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Bi J, Jing H, Zhou C, Gao P, Han F, Li G, Zhang S. Regulation of skeletal myogenesis in C2C12 cells through modulation of Pax7, MyoD, and myogenin via different low-frequency electromagnetic field energies. Technol Health Care 2022; 30:371-382. [PMID: 35124612 PMCID: PMC9028610 DOI: 10.3233/thc-thc228034] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND: A low-frequency electromagnetic field (LF-EMF) exerts important biological effects on the human body. OBJECTIVE: We previously studied the immunity and atrophy of gastrocnemius muscles in rats with spinal cord injuries and found that LF-EMF with a magnetic flux density of 1.5 mT exerted excellent therapeutic and preventive effects on reducing myotubes and increasing spatium intermusculare. However, the effects of LF-EMF on all stages of skeletal myogenesis, such as activation, proliferation, differentiation, and fusion of satellite cells to myotubes as stimulated by myogenic regulatoryfactors (MRFs), have not been fully elucidated. METHODS: This study investigated the optimal LF-EMF magnetic flux density that exerted maximal effects on all stages of C2C12 cell skeletal myogenesis as well as its impact on regulatory MRFs. RESULTS: The results showed that an LF-EMF with a magnetic flux density of 2.0 mT could activate C2C12 cells and upregulate the proliferation-promoting transcription factor PAX7. On the other hand, 1.5 mT EMF could upregulate the expression of MyoD and myogenin. CONCLUSION: LF-EMF could prevent the disappearance of myotubes, with different magnetic flux densities of LF-EMF exerting independent and positive effects on skeletal myogenesis such as satellite cell activation and proliferation, muscle cell differentiation, and myocyte fusion.
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Affiliation(s)
- Jiaqi Bi
- Harbin Children’s Hospital, Harbin, Heilongjiang, China
- Emergency Department, SongBei Hospital of The Fourth Hospital Affiliated of Harbin Medical University, Harbin, Heilongjiang, China
- Harbin Children’s Hospital, Harbin, Heilongjiang, China
| | - Hong Jing
- Harbin Children’s Hospital, Harbin, Heilongjiang, China
- Harbin Children’s Hospital, Harbin, Heilongjiang, China
| | - ChenLiang Zhou
- Emergency Department, SongBei Hospital of The Fourth Hospital Affiliated of Harbin Medical University, Harbin, Heilongjiang, China
| | - Peng Gao
- The First Department of General Surgery, Harbin Children’s Hospital, Harbin, Heilongjiang, China
| | - Fujun Han
- Emergency Department, SongBei Hospital of The Fourth Hospital Affiliated of Harbin Medical University, Harbin, Heilongjiang, China
| | - Gang Li
- The Second Department of Orthopedics, The First Hospital of Yichun, Yichun, Heilongjiang, China
| | - Shiwei Zhang
- Harbin Children’s Hospital, Harbin, Heilongjiang, China
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