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Molecular Research on Neuromuscular Diseases

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Neurobiology".

Deadline for manuscript submissions: closed (31 January 2023) | Viewed by 4368

Special Issue Editor


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Guest Editor
PAnTher, INRA, École Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (Oniris), Université Bretagne Loire (UBL), F-44307 Nantes, France
Interests: neuroscience

Special Issue Information

Dear Colleagues,

Neuromuscular diseases are devastating disorders whose prevalence rates are estimated from 1 to 10 per 100,000 people. Sometimes manifesting as early as from birth, they have dire consequences on the quality of life and sometimes life expectancy of patients. More than 400 neuromuscular diseases have been reported so far, which are of various origins: genetic, inflammatory, auto immune, etc.

During the last decade, major advances have been achieved in the comprehension of the pathological mechanisms of neuromuscular diseases, especially through the use of animal models and omics technologies. Thanks to an increasing and deeper understanding of these diseases, new therapeutics, sometimes highly innovative (gene therapy, antisense oligonucleotides, etc.) are currently under trial or already benefit some patients.

However, our understanding of the pathophysiology of neuromuscular diseases, notably of molecular mechanisms, is still incomplete and hinders the setup of novel therapeutic strategies. Current proposed treatments are indeed often mildly efficient, alleviating some but not all symptoms. Further research on the molecular basis of these diseases as well as discovery of novel biomarkers is thus critically needed to develop more effective treatments.

This Special Issue aims to gather research papers and reviews on current developments and the most recent advances in molecular research on neuromuscular diseases and will hopefully benefit the scientific and medical neuromuscular community in their endeavors in both research and therapeutics.

Prof. Dr. Marie-Anne Colle
Guest Editor

Manuscript Submission Information

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Keywords

  • neuromuscular disease
  • peripheral nervous system
  • motor neuron
  • neuromuscular junction
  • signaling pathways
  • key molecular players
  • omics
  • molecular biomarkers

Published Papers (2 papers)

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Research

23 pages, 10962 KiB  
Article
Analysis of Dysferlin Direct Interactions with Putative Repair Proteins Links Apoptotic Signaling to Ca2+ Elevation via PDCD6 and FKBP8
by Dennis G. Drescher, Marian J. Drescher, Dakshnamurthy Selvakumar and Neeraja P. Annam
Int. J. Mol. Sci. 2023, 24(5), 4707; https://doi.org/10.3390/ijms24054707 - 28 Feb 2023
Cited by 3 | Viewed by 2012
Abstract
Quantitative surface plasmon resonance (SPR) was utilized to determine binding strength and calcium dependence of direct interactions between dysferlin and proteins likely to mediate skeletal muscle repair, interrupted in limb girdle muscular dystrophy type 2B/R2. Dysferlin canonical C2A (cC2A) and C2F/G domains directly [...] Read more.
Quantitative surface plasmon resonance (SPR) was utilized to determine binding strength and calcium dependence of direct interactions between dysferlin and proteins likely to mediate skeletal muscle repair, interrupted in limb girdle muscular dystrophy type 2B/R2. Dysferlin canonical C2A (cC2A) and C2F/G domains directly interacted with annexin A1, calpain-3, caveolin-3, affixin, AHNAK1, syntaxin-4, and mitsugumin-53, with cC2A the primary target and C2F lesser involved, overall demonstrating positive calcium dependence. Dysferlin C2 pairings alone showed negative calcium dependence in almost all cases. Like otoferlin, dysferlin directly interacted via its carboxy terminus with FKBP8, an anti-apoptotic outer mitochondrial membrane protein, and via its C2DE domain with apoptosis-linked gene (ALG-2/PDCD6), linking anti-apoptosis with apoptosis. Confocal Z-stack immunofluorescence confirmed co-compartmentalization of PDCD6 and FKBP8 at the sarcolemmal membrane. Our evidence supports the hypothesis that prior to injury, dysferlin C2 domains self-interact and give rise to a folded, compact structure as indicated for otoferlin. With elevation of intracellular Ca2+ in injury, dysferlin would unfold and expose the cC2A domain for interaction with annexin A1, calpain-3, mitsugumin 53, affixin, and caveolin-3, and dysferlin would realign from its interactions with PDCD6 at basal calcium levels to interact strongly with FKBP8, an intramolecular rearrangement facilitating membrane repair. Full article
(This article belongs to the Special Issue Molecular Research on Neuromuscular Diseases)
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19 pages, 2738 KiB  
Article
Spinal Irisin Gene Delivery Attenuates Burn Injury-Induced Muscle Atrophy by Promoting Axonal Myelination and Innervation of Neuromuscular Junctions
by Sheng-Hua Wu, I-Cheng Lu, Shih-Ming Yang, Chia-Fang Hsieh, Chee-Yin Chai, Ming-Hong Tai and Shu-Hung Huang
Int. J. Mol. Sci. 2022, 23(24), 15899; https://doi.org/10.3390/ijms232415899 - 14 Dec 2022
Viewed by 2015
Abstract
Muscle loss and weakness after a burn injury are typically the consequences of neuronal dysregulation and metabolic change. Hypermetabolism has been noted to cause muscle atrophy. However, the mechanism underlying the development of burn-induced motor neuropathy and its contribution to muscle atrophy warrant [...] Read more.
Muscle loss and weakness after a burn injury are typically the consequences of neuronal dysregulation and metabolic change. Hypermetabolism has been noted to cause muscle atrophy. However, the mechanism underlying the development of burn-induced motor neuropathy and its contribution to muscle atrophy warrant elucidation. Current therapeutic interventions for burn-induced motor neuropathy demonstrate moderate efficacy and have side effects, which limit their usage. We previously used a third-degree burn injury rodent model and found that irisin—an exercise-induced myokine—exerts a protective effect against burn injury-induced sensory and motor neuropathy by attenuating neuronal damage in the spinal cord. In the current study, spinal irisin gene delivery was noted to attenuate burn injury-induced sciatic nerve demyelination and reduction of neuromuscular junction innervation. Spinal overexpression of irisin leads to myelination rehabilitation and muscular innervation through the modulation of brain-derived neurotrophic factor and glial-cell-line-derived neurotrophic factor expression along the sciatic nerve to the muscle tissues and thereby modulates the Akt/mTOR pathway and metabolic derangement and prevents muscle atrophy. Full article
(This article belongs to the Special Issue Molecular Research on Neuromuscular Diseases)
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