title: Heat modulation of tropoelastin, fibrillin-1, and matrix metalloproteinase-12 in human skin in vivo.
abstract: Photoaged skin contains elastotic materials in the upper reticular dermis. This phenomenon is commonly known as solar elastosis. In this study, we investigated the effects of heat on the expression of tropoelastin and fibrillin-1, two main components of elastic fibers, and on matrix metalloproteinase (MMP)-12, the most active MMP against elastin, in human skin in vivo. Heat was found to increase tropoelastin mRNA and protein expression in the epidermis and in the dermis. Fibrillin-1 mRNA and protein expression were increased by heat in the epidermis, but were decreased in the dermis. We found that pre-treatment of skin with N-acetyl cysteine or genistein for 24 h prior to heat treatment inhibited the heat-induced expression of tropoelastin, but not of fibrillin-1. These data indicate that reactive oxygen species may play a role in tropoelastin expression by heat, but not in fibrillin-1 expression. We also found that heat treatment increases MMP-12 mRNA and protein expression in human skin. Our results suggest that the abnormal production of tropoelastin and fibrillin by heat in human skin and that their degradation by various MMP, such as MMP-12, may contribute to the accumulation of elastotic material in photoaged skin.
authors.affiliation: Department of Dermatology, Seoul National University College of Medicine, Laboratory of Cutaneous Aging Research, Clinical Research Institute, Seoul National University Hospital, Institute of Dermatological Science, Seoul National University, Seoul, Korea.
authors.forename: Zhou
authors.initials: Z
authors.lastname: Chen
authors.forename: Jin Young
authors.initials: JY
authors.lastname: Seo
authors.forename: Yeon Kyung
authors.initials: YK
authors.lastname: Kim
authors.forename: Se Rah
authors.initials: SR
authors.lastname: Lee
authors.forename: Kyu Han
authors.initials: KH
authors.lastname: Kim
authors.forename: Kwang Hyun
authors.initials: KH
authors.lastname: Cho
authors.forename: Hee Chul
authors.initials: HC
authors.lastname: Eun
authors.forename: Jin Ho
authors.initials: JH
authors.lastname: Chung
mesh_terms: D000111:Acetylcysteine / Q000494:pharmacology; D000328:Adult; D000906:Antibodies; D000975:Antioxidants / Q000494:pharmacology; D020405:Dermis / Q000502:physiology*; D004791:Enzyme Inhibitors / Q000494:pharmacology; D004817:Epidermis / Q000502:physiology*; D000071838:Fibrillin-1; D000071837:Fibrillins; D015870:Gene Expression / Q000187:drug effects / Q000502:physiology; D019833:Genistein / Q000494:pharmacology; D006358:Hot Temperature; D006801:Humans; D008297:Male; D053508:Matrix Metalloproteinase 12; D008666:Metalloendopeptidases / Q000235:genetics* / Q000378:metabolism; D008840:Microfilament Proteins / Q000235:genetics* / Q000276:immunology / Q000378:metabolism; D012333:RNA, Messenger / Q000032:analysis; D014333:Tropoelastin / Q000235:genetics* / Q000276:immunology / Q000378:metabolism; D054392:Adipokines
chemical_list: D000111:Acetylcysteine; D000906:Antibodies; D000975:Antioxidants; D004791:Enzyme Inhibitors; D000071838:Fibrillin-1; D000071837:Fibrillins; D019833:Genistein; D053508:Matrix Metalloproteinase 12; D008666:Metalloendopeptidases; D008840:Microfilament Proteins; D012333:RNA, Messenger; D014333:Tropoelastin; C000605722:FBN1 protein, human; D054392:Adipokines; C507122:MMP12 protein, human