Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2005 Mar;14(3):182-7.
doi: 10.1111/j.0906-6705.2005.00265.x.

In vivo and in vitro evidence for autocrine DCoH/HNF-1alpha transcription of albumin in the human epidermis

Affiliations

In vivo and in vitro evidence for autocrine DCoH/HNF-1alpha transcription of albumin in the human epidermis

S Hasse et al. Exp Dermatol. 2005 Mar.

Abstract

The presence of albumin in the human epidermis has been reported more than a decade ago, but until now, it was assumed that this protein is synthesized in the liver and transported to the avascular skin. To our knowledge, transcription of albumin in the human epidermis was never considered. In this report, we present for the first time evidence for autocrine synthesis of albumin in the human epidermis in keratinocytes in situ and in vitro. Using double immunofluorescence labelling, we identified that albumin colocalized together with its transcription factor PCD/DCoH/HNF-1alpha in suprabasal keratinocytes in human full-thickness skin sections and in keratinocytes cultured in serum-free medium. Moreover, albumin and HNF-1alpha protein expression was confirmed by Western blotting in undifferentiated and differentiated keratinocytes as well as in human epidermal suction blister roof extracts. Reverse-transcriptase polymerase chain reaction analysis from human epidermal keratinocytes and epidermal suction blister roofs revealed the transcription of albumin. Using in vivo fluorescence excitation spectroscopy at the surface of human skin, we confirmed albumin as a major constituent yielding a lambda(max) at 295 nm, which was assigned to the single tryptophan 214 fluorophore in this protein. This in vivo result is in agreement with albumin concentrations of 10(-3) M, underlining the importance of this protein in epidermal homeostasis.

PubMed Disclaimer

Publication types

MeSH terms

LinkOut - more resources