Interleukin-32γ attenuates ethanol-induced liver injury by the inhibition of cytochrome P450 2E1 expression and inflammatory responses

2015 ◽  
Vol 128 (10) ◽  
pp. 695-706 ◽  
Author(s):  
Dong Hun Lee ◽  
Dae Hwan Kim ◽  
Chul Ju Hwang ◽  
Sukgil Song ◽  
Sang Bae Han ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Cytochrome P450 ◽  
Liver Disease ◽  
Liver Injury ◽  
Chronic Liver Disease ◽  
Inflammatory Responses ◽  
Chronic Liver ◽  
Ethanol Administration ◽  
Cytochrome P450 2E1 ◽  
Primary Hepatocytes

Alcohol abuse and alcoholism lead to alcoholic liver disease (ALD), which is a major type of chronic liver disease worldwide. Interleukin-32 (IL-32) is a novel cytokine involved in inflammation and cancer development. However, the role of IL-32 in chronic liver disease has not been reported. In the present paper, we tested the effect of IL-32γ on ethanol-induced liver injury in IL-32γ-overexpressing transgenic mice (IL-32γ mice) after chronic ethanol feeding. Male C57BL/6 and IL-32γ mice (10–12 weeks old) were fed on a Lieber–DeCarli diet containing 6.6% ethanol for 6 weeks. IL-32γ-transfected HepG2 and Huh7 cells, as well as primary hepatocytes from IL-32γ mice, were treated with or without ethanol. The hepatic steatosis and damage induced by ethanol administration were attenuated in IL-32γ mice. Ethanol-induced cytochrome P450 2E1 expression and hydrogen peroxide levels were decreased in the livers of IL-32γ mice, primary hepatocytes from IL-32γ mice and IL-32γ-overexpressing human hepatic cells. The ethanol-induced expression levels of cyclo-oxygenase-2 (COX-2) and IL-6 were reduced in the livers of IL-32γ mice. Because nuclear transcription factor κB (NF-κB) is a key redox transcription factor of inflammatory responses, we examined NF-κB activity. Ethanol-induced NF-κB activities were significantly lower in the livers of IL-32γ mice than in wild-type (WT) mice. Furthermore, reduced infiltration of natural killer cells, cytotoxic T-cells and macrophages in the liver after ethanol administration was observed in IL-32γ mice. These data suggest that IL-32γ prevents ethanol-induced hepatic injury via the inhibition of oxidative damage and inflammatory responses.

scholarly journals Possible unrecognised liver injury is associated with mortality in critically ill COVID-19 patients

2021 ◽  
Vol 14 ◽  
pp. 175628482110234
Author(s):  
Mario Romero-Cristóbal ◽  
Ana Clemente-Sánchez ◽  
Patricia Piñeiro ◽  
Jamil Cedeño ◽  
Laura Rayón ◽  
...  
Keyword(s):  
Liver Disease ◽  
Liver Fibrosis ◽  
Liver Injury ◽  
Chronic Liver Disease ◽  
Critically Ill ◽  
Cox Regression ◽  
Chronic Liver ◽  
Cox Regression Analysis ◽  
Risk Of Death ◽  
The Impact

Background: Coronavirus disease (COVID-19) with acute respiratory distress syndrome is a life-threatening condition. A previous diagnosis of chronic liver disease is associated with poorer outcomes. Nevertheless, the impact of silent liver injury has not been investigated. We aimed to explore the association of pre-admission liver fibrosis indices with the prognosis of critically ill COVID-19 patients. Methods: The work presented was an observational study in 214 patients with COVID-19 consecutively admitted to the intensive care unit (ICU). Pre-admission liver fibrosis indices were calculated. In-hospital mortality and predictive factors were explored with Kaplan–Meier and Cox regression analysis. Results: The mean age was 59.58 (13.79) years; 16 patients (7.48%) had previously recognised chronic liver disease. Up to 78.84% of patients according to Forns, and 45.76% according to FIB-4, had more than minimal fibrosis. Fibrosis indices were higher in non-survivors [Forns: 6.04 (1.42) versus 4.99 (1.58), p < 0.001; FIB-4: 1.77 (1.17) versus 1.41 (0.91), p = 0.020)], but no differences were found in liver biochemistry parameters. Patients with any degree of fibrosis either by Forns or FIB-4 had a higher mortality, which increased according to the severity of fibrosis ( p < 0.05 for both indexes). Both Forns [HR 1.41 (1.11–1.81); p = 0.006] and FIB-4 [HR 1.31 (0.99–1.72); p = 0.051] were independently related to survival after adjusting for the Charlson comorbidity index, APACHE II, and ferritin. Conclusion: Unrecognised liver fibrosis, assessed by serological tests prior to admission, is independently associated with a higher risk of death in patients with severe COVID-19 admitted to the ICU.

scholarly journals Chronic liver disease not a significant comorbid condition for COVID-19

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jiahao Lin ◽  
Bingting Bao ◽  
Nigar Anjuman Khurram ◽  
Kasey Halsey ◽  
Ji Whae Choi ◽  
...  
Keyword(s):  
Liver Disease ◽  
Liver Injury ◽  
Chronic Liver Disease ◽  
The United States ◽  
Postmortem Examination ◽  
Chronic Liver ◽  
Critical Groups ◽  
Comorbid Condition ◽  
Central Vein ◽  
Significant Difference

AbstractTo explore the role of chronic liver disease (CLD) in COVID-19. A total of 1439 consecutively hospitalized patients with COVID-19 from one large medical center in the United States from March 16, 2020 to April 23, 2020 were retrospectively identified. Clinical characteristics and outcomes were compared between patients with and without CLD. Postmortem examination of liver in 8 critically ill COVID-19 patients was performed. There was no significant difference in the incidence of CLD between critical and non-critical groups (4.1% vs 2.9%, p = 0.259), or COVID-19 related liver injury between patients with and without CLD (65.7% vs 49.7%, p = 0.065). Postmortem examination of liver demonstrated mild liver injury associated central vein outflow obstruction and minimal to moderate portal lymphocytic infiltrate without evidence of CLD. Patients with CLD were not associated with a higher risk of liver injury or critical/fatal outcomes. CLD was not a significant comorbid condition for COVID-19.

scholarly journals Kratom-Induced Cholestatic Liver Injury and Its Conservative Management

2019 ◽  
Vol 7 ◽  
pp. 232470961983613 ◽  
Author(s):  
Christopher T. Fernandes ◽  
Umair Iqbal ◽  
Sean P. Tighe ◽  
Aijaz Ahmed
Keyword(s):  
Liver Disease ◽  
Liver Injury ◽  
Chronic Liver Disease ◽  
The United States ◽  
Chronic Liver ◽  
Herbal Supplement ◽  
Herbal Supplements ◽  
Drug Induced ◽  
Drug Induced Liver Injury ◽  
Analgesic Effects

Drug-induced liver injury (DILI) is a common cause of hepatotoxicity associated with prescription-based and over-the-counter exposure to medications and herbal supplements. Use of unapproved and inadequately tested herbal supplements can cause DILI. Therefore, thorough history-taking on exposure to herbal supplements must be an integral part of clinical evaluation of DILI. Kratom is an herbal supplement or remedy that has been known for its analgesic effects and has also been used for self-treatment of opiate withdrawals. A 52-year-old man was seen for evaluation of yellow discoloration of the eyes and skin. He reported taking kratom for right shoulder strain for at least a couple of months. On workup, his total bilirubin was noted to be 23.2 mg/dL, which peaked at 28.9 mg/dL. He was noted to have mild elevation of aspartate aminotransferase, alanine aminotransferase, and alkaline phosphatase. Extensive laboratory tests were ordered and known causes of chronic liver disease ruled out. Magnetic resonance imaging of the abdomen was unremarkable without stigmata of portal hypertension or signs of chronic liver disease. He demonstrated no evidence of coagulopathy or hepatic encephalopathy during his illness. He underwent liver biopsy, which demonstrated histologic evidence of acute cholestatic hepatitis highly suspicious of DILI. He was advised to avoid kratom or other herbal supplements in future and prescribed ursodeoxycholic acid with significant improvement in his liver chemistries. Kratom is associated with significant liver enzymes derangements leading to DILI. Kratom is not approved for use in the United States and should be avoided.

Increased hepatic fibrosis and JNK2-dependent liver injury in mice exhibiting hepatocyte-specific deletion of cFLIP

2012 ◽  
Vol 303 (4) ◽  
pp. G498-G506 ◽  
Author(s):  
Jörn M. Schattenberg ◽  
Michael Nagel ◽  
Yong Ook Kim ◽  
Tobias Kohl ◽  
Marcus A. Wörns ◽  
...  
Keyword(s):  
Liver Disease ◽  
Liver Injury ◽  
Chronic Liver Disease ◽  
Hepatic Fibrosis ◽  
Chronic Liver ◽  
Hepatocellular Injury ◽  
Inhibitory Protein ◽  
Hepatocellular Apoptosis ◽  
Specific Deletion

Chronic liver disease promotes hepatocellular injury involving apoptosis and triggers compensatory regeneration that leads to the activation of quiescent stellate cells in the liver. The deposition of extracellular matrix from activated myofibroblasts promotes hepatic fibrosis and the progression to cirrhosis with deleterious effects on liver physiology. The role of apoptosis signaling pathways in the development of fibrosis remains undefined. The aim of the current study was to determine the involvement of the caspase-8 homologue cellular FLICE-inhibitory protein (cFLIP) during the initiation and progression of fibrosis. Liver injury and fibrosis from carbon tetrachloride (CCl4) and thioacetamide (TAA) were examined in mice exhibiting a hepatocyte-specific deletion of cFLIP ( flip −/−). Acute liver injury from CCl4 and TAA were enhanced in flip −/− mice. This was accompanied by increased activation of caspase-3 and -9, pronounced phosphorylation of JNK, and decreased phosphorylation of Erk. Deletion of the cJun NH2-terminal kinase 2 (JNK2) in flip −/− mice protected from injury. Hepatic fibrosis was increased at baseline in 12-wk-old flip −/− mice, and progression of fibrosis from TAA was accelerated compared with the wild type. In conclusion, deletion of cFLIP in hepatocytes leads to increased fibrosis and accelerated fibrosis progression. This is accompanied by increased injury involving the activation of caspases and JNK2. Thus predisposition to liver injury involving increased hepatocellular apoptosis is a critical mediator of accelerated fibrogenesis, and prevention of liver injury will be a most important measure for patients with chronic liver disease.

Pathobiology of chronic liver disease

2020 ◽  
pp. 3043-3048
Author(s):  
Wajahat Z. Mehal
Keyword(s):  
Liver Disease ◽  
Liver Injury ◽  
Chronic Liver Disease ◽  
Bacterial Infections ◽  
Immune Cell ◽  
Basic Structure ◽  
Chronic Liver ◽  
Sterile Inflammation ◽  
Oesophageal Varices ◽  
Haemodynamic Changes

Chronic liver disease is responsible for most of the clinical burden of liver disease. Chronic liver injury can occur via a variety of mechanisms, including sterile inflammation and activation of innate and adaptive immunity. Despite the diversity of disease aetiologies and the ability of the liver to regenerate, a significant minority of patients with chronic liver disease proceed to liver fibrosis and eventually cirrhosis, which is defined histologically by regenerative hepatocyte nodules surrounded by fibrous bands of matrix. Ongoing liver injury stimulates the development of a myofibroblast cell type which is responsible for matrix remodelling, haemodynamic changes, and immune cell regulation. This typically results in repair without significant modification of the basic liver structure. In a few subjects, this repair process results in alterations of the basic structure of the liver with loss of hepatocyte mass, deposition of collagen, and the development of hypertension in the portal venous system. Although cirrhosis is well defined histologically, there is a spectrum of severity. In early cirrhosis, patients are asymptomatic but with increasing derangement in hepatic function and portal hypertension, patients can decompensate and develop ascites, coagulopathy, encephalopathy, jaundice, renal failure, oesophageal varices, and spontaneous bacterial infections. Management is focused on removing or reducing ongoing liver injury, and managing cirrhosis-related complications by the use of low-salt diets, diuretics, β‎-blockers, endoscopic therapy, vasopressors, and antibiotics. There is, as yet, no definite role for antifibrotic medications.

scholarly journals Alcohol Metabolizing Enzymes, Microsomal Ethanol Oxidizing System, Cytochrome P450 2E1, Catalase, and Aldehyde Dehydrogenase in Alcohol-Associated Liver Disease

Biomedicines ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 50 ◽  
Author(s):  
Yanchao Jiang ◽  
Ting Zhang ◽  
Praveen Kusumanchi ◽  
Sen Han ◽  
Zhihong Yang ◽  
...  
Keyword(s):  
Cytochrome P450 ◽  
Liver Disease ◽  
Liver Injury ◽  
Alcohol Dehydrogenase ◽  
Redox State ◽  
Kinetic Properties ◽  
Cytochrome P450 2E1 ◽  
Metabolizing Enzymes ◽  
Allelic Variants ◽  
Downstream Signaling

Once ingested, most of the alcohol is metabolized in the liver by alcohol dehydrogenase to acetaldehyde. Two additional pathways of acetaldehyde generation are by microsomal ethanol oxidizing system (cytochrome P450 2E1) and catalase. Acetaldehyde can form adducts which can interfere with cellular function, leading to alcohol-induced liver injury. The variants of alcohol metabolizing genes encode enzymes with varied kinetic properties and result in the different rate of alcohol elimination and acetaldehyde generation. Allelic variants of these genes with higher enzymatic activity are believed to be able to modify susceptibility to alcohol-induced liver injury; however, the human studies on the association of these variants and alcohol-associated liver disease are inconclusive. In addition to acetaldehyde, the shift in the redox state during alcohol elimination may also link to other pathways resulting in activation of downstream signaling leading to liver injury.

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