Abstract
Background: Skin autofluorescence and pigmentation can estimate photodamage and sun exposure. These techniques may quantify differences in actinic damage between high-risk organ transplant recipients (OTRs) and immunocompetent patients. Methods: Age and gender-matched OTRs (n = 15) and immunocompetent controls (n = 15) with a new keratinocyte carcinoma (KC) were included. We measured skin autofluorescence (370 nm excitation, F370) and skin pigmentation at five standardized body sites; and determined black light-evaluated solar lentigines on the shoulders and photosensitivity to UVA and simulated solar radiation (SSR) as minimal erythema doses (MED). Results: F370 autofluorescence values were enhanced at KC site versus other body sites in OTRs (2208 vs. 1458–1898 AU, p < 0.05). Compared with non-OTRs, OTRs expressed higher F370 autofluorescence at KC site (2208 vs. 1385 arbitrary units AU, p = 0.01) and the shoulder (1898 vs. 1525, p = 0.05). Likewise, OTRs had increased skin pigmentation (25.0 vs. 20.8 pigment%, p = 0.05) and solar lentigines (3.5 vs. 3.0, p = 0.048) on the shoulders. MED tests showed increased UVA photosensitivity in OTRs (2.4 vs. 1.7 times higher than expected, p = 0.03), whereas SSR photosensitivity was similar. Conclusion: Quantified F370 autofluorescence, skin pigmentation, and density of solar lentigines could serve to assess photodamage in OTR. Increased UVA photosensitivity may account for higher skin photodamage.
| Original language | English |
|---|---|
| Journal | Journal of Photochemistry and Photobiology, B: Biology |
| Volume | 188 |
| Pages (from-to) | 1-5 |
| Number of pages | 5 |
| ISSN | 1011-1344 |
| DOIs | |
| Publication status | Published - Nov 2018 |
Keywords
- Aged
- Female
- Humans
- Immunocompetence
- Male
- Middle Aged
- Skin/chemistry
- Skin Neoplasms/metabolism
- Skin Pigmentation/radiation effects
- Spectrometry, Fluorescence
- Statistics, Nonparametric
- Transplant Recipients
- Ultraviolet Rays
