Hybrid Mouse diversity Panel Liver Expression Profile
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE16780 | GEO | 2009/12/07
SECONDARY ACCESSION(S): PRJNA117535
REPOSITORIES: GEO
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Project description:Novel, systems-based approach to mouse genetics. Expression Profiles from 99 strains of inbred and recombinant inbred mice. Most assayed in triplicate. Two of 288 chips were excluded from the final analysis due to low QC scores.
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Project description:Significant advances have been made in the discovery of genes affecting bone mineral density (BMD); however, our understanding of its genetic basis remains incomplete. In the current study, genome-wide association (GWA) and co-expression network analysis was used in the recently described Hybrid Mouse Diversity Panel (HMDP) to identify and functionally characterize novel BMD genes. In the HMDP, a GWA of total body, spinal and femoral BMD revealed four significant associations (-log10P > 5.39) affecting at least one BMD trait on chromosomes (Chrs.) 7, 11, 12 and 17. The associations implicated a total of 163 genes with each association harboring between 14 and 112 genes. This list was reduced to 26 functional candidates by identifying those genes that were regulated by local eQTL in bone or harbored potentially functional non-synonymous (NS) SNPs. This analysis revealed that the most significant BMD SNP on Chr. 12 was a NS SNP in the additional sex combs like-2 (Asxl2) gene that was predicted to be functional. The involvement of Asxl2 in the regulation of bone mass was confirmed by the observation that Asxl2 knockout mice had reduced BMD. To begin to unravel the mechanism though which Asxl2 influenced BMD, a gene co-expression network was created using cortical bone gene expression microarray data from the HMDP strains. Asxl2 was identified as a member of a co-expression gene module enriched for genes involved in the differentiation of myeloid cells. In bone, osteoclasts are bone-resorbing cell of myeloid origin, suggesting that Asxl2 may play a role in osteoclast differentiation. In agreement, the knockdown of Asxl2 in bone marrow macrophages impaired their ability to form osteoclasts. This study identifies a new regulator of BMD and osteoclastogenesis and highlights the power of GWA and systems genetics in the mouse for dissecting complex genetic traits. RNA from cortical bone (femoral diaphysis free of marrow) were profiled from 99 Hybrid Mouse Diversity Panel strains were profiled. Sixteen-week old male mice were used in this study. A total of 1-3 mice per strain were arrayed.
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Project description:Transcriptomes performed on left ventricular heart samples from mice of the hybrid mouse diversity panel, a set of over a hundred inbred strains of mice. In this project, the strains were challenged with Isoproterenol, a beta-adrenergic agonist to induce cardiac hypertrophy and failure. Results are useful for the analysis of heart-related traits in mice
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Project description:As part of the PhenoGen Project (https://phenogen.org), liver RNA-Seq data has been collected from strains of the Hybrid Rat Diversity Panel (HRDP). RNA expression levels were estimated using high throughput RNA sequencing (RNA-Seq) on long (>200 nucleotides) RNAs, i.e., total RNA where ribosomal RNA was depleted. These data can be used to examine predisposition phenotypes in the HRDP. Processed data and interactive graphics are also available through the PhenoGen website. Additional data from additional strains will be added as they become available.
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