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Long-term evaluation of erythema and pigmentation induced by ultraviolet radiations of different wavelengths.
Skin Res Technol. 2007 May; 13(2):154-61.SR

Abstract

BACKGROUNDS/AIMS

Although multiple studies have been reported about the biological effects of ultraviolet (UV) radiations, the comparative and long-term reactions of human skin by several different UV-wavebands were not reported. The aim of this study was to investigate a time course of erythema and pigmentation induced by UVA 1, broad-band UVA (BBUVA), narrow-band UVB (NBUVB) and broad-band UVB (BBUVB).

METHODS

Ten volunteers participated in this study for 6 months. Four skin areas, from the back of each subject, were irradiated with two minimal erythema dose (MED) of four different UV wavelengths corresponding to UVA 1, BBUVA, NBUVB and BBUVB. Skin color changes were evaluated by visual scoring and values were converted into the L*a*b color system.

RESULTS

For both UVA 1 and BBUVA, erythema and pigmentation were most pronounced immediately and 1 h after exposure. Thereafter, erythema rapidly diminished but pigmentation persisted throughout the study. For both NBUVB and BBUVB, test areas reacted with erythema of maximum intensity at 1 and 2 days, respectively. A maximum tanning was reached at 3-6 days for NBUVB and 4-7 days for BBUVB, and the return toward the original color point was at 1 and 3 months, respectively. No significant difference was found in visual and colorimetric evaluation for the time course of skin color changes.

CONCLUSION

Two MED of UVA produced far prolonged erythema and pigmentation than UVB. For UVA, UVA 1 and BBUVA showed similar intensity and time course of skin reaction. For UVB, erythema and pigmentation produced by NBUVB were milder in intensity and shorter in time course than those by BBUVB. These results would provide standard data on time courses and intensity of skin color changes by different UV wavelengths.

Authors+Show Affiliations

Department of Dermatology, Kosin University College of Medicine, Busan, South Korea.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

17374056

Citation

Suh, K-S, et al. "Long-term Evaluation of Erythema and Pigmentation Induced By Ultraviolet Radiations of Different Wavelengths." 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. 13, no. 2, 2007, pp. 154-61.
Suh KS, Roh HJ, Choi SY, et al. Long-term evaluation of erythema and pigmentation induced by ultraviolet radiations of different wavelengths. Skin Res Technol. 2007;13(2):154-61.
Suh, K. S., Roh, H. J., Choi, S. Y., Jeon, Y. S., Doh, K. S., Bae, J. H., & Kim, S. T. (2007). Long-term evaluation of erythema and pigmentation induced by ultraviolet radiations of different wavelengths. 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), 13(2), 154-61.
Suh KS, et al. Long-term Evaluation of Erythema and Pigmentation Induced By Ultraviolet Radiations of Different Wavelengths. Skin Res Technol. 2007;13(2):154-61. PubMed PMID: 17374056.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Long-term evaluation of erythema and pigmentation induced by ultraviolet radiations of different wavelengths. AU - Suh,K-S, AU - Roh,H-J, AU - Choi,S-Y, AU - Jeon,Y-S, AU - Doh,K-S, AU - Bae,J-H, AU - Kim,S-T, PY - 2007/3/22/pubmed PY - 2007/5/23/medline PY - 2007/3/22/entrez SP - 154 EP - 61 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 - 13 IS - 2 N2 - BACKGROUNDS/AIMS: Although multiple studies have been reported about the biological effects of ultraviolet (UV) radiations, the comparative and long-term reactions of human skin by several different UV-wavebands were not reported. The aim of this study was to investigate a time course of erythema and pigmentation induced by UVA 1, broad-band UVA (BBUVA), narrow-band UVB (NBUVB) and broad-band UVB (BBUVB). METHODS: Ten volunteers participated in this study for 6 months. Four skin areas, from the back of each subject, were irradiated with two minimal erythema dose (MED) of four different UV wavelengths corresponding to UVA 1, BBUVA, NBUVB and BBUVB. Skin color changes were evaluated by visual scoring and values were converted into the L*a*b color system. RESULTS: For both UVA 1 and BBUVA, erythema and pigmentation were most pronounced immediately and 1 h after exposure. Thereafter, erythema rapidly diminished but pigmentation persisted throughout the study. For both NBUVB and BBUVB, test areas reacted with erythema of maximum intensity at 1 and 2 days, respectively. A maximum tanning was reached at 3-6 days for NBUVB and 4-7 days for BBUVB, and the return toward the original color point was at 1 and 3 months, respectively. No significant difference was found in visual and colorimetric evaluation for the time course of skin color changes. CONCLUSION: Two MED of UVA produced far prolonged erythema and pigmentation than UVB. For UVA, UVA 1 and BBUVA showed similar intensity and time course of skin reaction. For UVB, erythema and pigmentation produced by NBUVB were milder in intensity and shorter in time course than those by BBUVB. These results would provide standard data on time courses and intensity of skin color changes by different UV wavelengths. SN - 0909-752X UR - https://www.unboundmedicine.com/medline/citation/17374056/Long_term_evaluation_of_erythema_and_pigmentation_induced_by_ultraviolet_radiations_of_different_wavelengths_ L2 - https://doi.org/10.1111/j.1600-0846.2007.00213.x DB - PRIME DP - Unbound Medicine ER -