Document Detail


Age-related changes in rat genioglossus, geniohyoid and masseter muscles.
MedLine Citation:
PMID:  22994799     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVES: The aim of this study was to elucidate age-related changes from adult to middle age in the contractile properties of the masseter, genioglossus and geniohyoid muscles of the rat. MATERIALS AND METHODS: We analysed the expressions of myosin heavy chain (MyHC) mRNAs and proteins as indicators of the contractile properties in these muscles obtained from rats at 6, 12, 18 and 24 months of age using real-time PCR and SDS-PAGE. RESULTS: We found no marked age-related changes in the expressions of MyHC mRNAs and proteins in rat masseter and geniohyoid muscles, suggesting that the biological ageing process does not affect contractile properties in these muscles. However, we found a decrease in the expression of MyHC IIb mRNA with ageing in the rat genioglossus muscle, suggesting that biological ageing process induces at least some fast-to-slow myofibre phenotype transition. CONCLUSION: The biological ageing process from adult to middle age appears to differentially affect different types of craniofacial muscles.
Authors:
Syuhei Kaneko; Ryo-Hei Iida; Takeo Suga; Mitsuhiko Morito; Akira Yamane
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-20
Journal Detail:
Title:  Gerodontology     Volume:  -     ISSN:  1741-2358     ISO Abbreviation:  Gerodontology     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8215850     Medline TA:  Gerodontology     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 The Gerodontology Society and John Wiley & Sons A/S.
Affiliation:
Department of Geriatric Dentistry, School of Dental Medicine, Tsurumi University, Yokohama, Japan.
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