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Niemann-Pick Type C-2 Disease: Identification by Analysis of Plasma Cholestane-3β,5α,6β-Triol and Further Insight into the Clinical Phenotype

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JIMD Reports, Volume 23

Abstract

Introduction: Niemann-Pick type C disease is a rare disorder caused by impaired intracellular lipid transport due to mutations in either the NPC1 or the NPC2 gene. Ninety-five % of NPC patients show mutations in the NPC1 gene. A much smaller number of patients suffer from NPC2 disease and present respiratory failure as one of the most frequent symptoms. Several plasma oxysterols are highly elevated in NPC1 and can be used as a biomarker in the diagnosis of NPC1.

Methods: Plasma cholestane-3β,5α,6β-triol was evaluated as biomarker for NPC2 by GC/MS and LC-MS/MS analysis. The diagnosis was confirmed by Sanger sequencing and filipin staining.

Results: We report three NPC2 patients with typical respiratory problems and a detailed description of the nature of the lung disease in one of them. All patients had elevated levels of plasma cholestane-3β,5α,6β-triol. In two of these patients, the positive oxysterol result led to a rapid diagnosis of NPC2 by genetic analysis. The phenotype of the third patient has been described previously. In this patient a cholestane-3β,5α,6β-triol concentration markedly above the reference range was found.

Conclusions: Measurement of plasma cholestane-3β,5α,6β-triol enables to discriminate between controls and NPC1 and NPC2 patients, making it a valuable biomarker for the rapid diagnosis not only for NPC1 but also for NPC2 disease.

The measurement of oxysterols should be well kept in mind in the differential diagnosis of lysosomal diseases, as the elevation of oxysterols in plasma may speed up the diagnosis of NPC1 and NPC2.

Competing interests: None declared

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Correspondence to T. Marquardt .

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Communicated by: Maurizio Scarpa, MD, PhD

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Conflict of Interest

The work of Thorsten Marquardt and Janine Reunert is part of an investigator-initiated study, funded by a grant from Actelion Pharmaceuticals Ltd.

The work of Matthias Griese was supported by eRARE-2009 (EUPAPNet), DFG-970/8-1, and FP7-chILD-EU. The funding sources had no involvement in the collection, analysis, and interpretation of data or in the writing of the report.

Janine Reunert has received travel reimbursements and speaker honorarium from Actelion Pharmaceuticals Ltd, Allschwil, Switzerland.

Giulia Polo has received travel reimbursements and speaker honorarium from Actelion Pharmaceuticals Ltd, Allschwil, Switzerland.

Frank Kannenberg has received speaker honorarium from Actelion Pharmaceuticals Ltd, Allschwil, Switzerland.

Eugen Mengel has received travel reimbursements and speaker honorarium from Actelion Pharmaceuticals Ltd, Allschwil, Switzerland.

Andrea Dardis has received travel reimbursements and speaker honorarium from Actelion Pharmaceuticals Ltd, Allschwil, Switzerland.

Alessandro Burlina has received travel reimbursements and speaker honorarium from Actelion Pharmaceuticals Ltd, Allschwil, Switzerland.

Bruno Bembi has received travel reimbursements and speaker honorarium from Actelion Pharmaceuticals Ltd, Allschwil, Switzerland.

Alberto Burlina has received travel reimbursements and speaker honorarium from Actelion Pharmaceuticals Ltd, Allschwil, Switzerland.

Thorsten Marquardt has received travel reimbursements and speaker honorarium from Actelion Pharmaceuticals Ltd, Allschwil, Switzerland.

Amelie Lotz-Havla, Manfred Fobker, Ania Muntau, Philipp Schnabel, Olaf Sommerburg, Ingo Borggraefe, Matthias Mall, and Giovanni Ciana declare that they have no conflict of interest. None of the authors has nonfinancial interests that may be relevant to the submitted work.

Informed Consent

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000 (5). Informed consent was obtained from all patients for being included in the study.

Details of the Contributions of Individual Authors

Janine Reunert: acquisition and analysis of data, drafting, and revising the manuscript.

Amelie Lotz-Havla and Andrea Dardis: acquisition and interpretation of data, involved in drafting and revising the manuscript.

Giulia Polo, Matthias Griese, Frank Kannenberg, Eugen Mengel, Manfred Fobker, Ania Muntau, Ingo Borggraefe, Philipp Schnabel, Olaf Sommerburg, Alessandro Burlina, Matthias Mall, Giovanni Ciana, and Bruno Bembi: acquisition and interpretation of data, revising the manuscript.

Alberto Burlina and Thorsten Marquardt: supervising and design of the study, acquisition and interpretation of data, revising the manuscript.

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© 2015 SSIEM and Springer-Verlag Berlin Heidelberg

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Reunert, J. et al. (2015). Niemann-Pick Type C-2 Disease: Identification by Analysis of Plasma Cholestane-3β,5α,6β-Triol and Further Insight into the Clinical Phenotype. In: Zschocke, J., Baumgartner, M., Morava, E., Patterson, M., Rahman, S., Peters, V. (eds) JIMD Reports, Volume 23. JIMD Reports, vol 23. Springer, Berlin, Heidelberg. https://doi.org/10.1007/8904_2015_423

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  • DOI: https://doi.org/10.1007/8904_2015_423

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-662-47466-2

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