Volume 25, Issue 3 pp. 270-276
ORIGINAL ARTICLE

Raman characterization of human skin aging

Aurélie Villaret

Corresponding Author

Aurélie Villaret

Centre de Recherche sur la Peau, Pierre Fabre Dermo-Cosmétique, Toulouse, France

Correspondence

Aurélie Villaret, Pierre Fabre Dermo-Cosmétique, Hôtel Dieu Saint Jacques, Toulouse Cedex 3, France.

Email: [email protected]

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Célia Ipinazar

Célia Ipinazar

Centre de Recherche sur la Peau, Pierre Fabre Dermo-Cosmétique, Toulouse, France

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Tuvana Satar

Tuvana Satar

Centre de Recherche sur la Peau, Pierre Fabre Dermo-Cosmétique, Toulouse, France

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Eléonore Gravier

Eléonore Gravier

Centre de Recherche sur la Peau, Pierre Fabre Dermo-Cosmétique, Toulouse, France

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Céline Mias

Céline Mias

Centre de Recherche sur la Peau, Pierre Fabre Dermo-Cosmétique, Toulouse, France

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Emmanuel Questel

Emmanuel Questel

Centre de Recherche sur la Peau, Pierre Fabre Dermo-Cosmétique, Toulouse, France

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Anne-Marie Schmitt

Anne-Marie Schmitt

Centre de Recherche sur la Peau, Pierre Fabre Dermo-Cosmétique, Toulouse, France

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Valérie Samouillan

Valérie Samouillan

CIRIMAT UMR 5085, Institut Carnot, Equipe Physique des Polymères, Paul Sabatier University, Toulouse Cedex, France

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Florence Nadal

Florence Nadal

Centre de Recherche sur la Peau, Pierre Fabre Dermo-Cosmétique, Toulouse, France

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Gwendal Josse

Gwendal Josse

Centre de Recherche sur la Peau, Pierre Fabre Dermo-Cosmétique, Toulouse, France

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First published: 07 November 2018
Citations: 26

Abstract

Background

Skin aging is a complex biological process mixing intrinsic and extrinsic factors, such as sun exposure. At the molecular level, skin aging affects in particular the extracellular matrix proteins.

Materials and Methods

Using Raman imaging, which is a nondestructive approach appropriate for studying biological samples, we analyzed how aging modifies the matrix proteins of the papillary and reticular dermis. Biopsies from the buttock and dorsal forearm of volunteers younger than 30 and older than 60 were analyzed in order to identify chronological and photoaging processes. Analyses were performed on skin section, and Raman spectra were acquired separately on the different dermal layers.

Results

We observed differences in dermal matrix structure and hydration state with skin aging. Chronological aging alters in particular the collagen of the papillary dermis, while photoaging causes a decrease in collagen stability by altering proline and hydroxyproline residues in the reticular dermis. Moreover, chronological aging alters glycosaminoglycan content in both dermal compartments.

Conclusion

Alterations of the papillary and reticular dermal matrix structures during photo- and chronological aging were clearly depicted by Raman spectroscopy.

CONFLICT OF INTEREST

No conflict of interest to declare.

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