Comparative analysis of gene expression in C57BL/6J and DBA/2J aging lungs.
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE6591 | GEO | 2007/08/31
SECONDARY ACCESSION(S): PRJNA98903
REPOSITORIES: GEO
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Project description:We hypothesize that gene expression in the aging lungs of these two strains of mice are divergent thus contributing to the disparity in the phenotypes.re specifically, (1) Aging DBA/2J mice compared to aging C57BL/6 mice are known to be accelerated in their lung physiology andrphometry; (2) C57BL/6J are known to have longer natural longevity than DBA/2J mice. In order to test these hypotheses at the gene expression level, we utilized microarray analysis to examine transcriptional differences between aging lungs of both strains of mice. Experiment Overall Design: This study utilizes microarray analysis to test these hypotheses. Three sets of lungs were harvested from both strains at each time point (C57BL/6J: 2, 18, AND 26s; DBA/2J: 2 and 18s). RNA was isolated and used for global gene expression profiling (Affymetrixuse 430 2.0 array). Statistically significant gene expression was determined as a minimum 6 counts of 9 pairwise comparisons, minimum 1.5-fold change, and p < 0.05. Further, Absolute | FC - FC SEM | >= 1.5.
2009-04-23 | E-GEOD-6591 | biostudies-arrayexpress
Project description:We hypothesize that gene expression in the CBs of these two strains of mice are divergent thus contributing to the disparity in the phenotypes. More specifically, (1) genes related to CB function are expressed less in the A/J mice compared to DBA/2J mice; (2) gene expression levels of morphogenic and trophic factors of the CB maybe significantly lower in the A/J mice than the DBA/2J mice. In order to test these hypotheses, we utilized microarray analysis to examine transcriptional differences between CBs of both strains of mice. Keywords: comparative expression profiling
2006-12-02 | GSE5313 | GEO
Project description:Aging of mice can be tracked by DNA methylation changes at specific sites in the genome. In this study, we used the Infinium Mouse Methylation BeadChip to compare such epigenetic modifications in C57BL/6 (B6) and DBA/2J (DBA) mice. There were marked differences in age-associated DNA methylation in these commonly used mouse strains. In B6 the age-associated DNA methylation revealed general age-associated hypomethylation with focused hypermethylation at CpG islands, whereas this was hardly observed in DBA mice. The CpGs with highest age-correlation were overlapping in B6 and DBA and included the genes Hsf4, Prima1, Aspa, and Wnt3a. Notably, Hsf4, Prima1 were also top candidates in previous studies based on whole genome deep sequencing approaches. Furthermore, Hsf4, Aspa, and Wnt3a revealed highly significant age-associated DNA methylation in the homologous regions in human. Taken together, age-associated DNA methylation differs between B6 and DBA, but the most prominent regions are conserved, even in humans.
2022-06-21 | GSE200527 | GEO
Project description:Structural variation study of DBA/2J and C57BL/6J mice
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Project description:Expression profiling of a cohort of mice was derived from a standard F2 intercross using two standard inbred strains, C57BL/6J and DBA/2J. In this study, we selected 127 male animals that had been raised on a standard rodent chow diet (Purina Chow from Ralston-Purina Co., St. Louis, MO) for eight weeks and then switched to a high fat diet for sixteen additional weeks. At 20 weeks of age, the mice were euthanized and liver tissues were collected and flash frozen in liquid nitrogen and stored at -80 degrees C prior to RNA isolation. All procedures of housing and treatment of animals were performed in accordance with IACUC regulations.
2011-06-01 | GSE16886 | GEO
Project description:Purpose: The DBA/2J mouse is a model for secondary angle-closure glaucoma due to iris atrophy and pigment dispersion, which ultimately leads to increased intraocular pressure (IOP). We sought to correlate changes in retinal gene expression with glaucoma-like pathology by performing microarray analysis of retinal RNA from DBA/2J mice at 3 months before disease onset, and at 8 months, after IOP elevation. Methods: IOP was monitored monthly in DBA/2J animals by Tono-Pen and animals with normal (3 months) or elevated IOP (8 months) were identified. RNA was prepared from 3 individual retinas at each age, and the RNA was amplified and used to generate biotin-labeled probe for high density mouse Affymetrix arrays (U430.2). A subset of genes was selected for confirmation by quantitative RT-PCR using independent retina samples from DBA/2J animals at 3, 5 and 8 months of age, and compared to retinas from C57BL/6J control animals at 3 and 8 months. Results: There were changes in expression of 68 genes, with 32 genes increasing and 36 genes decreasing at 8 months versus 3 months. Upregulated genes were associated with immune response, glial activation, signaling and gene expression, while down-regulated genes included multiple crystallin genes. Significant changes in 9 upregulated genes and 2 downregulated genes were confirmed by quantitative RT-PCR, with some showing changes in expression by 5 months. Conclusions: DBA/2J retina shows evidence for glial activation and an immune-related response following IOP elevation, similar to what has been reported following acute elevation of IOP in other models. Keywords: retina, glaucoma, DBA/2J, elevated intraocular pressure
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Project description:C57BL/6J (B6) and DBA/2J (D2) mice were fed a high-fat/high-cholesterol diet in order to investigate the responses to that diet over time and their underlying genetic factors. We observed distinctly diverse responses between B6 and D2 mice, including dynamic distribution of cholesterol in serum and bile, hepatic apoptosis and dynamic formation of gallstones and atherosclerosis. Hepatic microarray analysis revealed distinctly different gene expression patterns in functional pathway groups including lipid metabolism, oxidative stress, immune/inflammation response and apoptosis, which might account for the different responses.This might provide us not only new insights into gallstones formation and atherosclerosis, but also opportunities to identify candidate genes for high-fat/high-cholesterol related diseases. C57BL/6J (B6) and DBA/2J (D2) mice were fed a high-fat/high-cholesterol diet in 0,1,4 12,21 weeks,respectively. Liver tissues of mice from each time-point were removed for RNA extraction. Equal amounts of RNA samples from five mice of each strain at each time-point were pooled and then used to generate biotinylated cRNA targets for Affymetrix GeneChip Mouse Genome 430 2.0 Array.
2014-12-14 | E-GEOD-17810 | biostudies-arrayexpress
Project description:The pivotal role of stress in the precipitation of psychiatric diseases is generally accepted. To further elucidate the underlying molecular mechanisms, gene networks and signalling cascades, we investigated the impact of an acute stressor, forced swimming, on the gene expression profile in the hypothalamic paraventricular nucleus (PVN). We performed this study in C57BL/6J and DBA/2J mice, which are known to differ in their reaction to stress. Mice were exposed to forced swimming as stressor, brains were dissected 4h and 8h after stress, both from stressed and unstressed animals, and the RNA profiles from the PVN were evaluated by microarray analysis. Keywords: time course, treatment response, strain differences RNAs from unstressed animals (basal) were compared to RNAs from stressed animals (either 4h or 8h after stress) for both mouse strains (DBA/2J and C57BL/6). In addition, RNA from the two strains were compared under basal conditions. Technical replicates: 10 for each time point, including dye-swap each with 5 replicates
2010-10-20 | E-GEOD-20877 | biostudies-arrayexpress
Project description:Glaucoma is a common ocular disorder that is a leading cause of blindness worldwide. It is characterized by the dysfunction and loss of retinal ganglion cells (RGCs). Although many studies have implicated various molecules in glaucoma, no mechanism has been shown to be responsible for the earliest detectable damage to RGCs and their axons in the optic nerve. Here, we show that the leukocyte transendothelial migration pathway is activated in the optic nerve head at the earliest stages of disease in an inherited mouse model of glaucoma. This resulted in proinflammatory monocytes entering the optic nerve prior to detectable neuronal damage. A 1-time x-ray treatment prevented monocyte entry and subsequent glaucomatous damage. A single x-ray treatment of an individual eye in young mice provided that eye with long-term protection from glaucoma but had no effect on the contralateral eye. Localized radiation treatment prevented detectable neuronal damage and dysfunction in treated eyes, despite the continued presence of other glaucomatous stresses and signaling pathways. Injection of endothelin-2, a damaging mediator produced by the monocytes, into irradiated eyes, combined with the other glaucomatous stresses, restored neural damage with a topography characteristic of glaucoma. Together, these data support a model of glaucomatous damage involving monocyte entry into the optic nerve. Genome-wide assessment of gene expression changes was performed in DBA/2J-Gpnmb+, DBA/2J mice and irradiated DBA/2J mice at 8.5 and 10.5 months of age.
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2014-12-01 | GSE52818 | GEO