Blog Archives

Congenital myasthenic syndromes (CMS) are a group of inherited disorders that arise from impaired signal transmission at the neuromuscular synapse. They are characterized by fatigable muscle weakness. This is a heterogeneous group of disorders with 15 different genes implicated in the development of the disease. Using whole-exome sequencing the authors of the present study identified … [Read more]

The molecular basis underlying the clinical variability in symptomatic Duchenne muscular dystrophy (DMD) carriers are still to be precised. This article describes 26 cases of early symptomatic DMD carriers followed in the French neuromuscular network. Clinical presentation, muscular histological analysis and type of gene mutation, as well as X-chromosome inactivation (XCI) patterns using DNA extracted … [Read more]

Dystroglycanopathies are a clinically and genetically diverse group of recessively inherited conditions ranging from the most severe of the congenital muscular dystrophies, Walker-Warburg syndrome, to mild forms of adult-onset limb-girdle muscular dystrophy. Their hallmark is a reduction in the functional glycosylation of α-dystroglycan, which can be detected in muscle biopsies. An important part of this … [Read more]

Edison Pharmaceuticals has started a phase 2B study, which will investigate new treatments for Friedreich’s ataxia. The trial is entitled Safety and Efficacy Study of EPI-743 on Visual Function in Patients with Friedreich’s Ataxia. It is placebo-controlled and will last six months, before an extension phase begins where subjects will receive EPI-743. Those contributing to … [Read more]

Researchers from the Institute of Myology recently demonstrated the remarkable efficiency of self-complementary (sc) AAV9 vectors for central nervous system (CNS) gene transfer following intravenous delivery in mice and larger animals. In this article, the same researchers investigated whether gene delivery to motor neurons (MNs) could also be achieved via intramuscular (i.m.) scAAV9 injection and … [Read more]

Hereditary motor and sensory disorders of the peripheral nerve form one of the most common groups of human genetic diseases collectively called Charcot-Marie-Tooth (CMT) neuropathy. Using linkage analysis in a three-generation kindred, the authors of this study mapped a new locus for X-linked dominant CMT to chromosome Xp22.11. A microsatellite scan of the X chromosome … [Read more]

Pontocerebellar hypoplasia with spinal muscular atrophy, also known as PCH1, is a group of autosomal recessive disorders characterized by generalized muscle weakness and global developmental delay commonly resulting in early death. Gene defects had been discovered only in single patients until the recent identification of EXOSC3 mutations in several families with relatively mild course of … [Read more]

Duchenne muscular dystrophy (DMD) is a severe disorder characterised by progressive muscle wasting, respiratory and cardiac impairments, and premature death. No treatment exists so far, and the identification of active substances to fight DMD is urgently needed. In this study, the authors have revealed that tamoxifen, a drug used to treat oestrogen-dependent breast cancer, caused … [Read more]

Spinal muscular atrophy (SMA) is among the most common genetic neurological diseases that cause infant mortality. Induced pluripotent stem cells (iPSCs) generated from skin fibroblasts from SMA patients and genetically corrected have been proposed to be useful for autologous cell therapy. In this study, the authors generated iPSCs from SMA patients (SMA-iPSCs) using nonviral, nonintegrating … [Read more]

This prospective longitudinal observational study carried out across 17 neuromuscular centres in the UK study aimed to assess the current use of glucocorticoids (GCs) in Duchenne muscular dystrophy (DMD) and compare the benefits and the adverse events of daily versus intermittent prednisolone regimens. Three hundred and sixty boys aged 3-15 years with confirmed DMD were … [Read more]