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Comparative analysis of gene expression in C57BL/6J and DBA/2J aging lungs.

ABSTRACT: 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. More specifically, (1) Aging DBA/2J mice compared to aging C57BL/6 mice are known to be accelerated in their lung physiology and morphometry; (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. Keywords: comparative expression profiling

ORGANISM(S): Mus musculus

PROVIDER: GSE6591 | GEO | 2007/08/31

SECONDARY ACCESSION(S): PRJNA98903

REPOSITORIES: GEO

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Transcription profiling of mouse aging lung from two strains C57BL/6J and DBA/2J

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

Decreased mRNA expression of malonyl-CoA decarboxylase emerges from an inborn error-like defect in the Mlycd gene of DBA/2J mice

Project description:Mlycd encodes malonyl-CoA decarboxylase (MCD), which is an enzyme that localizes in the cytosolic, mitochondrial, and peroxisomal compartments and catalyzes the conversion of malonyl-CoA into acetyl-CoA. Malonyl-CoA can be converted into malonylcarnitine (C3DC). Patients with an autosomal recessive defect of MCD and MCD KO mice have pronounced elevations of C3DC. Analysis of plasma C3DC levels in the BxD genetic reference population revealed increased levels in BxD strains that harbor the DBA/2J haplotype at the site of the Mlycd gene. RNA sequencing was performed on two samples of DBA/2J mouse livers and two C57BL/6J mouse livers. Decreased expression of Mlycd gene as well as intronic reads in intron 2 were observed in DBA/2J livers. Long-read sequecing of DBA/2J livers in the Mlycd region confirmed an intracisternal A-particle (IAP) retrotransposon in intron 2 of the DBA/2J Mlycd sequence. To confirm the causal nature of the variant, DBA/2J mice with and without the C57BL/6J variant of Mlycd spliced in were tested for products of MCD enzymatic activity, and the C57BL/6J variant was able to rescue the phenotype seen in the DBA/2J mice.

2024-10-26 | GSE186973 | GEO

Comparative analysis of gene expression in A/J CB versus DBA/2J

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

Alcohol and fear conditioning produce strain-specific changes in the dorsal hippocampal transcriptome of adolescent C57BL/6J and DBA/2J mice

Project description:Adolescent sensitivity to alcohol is predictive of later alcohol use and is influenced by genetic background. Data from our laboratory suggested that adolescent C57BL/6J and DBA/2J inbred mice differed in susceptibility to dorsal hippocampus-dependent contextual fear learning deficits after acute alcohol exposure. To investigate the biological underpinnings of this strain difference, we examined dorsal hippocampus gene expression via RNA-sequencing after alcohol and/or fear conditioning across male and female C57BL/6J and DBA/2J adolescents. Strains exhibited dramatic differences in dorsal hippocampal gene expression. Specifically, C57BL/6J and DBA/2J strains differed in 3526 transcripts in males and 2675 transcripts in females. We identified pathways likely to be involved in mediating alcohol’s effects on learning, including networks associated with Chrna7 and Fmr1. These findings provide insight into the mechanisms underlying strain differences in alcohol’s effects on learning and suggest that different biological networks are recruited for learning based on genetics, sex, and alcohol exposure.

2024-08-21 | GSE269129 | GEO

Genome wide DNA methylation profiling of whole blood samples from C57BL/6 and DBA/2J healthy mice

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

Mus musculus strain:DBA/2J & C57BL/6J

Project description:Structural variation study of DBA/2J and C57BL/6J mice

| PRJNA41995 | ENA

Expression profiling of F2 progenies from C57BL/6J x DBA/2J

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

Microarray Analysis of Retinal Gene Expression in the DBA/2J Model of Glaucoma

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

2005-11-04 | GSE3554 | GEO

Hepatic expression data between C57BL/6J and DBA/2J mice

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

Novel aspects of the transcriptional stress response in the paraventricular nucleus of the mouse strains DBA/2J and C57BL/6J

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

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