Project description:Genome-wide gene expression analysis on tibialis anterior muscle from 2-month-old nebulin SH3 domain deleted (Neb∆SH3) mice compared to wildtype. Total RNA was obtained from biological triplicates of tibialis anterior muscle from 2-month-old nebulin SH3 domain deleted (Neb∆SH3) mice compared to wildtype.
Project description:Nebulin is a giant filamentous protein that is coextensive with the actin filaments of the skeletal muscle sarcomere. Nebulin mutations are the main cause of nemaline myopathy (NEM), with typical NEM adult patients having low expression of nebulin, yet the roles of nebulin in adult muscle remain poorly understood. To establish nebulin’s functional roles in adult muscle we performed studies on a novel conditional nebulin KO (Neb cKO) mouse model in which nebulin deletion was driven by the muscle creatine kinase (MCK) promotor. Neb cKO mice are born with high nebulin levels in their skeletal muscle but within weeks after birth nebulin expression rapidly falls to barely detectable levels Surprisingly, a large fraction of the mice survives to adulthood with low nebulin levels (<5% of control), contain nemaline rods, and undergo fiber-type switching towards oxidative types. These microarrays investigate the changes in gene expression when nebulin is deficient. Two skeletal muscle groups were studied: Quadriceps (which is markedly smaller in the Neb cKO mice relative to control) and Soleus (which is not significantly smaller in the Neb cKO relative to control). Six biological replicates for each muscle group were selected; all are age-matched males.
Project description:Nebulin is a giant filamentous protein that is coextensive with the actin filaments of the skeletal muscle sarcomere. Nebulin mutations are the main cause of nemaline myopathy (NEM), with typical NEM adult patients having low expression of nebulin, yet the roles of nebulin in adult muscle remain poorly understood. To establish nebulin’s functional roles in adult muscle we performed studies on a novel conditional nebulin KO (Neb cKO) mouse model in which nebulin deletion was driven by the muscle creatine kinase (MCK) promotor. Neb cKO mice are born with high nebulin levels in their skeletal muscle but within weeks after birth nebulin expression rapidly falls to barely detectable levels Surprisingly, a large fraction of the mice survives to adulthood with low nebulin levels (<5% of control), contain nemaline rods, and undergo fiber-type switching towards oxidative types. These microarrays investigate the changes in gene expression when nebulin is deficient.
Project description:samples from mouse Skeletal Muscle, analysis different expression profiling<br>HDAC4:Sciatic nerve transection model was prepared after injection of HDAC4-shRNA lentivirus into the tibialis anterior muscle of mice. 14 days later, tibialis anterior muscle was obtained. DenSciatic nerve transection model was prepared after injection of empty vector virus into the tibialis anterior muscle of mice. 14 days later, tibialis anterior muscle was obtained. N: The empty vector virus was injected into muscles from the sham group. 14 days later, tibialis anterior muscle was obtained.
Project description:Utilizing glycerol and cardiotoxin (CTX) injections in the tibialis anterior muscles of M. musculus provides models of skeletal muscle damages followed by skeletal muscle regeneration. In particular, glycerol-induced muscle regeneration is known to be associated with ectopic adipogenesis. We characterized genome-wide expression profiles of tibialis anterior muscles from wild-type mice injured by either glycerol or CTX injection. Our goal was to detect gene expression changes during the time course of glycerol-induced and CTX-induced muscle regeneration models, that can lead to ectopic adipocyte accumulation. Tibialis anterior muscle of 12 week old wildtype C57BL/6J male mice injected i.m with either glycerol or CTX were collected 3, 7, 14 or 21 days after injection. 6 biological replicates were used for each time points. Please note that a few replicate samples did not pass QC test, thus, were removed from the submission. Unchallenged tibialis anterior muscles from a group of 5 wildtype C57BL/6J mice were also as a control. Total RNA was extracted, QCed and hybridized to Affymetrix microarrays.
Project description:Intramuscular injection of glycerol (Gly) has been reported to lead to skeletal muscle regeneration and ectopic fat deposition. We utilized glycerol injections in the tibialis anterior muscles to investigate the effects of melatonin on skeletal muscle regeneration and intramuscular fat infiltration. We characterized genome-wide expression profiles of tibialis anterior muscles from wild-type mice injured by glycerol injection following melatonin intervention. Mice that were treated with melatonin exhibited improved muscle regeneration and reduced intramuscular fat deposition, which were associated with enhanced myogenesis, remodeled lipid metabolism and reduced immune cell infiltration.
Project description:Utilizing glycerol and cardiotoxin (CTX) injections in the tibialis anterior muscles of M. musculus provides models of skeletal muscle damages followed by skeletal muscle regeneration. In particular, glycerol-induced muscle regeneration is known to be associated with ectopic adipogenesis. We characterized genome-wide expression profiles of tibialis anterior muscles from wild-type mice injured by either glycerol or CTX injection. Our goal was to detect gene expression changes during the time course of glycerol-induced and CTX-induced muscle regeneration models, that can lead to ectopic adipocyte accumulation.
Project description:Transcript data from tibialis anterior muscle from male muscle-specific Coactivator-Associated Arginine Methyltransferase 1 (Carm1 ) knockout mice (Carm1 skm-/- ) and wild-type mice (Carm1 skm+/+) generated by using the Cre-loxP system (on a C57BL6J/129 background) with HSA-Cre mice (from Jackson laboratories). We used RNA-Seq to detail the effects of muscle-specific loss of Carm1 on the global program of gene expression in tibialis anterior muscle.
Project description:To determine the effect of the deletion of the trancriptional repressor Hypermethylated in cancer 1 (Hic1) on quiescence, adult mesenchymal progenitors (MPs) were isolated from skeletal muscle of both wild type mice and those conditionally deleted for Hic1 and profiled by RNA sequencing. Comparison to MPs activated by using a muscle injury model of the tibialis anterior muscle revealed similar pathways affected under both conditions, highlighting the role for Hic1 in maintaining the quiescent state of MPs