Regulation of myogenesis and skeletal muscle regeneration: effects of oxygen levels on satellite cell activity

2016 ◽  
Vol 30 (12) ◽  
pp. 3929-3941 ◽  
Author(s):  
Thomas Chaillou1 ◽  
Johanna T. Lanner
Keyword(s):  
Skeletal Muscle ◽  
Satellite Cell ◽  
Muscle Regeneration ◽  
Cell Activity ◽  
Skeletal Muscle Regeneration ◽  
Oxygen Levels ◽  
Satellite Cell Activity

scholarly journals mTOR is necessary for proper satellite cell activity and skeletal muscle regeneration

2015 ◽  
Vol 463 (1-2) ◽  
pp. 102-108 ◽  
Author(s):  
Pengpeng Zhang ◽  
Xinrong Liang ◽  
Tizhong Shan ◽  
Qinyang Jiang ◽  
Changyan Deng ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Satellite Cell ◽  
Muscle Regeneration ◽  
Cell Activity ◽  
Skeletal Muscle Regeneration ◽  
Satellite Cell Activity

scholarly journals PEDF-derived peptide promotes skeletal muscle regeneration through its mitogenic effect on muscle progenitor cells

2015 ◽  
Vol 309 (3) ◽  
pp. C159-C168 ◽  
Author(s):  
Tsung-Chuan Ho ◽  
Yi-Pin Chiang ◽  
Chih-Kuang Chuang ◽  
Show-Li Chen ◽  
Jui-Wen Hsieh ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Cell Proliferation ◽  
Cyclin D1 ◽  
Satellite Cell ◽  
Muscle Regeneration ◽  
Muscle Fibers ◽  
Skeletal Muscle Regeneration ◽  
Satellite Cell Proliferation

In response injury, intrinsic repair mechanisms are activated in skeletal muscle to replace the damaged muscle fibers with new muscle fibers. The regeneration process starts with the proliferation of satellite cells to give rise to myoblasts, which subsequently differentiate terminally into myofibers. Here, we investigated the promotion effect of pigment epithelial-derived factor (PEDF) on muscle regeneration. We report that PEDF and a synthetic PEDF-derived short peptide (PSP; residues Ser93-Leu112) induce satellite cell proliferation in vitro and promote muscle regeneration in vivo. Extensively, soleus muscle necrosis was induced in rats by bupivacaine, and an injectable alginate gel was used to release the PSP in the injured muscle. PSP delivery was found to stimulate satellite cell proliferation in damaged muscle and enhance the growth of regenerating myofibers, with complete regeneration of normal muscle mass by 2 wk. In cell culture, PEDF/PSP stimulated C2C12 myoblast proliferation, together with a rise in cyclin D1 expression. PEDF induced the phosphorylation of ERK1/2, Akt, and STAT3 in C2C12 myoblasts. Blocking the activity of ERK, Akt, or STAT3 with pharmacological inhibitors attenuated the effects of PEDF/PSP on the induction of C2C12 cell proliferation and cyclin D1 expression. Moreover, 5-bromo-2′-deoxyuridine pulse-labeling demonstrated that PEDF/PSP stimulated primary rat satellite cell proliferation in myofibers in vitro. In summary, we report for the first time that PSP is capable of promoting the regeneration of skeletal muscle. The signaling mechanism involves the ERK, AKT, and STAT3 pathways. These results show the potential utility of this PEDF peptide for muscle regeneration.

scholarly journals Effects of intramuscular administration of 1α,25(OH)2D3 during skeletal muscle regeneration on regenerative capacity, muscular fibrosis, and angiogenesis

2016 ◽  
Vol 120 (12) ◽  
pp. 1381-1393 ◽  
Author(s):  
Ratchakrit Srikuea ◽  
Muthita Hirunsai
Keyword(s):  
Skeletal Muscle ◽  
Vitamin D ◽  
Protein Synthesis ◽  
Cell Differentiation ◽  
Satellite Cell ◽  
Muscle Regeneration ◽  
Fiber Type ◽  
Fiber Formation ◽  
Skeletal Muscle Regeneration ◽  
Type Composition

The recent discovery of the vitamin D receptor (VDR) in regenerating muscle raises the question regarding the action of vitamin D3 on skeletal muscle regeneration. To investigate the action of vitamin D3 on this process, the tibialis anterior muscle of male C57BL/6 mice (10 wk of age) was injected with 1.2% BaCl2 to induce extensive muscle injury. The bioactive form of vitamin D3 [1α,25(OH)2D3] was administered daily via intramuscular injections during the regenerative phase (days 4-7 postinjury). Physiological and supraphysiological doses of 1α,25(OH)2D3 relative to 1 μg/kg muscle wet weight and mouse body weight were investigated. Muscle samples were collected on day 8 postinjury to examine proteins related to vitamin D3 metabolism (VDR, CYP24A1, and CYP27B1), satellite cell differentiation and regenerative muscle fiber formation [myogenin and embryonic myosin heavy chain (EbMHC)], protein synthesis signaling (Akt, p70 S6K1, 4E-BP1, and myostatin), fiber-type composition (fast and slow MHCs), fibrous formation (vimentin), and angiogenesis (CD31). Administration of 1α,25(OH)2D3 at physiological and supraphysiological doses enhanced VDR expression in regenerative muscle. Moreover, CYP24A1 and vimentin expression was increased, accompanying decreased myogenin and EbMHC expression at the supraphysiological dose. However, there was no change in CYP27B1, Akt, p70 S6K1, 4E-BP1, myostatin, fast and slow MHCs, or CD31 expression at any dose investigated. Taken together, administration of 1α,25(OH)2D3 at a supraphysiological dose decreased satellite cell differentiation, delayed regenerative muscle fiber formation, and increased muscular fibrosis. However, protein synthesis signaling, fiber-type composition, and angiogenesis were not affected by either 1α,25(OH)2D3 administration at a physiological or supraphysiological dose.

scholarly journals Differing Responses of Satellite Cell Activity to Exercise Training in Rat Skeletal Muscle

2009 ◽  
Vol 21 (2) ◽  
pp. 141-145 ◽  
Author(s):  
Shoji Tanaka ◽  
Takuya Miyata ◽  
Tyoichi Fujita ◽  
Ei Kawahara ◽  
Katsuhiko Tachino ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Exercise Training ◽  
Satellite Cell ◽  
Cell Activity ◽  
Rat Skeletal Muscle ◽  
Satellite Cell Activity

scholarly journals HMGB2 regulates satellite-cell-mediated skeletal muscle regeneration through IGF2BP2

2016 ◽  
Vol 129 (22) ◽  
pp. 4305-4316 ◽  
Author(s):  
Xingyu Zhou ◽  
Mingsen Li ◽  
Huaxing Huang ◽  
Keren Chen ◽  
Zhuning Yuan ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Satellite Cell ◽  
Muscle Regeneration ◽  
Skeletal Muscle Regeneration
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