Muscle contractility dysfunction precedes loss of motor unit connectivity in SOD1(G93A) mice

Autor:	Christopher G, Wier, Alexander E, Crum, Anthony B, Reynolds, Chitra C, Iyer, Deepti, Chugh, Marilly S, Palettas, Patrick L, Heilman, David M, Kline, W David, Arnold, Stephen J, Kolb
Rok vydání:	2018
Předmět:	Male Motor Neurons Superoxide Dismutase Amyotrophic Lateral Sclerosis Age Factors Neuromuscular Junction Action Potentials Mice Transgenic Mice Inbred C57BL Disease Models Animal Mice Muscular Diseases Torque Disease Progression Animals Female Longitudinal Studies Muscle Skeletal Muscle Contraction
Zdroj:	Musclenerve. 59(2)
ISSN:	1097-4598
Popis:	Electrophysiological measurements are used in longitudinal clinical studies to provide insight into the progression of amyotrophic lateral sclerosis (ALS) and the relationship between muscle weakness and motor unit (MU) degeneration. Here, we used a similar longitudinal approach in the Cu/Zn superoxide dismutase (SOD1[G93A]) mouse model of ALS.In vivo muscle contractility and MU connectivity assays were assessed longitudinally in SOD1(G93A) and wild type mice from postnatal days 35 to 119.In SOD1(G93A) males, muscle contractility was reduced by day 35 and preceded MU loss. Muscle contractility and motor unit reduction were delayed in SOD1(G93A) females compared with males, but, just as with males, muscle contractility reduction preceded MU loss.The longitudinal contractility and connectivity paradigm employed here provides additional insight into the SOD1(G93A) mouse model and suggests that loss of muscle contractility is an early finding that may precede loss of MUs and motor neuron death. Muscle Nerve 59:254-262, 2019.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=pmid________::98f966f37edb72f951bff8af6b04d2fa https://pubmed.ncbi.nlm.nih.gov/30461038 Zobrazit plný text záznamu Plný text