An improved method for culturing myotubes on laminins for the robust clustering of postsynaptic machinery

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Abstract: Motor neurons form specialized synapses with skeletal muscle fibers, called neuromuscular junctions (NMJs). Cultured myotubes are used as a simplified in vitro system to study the postsynaptic specialization of muscles. The stimulation of myotubes with the glycoprotein agrin or laminin-111 induces the clustering of postsynaptic machinery that contains acetylcholine receptors (AChRs). When myotubes are grown on laminin-coated surfaces, AChR clusters undergo developmental remodeling to form topologically complex structures that resemble mature NMJs. Needing further exploration are the molecular processes that govern AChR cluster assembly and its developmental maturation. Here, we describe an improved protocol for culturing muscle cells to promote the formation of complex AChR clusters. We screened various laminin isoforms and showed that laminin-221 was the most potent for inducing AChR clusters, whereas laminin-121, laminin-211, and laminin-221 afforded the highest percentages of topologically complex assemblies. Human primary myotubes that were formed by myoblasts obtained from patient biopsies also assembled AChR clusters that underwent remodeling in vitro. Collectively, these results demonstrate an advancement of culturing myotubes that can facilitate high-throughput screening for potential therapeutic targets for neuromuscular disorders

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Notes: Scientific reports. - 10, 1 (2020) , 4524, ISSN: 2045-2322

Event: Veröffentlichung

(where): Freiburg

(who): Universität

(when): 2020

Creator: Pęziński, Marcin
Daszczuk, Patrycja
Pradhan, Bhola Shankar
Lochmüller, Hanns
Prószyński, Tomasz J.

DOI: 10.1038/s41598-020-61347-x

URN: urn:nbn:de:bsz:25-freidok-1657623

Rights: Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 14.08.2025, 11:01 AM CEST

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Pęziński, Marcin
Daszczuk, Patrycja
Pradhan, Bhola Shankar
Lochmüller, Hanns
Prószyński, Tomasz J.
Universität

Time of origin

2020

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An improved method for culturing myotubes on laminins for the robust clustering of postsynaptic machinery

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