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Genome-wide DNA accessibility maps after Sirt6 inactivation in muscle stem cells [ATAC-seq]

ABSTRACT: Genome-wide DNA accessibility maps after Sirt6 inactivation in muscle stem cells [ATAC-seq]

PROVIDER: PRJNA706937 | ENA |

REPOSITORIES: ENA

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Genome-wide DNA accessibility maps after Sirt6 inactivation in muscle stem cells [ATAC-seq]

Project description:Sirt6, the NAD+-dependent deacetylase, has been described to deacetylate H3K9, H3K18, and H3K56. However, analysis of the acetylation status revealed that loss of Sirt6 caused a massive increase of histone H3K56ac levels but no detectable change of histone H3K9ac and H3K18ac, indicating that SIRT6 is the dominant deacetylase for H3K56ac in muscle stem cells (MuSCs). Further, we investigate genome transposase-accessible chromatin in the absence of Sirt6 in MuSCs using high throughput sequencing (ATAC-seq).

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Inactivation of Sirt6 ameliorates muscular dystrophy in mdx mice by releasing suppression of utrophin expression

Project description:In this study, Pax7-Cre mediated inactivation of Sirt6 in mdx mice resulted in profound improvement of the mdx phenotype at the functional level. To study the underlying molecular mechanisms and identify specific Sirt6 targets irrespectively to mdx mutation, we performed RNA-seq of freshly isolated muscle stem cells from control and Sirt6mKO mice.

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Project description:Sirt6, the NAD+-dependent deacetylase, has been described to deacetylate H3K9, H3K18, and H3K56. However, analysis of the acetylation status revealed that loss of Sirt6 caused a massive increase of histone H3K56ac levels but no detectable change of histone H3K9ac and H3K18ac, indicating that SIRT6 is the dominant deacetylase for H3K56ac in muscle stem cells (MuSCs). Further, we investigate genome-wide H3K56ac profiling in the absence of Sirt6 in MuSCs and mouse embryonic stem cells (mESCs) using high throughput sequencing (ChIP-seq).

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SIRT6 suppresses pancreatic cancer through control of Lin28b [ChIP-seq]

Project description:Chromatin remodeling proteins are frequently dysregulated in human cancer, yet little is known about how they control tumorigenesis. Here, we uncover an epigenetic program mediated by the NAD+-dependent histone deacetylase Sirtuin 6 (SIRT6) that is critical for suppression of pancreatic ductal adenocarcinoma (PDAC), one of the most lethal malignancies. SIRT6 inactivation accelerates PDAC progression and metastasis via upregulation of Lin28b, a negative regulator of the let-7 microRNA. SIRT6 loss results in histone hyperacetylation at the Lin28b promoter, Myc recruitment, and pronounced induction of Lin28b and downstream let-7 target genes, HMGA2, IGF2BP1 and IGF2BP3. This epigenetic program defines a distinct subset representing 30-40% of human PDAC, characterized by poor prognosis and an exquisite dependence on Lin28b for tumor growth. Thus, we identify SIRT6 as an important PDAC tumor suppressor, and uncover the Lin28b pathway as a potential therapeutic target in a molecularlydefined PDAC subset. ChIP-Seq experiments to examine H3K56ac histone modifications in murine PDAC cells that are Sirt6 wild type (WT), Sirt6 knock-out (KO), and Sirt6 KO cells engineered to express Sirt6 WT (Sirt6 KO + Sirt6 WT Restored).

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Project description:In this study, Pax7-Cre mediated inactivation of Sirt6 in mdx mice resulted in profound improvement of the mdx phenotype at the functional level. To study the underlying molecular mechanisms we performed RNA-seq of muscles from control, mdx and Sirt6mKO/mdx mice.

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Sirt6 study

Project description:This SuperSeries is composed of the following subset Series: GSE13206: Human shSIRT6 TNF-alpha timecourse GSE13207: Mouse Sirt6-/- TNF-alpha timecourse GSE13208: Mouse Sirt6-/- tissues GSE13209: Mouse Sirt6-/- RelA+/- tissues Refer to individual Series

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Transcriptome profiling of muscle stem cells from control, mdx and Sirt6 knockout on mdx background mice

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