Mus musculus
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ABSTRACT:
PROVIDER: PRJNA275329 | ENA |
REPOSITORIES: ENA
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Project description:PURPOSE: To provide a detailed gene expression profile of the normal postnatal mouse cornea. METHODS: Serial analysis of gene expression (SAGE) was performed on postnatal day (PN)9 and adult mouse (6 week) total corneas. The expression of selected genes was analyzed by in situ hybridization. RESULTS: A total of 64,272 PN9 and 62,206 adult tags were sequenced. Mouse corneal transcriptomes are composed of at least 19,544 and 18,509 unique mRNAs, respectively. One third of the unique tags were expressed at both stages, whereas a third was identified exclusively in PN9 or adult corneas. Three hundred thirty-four PN9 and 339 adult tags were enriched more than fivefold over other published nonocular libraries. Abundant transcripts were associated with metabolic functions, redox activities, and barrier integrity. Three members of the Ly-6/uPAR family whose functions are unknown in the cornea constitute more than 1% of the total mRNA. Aquaporin 5, epithelial membrane protein and glutathione-S-transferase (GST) omega-1, and GST alpha-4 mRNAs were preferentially expressed in distinct corneal epithelial layers, providing new markers for stratification. More than 200 tags were differentially expressed, of which 25 mediate transcription. CONCLUSIONS: In addition to providing a detailed profile of expressed genes in the PN9 and mature mouse cornea, the present SAGE data demonstrate dynamic changes in gene expression after eye opening and provide new probes for exploring corneal epithelial cell stratification, development, and function and for exploring the intricate relationship between programmed and environmentally induced gene expression in the cornea. Keywords: other
2004-01-02 | GSE887 | GEO
Project description:Introgressed variants from other species can be an important source of genetic variation because they may arise rapidly, can include multiple mutations on a single haplotype, and have often been pretested by selection in the species of origin. Although introgressed alleles are generally deleterious, several studies have reported introgression as the source of adaptive alleles-including the rodenticide-resistant variant of Vkorc1 that introgressed from Mus spretus into European populations of Mus musculus domesticus. Here, we conducted bidirectional genome scans to characterize introgressed regions into one wild population of M. spretus from Spain and three wild populations of M. m. domesticus from France, Germany, and Iran. Despite the fact that these species show considerable intrinsic postzygotic reproductive isolation, introgression was observed in all individuals, including in the M. musculus reference genome (GRCm38). Mus spretus individuals had a greater proportion of introgression compared with M. m. domesticus, and within M. m. domesticus, the proportion of introgression decreased with geographic distance from the area of sympatry. Introgression was observed on all autosomes for both species, but not on the X-chromosome in M. m. domesticus, consistent with known X-linked hybrid sterility and inviability genes that have been mapped to the M. spretus X-chromosome. Tract lengths were generally short with a few outliers of up to 2.7 Mb. Interestingly, the longest introgressed tracts were in olfactory receptor regions, and introgressed tracts were significantly enriched for olfactory receptor genes in both species, suggesting that introgression may be a source of functional novelty even between species with high barriers to gene flow.
| S-EPMC8784167 | biostudies-literature
Project description:Comparison of gene expression profiles of Pten, Keap1 and Nrf2 knockout mouse livers.
| PRJNA217968 | ENA
Project description:Gene expression profiles of Tet1 knockout (T1KO), Tet2 knockout (T2KO) and Tet1/Tet2 double knockout (DKO) mouse embryonic stem cells.
| PRJNA184026 | ENA
Project description:Translational research is commonly performed in the C57B6/J mouse strain, chosen for its genetic homogeneity and phenotypic uniformity. Here, we evaluate the suitability of the white-footed deer mouse (Peromyscus leucopus) as a model organism for aging research, offering a comparative analysis against C57B6/J and diversity outbred (DO) Mus musculus strains. Our study includes comparisons of body composition, skeletal muscle function, and cardiovascular parameters, shedding light on potential applications and limitations of P. leucopus in aging studies. Notably, P. leucopus exhibits distinct body composition characteristics, emphasizing reduced muscle force exertion and a unique metabolism, particularly in fat mass. Cardiovascular assessments showed changes in arterial stiffness, challenging conventional assumptions and highlighting the need for a nuanced interpretation of aging-related phenotypes. Our study also highlights inherent challenges associated with maintaining and phenotyping P. leucopus cohorts. Behavioral considerations, including anxiety-induced responses during handling and phenotyping assessment, pose obstacles in acquiring meaningful data. Moreover, the unique anatomy of P. leucopus necessitates careful adaptation of protocols designed for Mus musculus. While showcasing potential benefits, further extensive analyses across broader age ranges and larger cohorts are necessary to establish the reliability of P. leucopus as a robust and translatable model for aging studies.
| S-EPMC11335981 | biostudies-literature
Project description:Gene-Expression Profiles in IRS Knockout Brown Preadipocytes
| PRJNA92167 | ENA
Project description:To investigate the differences in microRNA expression profiles between fibrotic and normal livers, we performed microRNA microarrays for total RNA extracts isolated from mouse livers treated with carbontetrachloride (CCl4) or corn-oil for 10 weeks (n=3/group). MicroRNAs were considered to have significant differences in expression level when the expression difference showed more than two-fold change between the experimental and control groups at p<0.05. We found that 12 miRNAs were differentially expressed in CCl4-induced fibrotic liver.
2016-03-22 | GSE77271 | GEO
Project description:Sigurdsson2010 - Genome-scale metabolic model
of Mus Musculus (iMM1415)
This model is described in the article:
A detailed genome-wide
reconstruction of mouse metabolism based on human Recon 1.
Sigurdsson MI, Jamshidi N,
Steingrimsson E, Thiele I, Palsson BØ.
BMC Syst Biol 2010; 4: 140
Abstract:
BACKGROUND: Well-curated and validated network
reconstructions are extremely valuable tools in systems
biology. Detailed metabolic reconstructions of mammals have
recently emerged, including human reconstructions. They raise
the question if the various successful applications of
microbial reconstructions can be replicated in complex
organisms. RESULTS: We mapped the published, detailed
reconstruction of human metabolism (Recon 1) to other mammals.
By searching for genes homologous to Recon 1 genes within
mammalian genomes, we were able to create draft metabolic
reconstructions of five mammals, including the mouse. Each
draft reconstruction was created in compartmentalized and
non-compartmentalized version via two different approaches.
Using gap-filling algorithms, we were able to produce all
cellular components with three out of four versions of the
mouse metabolic reconstruction. We finalized a functional model
by iterative testing until it passed a predefined set of 260
validation tests. The reconstruction is the largest, most
comprehensive mouse reconstruction to-date, accounting for
1,415 genes coding for 2,212 gene-associated reactions and
1,514 non-gene-associated reactions.We tested the mouse model
for phenotype prediction capabilities. The majority of
predicted essential genes were also essential in vivo. However,
our non-tissue specific model was unable to predict gene
essentiality for many of the metabolic genes shown to be
essential in vivo. Our knockout simulation of the lipoprotein
lipase gene correlated well with experimental results,
suggesting that softer phenotypes can also be simulated.
CONCLUSIONS: We have created a high-quality mouse genome-scale
metabolic reconstruction, iMM1415 (Mus Musculus, 1415 genes).
We demonstrate that the mouse model can be used to perform
phenotype simulations, similar to models of microbe metabolism.
Since the mouse is an important experimental organism, this
model should become an essential tool for studying metabolic
phenotypes in mice, including outcomes from drug screening.
This model is hosted on
BioModels Database
and identified by:
MODEL1507180055.
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BioModels Database:
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To the extent possible under law, all copyright and related or
neighbouring rights to this encoded model have been dedicated to
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Public Domain Dedication for more information.
2015-07-30 | MODEL1507180055 | BioModels
Project description:Comparison of gene expression profiles of p63 null skin versus wild type skin
| PRJNA93115 | ENA
Project description:BackgroundCopy number variation is an important dimension of genetic diversity and has implications in development and disease. As an important model organism, the mouse is a prime candidate for copy number variant (CNV) characterization, but this has yet to be completed for a large sample size. Here we report CNV analysis of publicly available, high-density microarray data files for 351 mouse tail samples, including 290 mice that had not been characterized for CNVs previously.ResultsWe found 9634 putative autosomal CNVs across the samples affecting 6.87% of the mouse reference genome. We find significant differences in the degree of CNV uniqueness (single sample occurrence) and the nature of CNV-gene overlap between wild-caught mice and classical laboratory strains. CNV-gene overlap was associated with lipid metabolism, pheromone response and olfaction compared to immunity, carbohydrate metabolism and amino-acid metabolism for wild-caught mice and classical laboratory strains, respectively. Using two subspecies of wild-caught Mus musculus, we identified putative CNVs unique to those subspecies and show this diversity is better captured by wild-derived laboratory strains than by the classical laboratory strains. A total of 9 genic copy number variable regions (CNVRs) were selected for experimental confirmation by droplet digital PCR (ddPCR).ConclusionThe analysis we present is a comprehensive, genome-wide analysis of CNVs in Mus musculus, which increases the number of known variants in the species and will accelerate the identification of novel variants in future studies.
| S-EPMC4490682 | biostudies-literature