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

Suppression of type I interferon signaling proteins is an early event in squamous skin carcinogenesis.

PURPOSE: IFN-based therapy has been shown to be active in the treatmentof squamous cell carcinoma ( SCC) of the skin, the most aggressive form of non-melanoma skin cancer. Based largely on this activity, we began programmatically examining the expression of IFN-stimulated gene factor 3 ( ISGF-3) proteins (signal transducers and activators of transcription 1alpha/beta, signal transducers and activators of transcription 2, and p48), which are important mediators of IFN-alpha signaling, in skin premalignancy and SCC. Our previous preliminary studies suggested suppression of some or all of the ISGF-3 proteins in skin SCC. EXPERIMENTAL DESIGN: To determine the timing of the suppression of IFN-alpha signaling proteins in squamous skin carcinogenesis, we have now compared ISGF-3 expression by immunohistochemical staining in biopsies of actinic keratosis, a form of skin premalignancy, and matched normal skin. RESULTS: We observed a significant decrease in expression of one or more ISGF-3 proteins in 76% of patients with actinic keratosis (19 of 25 patients). In addition, we found a suppression of one or more ISGF-3 proteins in 67% of skin SCC patients tested (12 of 18 patients), confirming our previous observations. CONCLUSIONS: These data have led to the hypothesis that the suppressed expression of ISGF-3 proteins and consequent reduction in responsiveness to endogenous IFN likely are an early event in skin carcinogenesis.[1]


  1. Suppression of type I interferon signaling proteins is an early event in squamous skin carcinogenesis. Clifford, J.L., Walch, E., Yang, X., Xu, X., Alberts, D.S., Clayman, G.L., El-Naggar, A.K., Lotan, R., Lippman, S.M. Clin. Cancer Res. (2002) [Pubmed]
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