Improved Human Muscle Biopsy Method To Study Neuromuscular Junction Structure and Functions with Aging.

Autor:	Aubertin-Leheudre M; Département des sciences de l'activité physique, Montreal, QC, Canada.; Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada.; Centre de Recherche, Institut Universitaire de Gériatrie de Montréal, Montreal, QC, Canada., Pion CH; Département des sciences de l'activité physique, Montreal, QC, Canada.; Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada.; Centre de Recherche, Institut Universitaire de Gériatrie de Montréal, Montreal, QC, Canada., Vallée J; Département de neurosciences, Montreal, QC, Canada.; Groupe de recherche sur le système nerveux central, Université de Montréal, Montreal, QC, Canada., Marchand S; Département de neurosciences, Montreal, QC, Canada.; Groupe de recherche sur le système nerveux central, Université de Montréal, Montreal, QC, Canada., Morais JA; McGill University Health Centre, Research Institute and Geriatric Medicine, Faculty of Medicine, McGill University, Montreal, Canada., Bélanger M; Département des sciences de l'activité physique, Montreal, QC, Canada.; Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada., Robitaille R; Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada.; Département de neurosciences, Montreal, QC, Canada.; Groupe de recherche sur le système nerveux central, Université de Montréal, Montreal, QC, Canada.
Jazyk:	angličtina
Zdroj:	The journals of gerontology. Series A, Biological sciences and medical sciences [J Gerontol A Biol Sci Med Sci] 2020 Oct 15; Vol. 75 (11), pp. 2098-2102.
DOI:	10.1093/gerona/glz292
Abstrakt:	Reduced mobility and physical independence of elders has emerged as a major clinical and public health priority with extended life expectancy. The impact of the neuromuscular function on muscle activity and properties has emerged as a critical factor influencing the progress and outcome of muscle changes with aging. However, very little is known about the neuromuscular junctions (NMJs) in humans, in part due to technical constraints limiting the access to healthy, fresh neuromuscular tissue. Here, we describe a method, called Biopsy using Electrostimulation for Enhanced NMJ Sampling (BeeNMJs) that improves the outcome of muscle biopsies. We used local cutaneous stimulation to identify the area enriched with NMJs for each participant at the right Vastus lateralis (VL). The needle biopsy was then performed in proximity of that point. The BeeNMJs procedure was safe for the participants. We observed NMJs in 53.3% of biopsies in comparison with only 16.7% using the traditional method. Furthermore, we observed an average of 30.13 NMJs per sample compared to only 2.33 for the traditional method. Importantly, high-quality neuromuscular material was obtained whereby pre-, postsynaptic, and glial elements were routinely labeled, simultaneously with myosin heavy chain type I. The BeeNMJs approach will facilitate studies of NMJs, particularly in human disease or aging process. (© The Author(s) 2019. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
Databáze:	MEDLINE
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