Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA139737 | ENA |
REPOSITORIES: ENA
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Project description:Dietary glucosylceramide (GC) improves skin barrier function. To elucidate the molecular mechanisms involved, we used a microarray system to analyze mRNA expression in SDS-treated dorsal skin of hairless mouse. Transepidermal water loss of mouse skin was increased by SDS treatment and the increase was significantly reduced by prior oral administration of glucosylceramides. Microarray-evaluated mRNA expression ratios showed statistically significant increase of expression of genes related to cornified envelope and tight junction formation versus all genes in glucosylceramide-fed/SDS-treated mouse skin. We then examined the contribution of glucosylceramide metabolites to tight junction formation of cultured keratinocytes. SDS treatment of cultured keratinocytes significantly decreased the transepidermal electrical resistance, and the decrease was significantly ameliorated in the presence of sphingosine or phytosphingosine, the major metabolites of glucosylceramide. These results suggest that oral administration of glucosylceramide improves skin barrier function by upregulating genes associated with both cornified envelope and tight junction formation. Two-condition experiment, effect of oral intake of GC on mice skin before SDS treatment (0d), and after SDS treatment(2d), Biological replicates: 3 replicates for 0d, 4 replicates for 2d.
2012-03-31 | E-GEOD-28086 | biostudies-arrayexpress
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2019-12-31 | GSE120484 | GEO
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Project description:Purpose: To study the alteration of whole transcriptome of Lewis lung carcinoma (LLC) cells after the decreasing of malignant properties of tumor by treatment of tumor-bearing mice with RNase A. Methods: Whole transcriptome profile of Lewis lung carcinoma before and after RNase A treatment were generated by deep sequencing using SOLiD 5.5. The sequence reads were mapped by Bioscope 1.3 software, differential expression was evaluated by Cufflinks v.2.0.1 package. Results: Difference in expression was found for 966 genes. Conclusions: Our study represents the first detailed analysis of alteration of transcriptome of Lewis lung carcinoma after the decrease of malignant prtoperties of the tumor (proliferation and invasion) by RNase A.
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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.
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Project description:Dietary glucosylceramide (GC) improves skin barrier function. To elucidate the molecular mechanisms involved, we used a microarray system to analyze mRNA expression in SDS-treated dorsal skin of hairless mouse. Transepidermal water loss of mouse skin was increased by SDS treatment and the increase was significantly reduced by prior oral administration of glucosylceramides. Microarray-evaluated mRNA expression ratios showed statistically significant increase of expression of genes related to cornified envelope and tight junction formation versus all genes in glucosylceramide-fed/SDS-treated mouse skin. We then examined the contribution of glucosylceramide metabolites to tight junction formation of cultured keratinocytes. SDS treatment of cultured keratinocytes significantly decreased the transepidermal electrical resistance, and the decrease was significantly ameliorated in the presence of sphingosine or phytosphingosine, the major metabolites of glucosylceramide. These results suggest that oral administration of glucosylceramide improves skin barrier function by upregulating genes associated with both cornified envelope and tight junction formation.
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