Wilson disease at a single cell level: Intracellular copper trafficking activates compartment-specific responses in hepatocytes

Martina Ralle, Dominik Huster, Stefan Vogt, Wiebke Schirrmeister, Jason L. Burkhead, Tony R. Capps, Lawrence Gray, Barry Lai, Edward Maryon, Svetlana Lutsenko

Research output: Contribution to journalArticle

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Abstract

Wilson disease (WD) is a severe hepato-neurologic disorder that affects primarily children and young adults. WD is caused by mutations in ATP7B and subsequent copper overload. However, copper levels alone do not predict severity of the disease. We demonstrate that temporal and spatial distribution of copper in hepatocytes may play an important role in WD pathology. High resolution synchrotron-based x-ray fluorescence imaging in situ indicates that copper does not continuously accumulate in Atp7b-/- hepatocytes, but reaches a limit at 90-300 fmol. The lack of further accumulation is associated with the loss of copper transporter Ctr1 from the plasma membrane and the appearance of copper-loaded lymphocytes and extracellular copper deposits. The WD progression is characterized by changes in subcellular copper localization and transcriptome remodeling. The synchrotron-based x-ray fluorescence imaging and mRNA profiling both point to the key role of nucleus in the initial response to copper overload and suggest time-dependent sequestration of copper in deposits as a protective mechanism. The metabolic pathways, up-regulated in response to copper, show compartmentalization that parallels changes in subcellular copper concentration. In contrast, significant down-regulation of lipid metabolism is observed at all stages of WD irrespective of copper distribution. These observations suggest new stage-specific as well as general biomarkers for WD. The model for the dynamic role of copper in WD is proposed.

Original languageEnglish (US)
Pages (from-to)30875-30883
Number of pages9
JournalJournal of Biological Chemistry
Volume285
Issue number40
DOIs
StatePublished - Oct 1 2010

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Hepatolenticular Degeneration
Copper
Hepatocytes
Synchrotrons
Optical Imaging
Fluorescence
Copper deposits
X-Rays
Imaging techniques
X rays
Lymphocytes
Biomarkers
Pathology
Cell membranes
Metabolic Networks and Pathways
Nervous System Diseases
Spatial distribution
Lipid Metabolism
Transcriptome
Disease Progression

ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology
  • Molecular Biology
  • Medicine(all)

Cite this

Wilson disease at a single cell level : Intracellular copper trafficking activates compartment-specific responses in hepatocytes. / Ralle, Martina; Huster, Dominik; Vogt, Stefan; Schirrmeister, Wiebke; Burkhead, Jason L.; Capps, Tony R.; Gray, Lawrence; Lai, Barry; Maryon, Edward; Lutsenko, Svetlana.

In: Journal of Biological Chemistry, Vol. 285, No. 40, 01.10.2010, p. 30875-30883.

Research output: Contribution to journalArticle

Ralle, M, Huster, D, Vogt, S, Schirrmeister, W, Burkhead, JL, Capps, TR, Gray, L, Lai, B, Maryon, E & Lutsenko, S 2010, 'Wilson disease at a single cell level: Intracellular copper trafficking activates compartment-specific responses in hepatocytes', Journal of Biological Chemistry, vol. 285, no. 40, pp. 30875-30883. https://doi.org/10.1074/jbc.M110.114447
Ralle, Martina ; Huster, Dominik ; Vogt, Stefan ; Schirrmeister, Wiebke ; Burkhead, Jason L. ; Capps, Tony R. ; Gray, Lawrence ; Lai, Barry ; Maryon, Edward ; Lutsenko, Svetlana. / Wilson disease at a single cell level : Intracellular copper trafficking activates compartment-specific responses in hepatocytes. In: Journal of Biological Chemistry. 2010 ; Vol. 285, No. 40. pp. 30875-30883.
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