Chronic exposure to Rhodobacter sphaeroides extract Lycogen™ prevents UVA-induced malondialdehyde accumulation and procollagen I down-regulation in human dermal fibroblasts

Int J Mol Sci. 2014 Jan 23;15(2):1686-99. doi: 10.3390/ijms15021686.

Abstract

UVA contributes to the pathogenesis of skin aging by downregulation of procollagen I content and induction of matrix metalloproteinase (MMP)-associated responses. Application of antioxidants such as lycopene has been demonstrated as a convenient way to achieve protection against skin aging. Lycogen™, derived from the extracts of Rhodobacter sphaeroides, exerts several biological effects similar to that of lycopene whereas most of its anti-aging efficacy remains uncertain. In this study, we attempted to examine whether Lycogen™ could suppress malondialdehyde (MDA) accumulation and restore downregulated procollagen I expression induced by UVA exposure. In human dermal fibroblasts Hs68 cells, UVA repressed cell viability and decreased procollagen I protein content accompanied with the induction of MMP-1 and MDA accumulation. Remarkably, incubation with 50 µM Lycogen™ for 24 h ameliorated UVA-induced cell death and restored UVA-induced downregulation of procollagen in a dose-related manner. Lycogen™ treatment also prevented the UVA-induced MMP-1 upregulation and intracellular MDA generation in Hs68 cells. Activation of NFκB levels, one of the downstream events induced by UVA irradiation and MMP-1 induction, were also prevented by Lycogen™ administration. Taken together, our findings demonstrate that Lycogen™ may be an alternative agent that prevents UVA-induced skin aging and could be used in cosmetic and pharmaceutical applications.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biological Products / pharmacology*
  • Biological Products / toxicity
  • Cell Death / drug effects
  • Cell Death / radiation effects
  • Cell Survival / drug effects
  • Cell Survival / radiation effects
  • Collagen Type I / metabolism*
  • Down-Regulation / drug effects
  • Fibroblasts / drug effects*
  • Fibroblasts / metabolism*
  • Fibroblasts / radiation effects
  • Humans
  • Malondialdehyde / metabolism*
  • Matrix Metalloproteinase 1 / metabolism
  • NF-kappa B / metabolism
  • Procollagen / metabolism*
  • Rhodobacter sphaeroides / chemistry*
  • Ultraviolet Rays

Substances

  • Biological Products
  • Collagen Type I
  • NF-kappa B
  • Procollagen
  • Malondialdehyde
  • Matrix Metalloproteinase 1