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| Content Provider | Springer Nature Link |
|---|---|
| Author | Zau, Nadège Gailly, Philippe |
| Copyright Year | 2013 |
| Abstract | Adult skeletal muscle can regenerate in response to muscle damage. This ability is conferred by the presence of myogenic stem cells called satellite cells. In response to stimuli such as injury or exercise, these cells become activated and express myogenic regulatory factors (MRFs), i.e., transcription factors of the myogenic lineage including Myf5, MyoD, myogenin, and Mrf4 to proliferate and differentiate into myofibers. The MRF family of proteins controls the transcription of important muscle-specific proteins such as myosin heavy chain and muscle creatine kinase. Different growth factors are secreted during muscle repair among which insulin-like growth factors (IGFs) are the only ones that promote both muscle cell proliferation and differentiation and that play a key role in muscle regeneration and hypertrophy. Different isoforms of IGFs are expressed during muscle repair: IGF-IEa, IGF-IEb, or IGF-IEc (also known as mechano growth factor, MGF) and IGF-II. MGF is expressed first and is observed in satellite cells and in proliferating myoblasts whereas IGF-Ia and IGF-II expression occurs at the state of muscle fiber formation. Interestingly, several studies report the induction of MRFs in response to IGFs stimulation. Inversely, IGFs expression may also be regulated by MRFs. Various mechanisms are proposed to support these interactions. In this review, we describe the general process of muscle hypertrophy and regeneration and decipher the interactions between the two groups of factors involved in the process. |
| Starting Page | 4117 |
| Ending Page | 4130 |
| Page Count | 14 |
| File Format | |
| ISSN | 1420682X |
| Journal | Cellular and Molecular Life Sciences |
| Volume Number | 70 |
| Issue Number | 21 |
| e-ISSN | 14209071 |
| Language | English |
| Publisher | Springer Basel |
| Publisher Date | 2013-04-04 |
| Publisher Place | Basel |
| Access Restriction | Subscribed |
| Subject Keyword | Regeneration IGF MyoD Myogenin Myogenesis Hypertrophy Cell Biology Biomedicine general Life Sciences Biochemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Molecular Biology Molecular Medicine Pharmacology Cellular and Molecular Neuroscience |
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