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Niemann-Pick disease type C.

Marie T Vanier1

  • 1Institut National de la Santé et de la Recherche Médicale, Unité 820, Faculté de Médecine Lyon-Est Claude Bernard, 7 Rue G, Paradin, F-69008, Lyon, France. marie-t.vanier@inserm.fr

Orphanet Journal of Rare Diseases
|June 8, 2010
PubMed
Summary

Niemann-Pick C disease (NP-C) is a rare lysosomal disorder affecting the brain and organs. Early diagnosis and symptomatic management, including miglustat for neurological symptoms, are crucial for patients.

Area of Science:

  • Genetics and rare diseases
  • Lysosomal storage disorders
  • Neurodegenerative diseases

Background:

  • Niemann-Pick C disease (NP-C) is a rare, autosomal recessive neurovisceral lysosomal lipid storage disorder.
  • It presents a wide clinical spectrum, from neonatal fatality to adult-onset neurodegeneration, with neurological symptoms often preceded by systemic signs.
  • Neurological manifestations are key to disease severity and include ataxia, dementia, and characteristic vertical supranuclear gaze palsy.

Purpose of the Study:

  • To provide a comprehensive overview of Niemann-Pick C disease (NP-C).
  • To detail the clinical spectrum, genetic basis, diagnostic approaches, and management strategies.
  • To highlight the importance of early diagnosis and symptomatic treatment for patient prognosis.

Main Methods:

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  • Review of clinical presentations, genetic mutations (NPC1, NPC2), and biochemical findings.
  • Description of diagnostic tools including fibroblast filipin staining and genotyping.
  • Discussion of differential diagnoses and current therapeutic options, including miglustat.

Main Results:

  • NP-C is caused by NPC1 or NPC2 gene mutations, affecting cholesterol and ganglioside metabolism.
  • Diagnosis relies on fibroblast studies showing cholesterol accumulation, with genotyping essential for variant phenotypes.
  • Prognosis is strongly linked to the age of neurological symptom onset.

Conclusions:

  • NP-C diagnosis requires a combination of clinical evaluation, biochemical testing, and genetic analysis.
  • Symptomatic management is critical, with miglustat offering a treatment option for neurological symptoms.
  • Understanding the disease's heterogeneity is vital for effective patient care and future therapeutic development.