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FORCE platform overcomes barriers of oligonucleotide delivery to muscle and corrects myotonic dystrophy features in preclinical models.
Commun Med (Lond)
January 2025
Dyne Therapeutics Inc, Waltham, MA, USA.
Background: We developed the FORCE platform to overcome limitations of oligonucleotide delivery to muscle and enable their applicability to neuromuscular disorders. The platform consists of an antigen-binding fragment, highly specific for the human transferrin receptor 1 (TfR1), conjugated to an oligonucleotide via a cleavable valine-citrulline linker. Myotonic dystrophy type 1 (DM1) is a neuromuscular disorder caused by expanded CUG triplets in the DMPK RNA, which sequester splicing proteins in the nucleus, lead to spliceopathy, and drive disease progression.
View Article and Find Full Text PDF[Breathing disorders during sleep in patients with dystrophic myotonia].
Zh Nevrol Psikhiatr Im S S Korsakova
December 2024
Republican Scientific and Practical Center of Neurology and Neurosurgery, Minsk, Belarus.
Objective: To analyze the results of nocturnal breathing parameters during sleep based on nocturnal pulse oximetry and to study of characteristics of external respiration in genetically confirmed patients with dystrophic myotonia (DM).
Material And Methods: The subjects of the study were patients with genetically confirmed DM types 1 and 2 who were hospitalized in the neurological departments of the Republican Scientific and Practical Center for Neurology and Neurosurgery. The clinical picture of the disease, comorbidities, sleep questionnaires, laboratory tests, overnight pulse oximetry and spirometry were performed and analyzed.
Case report: Multiple approach analysis in a case of clinically assessed myotonia congenita.
Front Genet
December 2024
Dino Ferrari Center, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.
Myotonia congenita, both in a dominant (Thomsen disease) and recessive form (Becker disease), is caused by molecular defects in that encodes the major skeletal muscle chloride channel, ClC-1. This channel is important for the normal repolarization of muscle action potentials and consequent relaxation of the muscle, and its dysfunction leads to impaired muscle relaxation after voluntary or evoked contraction and muscle stiffness. More than 300 pathogenic variants have been found in association with congenital myotonia, inherited as recessive or dominant traits (with complete or incomplete penetrance).
View Article and Find Full Text PDFSevere Adult-Onset Non-Dystrophic Myotonia With Apnea and Laryngospasm Due to Digenic Inheritance of and Variants: A Case Report.
Neurol Genet
February 2025
Department of Neurology and.
Objectives: To report a case of adult-onset non-dystrophic myotonia complicated by recurrent episodes of laryngospasm.
Methods: The patient is a 35-year-old man who was admitted to our hospital for recurrent episodes of apnea requiring endotracheal intubation with mechanical ventilation. He underwent extensive evaluation, including EMG, laryngoscopy, muscle biopsy, and genetic testing, which revealed a diagnosis of non-dystrophic myotonia.
Myotonic dystrophies: an update on clinical features, molecular mechanisms, management, and gene therapy.
Neurol Sci
December 2024
Neurology Unit, IRCCS Fondazione Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
Myotonic dystrophies (DM) encompass a group of complex genetic disorders characterized by progressive muscle weakness with myotonia and multisystemic involvement. The aim of our paper is to synthesize key findings and advancements in the understanding of DM, and to underline the multidisciplinary approach to DM, emphasizing the importance of genetic counseling, comprehensive clinical care, and symptom management. We discuss the genetic basis of DM, emphasizing the role of repeat expansions in disease pathogenesis, as well as cellular and animal models utilized for studying DM mechanisms and testing potential therapies.
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