Involvement of lipid peroxidation and organic peroxides in UVA-induced matrix metalloproteinase-1 expression

T Polte, R M Tyrrell

Research output: Contribution to journalArticle

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Abstract

Ultraviolet A (UVA) irradiation causes human skin aging and skin cancer at least partially through the activation of matrix metalloproteinases (MMPs). MMP-1, the interstitial collagenase, is responsible for the degradation of collagen and is involved in tumor progression in human skin. The present study uses human skin fibroblast cells (FEK4) to investigate the involvement of lipid peroxidation and the role of peroxides as possible mediators in MMP-1 activation by UVA. Preincubation with the antioxidants butylated hydroxytoluene and Trolox reduced UVA-dependent MMP-1 upregulation, suggesting that peroxidation of membrane lipids is involved. Blocking the iron-driven generation of lipid peroxides and hydroxyl radicals by different iron chelators led to a decrease in UVA-induced MMP-1 mRNA accumulation. Moreover, modulation of glutathione peroxidase activity by use of the specific inhibitor mercaptosuccinate (MS) or by the depletion of glutathione (using buthionine-S, R-sulfoximine, BSO), enhanced the UVA-dependent MMP-1 response. Finally, UVA irradiation generated a significant increase in intracellular peroxide levels which is augmented by pretreatment of the cells with BSO or MS. Our results demonstrate that lipid peroxidation and the production of peroxides are important events in the signalling pathway of MMP-1 activation by UVA. (C) 2004 Elsevier Inc. All rights reserved.
Original languageEnglish
Pages (from-to)1566-1574
Number of pages9
JournalFree Radical Biology and Medicine
Volume36
Issue number12
DOIs
Publication statusPublished - 2004

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Matrix Metalloproteinase 1
Peroxides
Lipid Peroxidation
Lipids
Skin
Chemical activation
Iron
Cells
Irradiation
Skin Aging
Butylated Hydroxytoluene
Lipid Peroxides
Skin Neoplasms
Fibroblasts
Membrane Lipids
Chelating Agents
Glutathione Peroxidase
Matrix Metalloproteinases
Hydroxyl Radical
Glutathione

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Involvement of lipid peroxidation and organic peroxides in UVA-induced matrix metalloproteinase-1 expression. / Polte, T; Tyrrell, R M.

In: Free Radical Biology and Medicine, Vol. 36, No. 12, 2004, p. 1566-1574.

Research output: Contribution to journalArticle

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AB - Ultraviolet A (UVA) irradiation causes human skin aging and skin cancer at least partially through the activation of matrix metalloproteinases (MMPs). MMP-1, the interstitial collagenase, is responsible for the degradation of collagen and is involved in tumor progression in human skin. The present study uses human skin fibroblast cells (FEK4) to investigate the involvement of lipid peroxidation and the role of peroxides as possible mediators in MMP-1 activation by UVA. Preincubation with the antioxidants butylated hydroxytoluene and Trolox reduced UVA-dependent MMP-1 upregulation, suggesting that peroxidation of membrane lipids is involved. Blocking the iron-driven generation of lipid peroxides and hydroxyl radicals by different iron chelators led to a decrease in UVA-induced MMP-1 mRNA accumulation. Moreover, modulation of glutathione peroxidase activity by use of the specific inhibitor mercaptosuccinate (MS) or by the depletion of glutathione (using buthionine-S, R-sulfoximine, BSO), enhanced the UVA-dependent MMP-1 response. Finally, UVA irradiation generated a significant increase in intracellular peroxide levels which is augmented by pretreatment of the cells with BSO or MS. Our results demonstrate that lipid peroxidation and the production of peroxides are important events in the signalling pathway of MMP-1 activation by UVA. (C) 2004 Elsevier Inc. All rights reserved.

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