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Publication Detail
Genetic analysis of inherited leukodystrophies: genotype-phenotype correlations in the CSF1R gene.
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Case Reports
  • Authors:
    Guerreiro R, Kara E, Le Ber I, Bras J, Rohrer JD, Taipa R, Lashley T, Dupuits C, Gurunlian N, Mochel F, Warren JD, Hannequin D, Sedel F, Depienne C, Camuzat A, Golfier V, Du Boisguéheneuc F, Schottlaender L, Fox NC, Beck J, Mead S, Rossor MN, Hardy J, Revesz T, Brice A, Houlden H
  • Publication date:
    07/2013
  • Pagination:
    875, 882
  • Journal:
    JAMA Neurol
  • Volume:
    70
  • Issue:
    7
  • Status:
    Published
  • Country:
    United States
  • Language:
    eng
  • Keywords:
    Adult, Age of Onset, Europe, Exome, Female, Genetic Association Studies, Hereditary Central Nervous System Demyelinating Diseases, Humans, Leukoencephalopathies, Male, Middle Aged, Mutation, Pedigree, Receptor, Macrophage Colony-Stimulating Factor
Abstract
IMPORTANCE: The leukodystrophies comprise a clinically and genetically heterogeneous group of progressive hereditary neurological disorders mainly affecting the myelin in the central nervous system. Their onset is variable from childhood to adulthood and presentation can be with a variety of clinical features that include mainly for adult-onset cases cognitive decline, seizures, parkinsonism, muscle weakness, neuropathy, spastic paraplegia, personality/behavioral problems, and dystonia. Recently, Rademakers and colleagues identified mutations in the CSF1R gene as the cause of hereditary diffuse leukoencephalopathy with spheroids (HDLS), offering the possibility for an in-life diagnosis. The detection of mutations in this gene in cases diagnosed with different clinical entities further demonstrated the difficulties in the clinical diagnosis of HDLS. OBJECTIVE: To better understand the genetic role of mutations in this gene, we sequenced a large cohort of adult-onset leukodystrophy cases. DESIGN: Whole-exome sequencing and follow up-screening by Sanger sequencing. SETTING: Collaborative study between the Institute of Neurology, University College London and the Inserm, Paris, France. PARTICIPANTS: A total of 114 probands, mostly European patients, with a diagnosis of adult-onset leukodystrophy or atypical cases that could fit within a picture of leukodystrophy. These included 3 extended families within the spectrum of leukodystrophy phenotype. INTERVENTIONS: Whole-exome sequencing in a family and Sanger sequencing of CSF1R. MAIN OUTCOMES AND MEASURES: Mutations in CSF1R. RESULTS: We identified 12 probands with mutations in CSF1R. The clinical diagnoses given to these patients included dementia with spastic paraplegia, corticobasal degeneration syndrome, and stroke disorders. Our study shows that CSF1R mutations are responsible for a significant proportion of clinically and pathologically proven HDLS. CONCLUSIONS AND RELEVANCE: These results give an indication of the frequency of CSF1R mutations in a European leukodystrophy series and expand the phenotypic spectrum of disorders that should be screened for this gene.
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