Effect of chronic exposure to ultraviolet on skin barrier function.
- Author:
Yi-Na WANG
1
;
Hong FANG
;
Hai-Ming WANG
;
Hong-Chao CHEN
Author Information
- Publication Type:Journal Article
- MeSH: Adolescent; Adult; Aged; Elasticity; radiation effects; Female; Humans; Male; Middle Aged; Skin; radiation effects; Skin Aging; radiation effects; Ultraviolet Rays; adverse effects; Young Adult
- From: Journal of Zhejiang University. Medical sciences 2010;39(5):517-522
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the effect of chronic ultraviolet (UV) exposure on skin barrier function and photoaging process.
METHODSOne hundred and fifty-six volunteers from Hanghzou areas were enrolled in the study. UV-exposed skin areas (neck, dorsum of hand or frontier chest) and UV-unexposed areas (waist, buttock or abdomen) were tested. Probe CM 825 of skin multi-functional detector MPA9 was applied to test the skin water content; probe TM 300 was applied to test transepidermal water loss (TEWL) and probe RVM 600 was applied to detect skin elasticity (Ur/Uf). Relative perfusion unit (PU) of the skin was detected by laser doppler flowmetry (LDF).
RESULTSkin water content value at UV-exposed skin areas was 12.78 ± 2.36 in elderly group (>50y), which was significantly lower than that of UV-unexposed skin areas(23.68 ± 3.24, P= 0.036). Highest level of TEWL (12.98 ± 2.86) g . m(-2) . h(-1) was detected at UV-exposed areas in elderly group; there were trends of increasing TEWL levels at UV-exposed areas than at UV-unexposed areas in all age groups, however, there were no statistical differences (P>0.05). The elasticity of Ur/Uf value at UV-exposed skin areas in elderly group was 0.11 ± 0.07, which was remarkably lower than that of UV-unexposed skin areas (0.32 ± 0.1, P=0.028). No significant difference of skin perfusion was observed between UV-exposed and UV-unexposed areas.
CONCLUSIONChronic exposure to UV may damage skin barrier function and therefore play a role in skin photoaging process.
