[Effects of high frequency vibration on expression of myosin heavy chain (MHC) in intrafusal and extrafusal fibers in soleus muscles of tail-suspended rats].
OBJECTIVE
To study the effects of high frequency vibration on expression of myosin heavy chain (MHC) in intrafusal and extrafusal fibers in soleus muscles of tail-suspended rats.


METHODS
Weightlessness was simulated by tail suspension of female rats. Using immunohistochemistry technique, changes of expression of MHC in intrafusal and extrafusal fibers of soleus muscles were detected.


RESULTS
Expression of fast MHC in intrafusal and extrafusal fibers of soleus muscles increased during 7 d of simulated weightlessness, whereas during 7 d of tail suspension plus high frequency vibration, these changes were not detected.


CONCLUSIONS
High frequency vibration can counteract the changes in expression of MHC in intrafusal and extrafusal fibers of rats soleus under muscles of rats in simulated weightlessness situation.
Yang
Wei
W
Department of Physiology, Xi'an Jiaotong University, Shanxi Xi'an, China.
Fan
Xiao-li
XL
Wu
Su-di
SD
Song
Xin-ai
XA
D000818:Animals; D005260:Female; D019417:Hindlimb Suspension; D007150:Immunohistochemistry; D018656:Muscle Fibers, Fast-Twitch / Q000378:metabolism*; D018482:Muscle, Skeletal / Q000378:metabolism*; D018995:Myosin Heavy Chains / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D014732:Vibration; D018474:Weightlessness Simulation
D018995:Myosin Heavy Chains