Project description:The effect of acetyl-L-carnitine (ALCAR) supplementation to hindlimb suspended rats has been analyzed in order to test whether this would promote the differentiation towards an oxidative phenotype of muscle fibers in soleus muscle and prevent the transformation of this slow tonic muscle towards a glycolytic, low-oxidative phenotype due to unloading condition. 3 month-old rats were daily supplemented with ALCAR concomitantly with hindlimb suspension. Validated microarray analysis for a broad range of muscle-relevant processes delineated an ALCAR-induced adjustment of the expression profile. In particular, transcript elevations of factors underlying oxidative metabolism in mitochondria and protein turnover by ribosomal and proteasomal components as well as an adaptation of voltage-gated ion channel expression were identified as an ALCAR response in soleus muscle. Keywords: ALCAR effect
Project description:This study surveyed expression of genes which might be involved in regulating the satellite cell response to non-damaging exercise. Low density cDNA arrays were used to survey expression of selected cytokines and growth factors in the soleus muscle following 60 minutes of level running. Keywords: Exercise response; pre versus 24-hr post
Project description:1 year-old male 129/SV mice. Animals were acclimatized to housing in single cages for one week. Soleus muscle was harvested, total RNA isolated and subjected to transcript profiling with custom microarrays with custom-designed ATLASTM cDNA nylon filter as described (Dapp, C., Schmutz, S., Hoppeler, H. & Fluck, M. (2004) Physiol Genomics 20, 97-107). Keywords: Transcriptome
Project description:We used phosphoproteomic profiling of slow-twitch (soleus, SOL) and fast-twitch (biceps femoris, BF) muscle to identify differences between these muscle types.
Project description:Gene expression changes induced by acute skeletal muscle unloading, which leads to physiological changes including muscle atrophy, fibre-type switching, and loss of ability to transition between lipid and glucose as energy source (metabolic inflexibility), was investigated by hind-limb suspension (HLS) treatment of Male ICR mice (28–32 g body wt; Harlan, Indianapolis, IN). Agilent Whole Mouse Genome Oligo Microarrays were utilised to examine the effects of HLS on mRNA expression profiles of the soleus muscle and the gastrocnemius muscle in the hindlimbs of freely ambulating control and 24h HLS treated mice. Keywords: treatment vs control, tissue type comparison
Project description:1 year-old male 129/SV mice. Animals were acclimatized to housing in single cages for one week. Soleus muscle was harvested, total RNA isolated and subjected to transcript profiling with custom microarrays with custom-designed ATLASTM cDNA nylon filter as described (Dapp, C., Schmutz, S., Hoppeler, H. & Fluck, M. (2004) Physiol Genomics 20, 97-107). Keywords: Transcriptome Seven replicas