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Titolo:
Age dependent increase of elastase type protease activity in mouse skin - Effect of UV-irradiation
Autore:
Labat-Robert, J; Fourtanier, A; Boyer-Lafargue, B; Robert, L;
Indirizzi:
Hotel Dieu, Lab Rech Ophtalmol, F-75181 Paris 04, France Hotel Dieu Paris France 04 Lab Rech Ophtalmol, F-75181 Paris 04, France Grp Hosp Charles Foix Jean Rostand, Ctr Rech Bioclin Vieillissement, F-94205 Ivry, France Grp Hosp Charles Foix Jean Rostand Ivry France F-94205 4205 Ivry, France LOreal, F-92583 Clichy, France LOreal Clichy France F-92583LOreal, F-92583 Clichy, France
Titolo Testata:
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
fascicolo: 2-3, volume: 57, anno: 2000,
pagine: 113 - 118
SICI:
1011-1344(200009)57:2-3<113:ADIOET>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
POTENTIAL PROTEOLYTIC ACTIVITY; HUMAN ACTIVATED LYMPHOCYTES; HUMAN-PLASMA FIBRONECTIN; LAMININ RECEPTOR; CELL-DEATH; FIBROBLASTS; FRAGMENTS;
Keywords:
elastase; protease; fibronectin; fibronectin fragments; skin; aging; UV-radiation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Robert, L Hotel Dieu, Lab Rech Ophtalmol, 1 Pl Parvis Notre Dame, F-75181 Paris 04, France Hotel Dieu 1 Pl Parvis Notre Dame Paris France 04 is 04, France
Citazione:
J. Labat-Robert et al., "Age dependent increase of elastase type protease activity in mouse skin - Effect of UV-irradiation", J PHOTOCH B, 57(2-3), 2000, pp. 113-118

Abstract

The effect of chronological aging and photoaging (UV-radiation) on elastase-type enzyme activity of hairless mouse skin was studied. Aging resulted in the increase of elastase type endopeptidase activity extractable from mouse skins. Both chronic UVA and UVB radiation resulted in a significant increase of elastase type activity. PBS extracted only small part of the elastase activity, UV-A produced an increase of about 90-120% according to the type of irradiation (xenon or UV-A SUN) and UV-B produced a 72% increase. Extraction by Triton X-100 suggested that most of the activity is bound to cells and fibrous structures. EDTA inhibited 80-90% of the elastase activity in chronologically aged skin extracts and also the activity induced by UVA radiation suggesting that metallo-elastase(s) are involved, About 30% of theWE induced activity could only be inhibited by EDTA and about 50% by PMSF suggesting that irradiation by UVB increased more serine endopeptidase activity but also MMP-activity. Chronic UVA radiation produced an increase of skin elastase activity equivalent to that observed after 24 months of aging in non-irradiated animals (similar to 100 weeks) corresponding to similar to 90% of total life span of these mice. The total increase produced by UVB was less, but the strong increase of a serine elastase, presumably from PMN-s, appear to produce a much more pronounced biological activity as shown by the presence of fibronectin degradation products in skin extracts. Such degradation products were shown to exert harmful effects on tissues. These results may well have biological significance and distinguish chronological aging and photoaging. (C) 2000 Elsevier Science S.A. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 21:34:53