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Single-nucleus RNA-seq of aortas from Ldlr-/- and Ldlr-/-Trem2-/- atherosclerotic mice

ABSTRACT: Single-nucleus RNA-seq of aortas from Ldlr-/- and Ldlr-/-Trem2-/- atherosclerotic mice

PROVIDER: PRJNA1016340 | ENA |

REPOSITORIES: ENA

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Single-nucleus RNA-seq of aortas from Ldlr-/- and Ldlr-/-Trem2-/- atherosclerotic mice

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Project description:The aim of this study was to analyze the transcriptome of diverse Nrf2-deficient macrophage subpopulations from murine atherosclerotic aortas. Mice with transcriptionally inactive Nrf2 in Cdh5-expressing cells (Nrf2Cdh5tKO) were used in the experiments. These mice lack transcriptional Nrf2 activity in endothelial cells, but also in a proportion of leukocytes. We confirmed that the bone marrow-derived and tissue-resident macrophages isolated from Nrf2Cdh5tKO mice exhibit a significant decline in Nrf2 activity. Atherosclerosis was induced in Nrf2Cdh5tKO and appropriate control mice via adeno-associated viral vector (AAV)-mediated overexpression of murine proprotein convertase subtilisin/kexin type 9 (Pcsk9) in the liver and high-fat diet feeding. After 21 weeks, live aortic cells were sorted on FACS and single-cell RNA sequencing (scRNA-seq) was performed. Our findings indicate that Nrf2 deficiency in aortic macrophages leads to subtype-specific transcriptomic changes associated with inflammation, iron homeostasis, cell injury or death pathways. This may help understanding the role of aging-associated decline of Nrf2 activity and the function of specific macrophage subtypes in atherosclerotic lesion development.

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