Sunscreens with an absorption maximum of > or =360 nm provide optimal protection against UVA1-induced expression of matrix metalloproteinase-1, interleukin-1, and interleukin-6 in human dermal fibroblasts

Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology
Gabriele VielhaberJ Krutmann

Abstract

UVA1-induced expression of matrix metalloproteinase-1 (MMP-1) is mediated by an autocrine mechanism involving the cytokines interleukin-1 and -6 (IL-1 and IL-6). The subsequent degradation of collagen fibers is thought to be the main cause of skin wrinkling. As it is currently not known which wavelengths within the UVA1 range are responsible for these effects, we have assessed 5 UVA1 filters (experimental filters HRH21328 and HRH22127, butyl methoxydibenzoylmethane (BMDM), diethylaminohydroxybenzylbenzoic acid hexyl ester (DHBB) and anisotriazine) with different absorption maxima for their capacity to protect against UVA1-induced MMP-1 expression. To test the efficacy of these hydrophobic filters in a cell culture system, UVA1 irradiation of primary human fibroblasts was performed through a quartz microplate filled with ethanolic solutions of the UVA filters placed on top of the cell microplate. Inhibition of UVA1-induced gene expression was detected by real time RT-PCR. The efficacy to protect against UVA1-induced MMP-1 expression was wavelength dependent: the protection by HRH22127 was best, followed by HRH21328, DHBB, BMDM, and anisotriazine. In addition, HRH22127 and HRH 21328 both significantly inhibited UVA1-induced expre...Continue Reading

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Feb 5, 2014·Journal of Photochemistry and Photobiology. B, Biology·Sônia Aparecida FigueiredoMaria José Vieira Fonseca
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