ROYAL MONACO RIVIERA WEB MAGAZINE
Luigi Mattera is a certified by CERFPA (St. Laurent du Var-France) HOMEOPATHY & ZUO TUINA MASSAGE OF TRADITIONAL CHINESE MEDICINE
- Hin Wing Yeung, International Society for Chinese Medicine
Society AffiliationsChinese Medicine is the official journal of the International Society for Chinese Medicine.
Neuroprotective and anti-oxidant effects of caffeic acid isolated from Erigeron annuus leaf
Chinese Medicine 2011, 6:25 doi:10.1186/1749-8546-6-25
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.
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.
This study demonstrated that butanol fraction had the highest antioxidant activity among all solvent fractions from methanolic extract Erigeron annuus leaf. Butanol fraction had the highest total phenolic contents (396.49mg 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.
Erigeron annuus leaf extracts containing caffeic acid as an active compound have antioxidative and neuroprotective effects on neuronal cells.