title: Pangenomic changes induced by DHEA in the skin of postmenopausal women.
abstract: The objective of this study was to explore, for the first time, the changes in the pangenomic profile induced in human skin in women treated with dehydroepiandrosterone (DHEA) applied locally. Sixty postmenopausal women participated in this phase II prospective, randomized, double-blind and placebo-controlled study. Women were randomized to the twice daily local application of 0% (placebo), 0.3%, 1% or 2% DHEA cream. Changes in the pangenomic expression profile were studied using Affymetrix Genechips. Significant changes (p<0.05) in sixty-six DHEA-responsive probe sets corresponding to 52 well-characterized genes and 9 unknown gene sequences were identified. A dose-dependent increase in the expression of several members of the collagen family was observed, namely COL1, COL3 and COL5 as well as the concomitant modulation of SPARC, a gene required for the normal deposition and maturation of collagen fibrils in the dermis. Several genes involved in the proliferation and differentiation of keratinocytes were also modulated. In addition, topical DHEA reduced the expression of genes associated with the terminal differentiation and cornification of keratinocytes. Our results strongly suggest the possibility that DHEA could exert an anti-aging effect in the skin through stimulation of collagen biosynthesis, improved structural organization of the dermis while modulating keratinocyte metabolism.
authors.affiliation: Oncology and Molecular Endocrinology Research Center, Centre de recherche du Centre hospitalier de l'Université Laval (CHUL Research Center), Québec City, Quebec, G1V 4G2 Canada.
authors.forename: E
authors.initials: E
authors.lastname: Calvo
authors.forename: V
authors.initials: V
authors.lastname: Luu-The
authors.forename: J
authors.initials: J
authors.lastname: Morissette
authors.forename: C
authors.initials: C
authors.lastname: Martel
authors.forename: C
authors.initials: C
authors.lastname: Labrie
authors.forename: B
authors.initials: B
authors.lastname: Bernard
authors.forename: F
authors.initials: F
authors.lastname: Bernerd
authors.forename: C
authors.initials: C
authors.lastname: Deloche
authors.forename: V
authors.initials: V
authors.lastname: Chaussade
authors.forename: J
authors.initials: J
authors.lastname: Leclaire
authors.forename: F
authors.initials: F
authors.lastname: Labrie
mesh_terms: D000287:Administration, Topical; D000368:Aged; D002454:Cell Differentiation / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D003687:Dehydroepiandrosterone / Q000494:pharmacology*; D005260:Female; D020869:Gene Expression Profiling; D006801:Humans; D015603:Keratinocytes / Q000166:cytology; D008875:Middle Aged; D017698:Postmenopause / Q000187:drug effects / Q000502:physiology*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012867:Skin / Q000187:drug effects / Q000378:metabolism*
chemical_list: D003687:Dehydroepiandrosterone