Active clinical trials for "Friedreich Ataxia"

The purposes of this study are to learn about significant life changes for people with Friedreich's ataxia and about patients' experiences with health care providers. Friedreich's ataxia is a rare genetic disorder in which patients experience progressive muscle weakness and loss of coordination in the arms and legs. They may have other complications, such as vision and hearing impairment, dysarthria, scoliosis, diabetes, and heart disease. The study will explore the impact of this chronic progressive illness on transitional life events, such as career choice and marriage, and the role of family members and health care providers-particularly genetic counselors-in helping patients progress through these events. Patients with Friedreich's ataxia who are 18 years of age or older may be eligible for this study. Those enrolled will participate in a 45- to 60-minute interview by phone or in person, in which they will be asked questions about important changes in their lives and their past experiences with health care providers. The interview will be audiotaped.

OBJECTIVE: To measure the tricarboxylic acid (TCA) cycle rate in the dentate nucleus in a group of control subjects and subjects with Friedreich's Ataxia (FRDA). HYPOTHESIS: The TCA cycle rate will be lower in FRDA subjects than in controls APPROACH: The investigators will infuse carbon-13 (13C) labeled glucose and measure the rate of 13C label incorporation from glucose to glutamate in the brain using in vivo magnetic resonance spectroscopy.

Friedreich's ataxia (FA) is the most frequent recessive genetic ataxia with an estimated prevalence of 1/50 000. The first symptoms appear around the age of 10 years with a progressive course and the need for an armchair 10- 15 years after the first symptoms. More rarely the disease can present with a late onset (after the age of 25) with a picture characterized by spastic paraparesis and slower progression ("LOFA" for "Late Onset Friedreich Ataxia" or VLOFA for "Very Late Appearance of Friedreich's ataxia "). AF is caused in 96% of cases by an expansion of GAAN triplets (N> 100 repeats) located in intron 1 of the FXN gene, present on the two alleles, and, in the rest of the cases, by an associated expansion a point mutation or a deletion in trans. During molecular diagnostics, it is not uncommon to find the presence of interruptions within the GAA expansion. This results in the absence and / or the shift of peak (s) within the chromatogram. To date, only the partial correlation between the size of the expansion and the age of onset of Friedreich's ataxia has been established. In particular, very atypical forms of AF with a late onset (after the age of 25) are in particular explained by the low number of repetitions in the expansion, typically between 100 and 500 repetitions. However, the presence of an interruption could stabilize the size of the expansion and, therefore, be mainly associated with expansions of small sizes and therefore with a late onset of the disease. The objective of this study is therefore to analyse and caracterize the presence and the type of interruptions of the GAA expansions in a group of patients with FA ; this data will be correlated with the age at onset of FA.

The aim of this study is to obtain an early biomarker of amyotrophic lateral sclerosis and Friedreich's Ataxia which allows to diagnose the disease in an initial stage and to follow up the patient with optic coherence tomography, a fast, non-invasive and comfortable method