Friedreich's ataxia: past, present and future.
1Laboratoire de Neurologie experimentale, Universite Libre de Bruxeles, Route de Lennik 808, Campus Erasme, 1070 Bruxelles, Belgium. daniele.marmolino@ulb.ac.be
Brain Research Reviews
|May 10, 2011
Summary
Friedreich
Area of Science:
- Neurogenetics
- Mitochondrial Biology
- Rare Diseases
Background:
- Friedreich's ataxia (FRDA) is an inherited neurodegenerative disorder.
- It is caused by large GAA repeat expansions in the FXN gene, leading to reduced frataxin protein.
- Frataxin deficiency disrupts iron metabolism and causes oxidative stress.
Purpose of the Study:
- To review recent findings on FRDA pathogenesis and frataxin function.
- To discuss novel therapeutic strategies targeting frataxin levels.
- To explore current cellular and animal models for FRDA research.
Main Methods:
- Literature review of FRDA pathogenesis, frataxin function, and therapeutic interventions.
- Analysis of cellular and animal models for understanding disease mechanisms.
- Discussion of controversial aspects in FRDA research.
Main Results:
- Frataxin deficiency impairs iron-sulfur cluster biogenesis and enhances oxidative stress.
- Cellular and animal models show that restoring frataxin function can reverse FRDA phenotypes.
- Experimental drugs aimed at increasing frataxin are promising therapeutic candidates.
Conclusions:
- Targeting frataxin levels represents a viable therapeutic strategy for Friedreich's ataxia.
- Further research into FRDA pathogenesis and novel treatments is crucial.
- Developing effective therapies requires continued investigation of cellular and animal models.
Related Concept Videos
01:24Parkinson Disease ll: Pathophysiology
Parkinson disease (PD) is a progressive neurodegenerative disorder primarily affecting movement, with additional non-motor features. Its pathophysiology involves complex interactions among genetic susceptibility, environmental exposures, and cellular dysfunction, including dopaminergic neuron loss, protein aggregation, and mitochondrial impairment.Selective NeurodegenerationA key feature is the degeneration of dopaminergic neurons in the substantia nigra pars compacta, leading to reduced...
01:21Huntington Disease l: Introduction
Huntington disease or HD is a progressive, fatal neurodegenerative disorder inherited in an autosomal dominant pattern.PathophysiologyIt is caused by expansion of the CAG trinucleotide repeat in the HTT gene on chromosome 4 (4p16.3), producing an abnormal huntingtin protein with an expanded polyglutamine tract. This misfolded protein disrupts cellular function, leading to neuronal death. Normal alleles have ≤26 repeats, 27–35 are intermediate (risk of expansion), 36–39 show reduced penetrance,...
01:15Parkinson's Disease: Overview
Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is to...
01:22Myasthenia Gravis ll: Pathophysiology
The disease process of myasthenia gravis begins at the neuromuscular junction, where antibodies attack key proteins needed for muscle activation. This immune reaction weakens signal transmission, leading to the characteristic muscle fatigue and weakness that define the condition.Immune-Mediated DamageIn most individuals, antibodies target acetylcholine receptors (AChRs) on the postsynaptic membrane of muscle cells. By blocking acetylcholine binding, these antibodies prevent the nerve signal...
02:59Animal Mitochondrial Genetics
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
01:24Parkinson Disease l: Introduction
Parkinson’s disease is a chronic, progressive neurodegenerative disorder that primarily affects movement. It is characterized by motor symptoms such as resting tremors, muscle rigidity, bradykinesia (slowness of movement), and postural instability. Patients may notice hand tremors at rest, stiffness during movement, or a shuffling gait. In addition to motor features, non-motor symptoms include sleep disturbances, mood and behavioral changes, constipation, and cognitive impairment, all of which...