Archives of Dermatological Research

, Volume 296, Issue 8, pp 359–365

The formation of wrinkles caused by transition of keratin intermediate filaments after repetitive UVB exposure

  • Tomohiko Sano
  • Takuji Kume
  • Tsutomu Fujimura
  • Hiromitsu Kawada
  • Shigeru Moriwaki
  • Yasunori Takema
Original Paper

DOI: 10.1007/s00403-004-0533-9

Cite this article as:
Sano, T., Kume, T., Fujimura, T. et al. Arch Dermatol Res (2005) 296: 359. doi:10.1007/s00403-004-0533-9

Abstract

It has been reported that the formation of wrinkles involves changes in the elastic properties of the dermis due to the denaturation of elastic fibers. Several studies have shown that the hydration condition of the stratum corneum is also important in wrinkle formation. It is, however, still unclear how the stratum corneum contributes to wrinkle formation. Here we investigated the relationship between the formation of wrinkles and changes in the physical properties and condition of the skin after repetitive ultraviolet B (UVB) irradiation of hairless mice (HR/ICR). Repetitive UVB irradiation caused wrinkles on the dorsal skin of the mice. The elasticity (E′) of the stratum corneum of UVB-irradiated mice was significantly lower than that of age-matched control (unirradiated) mice. UVB exposure also caused a deterioration of the fibrous ultrastructure of keratin intermediate filaments (KIFs) in the skin. We conclude that the deterioration of KIFs in the stratum corneum caused by repetitive UVB irradiation decreases the elastic properties of the stratum corneum, resulting in the formation of wrinkles.

Keywords

ElasticityKeratin intermediate filamentsStratum corneumWrinkleRepetitive ultraviolet B exposure

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • Tomohiko Sano
    • 1
  • Takuji Kume
    • 1
  • Tsutomu Fujimura
    • 2
  • Hiromitsu Kawada
    • 1
  • Shigeru Moriwaki
    • 2
  • Yasunori Takema
    • 2
  1. 1.Skin Care Research LaboratoriesKao CorporationTokyoJapan
  2. 2.Biological Science LaboratoriesKao CorporationTochigiJapan