Myology research highlights
RSS feedLaunch of the MitoGether website, a reference for genetic mitochondrial diseases
To celebrate the World Mitochondrial Disease Week (September 15th to 21st), the MitoGether consortium, comprising 12 patient associations and their families including AFM-TĂ©lĂ©thon, is launching a reference website. It aims to be the leading resource on mitochondrial genetic diseases, providing expert information on research, diagnosis, medical care and treatment for these diseases, which are associated … [Read more]
Tadalafil and sildenafil have beneficial effects in patients with primary mitochondrial diseases
Following the identification of a patient with Kearns-Sayre syndrome who reported significant clinical improvements while taking tadalafil, a Hungarian-American research team studied the efficacy of this molecule and sildenafil, either of which was administered to six patients with primary mitochondrial diseases (MELAS, Kearns-Sayre syndrome, etc.) off-label. Analysis of patient fibroblasts incubated with tadalafil or sildenafil … [Read more]
An inflammatory factor in Charcot-Marie-Tooth disease
Two French publications suggest that an inflammatory mechanism may be involved in certain forms of Charcot-Marie-Tooth disease (CMT), which are generally considered to be exclusively genetically determined. Four patients with CMT 1A followed up at two reference centres developed Guillain-BarrĂ© syndrome, which progressed favourably overall. The high frequency of this association (4 cases in 5 … [Read more]
Only part of the D4Z4 region is necessary for epigenetic repression of DUX4
Facioscapulohumeral muscular dystrophy (FSHD) is caused by the abnormal and delayed expression of a transcription factor called DUX4, which has a deleterious effect on adult muscle fibers. American and Dutch researchers have precisely characterized the D4Z4 region where the DUX4 gene is located: several fragments of the region of interest (D4Z4) were then studied in … [Read more]
Towards a better understanding and management of SORD-related neuropathy
Biallelic mutations in the SORD (sorbitol dehydrogenase) gene cause neuropathy that can present as a purely motor form (distal hereditary motor neuropathy, dHMN) or as axonal Charcot-Marie-Tooth disease with muscle and sensory involvement (CMT 2). An international publication analysed data from 144 patients with SORD-related neuropathy (two-thirds with CMT 2 and one-third with dHMN). It … [Read more]
Large deletions of the NEB gene in distal myopathy
An international consortium of researchers, including two French scientists, studied possible correlations between genotype and phenotype in the context of myopathies linked to the NEB gene encoding nebulin: the triplicated part of the gene (exons 82 to 105) was studied in particular, 35 families were genotyped using different methods (NGS – whole exomes and genomes, … [Read more]
Challenges remain in the design of registries for limb-girdle muscular dystrophies
A study conducted in part by researchers at Henri Mondor Hospital in Paris reports several persistent difficulties in the design and use of registries for patients with limb-girdle muscular dystrophy (LGMD). In particular, they highlight: variability in the design of the ten registries published in the scientific literature, which makes data interoperability difficult; the limited … [Read more]
A broad genotype range for the TNNC2 gene
French researchers report a case of neonatal hypotonia that was found to be related to a pathological sequence variant in the TNNC2 gene encoding type C troponin: this gene was already known to cause early-onset myopathy; in a pair of siblings, the first died in the neonatal period and the second was the subject of … [Read more]
Improvement in cardiac and motor function with gene therapy in infantile-onset Pompe disease
Four infants with Pompe disease received an intravenous injection of GC301, a gene therapy that delivers a codon-optimized gene encoding human acid alpha-glucosidase (GAA) carried by an adeno-associated viral vector serotype 9 (AAV9). After 52 weeks of observation, cardiac measurements, such as left ventricular ejection fraction, improved in three of the infants. Their Hammersmith Infant … [Read more]
UK recommendations to improve orthopedic care in DMD
A group of British experts has formulated recommendations, approved by the British Society for Children’s Orthopaedic Surgery, aimed at harmonizing and improving orthopedic care for children and young adults with Duchenne muscular dystrophy (DMD). Non-urgent care should be provided in specialized centers, but fractures can be treated by local trauma units if sufficient medical and … [Read more]
