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Sökning: WFRF:(Gellera Cinzia)

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  • Ygland, E., et al. (författare)
  • Friedreich's ataxia in patients with FXN p.R165P point mutation
  • Ingår i: European Journal of Neurology. - : Wiley-Blackwell. - 1351-5101. ; 19:Suppl 1, s. 727-727
  • Konferensbidrag (refereegranskat)abstract
    • Introduction: Friedreich's ataxia (FRDA) is a hereditary disorder with progressive postural ataxia, dysarthria, neuropathy, muscle weakness and cardiomyopathy. Lack or malfunction of the protein frataxin due to mutations in the frataxin gene (FXN) is the cause of the disease. Most patients are homozygous for GAA trinucleotide expansions in FXN but disease can also be caused by heterozygosity for the expansion and a point mutation. Milder disease has been reported for some FRDA patients with missense mutations. Methods: We describe 3 FRDA patients, not previously reported, with the FXN p.R165P missense mutation and compared clinical features with 6 homozygous GAA expansion carriers. Patients were interviewed, examined clinically and assessed with FRDA rating scale (FARS). Blood was collected for reanalysis of GAA expansion length and for frataxin measurements. Results: Compared to patients homozygous for FXN GAA expansion, p.R165P mutation carriers had more wellpreserved upper limb function and deep tendon reflexes, considerably milder dysarthria, but possibly an increased occurrence of psychosis. p.R165P patients were more independent in activities of daily living, especially when correlated to disease duration. We found no difference in other clinical aspects or in GAA expansion length. One patient had severe FRDA symptoms and comorbid hemochromatosis, whereas his sibling without hemochromatosis had much milder disease. Refined analysis of GAA expansion length and frataxin levels are in progress. Conclusion: p.R165P FRDA patients appear to progress to a less disabling disease state than typical FRDA. We suggest additive effects of comorbid FRDA and hemochromatosis, due to synergistic abnormalities in iron metabolism.
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  • Resultat 11-13 av 13
  • Föregående 1[2]
 
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