title: Effects of aging and xerosis on the amino acid composition of human skin.
abstract: Amino acid compositions of skin samples from young and old subjects and from age-matched donors with dry skin syndrome (xerosis) were examined. The amino acid contents of the free amino acid (FAA) fraction, soluble hydrolysate (SH) fraction, and whole cell hydrolysate (WCH) were determined. The greatest differences were observed between the FAA compositions of the young and old normal subjects. Xerosis did not appear to affect the amino acid compositions of samples from young subjects as much as old subjects. Overall, the effect of aging on the amino acid contents was more pronounced than the effect of xerosis. The amino acid composition of the FAA showed a high degree of similarity to filaggrin, whereas the WCH showed a similarity to keratin.
authors.affiliation: Department of Biochemistry, University of North Texas/Texas College of Osteopathic Medicine, Ft. Worth 76107.
authors.forename: T M
authors.initials: TM
authors.lastname: Jacobson
authors.forename: K U
authors.initials: KU
authors.lastname: Yüksel
authors.forename: J C
authors.initials: JC
authors.lastname: Geesin
authors.forename: J S
authors.initials: JS
authors.lastname: Gordon
authors.forename: A T
authors.initials: AT
authors.lastname: Lane
authors.forename: R W
authors.initials: RW
authors.lastname: Gracy
mesh_terms: D000375:Aging / Q000502:physiology*; D000596:Amino Acids / Q000032:analysis*; D005260:Female; D000091344:Filaggrin Proteins; D005998:Glycine / Q000032:analysis; D006801:Humans; D007057:Ichthyosis / Q000503:physiopathology*; D007930:Leucine / Q000032:analysis; D010649:Phenylalanine / Q000032:analysis; D012867:Skin / Q000032:analysis*; D014443:Tyrosine / Q000032:analysis
chemical_list: D000596:Amino Acids; C000717249:FLG protein, human; D000091344:Filaggrin Proteins; D014443:Tyrosine; D010649:Phenylalanine; D007930:Leucine; D005998:Glycine