A Glycosidic Spinasterol from Koreana stewartia Promotes Procollagen Production and Inhibits Matrix Metalloproteinase-1 Expression in UVB-Irradiated Human Dermal Fibroblasts

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  • Lee Tae Hoon
    Graduate School of Biotechnology and College of Life Science, Kyung Hee University
  • Lee Sang Min
    Graduate School of Biotechnology and College of Life Science, Kyung Hee University
  • Lee Dae-Young
    Graduate School of Biotechnology and College of Life Science, Kyung Hee University
  • Son Youngsook
    Graduate School of Biotechnology and College of Life Science, Kyung Hee University Musculoskeletal Bioorgan Center, Kyung Hee University
  • Chung Dae Kyun
    Graduate School of Biotechnology and College of Life Science, Kyung Hee University Skin Biotechnology Center, Kyung Hee University
  • Baek Nam-In
    Graduate School of Biotechnology and College of Life Science, Kyung Hee University
  • Kim Jiyoung
    Graduate School of Biotechnology and College of Life Science, Kyung Hee University

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Methanol extract of Koreana stewartia leaves (SKE) stimulated collagen production in ultraviolet-B (UVB)-irradiated human fibroblast cells. An active compound was isolated from SKE by successive partitioning and chromatography, and the chemical structure was determined to be 3-O-β-D-glucopyranosylspinasterol (spinasterol-Glc) by spectroscopic characterization. Spinasterol-Glc increased collagen production in the supernatant of UVB-irradiated dermal fibroblast cell cultures in a dose-dependent manner. The effects of spinasteol-Glc on expression of procollagen and matrix metalloproteinase-1 (MMP-1) were further evaluated. We found that the compound stimulated collagen production in UVB-treated fibroblasts than in vehicle-treated control cells by about 3-fold. In addition, we also demonstrate that the compound increased the mRNA and protein levels of procollagen in UVB-treated fibroblast cells, while it inhibited expression of MMP-1. These results indicate that spinasterol-Glc protects fibroblast cells from the adverse effects of UV radiation via stimulation of procollagen synthesis as well as inhibition of MMP-1 expression. Spinasterol-Glc may be useful in the future development of therapeutic and cosmetic applications.

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