Author/Authors :
Liebe، Roman نويسنده Department of Medicine II, Saarland University, Homburg, Germany , , Krawczyk، Marcin نويسنده Department of Medicine II, Saarland University, Homburg, Germany , , Raszeja-Wyszomirska، Joanna نويسنده Hepatology and Internal Medicine Unit, Department of General Transplant and Liver Surgery, Medical University of Warsaw, Warsaw, Poland Raszeja-Wyszomirska, Joanna , Kruk، Beata نويسنده Department of General, Transplant and Liver Surgery, Medical University of Warsaw, Warsaw, Poland , , Preis، Rebecca نويسنده Gemeinschaftspraxis fur Humangenetik, Homburg, Germany , , Trottier، Jocelyn نويسنده CHU-Quebec, Research Center and the Faculty of Pharmacy, Laval University, Quebec, Canada , , Barbier، Olivier نويسنده CHU-Quebec, Research Center and the Faculty of Pharmacy, Laval University, Quebec, Canada , , Milkiewicz، Piotr نويسنده Department of General, Transplant and Liver Surgery, Medical University of Warsaw, Warsaw, Poland , , Lammert، Frank نويسنده Department of Medicine II, Saarland University, Homburg, Germany ,
Abstract :
The incidence of liver damage due to steroid consumption is increasing due to the omnipresence of the idealized body image and the widespread availability of drugs via the Internet. The genetic factors underlying individual susceptibility are not presently known. A male patient developed cholestatic liver injury two weeks after a two-month course of anabolic steroids. Next-generation sequencing (NGS) of 24 cholestasis-related genes revealed a heterozygous two-basepair deletion in exon 1 of the pregnane X receptor gene (PXR). Serum bile salt levels showed marked imbalances, strongly resembling the changes observed in patients with biliary obstruction. This case of PXR haploinsufficiency reveals transcriptional regulatory functions activated in the liver under xenobiotic stress by steroids, which appear to require two functional copies of the nuclear receptor gene. Deranged bile salt levels outline the central role of PXR in bile acid synthesis, modification, and export.
