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Pathophysiology and Treatment of Congenital Neuromuscular Disorders

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Pathology, Diagnostics, and Therapeutics".

Deadline for manuscript submissions: 20 January 2026 | Viewed by 1824

Special Issue Editor


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Guest Editor
Department of Cellular and Molecular Medicine, University of Arizona, 1656 East Mabel Street, Tucson, AZ 85724-5217, USA
Interests: nebulin; titin; nemaline myopathy; titinopathy; HMERF; congenital myopathies; sarcomere dynamics; regulation of muscle contraction; myofilament

Special Issue Information

Dear Colleagues,

Over the last few decades, we have made great progress in identifying the genetic cause of congenital neuromuscular disorders. We have also started to understand how some of these mutations result in muscle weakness through their disruption of the physiological neuromuscular system, but much more work remains to be carried out. Furthermore, there are currently no approved therapies targeting the underlying pathological processes that result in muscle weakness and/or muscle smallness in these diseases. This unmet need represents a considerable burden for patients and their families.

With these issues in mind, we are excited to announce a Special Issue of the International Journal of Molecular Science (IJMS) entitled “Pathophysiology and Treatment of Congenital Neuromuscular Disorders”, which will focus on the molecular mechanisms that contribute to the disease phenotype and new innovative therapeutic approaches for congenital neuromuscular disorders. Since IJMS is a journal of molecular science, pure clinical or model studies will not be suitable for our journal. However, clinical or pure model submissions with biomolecular experiments are welcomed.

Dr. Johan Lindqvist
Guest Editor

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Keywords

  • nemaline myopathy
  • hereditary neuromuscular disorder
  • genetic mutations
  • pathogenesis
  • pathophysiology
  • therapy
  • myofilament dysfunction
  • congenital neuromuscular disorders
  • congenital muscular dystrophy
  • spinal muscular atrophy
  • Duchenne muscular dystrophy

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Published Papers (1 paper)

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Research

26 pages, 6423 KiB  
Article
Iron Accumulation and Lipid Peroxidation in Cellular Models of Nemaline Myopathies
by Alejandra López-Cabrera, Rocío Piñero-Pérez, Mónica Álvarez-Córdoba, Paula Cilleros-Holgado, David Gómez-Fernández, Diana Reche-López, Ana Romero-González, José Manuel Romero-Domínguez, Mario de la Mata, Rocío M. de Pablos, Susana González-Granero, José Manuel García-Verdugo and José A. Sánchez-Alcázar
Int. J. Mol. Sci. 2025, 26(4), 1434; https://doi.org/10.3390/ijms26041434 - 8 Feb 2025
Viewed by 796
Abstract
One of the most prevalent types of congenital myopathy is nemaline myopathy (NM), which is recognized by histopathological examination of muscle fibers for the presence of “nemaline bodies” (rods). Mutations in the actin alpha 1 (ACTA1) and nebulin (NEB) [...] Read more.
One of the most prevalent types of congenital myopathy is nemaline myopathy (NM), which is recognized by histopathological examination of muscle fibers for the presence of “nemaline bodies” (rods). Mutations in the actin alpha 1 (ACTA1) and nebulin (NEB) genes result in the most prevalent types of NM. Muscle weakness and hypotonia are the main clinical characteristics of this disease. Unfortunately, the pathogenetic mechanisms are still unknown, and there is no cure. In previous work, we showed that actin filament polymerization defects in patient-derived fibroblasts were associated with mitochondrial dysfunction. In this manuscript, we examined the pathophysiological consequences of mitochondrial dysfunction in patient-derived fibroblasts. We analyzed iron and lipofuscin accumulation and lipid peroxidation both at the cellular and mitochondrial level. We found that fibroblasts derived from patients harboring ACTA1 and NEB mutations showed intracellular iron and lipofuscin accumulation, increased lipid peroxidation, and altered expression levels of proteins involved in iron metabolism. Furthermore, we showed that actin polymerization inhibition in control cells recapitulates the main pathological alterations of mutant nemaline cells. Our results indicate that mitochondrial dysfunction is associated with iron metabolism dysregulation, leading to iron/lipofuscin accumulation and increased lipid peroxidation. Full article
(This article belongs to the Special Issue Pathophysiology and Treatment of Congenital Neuromuscular Disorders)
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