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Interferons alpha, beta and gamma induce different patterns of gene expression in cultured human epidermal keratinocytes.

Differences in the effects on confluent epidermal keratinocytes of treatment with interferons (IFNs) alpha, beta, and gamma were observed in their modulation of the mRNA levels of representative structural and functional cellular proteins. Comparisons of the responses in culture media with varying cellular maturation potential indicated the dependence of the modulation on the stage of differentiation. Differentiation was correlated with upregulation of all the genes by interferon gamma, but this effect was not seen with the other interferons. Even though IFNs alpha and beta share the same cell surface receptor, their effects on gene expression were clearly distinguishable and varied with the culture medium. These findings might have relevance in the treatment of skin lesions with varying degrees of differentiation.