Abstract
Satellite cells exist in postnatal muscle tissue and constitute the main source of muscle precursor cells for growth and repair. These cells carry out important roles for skeletal muscle formation postnatally during growth of muscle mass as well as damage-induced regenerative processes. Muscle regeneration supports muscle function in aging and has a role in the functional impairment caused by progressive neuromuscular diseases. Major substances controlling this process are growth factors and extracellular matrix. Myostatin, a member of TGF-β family, was mainly expressed in muscle tissue. Decorin, a member of the small leucine-rich proteoglycan gene family, is composed of a core protein and a dermatan/chondroitin sulfate chain. Recent studies have shown that decorin enhanced the proliferation and differentiation of myogenic cells by suppressing myostatin activity. Thus, decorin appears to be a new molecule in the myostatin signaling pathway and a promising target for treatment of progressive neuromuscular diseases. Therefore, in this study, we examined the localization of decorin as well as myostatin in a muscular dystrophy model in mdx mice and B10 Scott Snells mice as a control to elucidate the differences between decorin and myostatin messages as well as protein distribution. This study revealed increased expression of decorin protein as well as mRNA at the regenerative stage of mdx mice compared to early stages, while only weak expression of decorin was detected in the control mice. Our study contributes to identifying the relationship between decorin and myostatin as well as the development of a therapeutic strategy for progressive neuromuscular diseases.
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Acknowledgements
This study was supported by grants-in-aid for scientific research (19592131: Shinichi Abe) from the Ministry of Education, Culture, Sports, Science and Technology, Japan, by the Foundation of the Japan Medical Association, by the Oral Health Science Center Grant HRC7 (Shinichi Abe) from Tokyo Dental College, and by a “High-Tech Research Center” Project for Private Universities: matching fund subsidy from MEXT (Ministry of Education, Culture, Sports, Science and Technology) of Japan, 2006-2011.
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S. Abe and D. Hirose contributed equally to this work.
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Abe, S., Hirose, D., Kado, S. et al. Increased expression of decorin during the regeneration stage of mdx mouse. Anat Sci Int 84, 305–311 (2009). https://doi.org/10.1007/s12565-009-0039-9
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DOI: https://doi.org/10.1007/s12565-009-0039-9