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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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A novel immediate early response gene, IEX-1, is induced by ultraviolet radiation in human keratinocytes.

Skin cancer is the most common human malignancy and is strongly associated with exposure to ultraviolet radiation (UVR). Several mechanisms including an increase in immediate early gene activation have been postulated to be involved in UVR-mediated carcinogenesis. We show that in a dose-dependent manner, UVR induces the expression of messenger RNA of a novel immediate early response gene, IEX-1, in human keratinocytes. Human keratinocytes and mouse fibroblasts transfected with an expression plasmid for IEX-1 grow at a faster rate than keratinocytes transfected with a similar plasmid that does not contain the IEX-1 sequence. IEX-1 protein is localized predominantly in the nucleus of keratinocytes by fluorescent antibody methods and by examination of the location of a green fluorescence IEX-1 fusion protein. Epidermal growth factor ( EGF), a major mitogen of keratinocytes, and a tumor-promoting phorbol ester increase IEX-1 mRNA expression. IEX-1 may play a role in keratinocyte proliferation especially following UVR.[1]

References

  1. A novel immediate early response gene, IEX-1, is induced by ultraviolet radiation in human keratinocytes. Kumar, R., Kobayashi, T., Warner, G.M., Wu, Y., Salisbury, J.L., Lingle, W., Pittelkow, M.R. Biochem. Biophys. Res. Commun. (1998) [Pubmed]
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