title: The Neuro-Protective Effect of the Methanolic Extract of Perilla frutescens var. japonicaand Rosmarinic Acid against H₂O₂-Induced Oxidative Stress in C6 Glial Cells.
abstract: Neurodegenerative diseases are often associated with oxidative damage in neuronal cells. This study was conducted to investigate the neuro-protective effect of methanolic (MeOH) extract of Perilla frutescens var. japonica and its one of the major compounds, rosmarinic acid, under oxidative stress induced by hydrogen peroxide (H₂O₂) in C6 glial cells. Exposure of C6 glial cells to H₂O₂ enhanced oxidative damage as measured by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and thiobarbituric acid-reactive substance assays. The MeOH extract and rosmarinic acid prevented oxidative stress by increasing cell viability and inhibiting cellular lipid peroxidation. In addition, the MeOH extract and rosmarinic acid reduced H₂O₂-induced expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) at the transcriptional level. Moreover, iNOS and COX-2 protein expression was down-regulated in H₂O₂-indcued C6 glial cells treated with the MeOH extract and rosmarinic acid. These findings suggest that P. frutescens var. japonica and rosmarinic acid could prevent the progression of neurodegenerative diseases through attenuation of neuronal oxidative stress.
authors.affiliation: Department of Food Science and Nutrition & Kimchi Research Institute, Pusan National University, Busan 46241, Republic of Korea.
authors.forename: Ah Young
authors.initials: AY
authors.lastname: Lee
authors.affiliation: Department of Food Science and Nutrition & Kimchi Research Institute, Pusan National University, Busan 46241, Republic of Korea.
authors.forename: Ting Ting
authors.initials: TT
authors.lastname: Wu
authors.affiliation: Department of Food Science and Nutrition & Kimchi Research Institute, Pusan National University, Busan 46241, Republic of Korea.
authors.forename: Bo Ra
authors.initials: BR
authors.lastname: Hwang
authors.affiliation: Department of Integrative Plant Science, Chung-Ang University, Anseong 17546, Republic of Korea.
authors.forename: Jaemin
authors.initials: J
authors.lastname: Lee
authors.affiliation: Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Miryang 50424, Republic of Korea.
authors.forename: Myoung-Hee
authors.initials: MH
authors.lastname: Lee
authors.affiliation: Department of Integrative Plant Science, Chung-Ang University, Anseong 17546, Republic of Korea.
authors.forename: Sanghyun
authors.initials: S
authors.lastname: Lee
authors.affiliation: Department of Food Science and Nutrition & Kimchi Research Institute, Pusan National University, Busan 46241, Republic of Korea.
authors.forename: Eun Ju
authors.initials: EJ
authors.lastname: Cho
keywords: C6 glial cell; Hydrogen peroxide; Oxidative stress; Perilla frutescens var. japonica; Rosmarinic acid