Rattus norvegicus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA141399 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Right ventricular heart failure (RVF) associated with pulmonary hypertension (PH) is characterized by a distinct gene expression pattern when compared with functional compensatory hypertrophy. Carvedilol treatment after RVF has been established reduces right ventricle (RV) hypertrophy and improves the RV function. In addition, carvedilol treatment has been shown to alter the gene expression of select genes. We sought to identify, on a genome-wide basis, the effect of carvedilol on gene expression. RVF was induced in male Sprague-Dawley rats by the combination of VEGF-receptor blockade and chronic hypoxia; thereafter, one group was treated with carvedilol. RNA was isolated from the RV and subjected to microarray analysis. A prediction analysis of the carvedilol-treated RVs showed that carvedilol treated RVs most resembled in their expression pattern the RVF pattern. However, an analysis beyond the boundaries of the prediction set revealed a small set of genes associated with carvedilol reversal of RVF. Pathway analysis of this set of genes revealed expression changes of genes involved in cardiac hypertrophy, mitochondrial dysfunction, protein ubiquitination, and sphingolipid metabolism. Genes encoding proteins in the cardiac hypertrophy and protein ubiquitination pathways were downregulated in the RV by carvedilol, while genes encoding proteins in the mitochondrial dysfunction and sphingolipid metabolism pathways were upregulated by carvedilol.
2013-05-06 | GSE42579 | GEO
Project description:The thalamus may be the critical brain area involved in sensory gating and the relay of respiratory mechanical information to the cerebral cortex for the conscious awareness of breathing. We hypothesized that respiratory mechanical stimuli in the form of tracheal occlusions would modulate the gene expression profile of the thalamus. Specifically, it was reasoned that conditioning to the respiratory loading would induce a state change in the medial thalamus consistent with a change in sensory gating and the activation of molecular pathways associated with learning and memory. In addition, respiratory loading is stressful and thus should elicit changes in gene expressions related to stress, anxiety, and depression. Rats were instrumented with inflatable tracheal cuffs. Following surgical recovery, they underwent ten days (5 days/week) of transient tracheal occlusion conditioning. On day 10, the animals were sacrificed and the brains removed. The medial thalamus was dissected and microarray analysis of gene expression performed. Tracheal obstruction conditioning modulated a total of 661 genes (p < 0.05, log2 fold change ≥ 0.58), 250 genes were down-regulated and 411 up-regulated. There was a significant down-regulation of GAD1, GAD2 and HTR1A, HTR2A genes. CCK, PRKCG, mGluR4, and KCJN9 genes were significantly up-regulated. Some of these genes have been associated with anxiety and depression, while others have been shown to play a role in switching between tonic and burst firing modes in the thalamus and thus may be involved in gating of the respiratory stimuli. Furthermore, gene ontology and pathway analysis showed a significant modulation of learning and memory pathways. These results support the hypothesis that the medial thalamus is involved in the respiratory sensory neural pathway due to the state change of its gene expression profile following repeated tracheal occlusions. Four experimental animals that received tracheal occlusions and four surgical control animals were used. A reference design was used to compare all samples.
2010-11-05 | E-GEOD-25152 | biostudies-arrayexpress
Project description:Effects of muscle regeneration after injury on overloading-induced hypertrophy
| PRJNA314967 | ENA
Project description:The effect of intermittent transient tracheal occlusion (ITTO) on gene expression was compared in the diaphragm and parasternal intercostals. We hypothesized that genes responsible for protein metabolism, myogenic activation, neuromuscular transmission, and inflammatory modulation would be altered in animals exposed to this rodent model of respiratory load compensation rehabilitation. Eight adult male Sprague-Dawley rats underwent placement of a tracheal occluder cuff and were divided into ITTO (n=4) or SHAM (n=4) treatment groups. Animals received 10 days of their assigned treatments. The day following the last treatment session, the animals were euthanized and the diaphragm and parasternals extracted. Messenger RNA was profiled with microarray analysis (Amadid: 028279, Agilent Technologies, Palo Alto, CA). Results were further analyzed with immunofluorescent examination of cross-sectional area and with quantitative reverse transcriptase polymerase chain reaction on a subset of genes exhibiting differential expression. The cross-sectional area of type IIx/b fibers was larger in the muscles of ITTO-trained animals. Microarray analysis identified 650 genes in the diaphragm and 1,181 genes in the intercostals that were differentially expressed between the groups (p<.01). In both muscles, biological processes for cell adhesion and chemical stimulus for the detection of olfaction biological processes were over-expressed. Additionally, we found significant differential expression of the g-protein signaling pathway and protein-amino acid phosphorylation in the intercostals. The results provide insight into neuromuscular plasticity associated with respiratory load compensation rehabilitation. Four experimental animals that received tracheal occlusions and four surgical control animals were used. Intercostal and diaphragm muscles were excised and analyzed separately.
2012-03-26 | E-GEOD-29574 | biostudies-arrayexpress
Project description: Not available
| S-EPMC9277659 | biostudies-literature
Project description:The thalamus may be the critical brain area involved in sensory gating and the relay of respiratory mechanical information to the cerebral cortex for the conscious awareness of breathing. We hypothesized that respiratory mechanical stimuli in the form of tracheal occlusions would modulate the gene expression profile of the thalamus. Specifically, it was reasoned that conditioning to the respiratory loading would induce a state change in the medial thalamus consistent with a change in sensory gating and the activation of molecular pathways associated with learning and memory. In addition, respiratory loading is stressful and thus should elicit changes in gene expressions related to stress, anxiety, and depression. Rats were instrumented with inflatable tracheal cuffs. Following surgical recovery, they underwent ten days (5 days/week) of transient tracheal occlusion conditioning. On day 10, the animals were sacrificed and the brains removed. The medial thalamus was dissected and microarray analysis of gene expression performed. Tracheal obstruction conditioning modulated a total of 661 genes (p < 0.05, log2 fold change ≥ 0.58), 250 genes were down-regulated and 411 up-regulated. There was a significant down-regulation of GAD1, GAD2 and HTR1A, HTR2A genes. CCK, PRKCG, mGluR4, and KCJN9 genes were significantly up-regulated. Some of these genes have been associated with anxiety and depression, while others have been shown to play a role in switching between tonic and burst firing modes in the thalamus and thus may be involved in gating of the respiratory stimuli. Furthermore, gene ontology and pathway analysis showed a significant modulation of learning and memory pathways. These results support the hypothesis that the medial thalamus is involved in the respiratory sensory neural pathway due to the state change of its gene expression profile following repeated tracheal occlusions.
2010-11-05 | GSE25152 | GEO
Project description:miRNA-99 family diverges physiological cardiac hypertrophy to pathological cardiac hypertrophy
| PRJNA297403 | ENA
Project description:Title: Aging-associated changes in microRNA expression profile of internal anal sphincter smooth muscle: Role of microRNA-133a
| PRJNA315564 | ENA
