alexa The relationship between the Young's modulus of the stratum corneum and age: a pilot study.
Genetics

Genetics

Journal of Aging Science

Author(s): Hara Y, Masuda Y, Hirao T, Yoshikawa N, Hara Y, Masuda Y, Hirao T, Yoshikawa N

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Abstract BACKGROUND/PURPOSE: The mechanical properties of the stratum corneum play an important role in protecting the body from external physical stimuli and excessive sensitivity. However, it is difficult to analyze these mechanical properties in vivo. To resolve this problem, we carried out a numerical analysis to calculate the Young's modulus of the stratum corneum. We then investigated the relationship between the Young's modulus of the stratum corneum and age. METHODS: We used a Cutometer(®) and a Dermal Torque Meter(®) for measuring skin mechanical parameters, and optical coherence tomography and an ultrasonic imaging system for measuring skin thickness. Based on these non-invasive results, liner elastic analysis was performed by the finite element method, and the Young's moduli of the stratum corneum and the dermis were calculated by solving an inverse problem. Using these techniques, we analyzed the correlation between the Young's modulus of the stratum corneum for the cheeks of seventy-eight Japanese women aged from 20 to 68 years. RESULTS: In the group study, the mean Young's moduli of the stratum corneum and dermis were calculated 1.993 MPa and 0.066 MPa, respectively. While carrying out individual analyses, there was a weak relationship between the Young's modulus of the stratum corneum and age (r = 0.337). CONCLUSION: We calculated the Young's modulus of the stratum corneum in vivo, with commercially available systems, and found that it is a weak correlation with age in this group of subjects. Future developments of our method would be beneficial in the characterization of facial skin aging and the validation of cosmetic and medical applications. © 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd. This article was published in Skin Res Technol and referenced in Journal of Aging Science

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