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Comparison of the stratum corneum thickness measured in vivo with confocal Raman spectroscopy and confocal reflectance microscopy.
Skin Res Technol. 2014 Feb; 20(1):50-7.SR

Abstract

BACKGROUND

Thickness measurement of the outermost layer of the skin, the stratum corneum (SC), is essential for in-vivo measurement of the cutaneous bioavailability of topically applied drugs and cosmetics. Our aim was to compare SC thickness calculated from confocal Raman spectroscopy (CRS) data with results of SC thickness based on confocal laser scanning microscopy (CLSM) measurements and with literature data, to validate CRS data with CLSM data and vice versa.

METHODS

SC thickness was measured with two non-invasive devices, confocal Raman spectroscopy and confocal laser scanning microscopy, on four different areas of the body: volar forearm, leg, face and palm in 18 healthy adult subjects.

RESULTS

Comparable results of SC thickness were obtained with both methods, structure analysis of CLSM images, and computation of Fick's first law on water gradients measured with CRS: 20 μm and 19 μm (volar forearm), 21 μm and 22 μm (lower leg), and 13 μm with both methods (cheek), respectively.

DISCUSSION

For the first time it was possible to accurately determine the thickness of SC with CRS and CLSM and to validate both systems against each other and with results of literature data.

CONCLUSION

Both methods, CRS and CLSM, were found to be suitable to measure SC thickness correctly. Therefore, when using CRS, for example to obtain detailed information about the molecular composition of the skin, it is additionally possible to accurately measure SC thickness with the same device to have an orientation in which skin layer molecules are found.

Authors+Show Affiliations

proDERM Institute for Applied Dermatological Research GmbH, Schenefeld/Hamburg, Germany.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23909688

Citation

Böhling, A, et al. "Comparison of the Stratum Corneum Thickness Measured in Vivo With Confocal Raman Spectroscopy and Confocal Reflectance Microscopy." Skin Research and Technology : Official Journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI), vol. 20, no. 1, 2014, pp. 50-7.
Böhling A, Bielfeldt S, Himmelmann A, et al. Comparison of the stratum corneum thickness measured in vivo with confocal Raman spectroscopy and confocal reflectance microscopy. Skin Res Technol. 2014;20(1):50-7.
Böhling, A., Bielfeldt, S., Himmelmann, A., Keskin, M., & Wilhelm, K. P. (2014). Comparison of the stratum corneum thickness measured in vivo with confocal Raman spectroscopy and confocal reflectance microscopy. Skin Research and Technology : Official Journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI), 20(1), 50-7. https://doi.org/10.1111/srt.12082
Böhling A, et al. Comparison of the Stratum Corneum Thickness Measured in Vivo With Confocal Raman Spectroscopy and Confocal Reflectance Microscopy. Skin Res Technol. 2014;20(1):50-7. PubMed PMID: 23909688.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparison of the stratum corneum thickness measured in vivo with confocal Raman spectroscopy and confocal reflectance microscopy. AU - Böhling,A, AU - Bielfeldt,S, AU - Himmelmann,A, AU - Keskin,M, AU - Wilhelm,K-P, Y1 - 2013/06/12/ PY - 2013/05/03/accepted PY - 2013/8/6/entrez PY - 2013/8/6/pubmed PY - 2014/9/10/medline KW - Confocal Raman spectroscopy KW - SC thickness KW - confocal laser scanning microscopy KW - stratum corneum KW - water refraction index-matching fluid SP - 50 EP - 7 JF - Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI) JO - Skin Res Technol VL - 20 IS - 1 N2 - BACKGROUND: Thickness measurement of the outermost layer of the skin, the stratum corneum (SC), is essential for in-vivo measurement of the cutaneous bioavailability of topically applied drugs and cosmetics. Our aim was to compare SC thickness calculated from confocal Raman spectroscopy (CRS) data with results of SC thickness based on confocal laser scanning microscopy (CLSM) measurements and with literature data, to validate CRS data with CLSM data and vice versa. METHODS: SC thickness was measured with two non-invasive devices, confocal Raman spectroscopy and confocal laser scanning microscopy, on four different areas of the body: volar forearm, leg, face and palm in 18 healthy adult subjects. RESULTS: Comparable results of SC thickness were obtained with both methods, structure analysis of CLSM images, and computation of Fick's first law on water gradients measured with CRS: 20 μm and 19 μm (volar forearm), 21 μm and 22 μm (lower leg), and 13 μm with both methods (cheek), respectively. DISCUSSION: For the first time it was possible to accurately determine the thickness of SC with CRS and CLSM and to validate both systems against each other and with results of literature data. CONCLUSION: Both methods, CRS and CLSM, were found to be suitable to measure SC thickness correctly. Therefore, when using CRS, for example to obtain detailed information about the molecular composition of the skin, it is additionally possible to accurately measure SC thickness with the same device to have an orientation in which skin layer molecules are found. SN - 1600-0846 UR - https://www.unboundmedicine.com/medline/citation/23909688/Comparison_of_the_stratum_corneum_thickness_measured_in_vivo_with_confocal_Raman_spectroscopy_and_confocal_reflectance_microscopy_ L2 - https://doi.org/10.1111/srt.12082 DB - PRIME DP - Unbound Medicine ER -