Lee YS, Sohn KC, Jang S, Lee Y, Hwang C, Kim KH, Cho MJ, Kim CD, Lee JH. Anti-apoptotic role of S100A8 in X-ray irradiated keratinocytes.
J Dermatol Sci 2008;
51:11-8. [PMID:
18325741 DOI:
10.1016/j.jdermsci.2008.01.003]
[Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2007] [Revised: 12/31/2007] [Accepted: 01/15/2008] [Indexed: 01/13/2023]
Abstract
BACKGROUND
Ionizing radiation is used to treat a lot of cancers, however, it also produced unwanted side effect on normal tissues, such as radiodermatitis. We previously established an animal model for radiodermatitis, and identified many of radiation-induced genes by cDNA microarray. Of the candidates, we chose S100A8 gene for a further study.
OBJECTIVE
The aim of this study is to investigate the functional role of S100A8 in X-ray irradiated keratinocytes.
METHODS
RT-PCR and immunohistochemistry were performed to demonstrate the S100A8 induction by X-ray irradiation. HaCaT keratinocytes were transduced with the recombinant adenovirus expressing GFP-S100A8, and then effects on cell cycle and apoptosis were analyzed using flow cytometry and Western blot.
RESULTS
X-ray irradiation markedly induced S100A8 expression in the hyperplastic epidermis of mouse. Overexpression of S100A8 by adenoviral transduction led to the enhancement of cell proliferation in the absence and/or presence of X-ray irradiation, as compared with Ad/GFP control group. Furthermore, overexpression of S100A8 significantly protected the X-ray-induced apoptosis.
CONCLUSION
These results suggest that S100A8 have an anti-apoptotic role in X-ray irradiated keratinocytes.
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