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ScATAC-seq of mouse 3,5-diethoxycarbonyl-1,4-dihydrocollidine (DDC) induced liver injury model

ABSTRACT: Regulatory T cells (Tregs) were shown to protect from cholestatic liver injury. Here we investigate whether amphiregulin (AREG), a ligand for epithelial growth factor receptor (EGFR) which promotes epithelial repair, mediates innate Treg functions in cholangiopathies. Mice were fed with diet containing 0.1 % of the xenobiotic 3,5-diethoxycarbonyl-1,4-dihydrocollidine (DDC) for 14 days to induce sclerosing cholangitis, followed by a 28-day recovery period (without DDC). Liver mononuclear and epithelial cells were enriched and subjected to single-cell sequencing at four time points: baseline, at day 14 of DDC treatment, and following a 14- or 28-day recovery period from 14 days of DDC treatment.

ORGANISM(S): Mus musculus

PROVIDER: GSE230091 | GEO | 2025/12/31

REPOSITORIES: GEO

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Project description:Background and aims: Liver is a major target organ for alcohol-induced disease and the spectrum of pathological states elicited by alcohol in liver comprises steatosis, alcoholic steatohepatitis, progressive fibrosis and cirrhosis, conditions that may progress to hepatocellular carcinoma. Many experimental animal models of alcoholic steatohepatitis exist that vary in duration, mode of alcohol administration and the degree and types of liver injury produced. While most of these models, regardless whether alcohol is administered through liquid diet or intragastrically, produce steatohepatitis and mild fibrosis, it is widely acknowledged that these models fail to fully recapitulate key characteristics of severe forms of alcoholic liver disease, such as alcoholic hepatitis. Recent studies attempted to combine alcohol and fibrosis and achieved promising results in mouse models that achieve some of the key features of alcoholic liver disease accompanied by exacerbated fibrosis and acute renal injury. This study combined a chronic cholestatic liver fibrosis model induced by 3,5-diethoxycarbonyl-1,4-dihydrocollidine (DDC) with a mouse model of intragastric alcohol feeding. Methods: Adult male C57BL6/J mice were treated with 3,5-diethoxycarbonyl-1,4-dihydrocolidine (DDC) containing diet (0.05% w/w) to induce chronic liver fibrosis. Following DDC-induced fibrogenesis, ethyl alcohol (EtOH) (up to 27 g/ kg/day, up to 28 days) was administered continuously to mice via a gastric feeding tube (Tsukamoto-Frenchmodel of alcoholic liver disease). Results: Exposure to DDC or EtOH alone resulted in liver fibrosis or steatosis, respectively. Combined treatment with DDC and EtOH lead to an additive effect on liver injury, as evident by the development of hepatic inflammation, steatosis, and pericellular fibrosis, and by increased serum transaminase levels, compared to mice treated with either agent alone. Liver transcriptomic changes specific to combined treatment group included pathways involved in the cell cycle and DNA damage. Analyses of feces from these mice revealed alcohol-associated changes to the bile acid profile and gut microbiome. Conclusions: Mice treated with DDC and EtOH displayed several key characteristics of human alcoholic hepatitis, including pericellular fibrosis, increased hepatic bacterial load with dysbiosis, reduced capacity of the microbiome to synthesize secondary bile acids.

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ScATAC-seq of mouse 3,5-diethoxycarbonyl-1,4-dihydrocollidine (DDC) induced liver injury model

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