Abstract
Sebaceous gland hyperplasia and increased sebum secretion after irradiation of ultraviolet (UV)-B has been widely accepted. This study was performed to clarify expression of inflammatory cytokines after irradiating UV-B in cultured sebocytes. Reverse transcription polymerase chain reaction was performed to measure gene expression of inflammatory cytokines, including interleukin (IL)-1β, IL-6, IL-8 and tumor necrosis factor-α, in cultured sebocytes after exposure to 40 and 70mJ/cm(2) UV-B. Protein expression of inflammatory cytokines and lipid production in cultured sebocytes after exposure to UV-B were measured using enzyme-linked immunoassay and lipid analysis kit. The expression of inflammatory cytokines, especially IL-1β and IL-8, was significantly increased in cultured sebocytes after treatment with UV-B. Many more studies on the effect of UV-B on sebaceous glands should be performed to reveal the pathogenic mechanism of acne.
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