Differential expression of caveolins and myosin heavy chains in response to forced exercise in rats = 흰쥐의 강제운동 효과에 대한 caveolin과 myosin heavy chain의 유전자 발현 양상

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Title
Differential expression of caveolins and myosin heavy chains in response to forced exercise in rats = 흰쥐의 강제운동 효과에 대한 caveolin과 myosin heavy chain의 유전자 발현 양상
Author(s)
S Park; Y Hong; Youngjeon Lee; J Won; Kyu Tae Chang; Y Hong
Bibliographic Citation
Laboratory Animal Research, vol. 28, no. 1, pp. 1-9
Publication Year
2012
Abstract
Exercise training can improve strength and lead to adaptations in the skeletal muscle and nervous systems. Skeletal muscles can develop into two types: fast and slow, depending on the expression pattern of myosin heavy chain (MHC) isoforms. Previous studies reported that exercise altered the distribution of muscle fiber types. It is not currently known what changes in the expression of caveolins and types of muscle fiber occur in response to the intensity of exercise. This study determined the changes in expression of caveolins and MHC type after forced exercise in muscular and non-muscular tissues in rats. A control (Con) group to which forced exercise was not applied and an exercise (Ex) group to which forced exercise was applied. Forced exercise, using a treadmill, was introduced at a speed of 25 m/min for 30 min, 3 times/day (07:00, 15:00, 23:00). Homogenized tissues were applied to extract of total RNA for further gene analysis. The expression of caveolin-3 and MHC2a in the gastrocnemius muscle of female rats significantly increased in the Ex group compared with the Con group (P<0.05). Furthermore, in the gastrocnemius muscle of male rats, the expression of MHC2x was significantly different between the two groups (P<0.05). There was an increased expression in caveolin-3 and a slightly decreased expression in TGFβ-1 in muscular tissues implicating caveolin-3 influences the expression of MHC isoforms and TGFβ-1 expression. Eventually, it implicates that caveolin-3 has positive regulatory function in muscle atrophy induced by neural dysfunction with spinal cord injury or stroke.
Keyword
Forced exercisecaveolinsmyosin heavy chainTGFβ-1
ISSN
1738-6055
Publisher
South Korea
DOI
http://dx.doi.org/10.5625/lar.2012.28.1.1
Type
Article
Appears in Collections:
Ochang Branch Institute > Division of Bioinfrastructure > National Primate Research Center > 1. Journal Articles
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