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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of mouse lung tissue among both sexes and three different strains(A/J, C57BL/6, DBA)

ABSTRACT: A comparison of lung tissue among both sexes and three different strains(A/J, C57BL/6, DBA) of mouse

ORGANISM(S): Mus musculus

SUBMITTER: The Laboratory

PROVIDER: E-TIGR-96 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Transcription profiling of mouse lung tissue among both sexes and three different strains(A/J, C57BL/6, DBA)

Project description:A comparison of lung tissue among both sexes and three different strains(A/J, C57BL/6, DBA) of mouse

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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.

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Profiling of gene expression in lung tissue in C57Bl/6 and DBA/2 mouse strains following exposure to carbon nanotubes

Project description:Carbon nanotubes (CNTs) are fibrous particulates made up of elemental carbon and a novel nanomaterial known for its variety of industrial applications. It has been shown that lung exposure to CNTs may cause adverse effects inclunding lung inflammation and remodeling in experimental models. We investigated the impact of genetic background on the development of adverse outcomes by comparing several common inbred mouse strains and found that C57Bl/6 and DBA/2 strains were polarized in their sensitivity to adverse changes at 4 weeks following an exposure to 4 mg/kg CNT. Here we compare underlying gene expression profiles which may inform the understanding of lung biology underpinning genetic susceptibility to adverse outcomes following environmental or occupational exposure to CNTs.

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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.

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