Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA287691 | ENA |
REPOSITORIES: ENA
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Project description:Formation of foam cell macrophages (FCMs), which sequester extracellular modified lipids, is a key event in atherosclerosis. How lipid loading affects macrophage phenotype is controversial, with evidence suggesting either pro- or anti-inflammatory consequences. To investigate this further, we compared the transcriptomes of foamy and non-foamy macrophages (NFMs) that accumulate in the subcutaneous granulomas of fed-fat ApoE null mice and normal chow fed wild-type mice in vivo. Consistent with previous studies, LXR/RXR pathway genes were significantly over-represented among the genes up-regulated in foam cell macrophages. Unexpectedly, the hepatic fibrosis pathway, associated with platelet derived growth factor and transforming growth factor-? action, was also over-represented. Several collagen polypeptides and proteoglycan core proteins as well as connective tissue growth factor and fibrosis-related FOS and JUN transcription factors were up-regulated in foam cell macrophages. Increased expression of several of these genes was confirmed at the protein level in foam cell macrophages from subcutaneous granulomas and in atherosclerotic plaques. Moreover, phosphorylation and nuclear translocation of SMAD2, which is downstream of several transforming growth factor-? family members, was also detected in foam cell macrophages. We conclude that foam cell formation in vivo leads to a pro-fibrotic macrophage phenotype, which could contribute to plaque stability, especially in early lesions that have few vascular smooth muscle cells. Samples (n=4/group): Foam cell macrophages (FCM) isolated from inflammatory sponges placed in ApoE null mice fed a high-fat diet (n=4), non-foamy macrophages (NFM) isolated from inflammatory sponges placed in control mice fed a normal diet (n=4).
2015-07-23 | E-GEOD-70126 | biostudies-arrayexpress
Project description:We tried to identify miRs that are differentially expresssed during atherogenesis. Aortic miRs expression profile in female apoe-/- mice after 3 and 10 months of a high fat diet were compared with female apoe-/- mice on normal diet. 4 Female apoe-/- mice (6-8 weeks) were fed on high fat diet for 3 months. 3 female apoe-/- mice (6-8 weeks) were fed on high fat diet for 10 months. 4 female apoe-/- mice (6-8 weeks) on normal diet served as controls. Total RNA was isolated from whole aortic tissue. RNA samples with RIN>8 were used for array. The aortic miRs expression profile after 3 months of a high fat diet was compared with the control group. Biological replicates: 4 per group. One replicate per array.
2014-01-01 | E-GEOD-26557 | biostudies-arrayexpress
Project description:We developed a novel network inference approach, Biologically Anchored Knowledge Expansion (BAKE), to analyze large volume gene expression data obtained from a mouse model of insulin resistance progression. Both genetic aspects and dietary factors, specifically high caloric high-fat high-sugar diets, contribute to the progression of insulin resistance. To mimic genetic predisposition, we used a mouse model with double heterozygous deletion of early insulin signaling pathway intermediates, insulin receptor (IR) and insulin receptor substrate 1 (IRS1) genes. These mice were fed with high-fat (Western) or low-fat (Chow) diet for 8 and 16 weeks starting at 8 weeks of age. Gene expression data was collected from adipocytes isolated from these mice. Applying BAKE analysis to the adipocyte gene expression data, we demonstrate that we can accurately discover a novel regulatory gene in the insulin signaling pathway. The mouse model of double heterozygous deletion of insulin receptor (IR) and insulin receptor substrate 1 (IRS1) was originally introduced as a polygenic model to study the development of type 2 diabetes. This mouse model, on an atherosclerosis-prone ApoE null background (IR+/- IRS1+/- ApoE-/-), also shows increased atherosclerotic lesions due to impaired insulin signaling. For our study we used female double heterozygous mice (IR+/- IRS1+/-, 'Dhet' mice or 'Dâ mice) on an ApoE null background (ApoE-/-, âEâ) fed with a Western (high-fat) diet for 8 (DW8, n=5) and 16 (DW16, n=9) weeks starting at 8 weeks of age or with a Chow (low-fat) diet (DC8, n=7; DC16, n=5). There were also ApoE null mice (ApoE-/-, 'Eâ) fed either Western diet for 8 (EW8, n=6) and 16 (EW16, n=8) weeks or Chow diet for 16 weeks (EC16, n=5) starting at 8 weeks of age.
2015-12-31 | E-GEOD-76428 | biostudies-arrayexpress
Project description:mRNA and Circular RNA sequencing data of aortas of ApoE-/- male mice fed with high fat diet or normal chow diet for 12 weeks.
2021-05-19 | GSE159379 | GEO
Project description:Formation of foam cell macrophages (FCMs), which sequester extracellular modified lipids, is a key event in atherosclerosis. How lipid loading affects macrophage phenotype is controversial, with evidence suggesting either pro- or anti-inflammatory consequences. To investigate this further, we compared the transcriptomes of foamy and non-foamy macrophages (NFMs) that accumulate in the subcutaneous granulomas of fed-fat ApoE null mice and normal chow fed wild-type mice in vivo. Consistent with previous studies, LXR/RXR pathway genes were significantly over-represented among the genes up-regulated in foam cell macrophages. Unexpectedly, the hepatic fibrosis pathway, associated with platelet derived growth factor and transforming growth factor-β action, was also over-represented. Several collagen polypeptides and proteoglycan core proteins as well as connective tissue growth factor and fibrosis-related FOS and JUN transcription factors were up-regulated in foam cell macrophages. Increased expression of several of these genes was confirmed at the protein level in foam cell macrophages from subcutaneous granulomas and in atherosclerotic plaques. Moreover, phosphorylation and nuclear translocation of SMAD2, which is downstream of several transforming growth factor-β family members, was also detected in foam cell macrophages. We conclude that foam cell formation in vivo leads to a pro-fibrotic macrophage phenotype, which could contribute to plaque stability, especially in early lesions that have few vascular smooth muscle cells.
2015-07-23 | GSE70126 | GEO
Project description:The (C57BL/6J X C3H/HeJ)F2 intercross consists of 334 animals of both sexes. All are ApoE null and received a high fat Western diet from 8-24 weeks of age. Livers from 311 F2 female and male mice (animals fed a high fat "Western" diet from 8-24 weeks of age.) derived from C57BL/6J and C3H/HeJ parental strains with both on ApoE null backgrounds. All samples were compared to a common pool created from equal portions of RNA from each of the samples. Keywords=Genetics of Gene Expression Keywords=C57BL/6J Keywords=C3H/HeJ
2006-07-26 | E-GEOD-2814 | biostudies-arrayexpress
Project description:The (C57BL/6J X C3H/HeJ)F2 intercross consists of 334 animals of both sexes. All are ApoE null and received a high fat Western diet from 8-24 weeks of age. Adipose from 295 F2 female and male mice (animals fed a high fat "Western" diet from 8-24 weeks of age.) derived from C57BL/6J and C3H/HeJ parental strains with both on ApoE null backgrounds. All samples were compared to a common pool created from equal portions of RNA from each of the samples. Keywords=Genetics of Gene Expression Keywords=C57BL/6J Keywords=C3H/HeJ
2006-07-07 | E-GEOD-3086 | biostudies-arrayexpress
Project description:The (C57BL/6J X C3H/HeJ)F2 intercross consists of 334 animals of both sexes. All are ApoE null and received a high fat Western diet from 8-24 weeks of age. Brain from 249 F2 female and male mice (animals fed a high fat "Western" diet from 8-24 weeks of age.) derived from C57BL/6J and C3H/HeJ parental strains with both on ApoE null backgrounds. All samples were compared to a common pool created from equal portions of RNA from each of the samples. Keywords=Genetics of Gene Expression Keywords=C57BL/6J Keywords=C3H/HeJ
2006-07-06 | E-GEOD-3087 | biostudies-arrayexpress
Project description:The (C57BL/6J X C3H/HeJ)F2 intercross consists of 334 animals of both sexes. All are ApoE null and received a high fat Western diet from 8-24 weeks of age. Muscle from 319 F2 female and male mice (animals fed a high fat "Western" diet from 8-24 weeks of age.) derived from C57BL/6J and C3H/HeJ parental strains with both on ApoE null backgrounds. All samples were compared to a common pool created from equal portions of RNA from each of the samples. Keywords=Genetics of Gene Expression Keywords=C57BL/6J Keywords=C3H/HeJ
2006-07-06 | E-GEOD-3088 | biostudies-arrayexpress
Project description:ApoE-/- and Bl6 mice were fed normal chow of high fat diet. CD11c+ cells were isolated from mouse spleens. and mRNA expression was quantified using gene arrays.
2021-12-18 | GSE191044 | GEO