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

Expression of the human ABCC6 gene is induced by retinoids through the retinoid X receptor.

Mutations in the human ABCC6 gene are responsible for the disease pseudoxanthoma elasticum, although the physiological function or substrate of the gene product (an ABC transporter known also as MRP6) is not known. We found that the expression of this gene in cells of hepatic origin (where this gene is predominantly expressed in the body) is significantly upregulated by retinoids, acting as agonists of the retinoid X receptor (RXR) rather than the retinoid A receptor ( RAR). The direct involvement of this nuclear receptor in the transcriptional regulation of ABCC6 gene expression was confirmed by transient transfection and chromatin immunoprecipitation assays. This constitutes the first direct proof of previously suggested involvement of nuclear hormone receptors in ABCC6 gene expression and the first identification of a transcription factor which may be relevant to regulation of ABCC6 level in tissues and in some PXE patients.[1]


  1. Expression of the human ABCC6 gene is induced by retinoids through the retinoid X receptor. Ratajewski, M., Bartosz, G., Pulaski, L. Biochem. Biophys. Res. Commun. (2006) [Pubmed]
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