TGF-beta mediated hepatic stellate cells activation is dampened in the absence of EPHB2 in vitro.
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE274898 | GEO | 2026/01/31
REPOSITORIES: GEO
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Project description:Metabolic dysfunction-associated steatohepatitis (MASH) is emerging as the leading cause for liver transplantation worldwide. MASH is chatacterized by hepatic lipid accumulation, inlammation and fibrosis which is associaed with worst outcome in patients sufferreing from this pathology. Using the murine choline deficient amino acid defined high fat diet (CDAA-HFD) model of MASH we showed that Ephb2-specific deletion in HSCs using the tamoxifen inducible PdgfCre-eRT2 promoer driver is sufficient to mitigate MASH fibrosis in mice.
2026-01-31 | GSE274899 | GEO
Project description:Metabolic dysfunction-associated steatohepatitis (MASH) is emerging as the leading cause for liver transplantation worldwide. MASH is chatacterized by hepatic lipid accumulation, inlammation and fibrosis which is associaed with worst outcome in patients sufferring from this pathology. Using the Gubra Amyln NASH (GAN) diet model of murine MASH, we showed that global deletion of Ephb2 in mice protect them from GAN diet-induced inlammation and fibrosis. EphB2 could be a potential therapeutic target for the treatment of MASH fibrosis.
2026-01-31 | GSE274897 | GEO
Project description:EphB2 deficiency in hepatic stellate cells mitigated MASH fibrosis in mice.
| PRJNA1148426 | ENA
Project description:Objectives: Eph/Ephrin cell-cell signaling is emerging as a key player in tissue fibrogenesis. The aim of this study was to test the hypothesis that the receptor tyrosine kinase EphB2 mediates dermal fibrosis in systemic sclerosis (SSc). Methods: We assessed normal and SSc human skin biopsies for EphB2 expression. The in vivo role of EphB2 in skin fibrosis was investigated by subjecting EphB2-knockout mice to both bleomycin-induced and tight skin (Tsk1/+) genetic mouse models. EphB2 kinase-dead and overactive point mutant mice were used to evaluate the role of EphB2 forward signaling in bleomycin-induced dermal fibrosis. In vitro studies were performed on dermal fibroblasts from SSc patients and healthy controls, which was followed by in vivo analysis of fibroblast-specific EphB2 deficient mice. Results: Expression of EphB2 is upregulated in SSc skin tissue and explanted SSc dermal fibroblasts compared to healthy controls. EphB2 expression is elevated in two animal models of dermal fibrosis. In mice, EphB2 drives dermal fibrosis in both the bleomycin and the Tsk1/+ models of skin fibrosis. EphB2 forward signaling is a critical mediator of dermal fibrosis. Transforming growth factor-β (TGFβ) cytokines upregulate EphB2 in dermal fibroblasts via non-canonical TGFβ/SMAD signaling and silencing EphB2 in dermal fibroblasts is sufficient to dampen TGFβ-induced fibroblast-to-myofibroblast differentiation. Moreover, mice with fibroblast-specific deletion of EphB2 showed impaired fibroblast-to-myofibroblast differentiation and reduced skin fibrosis upon bleomycin challenge. Conclusion: Our data implicate EphB2 overexpression and kinase-mediated forward signaling in the development of dermal fibrosis in SSc. EphB2 thus represents a potential new therapeutic target for SSc.
2024-04-10 | GSE253089 | GEO
Project description:The molecular determinants of a healthy human liver cell phenotype remain largely uncharacterized. In addition, the gene expression changes associated with activation of primary human hepatic stellate cells, a key event during fibrogenesis, remain poorly characterized. Here, we provide the transriptomic profile underpinning the healthy phenotype of human hepatocytes, liver sinusoidal endothelial cells (LSECs) and quiescent hepatic stellate cells (qHSCs) as well as activated HSCs (aHSCs) We assess the transcriptome for purified, non-cultured human hepatocytes, liver sinusoidal cells (LSECs) and quiescent hepatic stellate cells (qHSCs) as well as culture-activated HSCs (aHSCs). Hepatocytes (n=2 donors), LSECs (n=3), qHSCs (n=3) and in vitro activated HSCs (n=3; from the same donors as the qHSCs and LSECs) were used for this study.
2016-03-02 | E-GEOD-68000 | biostudies-arrayexpress
Project description:Metabolic dysfunction-associated steatohepatitis (MASH) is a chronic liver disease associated with hepatic inflammation and fibrosis. Inflammasome-mediated IL-18 signaling is enhanced under MASH condition. IL-18 binding protein (IL-18BP) is a soluble protein that can block IL-18 actions and therapeutic potential of IL-18BP for MASH-induced fibrosis is largely unknown. We newly developed a human IL-18BP biologics (APB-R3) and injected it to mice to evaluate its pharmacologic efficacy. APB-R3 strikingly abolished hepatic fibrosis and reduced collagen markers. We further investigated whether APB-R3 could inhibit fibrotic activation of hepatic stellate cells (HSCs). This study proposes that abrogation of IL-18 signaling by boosting IL-18BP can strongly inhibit the development of MASH-induced fibrosis and our engineered IL-18BP biologics can become promising therapeutic candidate for curing MASH.
2024-10-18 | GSE279499 | GEO
Project description:Hepatic fibrosis is a wound-healing response to chronic liver injury, which may result in cirrhosis and liver failure. The c-Jun N-terminal kinase-1 (JNK1) gene has been shown to be involved in liver fibrosis. Here, we aimed to investigate the molecular mechanism and identify the cell-type involved in mediating the JNK1-dependent effect on liver fibrogenesis Wild-type (WT), JNK1−/− and JNK1Δhepa (hepatocyte-specific deletion of JNK1) mice were subjected to bile duct ligation (BDL). Additionally, we performed bone marrow transplantations (BMT), isolated primary hepatic stellate cells (HSCs) and studied their activation in vitro. Serum markers of liver damage (liver transaminases, alkaline phosphatase and bilirubin) and liver histology revealed reduced injury in JNK1−/− compared to WT and JNK1Δhepa mice. Hepatocyte cell death and proliferation was reduced in JNK1−/− compared to WT and JNK1Δhepa. Parameters of liver fibrosis such as Sirius Red staining as well as Collagen IA1 and αSMA expression were down-regulated in JNK1−/− compared to WT and JNK1Δhepa livers, 4 weeks after BDL. To delineate the essential cell-type, we performed BMT of WT and JNK1-/- into JNK1-/- and WT mice, respectively. BMT experiments excluded bone marrow derived cells from having a major impact on the JNK1-dependent effect on fibrogenesis. Hence, we investigated primary HSCs from JNK1−/− livers showing reduced transdifferentiation compared with WT and JNK1Δhepa-derived HSCs. We conclude that JNK1 in HSCs plays a crucial role in hepatic fibrogenesis and thus represents a promising target for cell-directed treatment options for liver fibrosis. Control (JNK1f/f), JNK1 null (JNK1-/-) and hepatocyte-specific JNK1 null (JNK1Δhepa) mice were subjected to control, acute and chronic injury, i.e. sham or bile-duct ligation for 48h or 28 days resp., whereafter gene expression profiles were determined.
2013-11-27 | E-GEOD-40041 | biostudies-arrayexpress
Project description:The molecular determinants of a healthy human liver cell phenotype remain largely uncharacterized. In addition, the gene expression changes associated with activation of primary human hepatic stellate cells, a key event during fibrogenesis, remain poorly characterized. Here, we provide the transriptomic profile underpinning the healthy phenotype of human hepatocytes, liver sinusoidal endothelial cells (LSECs) and quiescent hepatic stellate cells (qHSCs) as well as activated HSCs (aHSCs) We assess the transcriptome for purified, non-cultured human hepatocytes, liver sinusoidal cells (LSECs) and quiescent hepatic stellate cells (qHSCs) as well as culture-activated HSCs (aHSCs).
2016-03-02 | GSE68000 | GEO
Project description:Liver fibrosis is characterized by the excessive formation and accumulation of matrix proteins as a result of wound healing in the liver. A main event during fibrogenesis is the activation of the liver resident quiescent hepatic stellate cell (qHSC). Recent studies suggest that reversion of the activated HSC (aHSC) phenotype into a quiescent-like phenotype could be a major cellular mechanism underlying fibrosis regression in the liver, thereby offering new therapeutic perspectives for the treatment of liver fibrosis. The goal of the present study is to identify experimental conditions that can revert the activated status of human HSCs and to map the molecular events associated with this phenotype reversion by gene expression profiling Transcriptomic profiling of primary human quiescent HSCs (qHSCs), in vitro activated HSCs (aHSCs) and in vitro reverted HSCs (rHSCs). The cell types come from different donors (This is detailed in the original manuscript.).
2015-08-12 | E-GEOD-68001 | biostudies-arrayexpress
Project description:Background and aims: Metabolic dysfunction-associated steatotic liver disease (MASLD) progresses from steatosis (Metabolic dysfunction-associated steatotic liver, MASL) to Metabolic dysfunction-associated steatohepatitis (MASH) with fibrosis. Activation of Hepatic Stellate Cells (HSCs) into fibrogenic myofibroblasts plays a critical role in the pathogenesis of MASH liver fibrosis. Here we compared gene expression and chromatin accessibility profiles of human HSCs in NORMAL, MASL, and MASH livers at single cell resolution. Methods: 18 human livers were profiled using single-nucleus (sn) RNA-seq and snATAC-seq. High priority targets were identified and then tested in 2D human HSCs, 3D human liver spheroids, and HSC-specific gene knockout mice. Results: This study identified novel gene regulatory mechanisms underlying MASL- and MASH-associated HSC heterogeneity and outlined potential strategies for anti-fibrotic therapy. Specifically, MASH-enriched HSC-subcluster hA1, represented by highly fibrogenic population of myofibroblasts, served as a critical source of extracellular matrix protein (ECM) in MASH, and its activation was regulated via a cross-talk between lineage-specific (JUNB/AP1), cluster-specific (RUNX1/2) and signal-specific (FOXA1/2) transcription factors (TFs). Additionally, we identified a set of core genes (GAS7, SPON1, SERPINE1, LTBP2, KLF9, EFEMP1) that drive ECM production in hA1 HSCs. The pathological relevance of the selected hA1 targets, such as SERPINE1 and others, was demonstrated using siRNA-based HSC-specific gene knockdown or pharmacological inhibitor of SERPINE1 in 3D human MASH liver spheroids, and HSC-specific Serpine1 knockout mice with MASH. Conclusion: We identified potential targets for anti-fibrotic therapy of MASH in patients.
2024-11-13 | GSE244832 | GEO