Myofiber Satellite Association
Myofiber Satellite Association - Related Videos
11:57
Isolation and Culture of Individual Myofibers and their Satellite Cells from Adult Skeletal Muscle
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Cited by 173 •
2013
Isolation and culture of myofibers is the gold standard in vitro system to study the transition of satellite cells through quiescence, activation and differentiation. Importantly, the single myofiber culture system preserves the myofiber/stem cell association, which is an essential component of the muscle stem cell niche.
03:53
Myofiber Isolation: A Technique to Obtain Single Myofibers from Harvested Mouse Extensor Digitorum Longus (EDL) Muscle
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2025
This video demonstrates the isolation of single myofibres from harvested murine Extensor Digitorum Longus (EDL) muscle. The isolated myofibres can be cultured to study myofiber-associated muscle stem cell activity.
08:12
In Vitro Differentiation of Mature Myofibers for Live Imaging
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Cited by 38 •
2017
Muscle cells are among the most complex eukaryotic cells. We present a protocol for the in vitro differentiation of highly mature myofibers that allows for genetic manipulation and clear imaging during all developmental stages.
07:52
DNA Electroporation, Isolation and Imaging of Myofibers
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Cited by 30 •
2015
This protocol utilizes electroporation to introduce and express fluorescently labeled proteins in mouse muscle fibers. Following recovery after electroporation, fibers are isolated. Individual fibers are then imaged using high resolution confocal microscopy to visualize muscle structure.
05:58
Analysis of Embryonic and Larval Zebrafish Skeletal Myofibers from Dissociated Preparations
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Cited by 21 •
2013
Zebrafish are an emerging system for modeling human disorders of the skeletal muscle. We describe a fast and efficient method to isolate skeletal muscle myofibers from embryonic and larval zebrafish. This method yields a high-density myofiber preparation suitable for study of single skeletal muscle fiber morphology, protein subcellular localization, and muscle physiology.
FAQs
The niche between the myofiber sarcolemma and basal lamina does more than position satellite cells. Local signals in this restricted space help keep them quiescent, meaning present but not actively proliferating. This arrangement preserves a reserve of muscle stem cells while allowing the tissue to respond rapidly when injury or mechanical stress changes the surrounding environment.
Activation changes satellite-cell behavior in stages: cells leave quiescence, proliferate, and differentiate into myoblasts. These myoblasts can then fuse with existing fibers or contribute to newly forming fibers. The sequence links a local response at the myofiber surface to broader outcomes, including muscle repair and the structural adaptation of skeletal muscle.
Satellite cells and myoblasts represent different stages in the regenerative response. Satellite cells are the resident stem-cell population maintained in the niche, whereas myoblasts arise after activation, proliferation, and differentiation. This distinction helps researchers track whether a muscle response reflects preservation of the stem-cell reserve or progression toward fiber formation.
Following the cellular sequence from quiescence through activation, proliferation, differentiation, and fusion helps connect satellite-cell behavior with tissue-level outcomes. Those outcomes include ongoing muscle maintenance, repair after challenge, and adaptation of skeletal muscle. This framework is useful because it treats regeneration as an interaction between resident cells and myofibers, rather than as an isolated stem-cell process.
The association provides a cellular framework for studying how skeletal muscle responds under different conditions. In exercise research, mechanical stress is a relevant trigger for examining satellite-cell activation and subsequent fiber interactions. In aging research, the relationship offers a way to consider muscle maintenance and repair together, with attention to the local niche that supports satellite-cell function.
Studies centered on this relationship can support work on muscular disorders, exercise responses, and regenerative therapies. The common research focus is how satellite cells are maintained, activated, and incorporated into muscle repair. That focus may help relate cellular behavior to disease or treatment questions without reducing skeletal-muscle regeneration to proliferation alone.