Oncogene. 1995 Dec 21;11(12):2681-7.

Differential expression of the fos and jun family members c-fos, fosB, Fra-1, Fra-2, c-jun, junB and junD during human epidermal keratinocyte differentiation.

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Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106-4970, USA.

Abstract

Activator protein 1 (AP1) family proteins have been implicated in the regulation of genes expressed in the epidermis. However, no comprehensive analysis of the expression patterns of the known AP1 family proteins in the human epidermis or any other terminally differentiating tissue has been performed. In the present study we describe the localization of c-fos, fosB, Fra-1, Fra-2, c-jun, junB and junD in the normal human epidermis. Each is expressed in specific epidermal layers. c-fos is localized in the nuclei of the upper spinous and granular layer cells. FosB is present in the nuclei in all layers. Fra-1 is absent from the basal layer, but is present in all other layers. Fra-2 is detected in all layers, but staining intensity is increased in the upper spinous layer. c-jun staining is limited to the granular layer, while junB and junD are present in all layers. The differentiation-dependent pattern of expression of the AP1 family members suggest an important role for these proteins in specifying the temporal and spatial pattern of gene expression during keratinocyte differentiation.

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Differential expression of the fos and jun family members c-fos, fosB, Fra-1, Fr...
Differential expression of the fos and jun family members c-fos, fosB, Fra-1, Fra-2, c-jun, junB and junD during human epidermal keratinocyte differentiation.
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Differential expression of the fos and jun family members c-fos, fosB, Fra-1, Fra-2, c-jun, junB and junD during human epidermal keratinocyte differentiation.

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