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ATAC-seq Analysis in Control and Mier1 KO Mice Liver at 0 h and 24 h after 70% Partial Hepatectomy

ABSTRACT: To explore how Mier1 affects liver regeneration, we specifically knocked out Mier1 in mouse liver through adeno-associated virus (AAV). The mice we used were knocked in a Cre-induced Cas9 expression cassette. Through tail vein injection, we delivered the AAV expressing Cre-recombinase under TBG promoter, and sgRNA targeting Mier1 (AAV-Mier1 sgRNA), into the adult Cas9 knockin mice to knock out the Mier1 gene in liver. AAV vectors with no sgRNA inserted (AAV-Cre) were used in control animals. To assess the role of MIER1 in liver regeneration, we performed 70% partial hepatectomy, 3 weeks after AAV injection. We then performed ATAC-seq in Control and Mier1 liver-sepcific knockout mice liver tissues at 0 h and 24 h after PHx to explore the influence of Mier1 on the chromation opening during liver regeneration.

ORGANISM(S): Mus musculus

PROVIDER: GSE212626 | GEO | 2022/12/31

REPOSITORIES: GEO

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Analysis of Control and Liver-specific Mier1 KO Liver Transcriptomes after 70% Partial Hepatectomy

Project description:To explore how Mier1 affiects liver regeneration, we specifically knocked out Mier1 in mouse liver through adeno-associated virus (AAV). The mice we used were knocked in a Cre-induced Cas9 expression cassette. Through tail vein injection, we delivered the AAV expressing Cre-recombinase under TBG promoter, and sgRNA targeting Mier1 (AAV-Mier1 sgRNA), into the adult Cas9 knockin mice to knock out the Mier1 gene in liver. AAV vectors with no sgRNA inserted (AAV-Cre) were used in control animals. To assess the role of MIER1 in liver regeneration, we performed 70% partial hepatectomy, 3 weeks after AAV injection. We then performed RNA sequencing analysis on liver tissues collected from control and Mier1 ko groups at 0 h, 24 h, 36 h, 48 h and 72 h after partial hepatectomy. Interestingly, although MIER1 depletion did not cause a significant difference in expression of cell cycle genes before surgery, the increase of cell cycle gene expression during liver regeneration was significantly enhanced after MIER1 loss. Further analysis showed that after partial hepatectomy, MIER1 loss caused significant upregulation of genes enriched in cell proliferation relevant pathways.

2022-12-30 | GSE188421 | GEO

H3K27ac ChIP-seq Analysis in WT and MIER1 Depletion Liver Tissues at 0 h and 24 h after 70% Partial Hepatectomy

Project description:To explore how Mier1 influence the genome H3K27ac levels during liver regeneration, we performed H3K27ac chromatin immunoprecipitation followed by sequencing in control and liver-specific Mier1 ko liver tissues at 0 h and 24 h after 70% partial hepatectomy (PHx). The mice we used were knocked in a Cre-induced Cas9 expression cassette. Through tail vein injection, we delivered the AAV expressing Cre-recombinase under TBG promoter, and sgRNA targeting Mier1 (AAV-Mier1 sgRNA), into the adult Cas9 knockin mice to knock out the Mier1 gene in liver. AAV vectors with no sgRNA inserted (AAV-Cre) were used in control animals.Then we performed 70% partial hepatectomy, 3 weeks after AAV injection. Consistent with the increased expression of cell cycle genes during liver regeneration, we observed increased signals of H3K27ac at 24 h after hepatectomy, especially near some cell cycle genes, after MIER1 depletion in liver tissue.

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RNA-seq Analysis of Mier1 Effects in HFD Aging and Adipose Tissue Lipe Knockout Mice after 70% Partial Hepatectomy

Project description:To explore how Mier1 affiects high-fat diet-fed, aging and adipose tissue Lipe knockout mice liver regeneration, we specifically knocked out liver Mier1 in high-fat diet-fed, aging and adipose tissue Lipe knockout mice through adeno-associated virus (AAV). The mice we used were knocked in a Cre-induced Cas9 expression cassette. Through tail vein injection, we delivered the AAV expressing Cre-recombinase under TBG promoter, and sgRNA targeting Mier1 (AAV-Mier1 sgRNA), into the adult Cas9 knockin mice to knock out the Mier1 gene in liver. AAV vectors with no sgRNA inserted (AAV-Cre) were used in control animals. To assess the role of MIER1 in liver regeneration, we performed 70% partial hepatectomy on high-fat diet-fed, aging and adipose tissue Lipe knockout mice. We then performed RNA sequencing analysis on liver tissues collected from control and Mier1 ko groups at 0 h, 48h or 36 h after partial hepatectomy. RNA-seq analysis showed that after partial hepatectomy, MIER1 loss caused significant upregulation of genes enriched in cell proliferation relevant pathways.

2022-12-31 | GSE212628 | GEO

MIER1-FLAG ChIP-seq Analysis in Liver at 0 h and 24 h after 70% Partial Hepatectomy

Project description:To explore how Mier1 influence liver regeneration, we performed chromatin immunoprecipitation followed by sequencing in liver tissues at 0 h and 24 h after 70% partial hepatectomy (PHx). Due to a lack of available MIER1 antibody for ChIP-seq analysis, exogenous liver expression of MIER1-FLAG under TBG promoter was executed using AAV vectors, and ChIP-seq was conducted using FLAG antibody. Liver tissues from animals receiving empty vectors were also collected for ChIP-seq with FLAG antibody as negative control to remove possible non-specific binding signals from FLAG antibody. We observed in total 9310 sites bound by MIER1 in total, with a majority of these binding sites around the transcription start sites or present in introns or exons. Further analysis combining the results from RNA-seq revealed a significant set of genes involved in cell cycle, DNA replication and chromosome organization, that were bound by MIER1 and upregulated after MIER1 loss in liver tissues 24 hours after surgery, indicating a direct functional regulation of these genes via MIER1.

2022-12-30 | GSE188747 | GEO

Gene expression profiling of HDAC3-depleted mouse liver rescued with wild-type exogenous HDAC3

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2013-11-25 | E-GEOD-49386 | biostudies-arrayexpress

Gene expression profiling of HDAC3-depleted mouse liver rescued with wild-type exogenous HDAC3

2013-11-25 | GSE49386 | GEO

Lipidomics dataset of PTEN deletion-induced nerve regeneration mouse model

Project description:We present the lipidome of adult PTENloxP/loxP mice subjected to intravitreal injection of adeno-associated viruses expressing Cre (AAV-Cre) as a model of regeneration. At 4-week-old, PTENloxP/loxP mice were intravitreally-injected with 2-3 μl of either AAV-Cre (KO) or AAV-PLAP (control), and two weeks later optic nerve crush was performed. At indicated time-points after crush (0 days, 7 days, 14 days), mice were euthanized and optic nerves were immediately dissected out, and then flash frozen on dry ice. The Bligh and Dyer method was used for lipid extraction, followed by mass spectrometry lipid profiling with a Q-Exactive Orbitrap Liquid Chromatography-Mass Spectrometer (LC MS-MS). The raw scans were analysed with LipidSearch 4.2 and the statistical analysis was conducted through Metaboanalyst 4.0

2020-08-31 | ST001477 | MetabolomicsWorkbench

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Project description:Histone deacetylases 1 and 2 (HDAC1/2) serve as the catalytic subunit of six distinct families of nuclear complexes. These complexes repress gene transcription through removing acetyl groups from lysine residues in histone tails. In addition to the deacetylase subunit, these complexes typically contain transcription factor and/or chromatin binding activities. The MIER:HDAC complex has hitherto been poorly characterized. Here we show that MIER1 unexpectedly co-purifies with an H2A:H2B histone dimer. We show that MIER1 is also able to bind a complete histone octamer. Intriguingly, we found that a larger MIER1:HDAC1:BAHD1:C1QBP complex additionally co-purifies with an intact nucleosome on which H3K27 is either di- or tri-methylated. Together this suggests that the MIER1 complex acts downstream of PRC2 to expand regions of repressed chromatin and could potentially deposit histone octamer onto nucleosome-depleted regions of DNA.

2023-04-14 | PXD040685 | Pride

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Project description:To investigate the involvement of Neat1 in neuropathic pain, Neat1 was knocked down in DRG neurons by the injection of AAV vector encoding shRNA for Neat1.

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