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MKL1 ChIP-seq in sham and hepatectomy mouse liver.

ABSTRACT: MKL1 ChIP-seq in sham and hepatectomy mouse liver.

PROVIDER: PRJNA917521 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR22955279.fastq.gz	Fastqsanger.gz
	SRR22955280.fastq.gz	Fastqsanger.gz
	SRR22955281.fastq.gz	Fastqsanger.gz

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MKL1 ChIP-seq in sham and hepatectomy mouse liver.

Project description:To investigate the function of MKL1 in liver regeneration. Wild-type C57/B6 mouse were performed sham operation or two-thirds hepatectomy. 24 hours later, ChIP-seq was did with MKL1 antibody.

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Project description:Background: Extended hepatectomies may result in post-hepatectomy liver failure, a condition with a high mortality. The main purpose of the present study was to investigate and compare the gene expression profiles in rats subjected to increasing size of partial hepatectomy. Methods: 40 Wistar rats were subjected to 30%, 70%, or 90% partial hepatectomy, sham operation or no operation. 24 hours following resection, liver tissue was harvested and genome-wide expression analysis was performed. Results: Cluster analysis revealed 2 main groupings, one containing the PH(90%) and one containing the remaining groups (baseline, sham, PH(30%) and PH(70%)). Categorization of specific affected molecular pathways in the PH(90%) group revealed a downregulation of cellular homeostatic functions degradation and biosynthesis, whereas proliferation, cell growth, and cellular stress and injury were upregulated in the PH(90%) group. After PH(90%), the main upregulated pathways were mTOR and ILK. The main activated upstream regulators were hepatocyte growth factor and transforming growth factor. Conclusion: With decreasing size of the future liver remnant, the liver tended to prioritize expression of genes involved in cell proliferation and differentiation at the expense of genes involved in metabolism and body homeostasis. This prioritizing may be an essential molecular explanation for post-hepatectomy liver failure.

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Project description:The recovery of liver mass is mainly mediated by proliferation and enlargement of hepatocytes after partial hepatectomy. Studying the gene expression profiles of hepatocytes after partial hepatectomy will be helpful in exploring the mechanism of liver regeneration. We used microarrays to further highlight the regulatory role of hepatocyte in liver regeneration at gene transcription level. Rat liver regeneration after partial hepatectomy (PH) is a good model to study the regulation of cell proliferation. We isolated hepatocytes from regenerating liver at 9 time points (2, 6, 12,24, 30, 36, 72, 120, and 168h) after PH and measured gene expression profiles of hepatocytes from 2h to 168h with rat Genome 230 2.0 gene chip. Each sample corresponding to one time point was hybridized onto one array. The experiment was repeated 3 times for each time point. In total, 10 time points were measured and 0h was used control group. After careful quality control analyses of each chip, Affymetrix GCOS 2.0 software was used to analyze the data. The relevance of gene expression profiles and biological processes was analyzed by bioinformatics and systems biology.

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