Transcriptional analysis of in vivo responses to acetaminophen induced hepatic injury in the murine liver
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE111828 | GEO | 2019/03/20
REPOSITORIES: GEO
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Project description:Acute liver failure is a serious clinical manifestation resulting from sudden liver injury, which can be triggered by various factors. One of the most frequent causes of acute liver failure is excessive ingestion of acetaminophen (APAP), which is known to damage hepatocytes directly by reducing glutathione levels in cells, ultimately leading to hepatocyte death.PGE2 can play a dual role in inflammation, either promoting or inhibiting the inflammatory response, depending on the cell type, local concentration, receptor type, and tissue microenvironment. Early studies have shown that PGE2 significantly alleviated acute liver failure induced by galactosamine/lipopolysaccharide, APAP, and carbon tetrachloride. However, the precise mechanism by which PGE2 alleviates APAP-induced acute liver failure remains unclear. The aim of this study is to investigate the mechanisms underlying the protective effects of PGE2 against APAP-induced hepatocyte injury.
2023-09-01 | GSE241511 | GEO
Project description:Acute liver failure is a serious clinical manifestation resulting from sudden liver injury, which can be triggered by various factors. One of the most frequent causes of acute liver failure is excessive ingestion of acetaminophen (APAP), which is known to damage hepatocytes directly by reducing glutathione levels in cells, ultimately leading to hepatocyte death.PGE2 can play a dual role in inflammation, either promoting or inhibiting the inflammatory response, depending on the cell type, local concentration, receptor type, and tissue microenvironment. Early studies have shown that PGE2 significantly alleviated acute liver failure induced by galactosamine/lipopolysaccharide, APAP, and carbon tetrachloride. However, the precise mechanism by which PGE2 alleviates APAP-induced acute liver failure remains unclear. The aim of this study is to investigate the mechanisms underlying the protective effects of PGE2 against APAP-induced hepatocyte injury.
2023-09-01 | GSE241510 | GEO
Project description:Acute liver failure is a serious clinical manifestation resulting from sudden liver injury, which can be triggered by various factors. One of the most frequent causes of acute liver failure is excessive ingestion of acetaminophen (APAP), which is known to damage hepatocytes directly by reducing glutathione levels in cells, ultimately leading to hepatocyte death.PGE2 can play a dual role in inflammation, either promoting or inhibiting the inflammatory response, depending on the cell type, local concentration, receptor type, and tissue microenvironment. Early studies have shown that PGE2 significantly alleviated acute liver failure induced by galactosamine/lipopolysaccharide, APAP, and carbon tetrachloride. However, the precise mechanism by which PGE2 alleviates APAP-induced acute liver failure remains unclear. The aim of this study is to investigate the mechanisms underlying the protective effects of PGE2 against APAP-induced hepatocyte injury.
2023-09-01 | GSE241509 | GEO
Project description:We previously showed that severe liver diseases are characterized by expansion of liver progenitor cells (LPC), which correlates with disease severity. However, the origin and role of LPC in liver physiology and in the hepatic response to injury remains a contentious topic. We have now used genetic lineage tracing of Hnf1β-expressing biliary duct cells to assess their contribution to LPC expansion and hepatocyte generation during normal liver homeostasis, and following different types of liver injury. We found that ductular reaction cells in human cirrhotic livers express HNF1β. However, HNF1β expression was not present in newly generated EpCAM-positive hepatocytes. Using a tamoxifen-inducible Hnf1βCreER/R26RYFP/LacZ mouse, we show that there is no contribution of the biliary epithelium to hepatocyte turnover during liver homeostasis in healthy mice. Moreover, after loss of liver mass, Hnf1β+ LPC did not contribute to hepatocyte regeneration. We also assessed the contribution of Hnf1β+ cells following acute and repeated liver injury. All animal models showed expansion of LPC, as assessed by immunostaining and gene expression profile of sorted YFP-positive cells. A contribution of Hnf1β+ LPC to hepatocyte generation was not detected in animal models of liver injury with preserved hepatocyte regenerative potential such as acute acetaminophen, carbon tetrachloride injury, or chronic diethoxycarbonyl-1,4-dihydro-collidin (DDC)-diet. However, in mice fed with choline-deficient ethionine-supplemented (CDE)-diet, which causes profound hepatocyte damage and arrest, a small number of hepatocytes were derived from Hnf1β+ cells. Conclusion: Hnf1β+ cells do not participate in hepatocyte turnover in the healthy liver or during liver regeneration after partial hepatectomy. After liver injury, LPC arise from the biliary duct epithelium, which gives rise to a limited number of hepatocytes only when hepatocyte regeneration is compromised. Transcriptomic profile using MoGeneST-2.0 chip from 3 samples of YFP+ CDE, 3 samples of YFP+ DDC, 2 samples of YFP+ UTR and 3 samples YFP-
2016-07-03 | E-GEOD-51389 | biostudies-arrayexpress
Project description:Induction of hepatocyte senescence is known to inhibit hepatocellular carcinoma (HCC). Until now, it has not been clear how the degree of liver injury dictates hepatocyte senescence and carcinogenesis. In this study, we investigated whether the severity of injury determines cell fate decisions between hepatocyte senescence and carcinogenesis. After testing of different degrees of liver injury, we found that hepatocyte senescence is strongly induced in the setting of severe acute liver injury. Longer-term, moderate liver injury did not result into hepatocyte senescence, but instead led to a significant incidence of HCC. In addition, carcinogenesis was significantly reduced by the induction of severe acute injury after chronic moderate liver injury. We conclude that severe acute liver injury leads to hepatocyte senescence along with a low incidence of HCC, whereas chronic moderate injury allows hepatocytes to proliferate rather than to enter into senescence, and correlates with a high incidence of HCC. This study improves our understanding in hepatocyte cell fate decisions and suggests a potential clinical strategy to induce senescence to treat HCC.
2018-12-20 | GSE108328 | GEO
Project description:Fifty percent of all acute liver failure (ALF) cases in the United States are due to acetaminophen (APAP) overdose. Assessment of canonical features of liver injury, such as plasma alanine aminotransferase activities are poor predictors of acute liver failure (ALF), suggesting the involvement of additional mechanisms independent of hepatocyte death. Previous work demonstrated a severe overdose of APAP results in impaired regeneration, the induction of senescence by p21, and increased mortality. We hypothesized that a discrete population of p21+ hepatocytes acquired a secretory phenotype that directly impedes liver recovery after a severe APAP overdose. Leveraging in-house human APAP explant liver and publicly available singlenuclei RNAseq data, we identified a subpopulation of p21+ hepatocytes enriched in a unique secretome of factors, such as Cxcl14. Spatial transcriptomics in the mouse model of APAP overdose confirmed the presence of a p21+ hepatocyte population that directly surrounded the necrotic areas. In both male and female mice, we found a dose-dependent induction of p21 and persistent circulating levels of the p21-specific constituent, Cxcl14, in the plasma after a severe APAP overdose. In parallel experiments, we targeted either the putative senescent hepatocytes with the senolytic drugs, dasatinib and quercetin, or Cxcl14 with a neutralizing antibody. We found that targeting Cxcl14 greatly enhanced liver recovery after APAP-induced liver injury, while targeting the senescent hepatocyte had no effect. This data supports that the sustained induction of p21 in hepatocytes with persistent Cxcl14 secretion are critical mechanistic events leading to ALF in mice and human patients.
2024-04-15 | GSE255834 | GEO
Project description:Fifty percent of all acute liver failure (ALF) cases in the United States are due to acetaminophen (APAP) overdose. Assessment of canonical features of liver injury, such as plasma alanine aminotransferase activities are poor predictors of acute liver failure (ALF), suggesting the involvement of additional mechanisms independent of hepatocyte death. Previous work demonstrated a severe overdose of APAP results in impaired regeneration, the induction of senescence by p21, and increased mortality. We hypothesized that a discrete population of p21+ hepatocytes acquired a secretory phenotype that directly impedes liver recovery after a severe APAP overdose. Leveraging in-house human APAP explant liver and publicly available singlenuclei RNAseq data, we identified a subpopulation of p21+ hepatocytes enriched in a unique secretome of factors, such as Cxcl14. Spatial transcriptomics in the mouse model of APAP overdose confirmed the presence of a p21+ hepatocyte population that directly surrounded the necrotic areas. In both male and female mice, we found a dose-dependent induction of p21 and persistent circulating levels of the p21-specific constituent, Cxcl14, in the plasma after a severe APAP overdose. In parallel experiments, we targeted either the putative senescent hepatocytes with the senolytic drugs, dasatinib and quercetin, or Cxcl14 with a neutralizing antibody. We found that targeting Cxcl14 greatly enhanced liver recovery after APAP-induced liver injury, while targeting the senescent hepatocyte had no effect. This data supports that the sustained induction of p21 in hepatocytes with persistent Cxcl14 secretion are critical mechanistic events leading to ALF in mice and human patients.
2024-04-15 | GSE255777 | GEO
Project description:We previously showed that severe liver diseases are characterized by expansion of liver progenitor cells (LPC), which correlates with disease severity. However, the origin and role of LPC in liver physiology and in the hepatic response to injury remains a contentious topic. We have now used genetic lineage tracing of Hnf1β-expressing biliary duct cells to assess their contribution to LPC expansion and hepatocyte generation during normal liver homeostasis, and following different types of liver injury. We found that ductular reaction cells in human cirrhotic livers express HNF1β. However, HNF1β expression was not present in newly generated EpCAM-positive hepatocytes. Using a tamoxifen-inducible Hnf1βCreER/R26RYFP/LacZ mouse, we show that there is no contribution of the biliary epithelium to hepatocyte turnover during liver homeostasis in healthy mice. Moreover, after loss of liver mass, Hnf1β+ LPC did not contribute to hepatocyte regeneration. We also assessed the contribution of Hnf1β+ cells following acute and repeated liver injury. All animal models showed expansion of LPC, as assessed by immunostaining and gene expression profile of sorted YFP-positive cells. A contribution of Hnf1β+ LPC to hepatocyte generation was not detected in animal models of liver injury with preserved hepatocyte regenerative potential such as acute acetaminophen, carbon tetrachloride injury, or chronic diethoxycarbonyl-1,4-dihydro-collidin (DDC)-diet. However, in mice fed with choline-deficient ethionine-supplemented (CDE)-diet, which causes profound hepatocyte damage and arrest, a small number of hepatocytes were derived from Hnf1β+ cells. Conclusion: Hnf1β+ cells do not participate in hepatocyte turnover in the healthy liver or during liver regeneration after partial hepatectomy. After liver injury, LPC arise from the biliary duct epithelium, which gives rise to a limited number of hepatocytes only when hepatocyte regeneration is compromised.
2016-01-01 | GSE51389 | GEO
Project description:BACKGROUND & AIMS: c-Jun N-terminal kinase (JNK)1 and JNK2 are expressed in hepatocytes and have overlapping and distinct functions. JNK proteins are activated, via phosphorylation, in response to acetaminophen- or CCl4-induced liver damage; the level of activation correlates with the degree of injury. SP600125, a JNK inhibitor, has been reported to block acetaminophen-induced liver injury. We investigated the role of JNK in drug-induced liver injury (DILI) in liver tissues from patients and in mice with genetic deletion of JNK in hepatocytes. METHODS: We studied liver sections from patients with DILI (due to acetaminophen, phenprocoumon, non-steroidal anti-inflammatory drugs or autoimmune hepatitis), or patients without acute liver failure (controls), collected from a DILI Biobank in Germany. Levels of total and activated (phosphorylated) JNK were measured by immunohistochemistry and western blotting. Mice with hepatocyte-specific deletion of Jnk1 (Jnk1Îhepa) or combination of Jnk1 and Jnk2 (JnkÎhepa), as well as Jnk1-floxed C57BL/6 (control) mice, were given injections of CCl4 (to induce fibrosis) or acetaminophen (to induce toxic liver injury). We performed gene expression microarray, and phosphoproteomic analyses to determine mechanisms of JNK activity in hepatocytes. RESULTS: Liver samples from DILI patients contained more activated JNK, predominantly in nuclei of hepatocytes and in immune cells, than healthy tissue. Administration of acetaminophen to JnkÎhepa mice produced a greater level of liver injury than that observed in Jnk1Îhepa or control mice, based on levels of serum markers and microscopic and histologic analysis of liver tissues. Administration of CCl4 also induced stronger hepatic injury in JnkÎhepa mice, based on increased inflammation, cell proliferation, and fibrosis progression, compared to Jnk1Îhepa or control mice. Hepatocytes from JnkÎhepa mice given acetaminophen had an increased oxidative stress response, leading to decreased activation of AMPK, total protein AMPK levels, and pJunD and subsequent necrosis. Administration of SP600125 before or with acetaminophen protected JnkÎhepa and control mice from liver injury. CONCLUSIONS: In hepatocytes, JNK1 and JNK2 appear to have combined effects in protecting mice from CCl4- and acetaminophen-induced liver injury. It is important to study the tissue-specific functions of both proteins, rather than just JNK1, in the onset of toxic liver injury. JNK inhibition with SP600125 shows off-target effects. Livers and primary hepatocytes were isolated from wild type and JNKÎhepa (Jnk1Îhepa/global Jnk2-/-) double-knockout mice and subjected to gene expression profiling.
2016-01-04 | E-GEOD-59602 | biostudies-arrayexpress
Project description:Overdose of acetaminophen (APAP) is the major cause of acute liver failure in the Western world with very limited treatment options. Previous studies from our groups and others have shown that timely activation of liver regeneration is a critical determinant of transplant-free survival of APAP-induced acute liver failure (ALF) patients. We used affy microarrays to explore the mechanisms of transcriptional expression in YAP-KO mice after 300mg/kg APAP overdose.
2021-10-04 | GSE183119 | GEO