Neuroprotective and anti-oxidant effects of caffeic acid isolated from Erigeron annuus leaf

Chinese Medicine - 2011
Chang‐Ho Jeong1, Hee Rok Jeong2, Gi Jun Choi2, Dae‐Ok Kim1, Uk Lee3, Ho Jin Heo2
1Department of Food Science and Biotechnology, Institute of Life Sciences and Resources, Kyung Hee University, Yongin, 446-701, Korea
2Department of Food Science and Technology, Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, 660-701, Korea
3Department Special Purpose Trees, Korea Forest Research Institute, Suwon, 441-847, Korea

Tóm tắt

Abstract Background

Since oxidative stress has been implicated in a neurodegenerative disease such as Alzheimer's disease (AD), natural antioxidants are promising candidates of chemopreventive agents. This study examines antioxidant and neuronal cell protective effects of various fractions of the methanolic extract of Erigeron annuus leaf and identifies active compounds of the extract.

 Methods

Antioxidant activities of the fractions from Erigeron annuus leaf were examined with [2,2-azino-bis(3-ethylbenz thiazoline-6-sulfonic acid diammonium salt)] (ABTS) and ferric reducing antioxidant power (FRAP) assays. Neuroprotective effect of caffeic acid under oxidative stress induced by H2O2 was investigated with [3-(4,5-dimethythiazol-2-yl)-2,5-diphenyl tetrazolium bromide] (MTT) and lactate dehydrogenase (LDH) assays.

 Results

This study demonstrated that butanol fraction had the highest antioxidant activity among all solvent fractions from methanolic extract E. annuus leaf. Butanol fraction had the highest total phenolic contents (396.49 mg of GAE/g). Caffeic acid, an isolated active compound from butanol fraction, showed dose-dependent in vitro antioxidant activity. Moreover, neuronal cell protection against oxidative stress induced cytotoxicity was also demonstrated.

 Conclusion

Erigeron annuus leaf extracts containing caffeic acid as an active compound have antioxidative and neuroprotective effects on neuronal cells.

Từ khóa


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