Transcription profiling of aortae from 32 week old apoE knock-out and wild type mice
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
SUBMITTER: Andreas Johann Richard Habenicht
PROVIDER: E-GEOD-2372 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:Aortae of 32 weeks old apoE mice versus wild type mice on a C57BL/6J Background. Keywords = mouse aorta microarray Keywords: other
2005-05-04 | GSE2372 | GEO
Project description:APOE is the main genetic modifier for late onset Alzheimer’s disease (LOAD). While an APOE2/APOE3/APOE4 allelic series is well established for LOAD risk and neuropathology, molecular mechanisms underlying isoform-dependent risk and relevance of ApoE-associated lipids remain elusive. Here, we studied the effects of LPS stimulation on APOE KO iPSC-derived microglia treated with different ApoE isoforms (ApoE2/E3/E4) pre-complexed with BODIPY-cholesteryl ester (CE) and HDL -/+ recombinant LDLR extracellular domain.
2024-11-10 | GSE250249 | GEO
Project description:LPS stimulation of APOE knock-out iPSC-derived microglia with different ApoE isoforms
| PRJNA1052733 | ENA
Project description:Tertiary lymphoid organs (TLOs) emerge in response to nonresolving inflammation but their roles in adaptive immunity remain unknown. Here, we explored artery TLOs (ATLOs) to delineate atherosclerosis T cell responses in apoe-/- mice during aging. Though the T cell repertoire showed systemic age-associated contractions in size and modifications in subtype composition and activation, wt and apoe-/- mice were equally affected. In contrast, ATLOs - but not wt aortae, apoe-/- aorta segments without ATLOs or atherosclerotic plaques - promoted T cell recruitment, altered characteristics of T cell motility, primed and imprinted T cells in situ, generated CD4+/FoxP3-, CD4+/FoxP3+, CD8+/FoxP3- effector and central memory cells, and converted naïve CD4+/FoxP3- T cells into induced Treg cells. ATLOs also showed substantially increased antigen presentation capability by conventional dendritic cells (DCs) and monocyte-derived DCs but not by plasmacytoid DCs. Thus, the senescent immune system specifically employs ATLOs to control dichotomic atherosclerosis T cell immune responses. We assembled transcriptome maps of wt and apoe-/- aortae and aorta-draining RLNs and identified ATLOs as major sites of atherosclerosis-specific T cell responses during aging: Transcriptome atlases of wt and apoe-/- abdominal aortae and associated draining RLNs were constructed from laser capture microdissection (LCM)-based whole genome mRNA expression microarrays yielding 6 maps: wt adventitia (tissue-1); wt RLN (tissue-2); apoe-/- ATLOs (tissue-3); apoe-/- RLN (tissue-4); apoe-/- adventitia without adjacent plaques (tissue-5), and plaques (tissue-6). Several two-tissue comparisons within the transcriptome atlases are noteworthy: Unexpectedly, transcriptomes of wt and apoe-/- RLNs were virtually identical; additonal data revealed that transcriptomes of RLNs were strikingly similar to those of inguinal LNs which do not drain the aorta adventitia (as shown of India ink injection experiments of surgically exposed aortae); in sharp contrast, wt adventitia versus ATLOs revealed 1405 differentially expressed transcripts many of which encoded members of GO terms immune response and inflammatory response; the ATLO-plaque comparison also showed > 1000 differentially expressed transcripts; however, wt adventitia versus apoe-/- adventitia without plaque showed few genes (< 5 % of differentially expressed transcripts of the wt adventitia-ATLO comparison). Thus, the aorta transcriptome atlases support the conclusion that neither aorta-draining apoe-/- RLNs nor ILNs participate in atherosclerosis-specific T cell responses. In addition, they demonstrate that T cell responses in the diseased aorta are highly territorialized. Finally, these data show that the immune responses carried out in ATLOs differ significantly from those carried out in plaques. We next identified three major clusters within the transcriptome atlases through ANOVA analyses and application of strict filters: An adventitia cluster, a plaque/ATLO cluster, and a LN/plaque cluster. The total number of differentially expressed genes in each cluster were examined for GO terms immune response, inflammatory response, T cell activation, positive regulation of T cell response, and T cell proliferation. Within the adventitia cluster, similarities of transcriptomes of wt adventitia and apoe-/- adventitia without associated plaque versus ATLOs indicate that a robust number of immune response-regulating genes are selectively expressed in ATLOs which are located within a distance of few µm of the adventitia without associated plaques indicating a very high degree of territoriality of the atherosclerosis T cell response. Furthermore, unlike the total number of differentially regulated transcripts, the majority of transcripts among GO terms immune response and inflammatory response, was up-regulated. Inspection of the plaque/ATLO cluster provided further information: The majority of immune response regulating genes where expressed at a higher level in ATLOs when compared to plaques though plaques also contained a significant number of immune response regulating genes; the reverse is true for genes regulating inflammation. Finally, the lymph node cluster revealed that though the majority of immune response regulating genes resides in both wt and apoe-/- RLNs (with little differences between them) ATLOs express a selected set of immune response regulating genes at a higher level when compared to LNs. In addition, the inflammatory component of ATLOs when compared to LNs is documented by the finding that many more genes regulating inflammation reside in ATLOs even when compared to those of plaques. Key words: T cell response in atherosclerosis; Laser capture microdissection; transcriptome atlas of atherosclerosis. Citations: Gräbner R. et al. Lymphotoxin beta receptor signaling promotes tertiary lymphoid organogenesis in the aorta adventitia of aged ApoE-/- mice. J Exp Med 2009 Jan 16;206(1):233-48. PMID: 19139167; Moos M. et al. The lamina adventitia is the major site of immune cell accumulation in standard chow-fed apolipoprotein E-deficient mice. Arterioscler Thromb Vasc Biol. 2005 Nov;25(11):2386-91. Epub 2005 Sep 22. PMID: 16179593; Beer M. et al. Laser-capture microdissection of hyperlipidemic/ApoE-/- mouse aorta atherosclerosis. Methods Mol Biol. 2011;755:417-28. PMID: 21761324; Weih F. et al. Control of Dichotomic Innate and Adaptive Immune Responses by Artery Tertiary Lymphoid Organs in Atherosclerosis. Front Physiol. 2012;3:226. Epub 2012 Jul 6. PMID: 22783198. Wild-type and apoE-deficient mice on the C57BL/6J genetic background were maintained on a standard mouse chow. Total aortae were removed at the age of 6 (n=3), 32 (n=3), or 78 (n=3) w and microarrays were prepared from total RNA extracts or extracts of atherosclerotic lesions and adventitiae obtained by the use of a laser dissection microscope. In addition, aorta associated LNs or distant LNs were prepared from both mouse genotypes.
2013-10-30 | E-GEOD-40156 | biostudies-arrayexpress
Project description:One of the hallmarks of Alzheimer’s disease is the presence of extracellular diffuse and fibrillar plaques predominantly consisting of the amyloid-β (Aβ) peptide. ApoE influences the deposition of amyloid pathology through affecting the clearance and aggregation of monomeric Aβ in the brain. In addition to influencing Aβ metabolism, increasing evidence suggests that apoE influences microglial function in neurodegenerative diseases. Here, we characterize the impact that apoE has on amyloid pathology and the innate immune response in APPPS1∆E9 and APPPS1-21 transgenic mice. We report that Apoe deficiency reduced fibrillar plaque deposition consistent with previous studies. However, fibrillar plaques in Apoe-deficient mice exhibited a striking reduction in plaque compaction. Hyperspectral fluorescent imaging using luminescent conjugated oligothiophenes identified distinct Aβ morphotypes in Apoe-deficient mice. We also observed a significant reduction in fibrillar plaque-associated microgliosis and activated microglial gene expression in Apoe-deficient mice, along with significant increases in dystrophic neurites around fibrillar plaques. Our results suggest that apoE is critical in stimulating the innate immune response to amyloid pathology.
2018-02-15 | GSE109906 | GEO
Project description:we analyzed proteomics data from ApoE-/- and CD57BL/6J mouse models of Ang II-induced AAA and control mice, which were analyzed abdominal aortic tissues by LC–MS/MS.
2022-05-24 | PXD034043 |
Project description:Identification of novel pathways in the development of atherosclerosis. Here, we are looking at changes in gene expression that occur in the aorta with the development of atherosclerosis Analysis used RNA from thoracic aortas from chow fed ApoE knockout mice as control samples for comparison to the experimental samples from 8 week and 16 week ApoE knockout mice fed a western-type diet
2015-02-03 | E-GEOD-65494 | biostudies-arrayexpress
Project description:Inbred mouse strains C57BL/6J (B6) and C3H/HeJ (C3H) exhibit a marked difference in their susceptibility to atherosclerosis and the arterial wall has proven to be a source of the difference in atherosclerosis susceptibility. Genome-wide gene expression analysis was conducted in aortic walls of the two strains. Total RNA was extracted from aortas of 6-week-old female B6 and C3H apoE-deficient (apoE-/-) mice fed a chow or Western diet. 1514 genes in chow fed mice and 590 genes in Western fed mice were found to be differentially expressed between the two strains. RNA was extracted from aorta using a Trizol protocol. Total RNA was pooled in an equal amount from 4 mice for each group. Standard Affymetrix procedures were performed using 8ug of total RNA. Microarrays were used to detect gene expression in aortic walls of two apoE-deficient mouse strains when fed a chow or western diet. Experiment Overall Design: 4 groups of mice were studied: C57BL/6 apoE-/- mice on chow diet (03-62_BC), C57BL/6 apoE-/- mice on Western diet (03-62_BW), C3H/HeJ apoE-/- mice on chow diet (03-62_CC), and C3H/HeJ apoE-/- mice on Western diet (03-62_CW). Mice were weaned at 3 weeks of age onto a chow diet. At 4 weeks of age, mice were switched onto a western diet or continued the chow diet for 2 additional weeks.
2009-02-28 | E-GEOD-14854 | biostudies-arrayexpress
Project description:Microarray gene expression profiling of aorta genes of APOE-deficient mice receiving atherosclerosis treatment with the ACE inhibitor captopril. Hypercholesterolemic APOE-deficient mice were used as a standard model of atherosclerosis to study gene expression changes during atherosclerosis treatment with the ACE inhibitor captopril. Microarray analysis was performed of whole aortas isolated from captopril-treated APOE-deficient mice relative to untreated APOE-deficient mice with overt atherosclerosis, and nontransgenic control mice. Microarray gene expression profiling revealed that captopril-mediated atherosclerosis prevention involved inhibition of aorta-infiltrating immune cells such as pro-atherogenic T lymphocytes and macrophages. Experiment Overall Design: Microarray gene expression profiling was performed of whole aortas isolated from APOE-deficient mice with atherosclerosis relative to captopril-treated APOE-deficient mice, and nontransgenic control mice. Three study groups were analyzed, i.e. 8-months-old untreated APOE-deficient mice with overt atherosclerosis, age-matched APOE-deficient mice treated for 7 months with the angiotensin-converting enzyme (ACE) inhibitor, captopril (20 mg/kg in drinking water), and nontransgenic control C57BL/6J mice. Two biological replicates were made of each group, and total RNA of three aortas was pooled for one gene chip.
2009-12-14 | E-GEOD-19286 | biostudies-arrayexpress
Project description:Mouse platelets were collected following 4 days of exercise or standard-housing from 8-week-old C57BL/6J mice and mass spectrometry performed (5 mice per group). The analysis revealed differences in the proteomic content of platelets isolated from standard-housed and exercising mice.
2023-08-18 | PXD041700 | Pride