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Effect of passive stretching on the immobilized soleus muscle fiber morphology BJMBR
Coutinho,E.L.; Gomes,A.R.S.; França,C.N.; Oishi,J.; Salvini,T.F..
The aim of the present study was to determine the effect of stretching applied every 3 days to the soleus muscle immobilized in the shortened position on muscle fiber morphology. Eighteen 16-week-old Wistar rats were used and divided into three groups of 6 animals each: a) the left soleus muscle was immobilized in the shortened position for 3 weeks; b) during immobilization, the soleus was stretched for 40 min every 3 days; c) the non-immobilized soleus was only stretched. Left and right soleus muscles were examined. One portion of the soleus was frozen for histology and muscle fiber area evaluation, while the other portion was used to identify the number and length of serial sarcomeres. Immobilized muscles (group A) showed a significant decrease in weight...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Skeletal muscle; Passive stretch; Muscle immobilization; Sarcomere number; Muscle atrophy; Muscle fiber area.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001200011
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Effects of exercise training on atrophy gene expression in skeletal muscle of mice with chronic allergic lung inflammation BJMBR
Durigan,J.L.Q.; Peviani,S.M.; Russo,T.L.; Silva,A.C.D.; Vieira,R.P.; Martins,M.A.; Carvalho,C.R.F.; Salvini,T.F..
We evaluated the effects of chronic allergic airway inflammation and of treadmill training (12 weeks) of low and moderate intensity on muscle fiber cross-sectional area and mRNA levels of atrogin-1 and MuRF1 in the mouse tibialis anterior muscle. Six 4-month-old male BALB/c mice (28.5 ± 0.8 g) per group were examined: 1) control, non-sensitized and non-trained (C); 2) ovalbumin sensitized (OA, 20 µg per mouse); 3) non-sensitized and trained at 50% maximum speed _ low intensity (PT50%); 4) non-sensitized and trained at 75% maximum speed _ moderate intensity (PT75%); 5) OA-sensitized and trained at 50% (OA+PT50%), 6) OA-sensitized and trained at 75% (OA+PT75%). There was no difference in muscle fiber cross-sectional area among groups and no difference in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Exercise training; Muscle atrophy; Asthma; Gene expression; Mice.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000400005
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Implantation of muscle satellite cells overexpressing myogenin improves denervated muscle atrophy in rats BJMBR
Shen,H.; Lv,Y.; Shen,X.Q.; Xu,J.H.; Lu,H.; Fu,L.C.; Duan,T..
This study evaluated the effect of muscle satellite cells (MSCs) overexpressing myogenin (MyoG) on denervated muscle atrophy. Rat MSCs were isolated and transfected with the MyoG-EGFP plasmid vector GV143. MyoG-transfected MSCs (MTMs) were transplanted into rat gastrocnemius muscles at 1 week after surgical denervation. Controls included injections of untransfected MSCs or the vehicle only. Muscles were harvested and analyzed at 2, 4, and 24 weeks post-transplantation. Immunofluorescence confirmed MyoG overexpression in MTMs. The muscle wet weight ratio was significantly reduced at 2 weeks after MTM injection (67.17±6.79) compared with muscles injected with MSCs (58.83±5.31) or the vehicle (53.00±7.67; t=2.37, P=0.04 and t=3.39, P=0.007, respectively). The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Denervation; Muscle atrophy; Satellite cells; Myogenin; Transplantation; Transfection.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000200609
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Ouabain exacerbates botulinum neurotoxin-induced muscle paralysis via progression of muscle atrophy in mice OAK
Fujikawa, Ryu; Muroi, Yoshikage; Unno, Toshihiro; Ishii, Toshiaki; 室井, 喜景; 石井, 利明.
Botulinum neurotoxin serotype A (BoNT/A) inhibits acetylcholine release at the neuromuscular junction in isolated muscles, and ouabain can partially block its effect. However, it is not clear whether ouabain attenuates BoNT/A-induced neuromuscular paralysis in vivo. In this work, we investigated the effects of ouabain on BoNT/A-induced neuromuscular paralysis in mice. Ouabain was administered to mice intraperitoneally immediately after a single injection of BoNT/A into skeletal muscle. The effects of ouabain on BoNT/A-induced muscle paralysis were assessed by quantitative monitoring of muscle tension and digit abduction via the digit abduction scoring (DAS) assay. A single administration of ouabain significantly prolonged BoNT/A-induced neuromuscular...
Palavras-chave: Ouabain; Botulinum neurotoxin; Muscle atrophy; MAFbx; MuRF-1.
Ano: 2010 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3123
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