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Lichtalterung und infrarote Strahlung

Aktuelle Aspekte molekularer Mechanismen

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Zusammenfassung

Die menschliche Haut ist infraroter (IR-)Strahlung (760 nm–1 mm) aus natürlichen sowie künstlichen Strahlungsquellen ausgesetzt. Insbesondere die Anwendung zu kosmetischen und "Wellness-Zwecken" erfährt eine zunehmende und unkritische Popularität. Epidemiologische Daten und klinische Beobachtungen zeigen jedoch, dass die Wirkung von IR-Strahlung auf die Haut nicht als völlig unbedenklich eingestuft werden kann. Vielmehr scheint IR-Strahlung, ähnlich der UV-Strahlung, an Lichtalterung und -karzinogenese beteiligt zu sein. In neueren Untersuchungen konnten erste molekulare Prozesse wie zelluläre Signaltransduktionsvorgänge und Genexpression charakterisiert werden. Dabei zeigte sich, dass IR-Strahlung über den mitogenaktivierten Proteinkinasesignalweg eine Synthese von Matrixmetalloproteinase-1 induziert. Da dieser Mechanismus einen zentralen pathophysiologischen Faktor der UV-induzierten Hautalterung darstellt, deutet die Aktivierbarkeit durch IR-Strahlung auf ihre Beteiligung bei der vorzeitigen Hautalterung und die mögliche Notwendigkeit eines Schutzes vor unerwünschten IR-Effekten hin.

Abstract

Human skin is exposed to infrared (IR) radiation (760 nm – 1 mm) from natural and artificial sources. In particular, the use of IR for cosmetic and "wellness" purposes has become increasingly popular and viewed as completely safe. However, epidemiological data and clinical observations indicate that IR radiation cannot be considered as totally innocuous to human skin. In particular, IR radiation, just as UV radiation, seems to be involved in photoageing and potentially also in photocarcinogenesis. In recent studies the molecular mechanisms involved in this process such as cellular signal transduction and gene expression have been characterised. IR radiation induces the synthesis of matrix metalloproteinase-1 via the mitogen-activated protein kinase signalling pathway. Since this mechanism is a major pathophysiologic factor in UV-induced skin ageing, its activation by IR radiation points to a role of IR in premature skin ageing and indicates the potential need for protection against unwanted IR effects.

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Correspondence to S. M. Schieke.

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Schieke, S.M. Lichtalterung und infrarote Strahlung. Hautarzt 54, 822–824 (2003). https://doi.org/10.1007/s00105-003-0577-3

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  • DOI: https://doi.org/10.1007/s00105-003-0577-3

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