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Abdominal Aortic Aneurysm in the ApoE Knockout Mouse: Time Course of Control vs. Angiotensin II

ABSTRACT: Transcriptional profiling of suprarenal aorta from ApoE-/- mice (12-14 weeks old, C57BL/6J background) treated by subcutaneous pump with angiotensin II or saline for 7d, 14d and 28d. Includes Ang II-treated samples at 7d found to have dissected aneurysms. Goal was to examine gene expression in developing AAA in this model over time.

ORGANISM(S): Mus musculus

PROVIDER: GSE17901 | GEO | 2009/10/01

SECONDARY ACCESSION(S): PRJNA120089

REPOSITORIES: GEO

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Transcription profiling of mouse suprarenal aorta from ApoE knock-outs treated with angiotensin II or saline to study developing abdominal aortic aneurysm (AAA)

Project description:Transcriptional profiling of suprarenal aorta from ApoE-/- mice (12-14 weeks old, C57BL/6J background) treated by subcutaneous pump with angiotensin II or saline for 7d, 14d and 28d. Includes Ang II-treated samples at 7d found to have dissected aneurysms. Goal was to examine gene expression in developing AAA in this model over time. Experiment Overall Design: Two condition experiment, one suprarenal aorta per array. Saline vs. angiotensin II at 3 time points, with inclusion of 3 Ang II-treated dissected. Total 35 arrays: 6 saline 7d, 6 saline 14d, 5 saline 28d, 4 Ang II 7d, 5 Ang II 14d, 6 Ang II 28d, 3 Ang II-dissected 7d.

2009-10-09 | E-GEOD-17901 | biostudies-arrayexpress

Angiotensin II induced aneurysms in male ApoE mice

Project description:In this study we used microarrays to examine relative genes expression within the aorta of ApoE-/- infused with angiotensin II in relation to aneurysm formation. Infusion of angiotensin II induces aortic dilatation particularly of the suprarenal aorta in ApoE-/- mice. Based on studies carried out in our and other laboratories the response to angiotensin II is variable, with some mice developing large aneurysms but other animals appearing resistant to aneurysm formation with aortic diameters similar to that of saline controls. We compared RNA expression from whole aortas of 17 week old male ApoE-/- mice exposed to angiotensin II (1.44 Âµg/kg/min) for 4 weeks where there was clear evidence of aortic aneurysm formation (n=5) with that of mice failing to develop aneurysms (n=7) and those exposed to saline infusion (n=6). AAA was defined as diameter of suprarenal aorta greated than 1.5mm measured on photographs of aortas at necroscopy. Keywords: Disease state analysis 18 samples analysed, AAA (n=5), no AAA (n=7), saline (n=6). AAA - abdominal aortic aneurysm

2010-06-24 | E-GEOD-12591 | biostudies-arrayexpress

Angiotensin II induced aneurysms in male ApoE mice

Project description:In this study we used microarrays to examine relative genes expression within the aorta of ApoE-/- infused with angiotensin II in relation to aneurysm formation. Infusion of angiotensin II induces aortic dilatation particularly of the suprarenal aorta in ApoE-/- mice. Based on studies carried out in our and other laboratories the response to angiotensin II is variable, with some mice developing large aneurysms but other animals appearing resistant to aneurysm formation with aortic diameters similar to that of saline controls. We compared RNA expression from whole aortas of 17 week old male ApoE-/- mice exposed to angiotensin II (1.44 µg/kg/min) for 4 weeks where there was clear evidence of aortic aneurysm formation (n=5) with that of mice failing to develop aneurysms (n=7) and those exposed to saline infusion (n=6). AAA was defined as diameter of suprarenal aorta greated than 1.5mm measured on photographs of aortas at necroscopy. Keywords: Disease state analysis

2009-08-26 | GSE12591 | GEO

Mouse and human abdominal aneurysm proteomics

Project description:Aortic tissues of developing and established aneurysms produced by angiotensin II (AngII) infusion were examined in Apoe-/- and Ldlr-/- mice. Aortas were also acquired from wildtype C57BL/6J mice following intraluminal elastase incubation. Aortas were dissected free and separated into eight anatomical segments for proteomics in comparison to their appropriate controls. In addition, proteomics was performed on human infrarenal aortic aneurysm tissues as well as aortic tissue collected from age-matched controls.

2022-08-02 | PXD032293 | Pride

Myocardin Attenuates Aortic Aneurysm and Dissection Through the Maintenance of VSMC Homeostasis

Project description:Myocardin (Myocd) plays an important role in the maintenance and homeostasis of the vasculature. The loss of Myocd results in vascular smooth muscle cell (VSMC) phenotypic transition and thoracic aortic aneurysms and dissections (TAADs) by downregulating VSMC contractile genes. VSMC phenotypic transition plays a key role in the formation of abdominal aortic aneurysms and dissections (AAADs). However, little is known about the role of Myocd in AAAD. The effect of Myocd on AAA formation was proven in an angiotensin II (Ang II)-induced AAD model. Myocd overexpression or knockdown was achieved by the injection of the corresponding adeno-associated virus serotype 9 (AAV9) through the tail vein. The knockdown of Myocd in C57BL/6J mice treated with angiotensin II promoted the formation of AAAD, as demonstrated by increases in the maximal aortic diameter, vascular inflammation and elastin degradation relative to the control group, while Myocd-overexpressing ApoE-/- mice infused with Ang II were less likely to develop AAAD. Mechanistically, Myocd deficiency significantly repressed VSMC marker gene expression. In addition, qPCR results showed that Myocd knockdown promoted the expression of lncRNAs, which showed increased levels in human AAD tissues. Our results indicated the pivotal role of Myocd in protecting against AAAD formation.

2024-10-25 | GSE180990 | GEO

Identification of Angiotensin II-senstive microRNAs in mouse abdominal aortic endothelium

Project description:Endothelial-enriched total RNAs were obtained from the suprarenal region of the abdominal aorta which is the murine AAA prone area in AngII-infused C57BL/6 mice.

2014-07-01 | GSE54943 | GEO

Expression data from the abdominal aorta and abdominal aortic aneurysm

Project description:Global gene expression information that can be used to identify pathways involved in the pathophysiology of disease. We used microarrays to identify which genes are expressed in either the abdominal aorta (control) or in abdominal aortic aneurysms (case), and also which genes may be differential between the two tissue states. Keywords: Characterization of expression in both diseased and non-diseased abdominal aortas.

2007-07-26 | GSE7084 | GEO

A molecular fingerprint for terminal abdominal aortic aneurysm progression

Project description:Analysis of differential gene expression for rutured vs stable abdominal aortic aneurysms (AAA) and for intermediate size (≤55mm) vs large (>70mm) AAA.

2018-02-27 | GSE98278 | GEO

Bone morphogenetic protein 4 (BMP4) mediates inflammation and endothelial-mesenchymal transition (EndoMT) in the vascular remodeling of angiotensin (Ang) II -induced abdominal aortic aneurysm

Project description:Abdominal aortic aneurysm (AAA) is one of the most common fatal macrovascular diseases worldwide which generates huge economic burdens on humanity. Regretfully, the pathogenesis of AAA is still not well clarified. In our study, 10×single-cell sequencing revealed that endothelial cells (ECs) dysfunction and endothelial-mesenchymal transition (EndoMT) appeared in progress of angiotensin (Ang)-II induced AAA. Three different types of ECs, including Mature ECs, EndoMT ECs and Injury & inflammation ECs successively appeared during the progression of AAA. Compared with Mature ECs, EndoMT ECs and Injury & inflammation ECs had stronger extracellular matrix synthesis function and lower metabolic level. Transcription factor analysis revealed that interferon regulatory factor 6 (Irf6) and homeobox A9 (Hoxa9) may be the critical regulons in Injury & inflammation ECs. According pseudotime trajectory and KEGG enrichment analysis, we speculated bone morphogenetic protein 4 (BMP4) regulated EndoMT, thus participating in Ang II-induced AAA. Our study represented BMP4 promotes phenotypic transition, cell migration and invasion of ECs by PI3K/AKT/mTOR pathways in vitro. Protein-protein interaction (PPI) analysis and co-immunoprecipitation (Co-IP) revealed that biglycan (BGN), a kind of small leucine-rich proteoglycan, directly combined with BMP4, which enhanced conversion degree of EndoMT. BMP4 reprogrammed ECs from anti-inflammatory to proinflammatory phenotype, which eventually led to AAA.

2024-07-01 | GSE231306 | GEO

Expression data from Angiotensin II (Ang II)-treated Rat Vascular Smooth Muscle Cells (RVSMC)

Project description:Angiotensin II (Ang II)-mediated vascular smooth muscle cells (VSMC) dysfunction plays a critical role in cardiovascular diseases. However, the gene expression in this process is unclear. We used Rat Affymetrix gene array to profile Ang II-regulated gene in RVSMC and evaluated their role in VSMC dysfunction. Examined 4 samples of Rat VSMC in triplicate. Control (without Ang II treatment) and 3 samples treated with Ang II for 6h, 12h, and 24h. Compared the changes in gene expression in Ang II treated samples relative to control samples.

2012-03-23 | E-GEOD-35627 | biostudies-arrayexpress

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