Human Cell

, Volume 22, Issue 2, pp 31–37 | Cite as

Donor age-dependent acceleration of cellular aging by repeated ultraviolet A irradiation of human dermal fibroblasts derived from a single donor

  • Eiji Naru
  • Toshiro Ohta
  • Ken Inomata
  • Akinobu Hayashi
  • Kazuhiko Kaji
Research Article

Abstract

The relationship between cellular aging and aging of entire organisms has been studied extensively. The findings are confusing, however, and no clear relationships have been demonstrated. The conflicting data may be due to individual differences among the donors of the studied cells. It is crucial to identify the changes in cellular properties that are the result of the aging process. Here, we used human dermal fibroblast cell lines established from a single donor at different ages to assess the influence of ultraviolet A (UVA) on cellular aging. These cell lines have the same genetic background and were obtained from a restricted body region. The results indicated that cellular aging was accelerated by UVA irradiation in a donor age-dependent manner. The ratio of lifespan shortening increased with donor age. Increased donor age not only decreased cell division, but also increased the growth arrest response to UVA irradiation. The characteristics of the cultured cells reflected the age-related changes in dermal fibroblasts.

Key words

donor age fibroblast in vitro aging 

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Copyright information

© Society and Springer Japan 2009

Authors and Affiliations

  • Eiji Naru
    • 1
  • Toshiro Ohta
    • 2
  • Ken Inomata
    • 1
  • Akinobu Hayashi
    • 1
  • Kazuhiko Kaji
    • 2
  1. 1.Research and Development DivisionKOSÉ CorporationTokyoJapan
  2. 2.Laboratory of Cell and Molecular Biology of Aging, Graduate School of Nutritional and Environmental SciencesUniversity of ShizuokaShizuokaJapan

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