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The NTCP receptor inhibitor Ezetimibe reduces the toxicity of α-amanitin: in vitro and in vivo study.

ABSTRACT: The NTCP receptor inhibitor Ezetimibe reduces the toxicity of α-amanitin: in vitro and in vivo study.

PROVIDER: PRJNA987536 | ENA |

REPOSITORIES: ENA

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The NTCP receptor inhibitor Ezetimibe reduces the toxicity of α-amanitin: in vitro and in vivo study.

Project description:Background and Aims: To verify the protective effect of Ezetimibe, an sodium taurocholate co-transporting polypeptide (NTCP) inhibitor, on α-amanitin poisoning in vitro and in vivo by inhibiting NTCP to prevent α-amanitin into hepatocytes. Approach and Results: In animal experiments, the survival rate was significantly improved in the treatment group. The pathomorphological characteristics of liver and kidney in the treatment group were significantly improved. In cell experiments,The cell viability of the treatment group was significantly improved, and the expression of NTCP in the treatment group was significantly decreased by immunofluorescence. In molecular docking simulations, we demonstrated the potential of NTCP to bind Ezetimibe and α-amanitin, respectively. Transcriptomics in high-throughput sequencing was used to detect the differential metabolic genes between α-amanitin poisoning group and the treatment group, and signal pathway enrichment was used to analyze the significantly different signal pathways. Conclusions: Ezetimibe, as an inhibitor of NTCP, can reduce the entry of α-amanitin into hepatocytes to play a protective role and improve the cell viability and survival rate of mice.

2023-06-30 | GSE235740 | GEO

Transcriptome profiles of Huh7.5.1-NTCP cells treated with HBV preS1 peptide

Project description:Chronic hepatitis B, C and D virus (HBV, HCV, HDV) infections are leading causes of liver disease and cancer worldwide. Although these viruses differ markedly in their life cycle and genomic organization, they exclusively infect hepatocytes. Recently, the sodium taurocholate cotransporting polypeptide (NTCP) was identified as the first functional receptor for HBV and HDV. Here, we report that NTCP also facilitates HCV entry into human hepatocytes, by augmenting the bile acid-mediated repression of IFN-stimulated genes (ISGs), including IFITM2 and IFITM3, to increase the susceptibility of cells to HCV entry. Furthermore, an HBV-derived preS1 peptide, known to bind NTCP and to inhibit bile acid uptake and HBV infection, inhibits HCV entry by enhancing the expression of ISGs. Our study highlights NTCP as a novel player linking bile acid metabolism to the interferon response in hepatocytes and establishes a role for NTCP in the entry process of multiple hepatotropic viruses, via distinct mechanisms. Collectively, these findings enhance our understanding of hepatitis virus-host interactions and suggest NTCP as an attractive antiviral target for HBV/HCV co-infection. Transcriptome profiling by DNA microarray of Huh7.5.1 cells transduced to express NTCP.

2016-10-25 | E-GEOD-79089 | biostudies-arrayexpress

Calnexin depletion by ER-stress during cholestasis inhibits the Na+-taurocholate Cotransporting Polypeptide (NTCP)

Project description:Impaired bile flow (cholestasis) leads to transcriptional downregulation of the bile acid importer Na+-taurocholate co-transporting protein (NTCP) and to ER-stress in the liver. Here, we show that ER-stress induction strongly reduces NTCP protein expression, plasma membrane abundance and NTCP-mediated bile acid uptake. This is not controlled via a single specific UPR-pathway but mainly depends on the interaction of NTCP with calnexin, an ER chaperone involved in folding of N-glycosylated proteins. In mice, expression of both Ntcp and calnexin was reduced by thapsigargin-induced ER-stress. Calnexin downregulation in HepG2 and U2OS cells results in a decreased NTCP expression and a reduced bile acid uptake. Calreticulin shows partial functional redundancy with calnexin as it also interacts with NTCP, and is downregulated upon ER-stress, but specifically in calnexin-depleted cells. In conclusion, ER stress-induced downregulation of calnexin provides an additional mechanism to dampen NTCP-mediated bile acid uptake during cholestasis.

2019-01-07 | PXD007948 | Pride

Effect of ezetimibe treatment on gene expression of TGFβ1-activated primary human lung fibroblasts

Project description:To verify whether ezetimibe inhibits myofibroblast differentiation at the transcriptome level and to reveal the mechanism of action of ezetimibe, we sequenced primary human lung fibroblasts that we isolated and cultured.

2024-02-22 | GSE225982 | GEO

Transcriptomic alteration after miR-6126 tranfection into HepG2-NTCP

Project description:Aim: Hepatitis B virus (HBV) infection is one of the most serious global health problems. Our previous study revealed that an increase in the miR-6126 serum level over one year of pegylated interferon therapy predicted a decrease in hepatitis B surface (HBs) antigens. We aimed to clarify whether miR-6126 downregulated the expression level of sodium taurocholate cotransporting polypeptide (NTCP), a host cell receptor required for HBV entry. Methods: HepG2-NTCP and PXB cells were utilized to evaluate the expression level of NTCP after transfection with miR-6126. The protein expression level of NTCP was evaluated using Western blot analysis and immunostaining. The expression profile of messenger RNAs was evaluated using next-generation sequencing to search for direct targets of miR-6126.

2021-12-28 | GSE192617 | GEO

Transcriptome profiles of Huh7.5.1-NTCP cells treated with HBV preS1 peptide

2016-10-25 | GSE79089 | GEO

Gene expression changes in testes from Abcg8 knockout mice compared to wild-type mice or to Abcg8 knockout mice where plant sterol entry was blocked by ezetimibe

Project description:Abcg8 knockout mice, fed chow, are infertile. These mice also are susceptible to absorption and retention of xenosterols contained in the diet. Ezetimibe, a blocker of dieary sterol entry, can reverse the fertility in Abcg8 knockout mice. In order to identify if the xenosterols resulted in disruption of a specific set of genes in the testes, we compared wild-type testes, Abcg8 knockout testes, or testes from Abcg8 knockout mice fed chow supplemented with 0.005% ezetimibe. To identify genes of interest, we reasoned that any causative gene expression changes seen in Abcg8 knockout mice fed chow, resulting in xenosterol exposure and accumulation, leading to infertilty, would be reveresed back to a pattern seen in the wild-type mice, when Abcg8 knockout mice are raised on chow containing ezetimibe (which prevents xenosterol absorption in the intestine). The target of this drug, Npc1l1, is not expressed in the testes. Testes from wild-type mice, Abcg8 knockout mice, and Abcg8 knockout mice fed chow supplemented with ezetimibe were analyzed.

2012-08-01 | E-GEOD-39813 | biostudies-arrayexpress

Next generation sequencing of transcriptomic change in NTCP-reconstituted HepG2 cells after hepatocyte maintanace medium treatment

Project description:In order to profile the transcriptomic change in NTCP-reconstituted HepG2 cells after the treatment with hepatocyte maintanace medium. HMM-pretreated HepG2/NTCP cells turned to be more susceptible to hepatitis B virus infection.

2021-07-09 | GSE173576 | GEO

Base Editing Reduces Misfolded Protein Accumulation and Toxicity in Alpha-1 Antitrypsin Deficient Patient iPSC-Hepatocytes

Project description:Base Editing Reduces Misfolded Protein Accumulation and Toxicity in Alpha-1 Antitrypsin Deficient Patient iPSC-Hepatocytes

| PRJNA740068 | ENA

Base Editing Reduces Misfolded Protein Accumulation and Toxicity in Alpha-1 Antitrypsin Deficient Patient iPSC-Hepatocytes

Project description:Base Editing Reduces Misfolded Protein Accumulation and Toxicity in Alpha-1 Antitrypsin Deficient Patient iPSC-Hepatocytes

| PRJNA740069 | ENA