Open Access
Open access
International Journal of Molecular Sciences, volume 25, issue 6, pages 3520

Disruption of Neuromuscular Junction Following Spinal Cord Injury and Motor Neuron Diseases

Publication typeJournal Article
Publication date2024-03-20
scimago Q1
SJR1.179
CiteScore8.1
Impact factor4.9
ISSN16616596, 14220067
Catalysis
Organic Chemistry
Inorganic Chemistry
Physical and Theoretical Chemistry
Computer Science Applications
Spectroscopy
Molecular Biology
General Medicine
Abstract

The neuromuscular junction (NMJ) is a crucial structure that connects the cholinergic motor neurons to the muscle fibers and allows for muscle contraction and movement. Despite the interruption of the supraspinal pathways that occurs in spinal cord injury (SCI), the NMJ, innervated by motor neurons below the injury site, has been found to remain intact. This highlights the importance of studying the NMJ in rodent models of various nervous system disorders, such as amyotrophic lateral sclerosis (ALS), Charcot–Marie–Tooth disease (CMT), spinal muscular atrophy (SMA), and spinal and bulbar muscular atrophy (SBMA). The NMJ is also involved in myasthenic disorders, such as myasthenia gravis (MG), and is vulnerable to neurotoxin damage. Thus, it is important to analyze the integrity of the NMJ in rodent models during the early stages of the disease, as this may allow for a better understanding of the condition and potential treatment options. The spinal cord also plays a crucial role in the functioning of the NMJ, as the junction relays information from the spinal cord to the muscle fibers, and the integrity of the NMJ could be disrupted by SCI. Therefore, it is vital to study SCI and muscle function when studying NMJ disorders. This review discusses the formation and function of the NMJ after SCI and potential interventions that may reverse or improve NMJ dysfunction, such as exercise, nutrition, and trophic factors.

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