Dietary lutein/zeaxanthin partially reduces photoaging and photocarcinogenesis in chronically UVB-irradiated Skh-1 hairless mice

S. Astner, A. Wu, J. Chen, N. Philips, F. Rius-Diaz, C. Parrado, M. C. Mihm, D. A. Goukassian, M. A. Pathak, S. González

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Lutein and zeaxanthin are xanthophyll carotenoids with potent antioxidant properties protecting the skin from acute photodamage. This study extended the investigation to chronic photodamage and photocarcinogenesis. Mice received either a lutein/zeaxanthin-supplemented diet or a standard nonsupplemented diet. Dorsal skin of female Skh-1 hairless mice was exposed to UVB radiation with a cumulative dose of 16,000 mJ/cm2 for photoaging and 30,200 mJ/cm 2 for photocarcinogenesis. Clinical evaluations were performed weekly, and the animals were sacrificed 24 h after the last UVB exposure. For photoaging experiments, skin fold thickness, suprapapillary plate thickness, mast cell counts and dermal desmosine content were evaluated. For photocarcinogenesis, samples of tumors larger than 2 mm were analyzed for histological characterization, hyperproliferation index, tumor multiplicity, total tumor volume and tumor-free survival time. Results of the photoaging experiment revealed that skin fold thickness and number of infiltrating mast cells following UVB irradiation were significantly less in lutein/zeaxanthin- treated mice when compared to irradiated animals fed the standard diet. The results of the photocarcinogenesis experiment were increased tumor-free survival time, reduced tumor multiplicity and total tumor volume in lutein/zeaxanthin- treated mice in comparison with control irradiated animals fed the standard diet. These data demonstrate that dietary lutein/zeaxanthin supplementation protects the skin against UVB-induced photoaging and photocarcinogenesis.

Original languageEnglish
Pages (from-to)283-291
Number of pages9
JournalSkin Pharmacology and Physiology
Volume20
Issue number6
DOIs
StatePublished - Oct 2007
Externally publishedYes

Keywords

  • Carotenoids
  • Lutein
  • Photoaging
  • Photocarcinogenesis
  • Zeaxanthin

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