Skeletal muscle HSP72 and norepinephrine response to static magnetic field in rat.
The present work was undertaken in order to investigate the noradrenergic system and skeletal muscle heat shock protein 72 (HSP72) response to static magnetic field (MF) in male rats. At thermoneutrality (25 degrees C), the exposition of rats 1 hour/day for 5 consecutive days to MF of 128 mT (m tesla) induced an increase in norepinephrine content in gastrocnemius muscle (+25%, p < 0.05) but had no effect at 67 mT (+1%, p > 0.05), indicating a stimulatory effect of sub-acute MF exposure on the noradrenergic system activity. Moreover, exposed rats to MF displayed a non-significant increase of HSP72 levels in gastrocnemius muscles (+29%, p > 0.05). The results indicate that noradrenergic systems in rat's gastrocnemius muscles are affected by MF exposure. Interestingly, sub-acute exposure insufficiency increased HSP72 levels in gastrocnemius muscles.
Abdelmelek
H
H
Laboratoire de Physiologie Animale, Faculté des Sciences de Bizerte, Jarzouna, Tunisia. Hafedeh.Abdelmelek@fsb.rnu.tn
Molnar
A
A
Servais
S
S
Cottet-Emard
J M
JM
Pequignot
J M
JM
Favier
R
R
Sakly
M
M
D000818:Animals; D001808:Blood Vessels / Q000294:innervation / Q000502:physiology; D004574:Electromagnetic Fields / Q000009:adverse effects*; D050884:HSP72 Heat-Shock Proteins / Q000378:metabolism / Q000528:radiation effects*; D008297:Male; D018482:Muscle, Skeletal / Q000294:innervation* / Q000378:metabolism / Q000528:radiation effects*; D009638:Norepinephrine / Q000378:metabolism / Q000528:radiation effects*; D011827:Radiation; D051381:Rats; D017208:Rats, Wistar; D013312:Stress, Physiological / Q000378:metabolism / Q000503:physiopathology; D017779:Sympathetic Fibers, Postganglionic / Q000378:metabolism / Q000528:radiation effects*; D013997:Time Factors; D015854:Up-Regulation / Q000502:physiology / Q000528:radiation effects
D050884:HSP72 Heat-Shock Proteins; D009638:Norepinephrine