title: Malvidin Protects WI-38 Human Fibroblast Cells Against Stress-induced Premature Senescence.
abstract: BACKGROUND
  Malvidin is one of the most abundant components in red wines and black rice. The effects of malvidin on aging and lifespan under oxidative stress have not been fully understood. This study focused on the anti-aging effect of malvidin on stress-induced premature senescence (SIPS) in WI-38 human lung-derived diploid fibroblasts.
  
  
  METHODS
  In order to determine the viability of WI-38 cells, MTT assay was conducted, and malondialdehyde level was determined using thiobarbituric acid-reactive substance assay. Protein expression of inflammation-related factors was also evaluated by Western blot analysis.
  
  
  RESULTS
  Acute and chronic oxidative stress via hydrogen peroxide (H2O2) treatment led to SIPS in WI-38 cells, which showed decreased cell viability, increased lipid peroxidation, and a shortened lifespan in comparison with non-H2O2-treated WI-38 cells. However, malvidin treatment significantly attenuated H2O2-induced oxidative stress by inhibiting lipid peroxidation and increasing cell viability. Furthermore, the lifespan of WI-38 cells was prolonged by malvidin treatment. In addition, malvidin downregulated the expression of oxidative stress-related proteins, including NF-κB, COX-2, and inducible nitric oxide synthase. Furthermore, protein expression levels of p53, p21, and Bax were also regulated by malvidin treatment in WI-38 cells undergoing SIPS.
  
  
  CONCLUSIONS
  Malvidin may potentially inhibit the aging process by controlling oxidative stress.
authors.affiliation: Department of Food Science and Nutrition, Pusan National University, Busan, Rural Development Administration, Miryang, Korea.
authors.forename: Hye Rin
authors.initials: HR
authors.lastname: Seo
authors.affiliation: Department of Food Science and Nutrition, Pusan National University, Busan, Rural Development Administration, Miryang, Korea.
authors.forename: Mi Jin
authors.initials: MJ
authors.lastname: Choi
authors.affiliation: Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Miryang, Korea.
authors.forename: Ji Myung
authors.initials: JM
authors.lastname: Choi
authors.affiliation: Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Miryang, Korea.
authors.forename: Jong Cheol
authors.initials: JC
authors.lastname: Ko
authors.affiliation: Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Miryang, Korea.
authors.forename: Jee Yeon
authors.initials: JY
authors.lastname: Ko
authors.affiliation: Department of Food Science and Nutrition, Pusan National University, Busan, Rural Development Administration, Miryang, Korea.
authors.forename: Eun Ju
authors.initials: EJ
authors.lastname: Cho
keywords: Aging; Fibroblasts; Malvidin; Oxidative stress; Senescence