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Next-generation sequencing reveals the regulatory mechanism of transcription factor Foxk1 in the liver (RNA-seq)

ABSTRACT: The goal of this study was to apply next-generation sequencing (NGS) analyses to identify genes and pathways regulated by the Foxk1 transcription factor in the liver and to see the effects of liver-specific Foxk1 deficiency in the diet-induced non-alcoholic steatohepatitis (NASH) model. Transcriptome and ChIP-seq analysis revealed that liver Foxk1 promotes the pathogenesis of NASH by regulating the expression of a series of molecules involved in hepatic lipid metabolism in an mTORC1-dependent manner.

ORGANISM(S): Mus musculus

PROVIDER: GSE197322 | GEO | 2022/03/01

REPOSITORIES: GEO

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Next-generation sequencing reveals the regulatory mechanism of transcription factor Foxk1 in the liver (ChIP-seq)

Project description:The goal of this study was to apply next-generation sequencing (NGS) analyses to identify genes and pathways regulated by the Foxk1 transcription factor in the liver and to see the effects of liver-specific Foxk1 deficiency in the diet-induced non-alcoholic steatohepatitis (NASH) model. Transcriptome and ChIP-seq analysis revealed that liver Foxk1 promotes the pathogenesis of NASH by regulating the expression of a series of molecules involved in hepatic lipid metabolism in an mTORC1-dependent manner.

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Expression data from human non-alcoholic fatty liver disease stages

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2014-11-07 | E-GEOD-63067 | biostudies-arrayexpress

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Post-transplant (non-alcoholic steatohepatitis) NASH compared with transplanted normal controls

Project description:Non-alcoholic fatty liver disease (NAFLD) encompasses a spectrum of disease that ranges from simple steatosis, to inflammatory form non-alcoholic steatohepatitis (NASH), cirrhosis, and up to hepatocellular carcinoma. While NASH usually takes decades to develop at a rate of one stage per seven years, in the case of post-trasplant NASH (pt-NASH) develops fibrosis much more rapidly, with almost 50% of liver transplant recipients presenting stage 3 fibrosis by 5 years post-transplant. Archived fresh-frozen transplanted liver biopsy samples from four liver biopsy samples with evidence of NASH (2 recurrent and 2 de novo), two with simple steatosis (both de novo), and five with normal histology as controls had their transcriptome sequenced in two batches for deeper coverage.

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miRNAs expression profiles in HepG2 cells treated with SAHA and/or 5-Aza-CdR

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Project description:The goal of this study was to apply Next Generation Sequencing analyses to identify genes and pathways regulated by the FOXK1 and FOXK2 transcription factor in HeLa cells and to see whether reconstitution of FOXK1 WT and mutants can rescue the altered gene regulation in FOXK1 KO cells. Gene Ontology (GO) analysis did not uncover any dysregulated DNA damage–related pathways upon FOXKs KO. We found that cells reconstituted with any of the three FOXK1 mutants could largely rescue dysregulated gene expression in FOXK1 KO cells, similar to cells reconstituted with WT FOXK1. These suggesting that FOXK1's role in DNA damage response is not by direct transcriptional regulation of DNA damage related pathways and all the three FOXK1 mutants could not affect transcription.

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Gene expression alterations by the mTORC1-FOXK1 pathway

Project description:C-C chemokine ligand 2 (CCL2) plays pivotal roles in tumor formation, progression, and metastasis. Although CCL2 expression has been found to be dependent on the nuclear factor (NF)–κB signaling pathway, the regulation of CCL2 production in tumor cells has remained unclear. We have identified a noncanonical pathway for regulation of CCL2 production that is mediated by mammalian target of rapamycin complex 1 (mTORC1) but independent of NF-κB. Multiple phosphoproteomics approaches identified the transcription factor forkhead box K1 (FOXK1) as a downstream target of mTORC1. Activation of mTORC1 induces dephosphorylation of FOXK1 resulting in transactivation of the CCL2 gene. Inhibition of the mTORC1-FOXK1 axis attenuated insulin-induced CCL2 production as well as the accumulation of tumor-associated monocytes-macrophages and tumor progression in mice. Our results suggest that FOXK1 directly links mTORC1 signaling and CCL2 expression in a manner independent of NF-κB, and that CCL2 produced by this pathway contributes to tumor progression.

2017-11-28 | GSE67810 | GEO

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