Journal
FRONTIERS IN PHYSIOLOGY
Volume 12, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fphys.2021.689492
Keywords
myotube; mechanical stretch; biomechanical adaptation; mechanoresponse; skeletal muscle
Categories
Funding
- National Natural Science Foundation of China (NSFC) [11702154]
- China Postdoctoral Science Foundation (CPSF) [2018M642621]
- Qingdao Outstanding Health Professional Development Fund
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Myotubes are mature muscle cells that experience physiological changes when stretched, involving various aspects. Current research focuses on the biomechanical adaptations of myotubes under mechanical stretching conditions, showcasing their adaptability and responses.
Myotubes are mature muscle cells that form the basic structural element of skeletal muscle. When stretching skeletal muscles, myotubes are subjected to passive tension as well. This lead to alterations in myotube cytophysiology, which could be related with muscular biomechanics. During the past decades, much progresses have been made in exploring biomechanical properties of myotubes in vitro. In this review, we integrated the studies focusing on cultured myotubes being mechanically stretched, and classified these studies into several categories: amino acid and glucose uptake, protein turnover, myotube hypertrophy and atrophy, maturation, alignment, secretion of cytokines, cytoskeleton adaption, myotube damage, ion channel activation, and oxidative stress in myotubes. These biomechanical adaptions do not occur independently, but interconnect with each other as part of the systematic mechanoresponse of myotubes. The purpose of this review is to broaden our comprehensions of stretch-induced muscular alterations in cellular and molecular scales, and to point out future challenges and directions in investigating myotube biomechanical manifestations.
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