INFRARED RADIATION SUPPRESSES ULTRAVIOLET B-INDUCED SUNBURN-CELL FORMATION

被引:31
作者
DANNO, K
HORIO, T
IMAMURA, S
机构
[1] Department of Dermatology, Kyoto University Faculty of Medicine, Kyoto-City, 606, 54 Kawahara-Cho, Sakyo-Ku
[2] Department of Dermatology, Kansai Medical University, Moriguchi City, Osaka
关键词
INFRARED; SUNBURN CELL; ULTRAVIOLET RADIATION;
D O I
10.1007/BF00373376
中图分类号
R75 [皮肤病学与性病学];
学科分类号
100206 ;
摘要
Sunburn cell (SC) formation, a quantifiable measure of epidermal cell injury induced in mouse ear skin by ultraviolet-B (UVB) radiation (290-320 nm), was significantly decreased by pre-exposure to infrared radiation (IR), which elevated the surface temperature of ear lobes to 37-42-degrees-C. An autoradiographic study demonstrated that the basal cell labelling indices were significantly reduced in a surface temperature-dependent manner by pre-exposure to IR. Taken together with our previous findings that SC formation depends upon the ratio of cycling to non-cycling cells, the present findings suggest that IR retards the cell cycle and, as a result, decreases SC formation. SC counts were not altered by post-UVB exposure to IR. The effect of IR or the IR-induced increase in surface temperature should be considered when studying cutaneous damage by UVB and sunlight.
引用
收藏
页码:92 / 94
页数:3
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