Cited by 54Muscle Physiology and DisordersAdipose Tissue and MetabolismPeroxisome Proliferator-Activated Receptors

Myotube formation is affected by adipogenic lineage cells in a cell-to-Cell contact-independent manner

Takegahara, Yuki, Yamanouchi, Keitaro, Nakamura, Katsuyuki, Nakano, Shin-ichi, Nishihara, Masugi·2014·Experimental Cell Research

Abstract

Intramuscular adipose tissue (IMAT) formation is observed in some pathological conditions such as Duchenne muscular dystrophy (DMD) and sarcopenia. Several studies have suggested that IMAT formation is not only negatively correlated with skeletal muscle mass but also causes decreased muscle contraction in sarcopenia. In the present study, we examined w hether adipocytes affect myogenesis. For this purpose, skeletal muscle progenitor cells were transfected with siRNA of PPARγ (siPPARγ) in an attempt to inhibit adipogenesis. Myosin heavy chain (MHC)-positive myotube formation was promoted in cells transfected with siPPARγ compared to that of cells transfected with control siRNA. To determine whether direct cell-to-cell contact between adipocytes and myoblasts is a prerequisite for adipocytes to affect myogenesis, skeletal muscle progenitor cells were cocultured with pre- or mature adipocytes in a Transwell coculture system. MHC-positive myotube formation was inhibited when skeletal muscle progenitor cells were cocultured with mature adipocytes, but was promoted when they were cocultured with preadipocytes. Similar effects were observed when pre- or mature adipocyte-conditioned medium was used. These results indicate that preadipocytes play an important role in maintaining skeletal muscle mass by promoting myogenesis; once differentiated, the resulting mature adipocytes negatively affect myogenesis, leading to the muscle deterioration observed in skeletal muscle pathologies.

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Crossref · 10.1016/j.yexcr.2014.03.021

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Authors
Takegahara, Y., Yamanouchi, K., Nakamura, K., Nakano, S.-I., & Nishihara, M.
Affiliations
The University of Tokyo (JP)
Corresponding author
Yamanouchi, Keitaro
Venue
Experimental Cell Research
Publisher
Elsevier BV
Published
2014-05
Volume
324
Issue
1
Pages
105-114
ISSN
0014-4827 (ISSN-L)
OpenAlex
W2066125811
Cited by
53
References
39
Citations by year
2026: 3 · 2025: 3 · 2024: 9 · 2023: 5 · 2022: 1 · 2021: 12 · 2020: 4 · 2019: 4 · 2018: 4 · 2017: 2 · 2016: 3 · 2015: 3
FWCI
1.09
Type
journal article
Language
en
Open access
closed
Locations
  • Experimental Cell Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (23228004, 25292185)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
Keywords
intramuscular fat, myotube formation, myogenesis, adipocytes, preadipocytes, PPARγ, skeletal muscle progenitor cells, cell-cell contact, Duchenne muscular dystrophy, sarcopenia, myosin heavy chain, conditioned medium, skeletal muscle mass
MeSH terms
Animals, Cell Communication, Cells, Cultured, Male, Stem Cells, Rats, Wistar, Adipocytes, Muscle Fibers, Skeletal, Coculture Techniques, Cell Lineage, Muscle Development, RNA, Small Interfering, PPAR gamma, Adipogenesis, Rats

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