Journal
NEUROLOGICAL SCIENCES
Volume 32, Issue 2, Pages 327-330Publisher
SPRINGER-VERLAG ITALIA SRL
DOI: 10.1007/s10072-010-0326-1
Keywords
Allele; Frataxin; Friedreich's ataxia; GAA repeats
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Friedreich's ataxia (FRDA) is the most common of the inherited ataxias and is associated with GAA trinucleotide repeat expansions within the first intron of the frataxin (FXN) gene. There are expanded FXN alleles from 66 to 1,700 GAA center dot TTC repeats in FRDA patients and correlations between number of GAA repeats and frataxin protein levels are assumed. Here, we present for the first time frataxin protein levels as well as analysis of GAA triplet repeats in the FXN gene in a population of 50 healthy Austrian people. Frataxin protein levels were measured in lymphocytes from blood samples by ELISA and GAA repeats were analyzed by capillary electrophoresis. Rather unexpectedly, we found a high variation of frataxin protein levels among the individuals. In addition, there was no correlation between frataxin levels, GAA repeats, age and sex in this group. However, these findings are of great importance for better characterization of the disease.
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