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  • Title: The induction of epidermal ornithine decarboxylase following UV-B irradiation is inhibited by estriol.
    Author: Arnold WP, Pennings BJ, van de Kerkhof PC.
    Journal: Acta Derm Venereol; 1993 Apr; 73(2):92-3. PubMed ID: 8103274.
    Abstract:
    The induction of epidermal ornithine decarboxylase (ODC) can be partially blocked by corticosteroids, retinoic acid or active vitamin D3. The influence of the other members of this so-called "steroid hormone receptor superfamily", namely the sex-steroids and thyroid hormone, is unknown in epidermis, but they enhance ODC induction in certain other tissues. Here we investigated whether topical estriol leads to a spontaneous and/or enhanced epidermal ODC induction 8 h after UV-B irradiation of 6 postmenopausal women. Contrary to expectation, estriol did not stimulate induction but reduced induction by 44%. This observation raises the possibility that all members of the steroid hormone receptor superfamily may share a common AP-1 binding site.
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