Mechanical Properties of Stratum Corneum in Glycerin Solution by Atomic Force Microscopy

Yanagiya, Shin-ichiro; Takahashi, Aiko; Goto, Nobuo

doi:10.1380/ejssnt.2015.461

Cited by 1 publication

(1 citation statement)

References 16 publications

(20 reference statements)

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“…Atomic force microscopy (AFM) is capable of generating high-resolution nanoscale images while simultaneously probing the nanomechanical properties of corneocytes [21][22][23][24][25]. The AFM has been used to characterize the effect of moisturizers [25] and different concentrations of glycerin [26] on the outermost epidermis layer. Therefore, to aid in the understanding of microcomedone dissolution in the presence of NaSal ex vivo, we have employed AFM to probe the nanomechanical properties of microcomedones pre-and post-treatment with 2% NaSal.…”

Section: Discussionmentioning

confidence: 99%

Characterizing the nanomechanical properties of microcomedones after treatment with sodium salicylate ex vivo using atomic force microscopy

Al-Rekabi

Rawlings²,

Lucas

et al. 2021

Intern J of Cosmetic Sci

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Objective The treatment of acne presents a major clinical and dermatological challenge. Investigating the nanomechanical properties of the microcomedone precursor lesions using atomic force microscopy (AFM) may prove beneficial in understanding their softening, dissolution and prevention. Although the exact biochemical mechanism of NaSal on microcomedones is not fully understood at present, it appears to exhibit a significant exfoliation effect on the skin via corneodesmosome dissolution. Methods Therefore, to support this exploration, sodium salicylate (NaSal), a common ingredient employed in skin care products, is applied ex vivo to microcomedones,collected by nose strip adhesive tape, and their nanomechanical properties are assessed using AFM. Although the exact biochemical mechanism of NaSal on microcomedones is not fully understood at present, it appears to exhibit a significant exfoliation effect on the skin via corneodesmosome dissolution. Results Herein, our findings demonstrate that when microcomedones are treated with 2% NaSal, samples appeared significantly more compliant (‘softer’) ((1.3 ± 0.62) MPa) when compared to their pre‐treated measurements ((7.2 ± 3.6) MPa; p = 0.038). Furthermore, elastic modulus maps showed that after 2% NaSal treatment, areas in the microcomedone appeared softer and swollen in some, but not in all areas, further proving the valuable impact of 2% NaSal solution in altering the biomechanical properties and morphologies in microcomedones. Conclusion Our results are the first of their kind to provide qualitative and quantitative mechanobiological evidence that 2% NaSal decreases the elastic modulus of microcomedones. Therefore, this study provides evidence that NaSal can be beneficial as an active ingredient in topical treatments aimed at targeting microcomedones.

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