Taiwan. Results revealed that, among 18 species, Acer oliverianum exhibited the best free radical scavenging activities. The IC50 values were 5.8 and 11.8μg/mL on DPPH radical and superoxide radical scavenging activities, respectively. In addition, A. oliverianum also exhibited the strongest ferrous ion chelating activity. Based on a bioactivity-guided isolation principle, the resulting methanolic crude extracts of A. oliverianum leaves were fractionated to yield soluble fractions of hexane, EtOAc, BuOH, and water. Of these, the EtOAc fraction had the best antioxidant activity. Furthermore, 8 specific phytochemicals were isolated and identified from the EtOAc fraction. Among them, 1,2,3,4,6-O-penta-galloyl-β-D-glucopyranose had the best free radical scavenging activity. These results demonstrate that methanolic extracts and their derived phytochemicals of A. oliverianum leaves have excellent antioxidant activities and thus they have great potential as sources for natural health products.
原文英語
文章編號215959
期刊Evidence-based Complementary and Alternative Medicine
2012
DOIs
出版狀態已發佈 - 2012
對外發佈Yes

    指紋

ASJC Scopus subject areas

  • Complementary and alternative medicine

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