Project description:Global gene expression patterns were determined from microarray results on day 1, 3, 5, 7, 10 and 14 during plantaris muscle regrowth following two weeks of hind limb suspension in young adult mice (5 months).
Project description:Global gene expression patterns were determined from microarray results on day 1, 3, 5, 7, 10 and 14 during plantaris muscle regrowth following two weeks of hind limb suspension in young adult mice (5 months). For each time point, one Affymetrix chip (Mouse Gene 1.0 ST) was used with 100 ng of total RNA derived from a pooled sample of the left plantaris muscle from six animals.
Project description:The goal of this study was to identify changes in muscle gene expression that may contribute to loss of adaptability of old muscle. Muscle atrophy was induced in young adult (6-month) and old (32-month) male Brown Norway/F344 rats by two weeks of hind limb suspension (HS) and soleus muscles were analyzed by cDNA microarrays. We conclude that a cold shock response may be part of a compensatory mechanism in muscles undergoing atrophy to preserve remaining muscle mass and that RBM3 may be a therapeutic target to prevent muscle loss.
Project description:Aging animals undergo a variety of changes in molecular processes. Among these, the cellular circadian clock has been shown to change as animals age. Moreover, there is evidence that also core circadian clock proteins could influence the ageing behavior of vertebrates. To investigate the interplay between aging and the circadian clock, we studied circadian mRNA expression in skeletal muscles from young (8 weeks) and aged (80 weeks) mice. In order to detect differences in circadian patterns, we used microarray-based transcriptome-wide time series of mRNA expression, containing 16 independent measurements for both young and aged animals. Each individual time point consists of total RNA from hind limb skeletal muscles from 3 different animals. Young and aged mice where entrained to 12 hr/12 hr light-dark conditions. From these mice, hind limb skeletal muscles were extracted at different times of day, in order to measure circadian mRNA expression patterns.
Project description:Rodent hind limb unloading was used as a model for reduced muscle activity and eventual atrophy. After a 10 day period of unloading, mice in this study were “reloaded” for 3 days and regained use of their hind limbs. We report the application of Next-generation sequencing (NGS) technology for high-throughput profiling of mRNA in soleus muscle of adult (6 mo) and aged (22-24 mo) mice. Our goal was to determine the effects of hind limb unloading and reloading on mRNA profiles in soleus muscle and compare between adult and aged mice. We find that there are distinct response in the profile of fatty acid oxidation, TCA cycle, ETC oxidative phosphorylation gene expression patterns in response to unloading and reloading. The repsonses are generally simialr between young and old mice.
Project description:Ten-week-old C57BL/6J mice were subjected to unilateral hind limb ischemia-reperfusion (I/R) injury by postural suspension method for 4 hours, and then treated with aspirin anti-inflammatory group and peptide functionalized hydrogel drug. RNA-seq analysis was then performed.
Project description:The aim of the study was to determine the protein composition of cornified claws of the western clawed frog (Xenopus tropicalis) in comparison to clawless toe tips and back skin. Cornified claws develop on toes I, II, III of the hind limbs, which we refer to as hind limb inner (HI) toes. Toes IV, V of the hind limbs, here referred to as hind limb outer (HO) toes lack claws. Proteins were prepared from HI toe tips including claws, HO toe tips and back skin (BSK) of frogs each (F1, F2, F3) and subjected to proteomic analysis.
Project description:Loss of branched-chain α-keto acid dehydrogenase kinase (BCKDK) increases branched-chain amino acid (BCAA) oxidation by disinhibiting BCKDH. We previously observed that in Bckdk knockout (KO) mice circulating BCAA levels are significantly reduced, negatively affecting neurological function, motor behavior, and male fertility. This work comparatively assessed how systemic loss of Bckdk modulates the transcriptome in testes and skeletal muscle under control diet feeding. Freely-fed adult male C57BL6/J mice and Bckdk KO mice on the C57BL6/J genetic background were euthanized by decapitation at the mid-point of the light cycle and tissues were quickly harvested and frozen in liquid nitrogen. Total RNA was extracted from frozen testes and hind-limb muscle (gastrocnemius and plantaris combined).
Project description:Global gene expression patterns were determined from microarray results on day 1, 3, 5, 7, 10 and 14 during plantaris muscle hypertrophy induced by synergist ablation in young adult mice (5 months). For each time point, two Affymetrix chips (Mouse Gene 1.0 ST) were used with 100 ng of total RNA derived from a pooled sample of either the right or left plantaris muscles from six animals.
Project description:Aged mice (22-24 mo) underwent Progressive weighted wheel running (PoWeR) for 8 weeks. RNA-seq on soleus and plantaris muscles was conducted on untrained and PoWeR trained mice. RNA from soleus and plantaris of young mice (4-6 months old) was used as a comparator (Englund et al. 2021 Function)
