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Chen Y, Yin Z, Zhang X, Zhao Y, Liu T, Lu WY, Wang S. Increased GABA signaling in liver macrophage promotes HBV replication in HBV-carrier mice. Virus Res 2024; 344:199366. [PMID: 38548137 PMCID: PMC10998195 DOI: 10.1016/j.virusres.2024.199366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 03/23/2024] [Accepted: 03/25/2024] [Indexed: 04/02/2024]
Abstract
Gamma-aminobutyric acid (GABA) signals in various non-neuronal cells including hepatocytes and some immune cells. Studies, including ours, show that type A GABA receptors (GABAARs)-mediated signaling occurs in macrophages regulating tissue-specific functions. Our recent study reveals that activation of GABAARs in liver macrophages promotes their M2-like polarization and increases HBV replication in mice. This short article briefly summarizes the GABA signaling system in macrophages and discusses potential mechanisms by which GABA signaling promotes HBV replication.
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Affiliation(s)
- Yunling Chen
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Zhaoqing Yin
- Department of Physiology and Pathophysiology, School of Basic Medical Science, Shandong University, Jinan, China
| | - Xiaonan Zhang
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China; School of Clinical and Basic Medical Sciences, Shandong First Medical University& Shandong Academy of Medical Sciences, Jinan, China
| | - Yiwei Zhao
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China; School of Clinical and Basic Medical Sciences, Shandong First Medical University& Shandong Academy of Medical Sciences, Jinan, China
| | - Tinghao Liu
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China; School of Clinical and Basic Medical Sciences, Shandong First Medical University& Shandong Academy of Medical Sciences, Jinan, China
| | - Wei-Yang Lu
- Department of Physiology and Pharmacology, Robarts Research Institute, University of Western Ontario, Canada.
| | - Shuanglian Wang
- Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China.
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2
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Wang Y, Wang D, Wang K, Weng S, Zheng R, Liu X, Zhao L, Li C, Hu Z. Litchi pulp-derived gamma-aminobutyric acid (GABA) extract counteracts liver inflammation induced by litchi thaumatin-like protein. Food Funct 2024; 15:4818-4831. [PMID: 38606579 DOI: 10.1039/d3fo05463b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
Gamma-aminobutyric acid (GABA) is the predominant amino acid in litchi pulp, known for its neuroregulatory effects and anti-inflammatory properties. Although previous research has highlighted the pro-inflammatory characteristics of litchi thaumatin-like protein (LcTLP), interplay between GABA and LcTLP in relation to inflammation remains unclear. This study aims to explore the hepatoprotective effects of the litchi pulp-derived GABA extract (LGE) against LcTLP-induced liver inflammation in mice and LO2 cells. In vivo experiments demonstrated that LGE significantly reduced the levels of aspartate transaminase and alanine transaminase, and protected the liver against infiltration of CD4+ and CD8+ T cells and histological injury induced by LcTLP. Pro-inflammatory cytokines including interleukin-6, interleukin-1β, and tumor necrosis factor-α were also diminished by LGE. The LGE appeared to modulate the mitogen-activated protein kinase (MAPK) signaling pathway to exert its anti-inflammatory effects, as evidenced by a reduction of 47%, 35%, and 31% in phosphorylated p38, JNK, and ERK expressions, respectively, in the liver of the high-dose LGE group. Additionally, LGE effectively improved the translocation of gut microbiota by modulating its microbiological composition and abundance. In vitro studies have shown that LGE effectively counteracts the increase in reactive oxygen species, calcium ions, and pro-inflammatory cytokines induced by LcTLP. These findings may offer new perspectives on the health benefits and safety of litchi consumption.
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Affiliation(s)
- Yao Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
| | - Dongwei Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
| | - Kai Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
| | - Shaoquan Weng
- Guangzhou Wanglaoji Great Health Industry Co., Ltd, Guangzhou 510623, China
| | - Rongbo Zheng
- Guangzhou Wanglaoji Great Health Industry Co., Ltd, Guangzhou 510623, China
| | - Xuwei Liu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
| | - Lei Zhao
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
| | - Chuyuan Li
- Guangzhou Pharmaceutical Holding Limited, Guangzhou 510130, China.
| | - Zhuoyan Hu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
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Rohbeck E, Niersmann C, Köhrer K, Wachtmeister T, Roden M, Eckel J, Romacho T. Positive allosteric GABA A receptor modulation counteracts lipotoxicity-induced gene expression changes in hepatocytes in vitro. Front Physiol 2023; 14:1106075. [PMID: 36860523 PMCID: PMC9968943 DOI: 10.3389/fphys.2023.1106075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 01/31/2023] [Indexed: 02/16/2023] Open
Abstract
Introduction: We have previously shown that the novel positive allosteric modulator of the GABAA receptor, HK4, exerts hepatoprotective effects against lipotoxicity-induced apoptosis, DNA damage, inflammation and ER stress in vitro. This might be mediated by downregulated phosphorylation of the transcription factors NF-κB and STAT3. The current study aimed to investigate the effect of HK4 on lipotoxicity-induced hepatocyte injury at the transcriptional level. Methods: HepG2 cells were treated with palmitate (200 μM) in the presence or absence of HK4 (10 μM) for 7 h. Total RNA was isolated and the expression profiles of mRNAs were assessed. Differentially expressed genes were identified and subjected to the DAVID database and Ingenuity Pathway Analysis software for functional and pathway analysis, all under appropriate statistical testing. Results: Transcriptomic analysis showed substantial modifications in gene expression in response to palmitate as lipotoxic stimulus with 1,457 differentially expressed genes affecting lipid metabolism, oxidative phosphorylation, apoptosis, oxidative and ER stress among others. HK4 preincubation resulted in the prevention of palmitate-induced dysregulation by restoring initial gene expression pattern of untreated hepatocytes comprising 456 genes. Out of the 456 genes, 342 genes were upregulated and 114 downregulated by HK4. Enriched pathways analysis of those genes by Ingenuity Pathway Analysis, pointed towards oxidative phosphorylation, mitochondrial dysregulation, protein ubiquitination, apoptosis, and cell cycle regulation as affected pathways. These pathways are regulated by the key upstream regulators TP53, KDM5B, DDX5, CAB39 L and SYVN1, which orchestrate the metabolic and oxidative stress responses including modulation of DNA repair and degradation of ER stress-induced misfolded proteins in the presence or absence of HK4. Discussion: We conclude that HK4 specifically targets mitochondrial respiration, protein ubiquitination, apoptosis and cell cycle. This not only helps to counteract lipotoxic hepatocellular injury through modification of gene expression, but - by targeting transcription factors responsible for DNA repair, cell cycle progression and ER stress - might even prevent lipotoxic mechanisms. These findings suggest that HK4 has a great potential for the treatment of non-alcoholic fatty liver disease (NAFLD).
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Affiliation(s)
- Elisabeth Rohbeck
- German Diabetes Center, Institute for Clinical Diabetology, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany,German Center for Diabetes Research (DZD), Partner Düsseldorf, München-Neuherberg, Germany,CureDiab Metabolic Research GmbH, Düsseldorf, Germany
| | - Corinna Niersmann
- German Diabetes Center, Institute for Clinical Diabetology, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany,German Center for Diabetes Research (DZD), Partner Düsseldorf, München-Neuherberg, Germany,CureDiab Metabolic Research GmbH, Düsseldorf, Germany
| | - Karl Köhrer
- Biological and Medical Research Centre (BMFZ), Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Thorsten Wachtmeister
- Biological and Medical Research Centre (BMFZ), Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Michael Roden
- German Diabetes Center, Institute for Clinical Diabetology, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany,German Center for Diabetes Research (DZD), Partner Düsseldorf, München-Neuherberg, Germany,Department of Endocrinology and Diabetology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Jürgen Eckel
- German Diabetes Center, Institute for Clinical Diabetology, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany,CureDiab Metabolic Research GmbH, Düsseldorf, Germany
| | - Tania Romacho
- German Diabetes Center, Institute for Clinical Diabetology, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany,Chronic Complications of Diabetes Lab (ChroCoDiL), Department of Nursing Sciences, Physiotherapy and Medicine, Faculty of Health Sciences, University of Almería, Almería, Spain,*Correspondence: Tania Romacho,
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Fu K, Gao X, Hua P, Huang Y, Dong R, Wang M, Li Q, Li Z. Anti-obesity effect of Angelica keiskei Jiaosu prepared by yeast fermentation on high-fat diet-fed mice. Front Nutr 2023; 9:1079784. [PMID: 36698478 PMCID: PMC9868866 DOI: 10.3389/fnut.2022.1079784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 12/16/2022] [Indexed: 01/11/2023] Open
Abstract
In this study, an Angelica keiskei (A. keiskei) Jiaosu (FAK) was prepared by yeast fermentation to investigate its anti-obesity effect on high-fat diet (HFD)-fed mice. 70 SPF grade male C57BL/6J mice were randomly divided into 7 groups (n = 10): blank control group (N), high-fat model group (M), positive control group (Orl), unfermented control group (NF), high-dose intervention group (FH), medium-dose intervention group (FM), and low-dose intervention group (FL). The results showed that FAK intervention significantly reduced the body weight, Lee's index and liver index of HFD-fed mice (P < 0.05). Compared with M group, the serum levels of triglyceride (TG), total cholesterol (TC), leptin and glucose (GLU) in FH group were remarkably decreased and that of interleukin-27 (IL-27) were increased (P < 0.05). The levels of TG, and TC in the liver of mice were also markedly decreased in the FH group (P < 0.05). HE staining results showed that the liver cells in the three intervention groups had less degeneration and fatty vacuoles in the cytoplasm, and the liver cords were orderly arranged compared with that of M group. Furthermore, FAK significantly inhibited epididymal adipose tissue cell expansion induced by HFD. FAK up-regulated the protein expression levels of p-AMPK and PPARα to promote lipolysis and down-regulated the expression of PPARγ to reduce lipid synthesis (P < 0.05). Additionally, the results of gut microbiota showed that after the intervention, a decrease trend of F/B value and Deferribacterota was noticed in the FH group compared with M group. At the genus level, FAK intervention significantly increased that of Ileiobacterium compared to the M group (p < 0.05). A rising trend of norank_f_Muribaculaceae, Lactobacillus, and Bifidobacterium were also observed in the HF group. Conclusively, these findings demonstrated that FAK intervention can effectively improve obesity in mice caused by HFD and the potential mechanisms was related to the regulation of serum levels of leptin and IL-27, lipogenesis and lipolysis in adipose tissue and gut microbiota composition.
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Affiliation(s)
- Kunli Fu
- College of Life Sciences, Institute of Biomedical Engineering, Qingdao University, Qingdao, China
| | - Xiang Gao
- College of Life Sciences, Institute of Biomedical Engineering, Qingdao University, Qingdao, China,Anqiu Huatao Food Co., Ltd., Weifang, China
| | - Puyue Hua
- College of Life Sciences, Institute of Biomedical Engineering, Qingdao University, Qingdao, China
| | - Yuedi Huang
- College of Life Sciences, Institute of Biomedical Engineering, Qingdao University, Qingdao, China
| | - Ruitao Dong
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, China
| | - Mingji Wang
- Joint Institute of Angelica keiskei Health Industry Technology, Qingdao Balanson Biotech Co., Ltd., Qingdao, China
| | - Qun Li
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, China,Joint Institute of Angelica keiskei Health Industry Technology, Qingdao Balanson Biotech Co., Ltd., Qingdao, China
| | - Zichao Li
- College of Life Sciences, Institute of Biomedical Engineering, Qingdao University, Qingdao, China,Joint Institute of Angelica keiskei Health Industry Technology, Qingdao Balanson Biotech Co., Ltd., Qingdao, China,*Correspondence: Zichao Li,
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Chen Q, Gao Y, Yang F, Deng H, Wang Y, Yuan L. Angiotensin-converting enzyme 2 improves hepatic insulin resistance by regulating GABAergic signaling in the liver. J Biol Chem 2022; 298:102603. [PMID: 36265585 PMCID: PMC9668738 DOI: 10.1016/j.jbc.2022.102603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 11/07/2022] Open
Abstract
The angiotensin-converting enzyme 2 (ACE2)/angiotensin 1-7/MAS axis and the gamma-aminobutyric acid (GABA)ergic signaling system have both been shown to have the dual potential to improve insulin resistance (IR) and hepatic steatosis associated with obesity in the liver. Recent studies have demonstrated that ACE2 can regulate the GABA signal in various tissues. Notwithstanding this evidence, the functional relationship between ACE2 and GABA signal in the liver under IR remains elusive. Here, we used high-fat diet-induced models of IR in C57BL/6 mice as well as ACE2KO and adeno-associated virus-mediated ACE2 overexpression mouse models to address this knowledge gap. Our analysis showed that glutamate decarboxylase (GAD)67/GABA signaling was weakened in the liver during IR, whereas the expression of GAD67 and GABA decreased significantly in ACE2KO mice. Furthermore, exogenous administration of angiotensin 1-7 and adeno-associated virus- or lentivirus-mediated overexpression of ACE2 significantly increased hepatic GABA signaling in models of IR both in vivo and in vitro. We found that this treatment prevented lipid accumulation and promoted fatty acid β oxidation in hepatocytes as well as inhibited the expression of gluconeogenesis- and inflammation-related genes, which could be reversed by allylglycine, a specific GAD67 inhibitor. Collectively, our findings show that signaling via the ACE2/A1-7/MAS axis can improve hepatic IR by regulating hepatic GABA signaling. We propose that this research might indicate a potential strategy for the management of diabetes.
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Rohbeck E, Hasse B, Koopmans G, Romero A, Belgardt BF, Roden M, Eckel J, Romacho T. Positive allosteric γ-aminobutyric acid type A receptor modulation prevents lipotoxicity-induced injury in hepatocytes in vitro. Diabetes Obes Metab 2022; 24:1498-1508. [PMID: 35434888 DOI: 10.1111/dom.14719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/08/2022] [Accepted: 04/12/2022] [Indexed: 11/29/2022]
Abstract
AIM To determine if a novel positive allosteric modulator of the γ-aminobutyric acid type A (GABAA ) receptor, the thioacrylamide-derivative HK4, which does not penetrate the blood-brain barrier, protects human hepatocytes against lipotoxicity-induced injury. MATERIALS AND METHODS Allosteric modulation of the GABAA receptor by HK4 was determined by patch clamp in HEK-293 cells, calcium influx in INS-1E cells and by using the specific GABAA channel blockers picrotoxin and tert-butylbicyclophosphorothionate (TBPS) in HepG2 cells. Apoptosis was analysed using caspase 3/7, terminal deoxynucleotidyl transferase-dUTP nick end labelling (TUNEL) and array assays in HepG2 cells and/or human primary hepatocytes. Phosphorylation of STAT3 and the NF-κB subunit p65, protein disulphide isomerase (PDI) and poly-ADP-ribose polymerase-1 (PARP-1) was detected by Western blotting. RESULTS Patch clamping, calcium influx measurements and apoptosis assays with the non-competitive GABAA channel blockers picrotoxin and TBPS proved HK4 as a selective positive allosteric modulator of the GABAA receptor. In HepG2 cells, which expressed the main GABAA receptor subunits, HK4 prevented palmitate-induced apoptosis. This protective effect was mediated by downregulation of caspase 3/7 activity and was additionally verified by TUNEL assay. HK4 effectively prevented palmitate-induced apoptosis in human primary hepatocytes. HK4 reduced STAT3 and NF-κB phosphorylation, reduced cleaved PARP-1 expression and upregulated the endoplasmic reticulum (ER) chaperone PDI. CONCLUSIONS HK4 reduced lipotoxic-induced apoptosis by preventing inflammation, DNA damage and ER stress. We propose that the effect of HK4 is mediated by STAT3 and NF-κB. It is suggested that thioacrylamide compounds represent an innovative pharmacological tool to treat or prevent non-alcoholic steatohepatitis as first-in-class drugs.
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Affiliation(s)
- Elisabeth Rohbeck
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | | | | | - Alejandra Romero
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Bengt-Frederik Belgardt
- Institute for Vascular and Islet Cell Biology, German Diabetes Center at Heinrich Heine University, Leibniz Center for Diabetes Research, Düsseldorf, Germany
- German Center for Diabetes Research (DZD), Partner Düsseldorf, München-Neuherberg, Germany
| | - Michael Roden
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
- German Center for Diabetes Research (DZD), Partner Düsseldorf, München-Neuherberg, Germany
- Department of Endocrinology and Diabetology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Jürgen Eckel
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Tania Romacho
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
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Khanlarkhani S, Akbarzadeh AR, Rahimi R. A retrospective-prospective survey of porphyrinoid fluorophores: towards new architectures as an electron transfer systems promoter. J INCL PHENOM MACRO 2022. [DOI: 10.1007/s10847-022-01147-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Explorative study of serum biomarkers of liver failure after liver resection. Sci Rep 2020; 10:9960. [PMID: 32561884 PMCID: PMC7305107 DOI: 10.1038/s41598-020-66947-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 05/27/2020] [Indexed: 02/07/2023] Open
Abstract
Conventional biochemical markers have limited usefulness in the prediction of early liver dysfunction. We, therefore, tried to find more useful liver failure biomarkers after liver resection that are highly sensitive to internal and external challenges in the biological system with a focus on liver metabolites. Twenty pigs were divided into the following 3 groups: sham operation group (n = 6), 70% hepatectomy group (n = 7) as a safety margin of resection model, and 90% hepatectomy group (n = 7) as a liver failure model. Blood sampling was performed preoperatively and at 1, 6, 14, 30, 38, and 48 hours after surgery, and 129 primary metabolites were profiled. Orthogonal projection to latent structures-discriminant analysis revealed that, unlike in the 70% hepatectomy and sham operation groups, central carbon metabolism was the most significant factor in the 90% hepatectomy group. Binary logistic regression analysis was used to develop a predictive model for mortality risk following hepatectomy. The recommended variables were malic acid, methionine, tryptophan, glucose, and γ-aminobutyric acid. Area under the curve of the linear combination of five metabolites was 0.993 (95% confidence interval: 0.927–1.000, sensitivity: 100.0, specificity: 94.87). We proposed robust biomarker panels that can accurately predict mortality risk associated with hepatectomy.
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Park NH, Lee SJ, Mechesso AF, Boby N, Yixian Q, Yoon WK, Lee SP, Lee JS, Park SC. Hepatoprotective effects of gamma-aminobutyric acid-enriched fermented Hovenia dulcis extract on ethanol-induced liver injury in mice. BMC Complement Med Ther 2020; 20:75. [PMID: 32143613 PMCID: PMC7076742 DOI: 10.1186/s12906-020-2866-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 02/26/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Various extracts of Hovenia dulcis have been commonly used in Asia for cases of alcohol-related disorders. Fermentation is reported to enhance the level and biological activities of various bio-constituents of plant extracts. Therefore, this study was undertaken to evaluate the effects of fermented H. dulcis extract (FHDE) on ethanol-induced liver injury in mice. METHODS FHDE was prepared using Bacillus subtilis and Lactobacillus plantarum. The effects of FHDE on ethanol-induced liver injury were evaluated in C57BL/6 N CrSlc mice. A mixed feed preparation containing the fermented extract with and without ethanol was given to mice for 29 days, according to its group. At the end of the experiment, blood and liver samples were collected from all mice in the group. Plasma biochemical analysis and histopathological investigation were performed to evaluate the impacts of treatment on the biomarkers of hepatic damage and inflammatory changes. Besides, the expression of genes that regulate the activities of enzymes associated with alcohol metabolism, antioxidant activity, and fatty acid oxidation was assessed using a quantitative real-time polymerase chain reaction. Moreover, the amino acid contents and the active ingredients of the extract were evaluated before and after fermentation. RESULTS Fermentation resulted in a marked increase and decrease in the amount of Gamma-Amino-n-butyric acid (GABA) and glutamic acid, respectively. FHDE enhanced the body weight gain of mice compared to ethanol. Besides, plasma levels of triglyceride, low-density lipoprotein, the activities of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were significantly (P < 0.05) reduced in the FHDE-treated groups relative to the ethanol-treated control. FHDE upregulated the expression of genes associated with enzymes involved in alcohol dehydrogenation (Adh1 and Aldh2), antioxidant activity (SOD and CAT), and fatty acid oxidation (PPAR-α and PGC-1α). However, the expressions of Cytochrome peroxidase Cyp2E1 and genes related to lipogenesis (SREBP-1c, FAS, SCD-1, and ACC) were significantly (P < 0.05) downregulated following treatment with the FHDE. Histopathological investigation demonstrated a slight degree of inflammatory cell infiltration and occasional fatty changes in the FHDE-treated groups. CONCLUSION The GABA-enriched fermented H. dulcis extract prevented ethanol-induced hepatic damage by enhancing the antioxidant defense system, fatty acid oxidation, and reducing lipogenesis.
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Affiliation(s)
- Na-Hye Park
- College of Veterinary Medicine, Kyungpook National University, 80, Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
| | - Seung-Jin Lee
- College of Veterinary Medicine, Kyungpook National University, 80, Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
| | - Abraham Fikru Mechesso
- College of Veterinary Medicine, Kyungpook National University, 80, Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
| | - Naila Boby
- College of Veterinary Medicine, Kyungpook National University, 80, Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
| | - Quah Yixian
- College of Veterinary Medicine, Kyungpook National University, 80, Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
| | - Woong-Kyu Yoon
- Department of Food Science and Technology, Keimyung University, Daegu, 42601 Republic of Korea
| | - Sam-Pin Lee
- College of Veterinary Medicine, Kyungpook National University, 80, Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
| | - Jong-Suk Lee
- Biocenter, Gyeonggido Business and Science Accelerator (GBSA), Suwon, Gyeonggi-do 16229 Republic of Korea
| | - Seung-Chun Park
- College of Veterinary Medicine, Kyungpook National University, 80, Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
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Liu Z, Li Q, Shen R, Ci L, Wan Z, Shi J, Huang Q, Yang X, Zhang M, Yang H, Sun R, Wang Z, Huang F, Lu T, Fei J. Betaine/GABA transporter-1 (BGT-1) deficiency in mouse prevents acute liver failure in vivo and hepatocytes apoptosis in vitro. Biochim Biophys Acta Mol Basis Dis 2019; 1866:165634. [PMID: 31830527 DOI: 10.1016/j.bbadis.2019.165634] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 09/06/2019] [Accepted: 12/04/2019] [Indexed: 01/13/2023]
Abstract
Betaine/γ-aminobutyric acid (GABA) transporter 1 (BGT-1 or Slc6a12) is a transporter for the neurotransmitter GABA and osmolyte betaine. To date, most studies on BGT-1 have focused on its functions in the nervous system and renal osmotic homeostasis. Despite its dominant distribution in the liver, the function of BGT-1 in hepatic physiology or disease remains unknown. Here, we report that BGT-1 was significantly downregulated in patients with liver failure as well as in mice with experimental acute liver failure (ALF). Furthermore, mice deficient in BGT-1 showed significant resistance to ALF compared with wild type (WT) mice, manifesting as improved survival rate, reduced alanine transaminase/aspartate aminotransferase levels, better histopathological symptoms and fewer apoptotic cells in the liver. Similarly, in primary hepatocytes, BGT-1 deficiency or treatment with a BGT-1 inhibitor, NNC 05-2090, attenuated TNF-α mediated apoptosis. In addition, BGT-1 deficiency or dosing with NNC 05-2090 stimulated the expression of the anti-apoptotic gene, c-Met in the liver, suggesting the involvement of c-Met in the function on hepatocytes of BGT-1 apoptosis. Our findings suggest BGT-1 is a promising candidate drug target to prevent and treat hepatocyte apoptosis related diseases, such as ALF.
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Affiliation(s)
- Zhenze Liu
- School of Life Science and Technology, Tongji University. Shanghai, China
| | - Qing Li
- School of Life Science and Technology, Tongji University. Shanghai, China; Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology & Institutes of Brain Science, Fudan University, Shanghai, China
| | - Ruling Shen
- Shanghai Laboratory Animal Research Center, Shanghai, China; Joint Laboratory for Model Organism, Shanghai Laboratory Animal Research Center and School of Life Science and Technology, Tongji University
| | - Lei Ci
- Shanghai Engineering Research Center for Model Organisms, SMOC, Shanghai, China
| | - Zhipeng Wan
- School of Life Science and Technology, Tongji University. Shanghai, China
| | - Jiahao Shi
- School of Life Science and Technology, Tongji University. Shanghai, China
| | - Qin Huang
- Shanghai Engineering Research Center for Model Organisms, SMOC, Shanghai, China
| | - Xu Yang
- School of Life Science and Technology, Tongji University. Shanghai, China
| | - Mengjie Zhang
- School of Life Science and Technology, Tongji University. Shanghai, China
| | - Hua Yang
- School of Life Science and Technology, Tongji University. Shanghai, China
| | - Ruilin Sun
- Shanghai Engineering Research Center for Model Organisms, SMOC, Shanghai, China
| | - Zhugang Wang
- Shanghai Engineering Research Center for Model Organisms, SMOC, Shanghai, China
| | - Fang Huang
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology & Institutes of Brain Science, Fudan University, Shanghai, China
| | - Tianfei Lu
- Department of Liver Surgery and Liver Transplantation Center, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
| | - Jian Fei
- School of Life Science and Technology, Tongji University. Shanghai, China; Shanghai Engineering Research Center for Model Organisms, SMOC, Shanghai, China; Joint Laboratory for Model Organism, Shanghai Laboratory Animal Research Center and School of Life Science and Technology, Tongji University.
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11
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Heo MJ, Kim TH, You JS, Blaya D, Sancho-Bru P, Kim SG. Alcohol dysregulates miR-148a in hepatocytes through FoxO1, facilitating pyroptosis via TXNIP overexpression. Gut 2019; 68:708-720. [PMID: 29475852 PMCID: PMC6581021 DOI: 10.1136/gutjnl-2017-315123] [Citation(s) in RCA: 158] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 01/29/2018] [Accepted: 01/31/2018] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Alcoholic liver disease (ALD) is a leading cause of death among chronic liver diseases. However, its pathogenesis has not been completely established. MicroRNAs (miRNAs) are key contributors to liver diseases progression. This study investigated hepatocyte-abundant miRNAs dysregulated by ALD, its impact on hepatocyte injury and the underlying basis. DESIGN Alcoholic hepatitis (AH) human and animal liver samples and hepatocytes were used to assess miR-148a levels. Pre-miR-148a was delivered specifically to hepatocytes in vivo using lentivirus. Immunoblottings, luciferase reporter assays, chromatin immunoprecipitation and immunofluorescence assays were carried out in cell models. RESULTS The miRNA profile and PCR analyses enabled us to find substantial decrease of miR-148a in the liver of patients with AH. In mice subjected to Lieber-DeCarli alcohol diet or binge alcohol drinking, miR-148a levels were also markedly reduced. In cultured hepatocytes and mouse livers, alcohol exposure inhibited forkhead box protein O1 (FoxO1) expression, which correlated with miR-148a levels and significantly decreased in human AH specimens. FoxO1 was identified as a transcription factor for MIR148A transactivation. MiR-148a directly inhibited thioredoxin-interacting protein (TXNIP) expression. Consequently, treatment of hepatocytes with ethanol resulted in TXNIP overexpression, activating NLRP3 inflammasome and caspase-1-mediated pyroptosis. These events were reversed by miR-148a mimic or TXNIP small-interfering RNA transfection. Hepatocyte-specific delivery of miR-148a to mice abrogated alcohol-induced TXNIP overexpression and inflammasome activation, attenuating liver injury. CONCLUSION Alcohol decreases miR-148a expression in hepatocytes through FoxO1, facilitating TXNIP overexpression and NLRP3 inflammasome activation, which induces hepatocyte pyroptosis. Our findings provide information on novel targets for reducing incidence and progression of ALD.
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Affiliation(s)
- Mi Jeong Heo
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, Republic of Korea
| | - Tae Hyun Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, Republic of Korea
| | - Jueng Soo You
- Department of Biochemistry, School of Medicine, Konkuk University, Seoul, Republic of Korea
| | - Delia Blaya
- Laboratory of Liver Cell Plasticity and Tissue Repair, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Centro de Investigación Biomédica en Red de Enfermedades Hepáticasy Digestivas (CIBERehd), Barcelona, Spain
| | - Pau Sancho-Bru
- Laboratory of Liver Cell Plasticity and Tissue Repair, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Centro de Investigación Biomédica en Red de Enfermedades Hepáticasy Digestivas (CIBERehd), Barcelona, Spain
| | - Sang Geon Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, Republic of Korea
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12
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Zhu Z, Shi Z, Xie C, Gong W, Hu Z, Peng Y. A novel mechanism of Gamma-aminobutyric acid (GABA) protecting human umbilical vein endothelial cells (HUVECs) against H 2O 2-induced oxidative injury. Comp Biochem Physiol C Toxicol Pharmacol 2019; 217:68-75. [PMID: 30500452 DOI: 10.1016/j.cbpc.2018.11.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 11/15/2018] [Accepted: 11/25/2018] [Indexed: 12/18/2022]
Abstract
Vascular endothelial cell damage is related to many vascular diseases, including cardiovascular disease (CVD). Reactive oxygen species (ROS) play a vital role in the pathogenesis of many cardiovascular diseases. Herein, H2O2-induced human umbilical vein endothelial cell (HUVEC) injury model was used to explore the mechanisms involved in the pathogenesis of ROS-induced oxidative stress and cell dysfunction. Gamma-aminobutyric acid (GABA), a naturally occurring four-carbon non-protein amino acid, has antioxidant activity and anti-inflammatory action. In the present study, we demonstrated that GABA could scavenge free radicals including DPPH and ABTS, reverse H2O2-induced suppression on HUVEC proliferation, HUVEC apoptosis and ROS formation via p65 signaling. Interestingly, GABA treatment alone did not cause significant changes in p65 phosphorylation, suggesting that GABA will not cause imbalance in NF-κB signaling and ROS formation without oxidative stress. Moreover, GABA also modulated Keap1-Nrf2 and Notch signaling pathways upon H2O2 stimulation, suggesting that GABA may exert its effect via multi mechanisms. In conclusion, the present study demonstrated that GABA inhibits H2O2-induced oxidative stress in HUVECs via inhibiting ROS-induced NF-κB and Caspase 3 pathway activation. GABA may, therefore, have potential as a pharmacological agent in the prevention or treatment of oxidative injury-related cardiovascular disease.
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Affiliation(s)
- Zuohua Zhu
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, China; Center for Southern Economic Crops, Chinese Academy of Agricultural Sciences, China
| | - Zhigang Shi
- Huayuan Tianle Fu Agriculture Technology Co. Ltd., China
| | - Chunliang Xie
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, China; Center for Southern Economic Crops, Chinese Academy of Agricultural Sciences, China
| | - Wenbing Gong
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, China; Center for Southern Economic Crops, Chinese Academy of Agricultural Sciences, China
| | - Zhenxiu Hu
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, China; Center for Southern Economic Crops, Chinese Academy of Agricultural Sciences, China
| | - Yuande Peng
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, China; Center for Southern Economic Crops, Chinese Academy of Agricultural Sciences, China.
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13
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Kubota A, Kobayashi M, Sarashina S, Takeno R, Yasuda G, Narumi K, Furugen A, Takahashi-Suzuki N, Iseki K. Gamma-Aminobutyric Acid (GABA) Attenuates Ischemia Reperfusion-Induced Alterations in Intestinal Immunity. Biol Pharm Bull 2018; 41:1874-1878. [DOI: 10.1248/bpb.b18-00338] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Atsuhito Kubota
- Laboratory of Clinical Pharmaceutics & Therapeutics, Division of Pharmasciences, Faculty of Pharmaceutical Sciences, Hokkaido University
| | | | - Sota Sarashina
- Laboratory of Clinical Pharmaceutics & Therapeutics, Division of Pharmasciences, Faculty of Pharmaceutical Sciences, Hokkaido University
| | - Reiko Takeno
- Laboratory of Clinical Pharmaceutics & Therapeutics, Division of Pharmasciences, Faculty of Pharmaceutical Sciences, Hokkaido University
| | - Genki Yasuda
- Laboratory of Clinical Pharmaceutics & Therapeutics, Division of Pharmasciences, Faculty of Pharmaceutical Sciences, Hokkaido University
| | - Katsuya Narumi
- Laboratory of Clinical Pharmaceutics & Therapeutics, Division of Pharmasciences, Faculty of Pharmaceutical Sciences, Hokkaido University
| | - Ayako Furugen
- Laboratory of Clinical Pharmaceutics & Therapeutics, Division of Pharmasciences, Faculty of Pharmaceutical Sciences, Hokkaido University
| | | | - Ken Iseki
- Laboratory of Clinical Pharmaceutics & Therapeutics, Division of Pharmasciences, Faculty of Pharmaceutical Sciences, Hokkaido University
- Department of Pharmacy, Hokkaido University Hospital
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14
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Highly selective detection of spermine in human urine via a nanometal surface energy transfer platform. Talanta 2018; 188:218-224. [DOI: 10.1016/j.talanta.2018.05.086] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/16/2018] [Accepted: 05/24/2018] [Indexed: 01/07/2023]
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15
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Chen Y, Li J, Yuan Z, Feng J, Chen Z. Metabolic fate and subchronic biological effects of core-shell structured Fe 3O 4@SiO 2-NH 2 nanoparticles. Nanotoxicology 2018; 12:621-636. [PMID: 29745273 DOI: 10.1080/17435390.2018.1471537] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Core-shell structured Fe3O4@SiO2-NH2 nanoparticles (Fe@Si-NPs) demonstrated outstanding potentials in drug targeting and delivery and medical imaging. However, they have limited clinical applications due to unknown chronic bio-effects and potential bio-related risks. In this study, the subchronic biological effects and metabolic fate of 20 nm Fe@Si-NPs in Sprague-Dawley rats in 12 weeks were investigated by the biochemical assay and NMR-based metabonomic analysis using an intravenous model. Biofluids (plasma and urine) analysis provided the transportation, absorption, and excretion information of Fe@Si-NPs. Urine metabonome displayed a metabolic recovery while self-regulation of plasma metabonome leaded to the parallel metabolic trends between dosed and control groups in 12 weeks. And biological tissues (spleen, liver, kidney, and lung) analysis indicated liver and spleen are the targeted-organs of Fe@Si-NPs. The obvious metabolic variations responding to the biodistribution were induced by Fe@Si-NPs although no visible toxic effects were observed in these tissues. Besides the common energy metabolism response to the xenobiotics, Fe@Si-NPs also disturbed the metabolic pathways in glycerophospholipid and sphingolipid metabolism, metabolisms of purine, pyrimidine, and nicotinate. Our results provide preliminary validation for the potential use of Fe@Si-NPs in clinical medicine and give identifiable ground for the dose selection and bio-nanoagent optimization.
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Affiliation(s)
- Yueli Chen
- a Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance , Xiamen University , Xiamen , China
| | - Jinquan Li
- a Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance , Xiamen University , Xiamen , China.,b School of Pharmaceutical Science (Shenzhen) , Sun Yat-sen University , Guangzhou , China
| | - Zhongxue Yuan
- a Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance , Xiamen University , Xiamen , China
| | - Jianghua Feng
- a Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance , Xiamen University , Xiamen , China
| | - Zhong Chen
- a Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance , Xiamen University , Xiamen , China
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16
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Wang S, Xiang YY, Zhu J, Yi F, Li J, Liu C, Lu WY. Protective roles of hepatic GABA signaling in acute liver injury of rats. Am J Physiol Gastrointest Liver Physiol 2017; 312:G208-G218. [PMID: 27979827 DOI: 10.1152/ajpgi.00344.2016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 12/05/2016] [Accepted: 12/12/2016] [Indexed: 01/31/2023]
Abstract
γ-Aminobutyric acid (GABA) is produced by various cells through the catalytic activity of glutamic acid decarboxylase (GAD). Activation of type-A GABA receptor (GABAAR) inhibits stem cell proliferation but protects differentiated cells from injures. The present study investigated hepatic GABA signaling system and the role of this system in liver physiology and pathophysiology. RT-PCR and immunoblot assays identified GAD and GABAAR subunits in rat livers and in HepG2 and Clone 9 hepatocytes. Patch-clamp recording detected GABA-induced currents in Clone 9 hepatocytes and depolarization in WITT cholangiocytes. The function of hepatic GABA signaling system in rats was examined using models of d-galactosamine (GalN)-induced acute hepatocytic injury in vivo and in vitro. The expression of GAD increased whereas GABAAR subunits decreased in the liver of GalN-treated rats. Remarkably, treating rats with GABA or the GABAAR agonist muscimol, but not the GABABR agonist baclofen, protected hepatocytes against GalN toxicity and improved liver function. In addition, muscimol treatment decreased the formation of pseudobile ductules and the enlargement of hepatocytic canaliculi in GalN-treated rats. Our results revealed that a complex GABA signaling system exists in the rat liver. Activation of this intrahepatic GABAergic system protected the liver against toxic injury.NEW & NOTEWORTHY Auto- and paracrine GABAergic signaling systems exist in the rat hepatocytes and cholangiocytes. Activation of GABA signaling protects liver function from d-galactosamine injury by reducing toxic impairment of hepatocytes and by decreasing cholangiocyte proliferation.
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Affiliation(s)
- Shuanglian Wang
- Department of Physiology, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China.,Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada.,Robarts Research Institute, University of Western Ontario, London, Ontario, Canada.,Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario, Canada; and
| | - Yun-Yan Xiang
- Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada.,Robarts Research Institute, University of Western Ontario, London, Ontario, Canada.,Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario, Canada; and
| | - Jianchun Zhu
- Department of Physiology, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China
| | - Fan Yi
- Department of Pharmacology, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China
| | - Jingxin Li
- Department of Physiology, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China.,Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario, Canada; and
| | - Chuanyong Liu
- Department of Physiology, Shandong University School of Medicine, Jinan, Shandong, People's Republic of China;
| | - Wei-Yang Lu
- Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada; .,Robarts Research Institute, University of Western Ontario, London, Ontario, Canada.,Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario, Canada; and
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Anti-fibrotic and anti-inflammatory effects of parboiled germinated brown rice ( Oryza sativa ‘KDML 105’) in rats with induced liver fibrosis. J Funct Foods 2016. [DOI: 10.1016/j.jff.2016.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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18
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Wunjuntuk K, Kettawan A, Charoenkiatkul S, Rungruang T. Parboiled Germinated Brown Rice Protects Against CCl4-Induced Oxidative Stress and Liver Injury in Rats. J Med Food 2016; 19:15-23. [DOI: 10.1089/jmf.2015.3460] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Kansuda Wunjuntuk
- Food Chemistry Division, Institute of Nutrition, Mahidol University, Nakhon Pathom, Thailand
| | - Aikkarach Kettawan
- Food Chemistry Division, Institute of Nutrition, Mahidol University, Nakhon Pathom, Thailand
| | - Somsri Charoenkiatkul
- Food Chemistry Division, Institute of Nutrition, Mahidol University, Nakhon Pathom, Thailand
| | - Thanaporn Rungruang
- Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Brewers' Rice: A By-Product from Rice Processing Provides Natural Hepatorenal Protection in Azoxymethane-Induced Oxidative Stress in Rats. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:539798. [PMID: 26257841 PMCID: PMC4516842 DOI: 10.1155/2015/539798] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 06/30/2015] [Indexed: 02/07/2023]
Abstract
Brewers' rice, which is known locally as temukut, is a mixture of broken rice, rice bran, and rice germ. Our present study was designed to identify the effect of brewers' rice on the attenuation of liver and kidney damage induced by azoxymethane (AOM). Alanine transaminase (ALT), alkaline phosphatase (ALP), aspartate transaminase (AST), creatinine, and urea were evaluated to understand potential hepatoprotective effects and the ability of brewers' rice to attenuate kidney pathology induced by AOM treatment. Liver and kidney tissues were evaluated by hematoxylin and eosin (H&E) staining. Overall analyses revealed that brewers' rice improved the levels of serum markers in a manner associated with better histopathological outcomes, which indicated that brewers' rice could enhance recovery from hepatocyte and kidney damage. Taken together, these results suggest that brewers' rice could be used in future applications to combat liver and kidney disease.
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20
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In Vivo Antioxidant and Hypolipidemic Effects of Fermented Mung Bean on Hypercholesterolemic Mice. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:508029. [PMID: 26074993 PMCID: PMC4449930 DOI: 10.1155/2015/508029] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 07/21/2014] [Indexed: 12/03/2022]
Abstract
Legumes have previously been reported with hypolipidemic effect caused by the presence of flavonoid. This study was carried out to evaluate the antioxidant and hypolipidemic effects of fermented mung bean on hypercholesterolemic mice. Blood from all mice was collected and subjected to serum lipid and liver profiles biochemical analysis and quantitative RT-PCR for atherosclerosis related gene expressions. Besides, livers were collected for antioxidant assays and histopathology evaluation. Fermented mung bean was found to reduce the level of serum lipid and liver enzyme profiles of hypercholesterolemic mice. Furthermore, liver antioxidant and nitric oxide levels were also significantly restored by fermented mung bean in a dosage dependent manner. The gene expression study indicated that Apoe and Bcl2a1a were upregulated while Npy and Vwf expressions were downregulated after the treatment. The effects of fermented mung bean were greater than nonfermented mung bean. These results indicated that fermented mung bean possessed antioxidants that lead to its hypolipidemic effect on hypercholesterolemic mice.
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Lelevich VV, Vinitskaya AG, Lelevich SV, Doroshenko YM. [Particularities of γ-aminobutyric acid metabolism in the liver of rats during different types of alcohol withdrawal]. BIOMEDITSINSKAIA KHIMIIA 2014; 60:561-566. [PMID: 25386885 DOI: 10.18097/pbmc20146005561] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Activities of GABA-catabolising enzymes and the contents of some amino acids have been studied in the liver of the rats with different types of alcohol cessation after its systemic administration. Intermittent alcohol intoxication was accompanied by activation of liver GABA catabolism in case of the lowest alcohol load. However ethanol in higher doses and prolongation of intermittent alcohol administration decreased GABA catabolism. It is suggested that the observed changes may reflect non-specific adaptation of hepatocytes to the excessive alcohol consumption and its further cessation.
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22
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Kwon HJ, Kim SH, Hwang JH, Park YD. Determination of γ-aminobutyric acid in leaf, stem and root bark of mulberry by high-performance anion exchange chromatography-integrated pulsed amperometric detection. ACTA CHROMATOGR 2013. [DOI: 10.1556/achrom.25.2013.3.13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Uemura T, Tanaka Y, Higashi K, Miyamori D, Takasaka T, Nagano T, Toida T, Yoshimoto K, Igarashi K, Ikegaya H. Acetaldehyde-induced cytotoxicity involves induction of spermine oxidase at the transcriptional level. Toxicology 2013; 310:1-7. [PMID: 23707493 DOI: 10.1016/j.tox.2013.05.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 05/05/2013] [Accepted: 05/15/2013] [Indexed: 01/08/2023]
Abstract
Ethanol consumption causes serious liver injury including cirrhosis and hepatocellular carcinoma. Ethanol is metabolized mainly in the liver to acetic acid through acetaldehyde. We investigated the effect of ethanol and acetaldehyde on polyamine metabolism since polyamines are essential factors for normal cellular functions. We found that acetaldehyde induced spermine oxidase (SMO) at the transcriptional level in HepG2 cells. The levels and activities of ornithine decarboxylase (ODC) and spermidine/spermine acetyltransferase (SSAT) were not affected by acetaldehyde. Spermidine content was increased and spermine content was decreased by acetaldehyde treatment. Knockdown of SMO expression using siRNA reduced acetaldehyde toxicity. Acetaldehyde exposure increased free acrolein levels. An increase of acrolein by acetaldehyde was SMO dependent. Our results indicate that cytotoxicity of acetaldehyde involves, at least in part, oxidation of spermine to spermidine by SMO, which is induced by acetaldehyde.
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Affiliation(s)
- Takeshi Uemura
- Department of Forensic Medicine, Kyoto Prefectural University of Medicine, Graduate School of Medical Sciences, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
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Hori T, Gardner LB, Hata T, Chen F, Baine AMT, Uemoto S, Nguyen JH. Pretreatment of liver grafts in vivo by γ-aminobutyric acid receptor regulation reduces cold ischemia/warm reperfusion injury in rat. Ann Transplant 2013; 18:299-313. [PMID: 23792534 DOI: 10.12659/aot.883955] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Gamma-aminobutyric acid (GABA) is found throughout the body. The regulation of GABA receptor (GABAR) reduces oxidative stress (OS). Ischemia/reperfusion injury after orthotopic liver transplantation (OLT) causes OS-induced graft damage. The effects of GABAR regulation in donors in vivo were investigated. MATERIAL AND METHODS Donor rats received saline, a GABAR agonist or GABAR antagonist 4 h before surgery. Recipient rats were divided into four groups according to the donor treatments: laparotomy, OLT with saline, OLT with GABAR agonist and OLT with GABAR antagonist. Histopathological, biochemical and immunohistological examinations were performed at 6, 12 and 24 h after OLT. Protein assays were performed at 6 h after OLT. The 4-hydroxynonenal (4-HNE), ataxia-telangiectasia mutated kinase (ATM), phosphorylated histone H2AX (gammaH2AX), phosphatidylinositol-3 kinase (PI3K), Akt and superoxide dismutase (SOD) were assessed by western blot analysis. RESULTS In the univariate analysis, histopathological and biochemical profiles verified that the GABAR agonist reduced graft damage. Immunohistology revealed that the GABAR agonist prevented the induction of apoptosis. Measurement of 4-4-HNE levels confirmed OS-induced damage after OLT, and the GABAR agonist improved this damage. In the gammaH2AX, PI3K, Akt and antioxidant enzymes (SODs), ATM and H2AX were greatly increased after OLT, and were reduced by the GABAR agonist. In the multivariate analyses between multiple groups, histopathological assessment, aspartate aminotransferase level, immunohistological examinations for apoptotic induction and gammaH2AX showed statistical differences. CONCLUSIONS A specific agonist demonstrated regulation of GABAR in vivo in the liver. This activation in vivo reduced OS after OLT via the ATM/H2AX pathway.
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Affiliation(s)
- Tomohide Hori
- Department of Neuroscience, Mayo Clinic in Florida, Jacksonville, FL, USA.
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Pretreatment of Small-for-Size Grafts In Vivo by γ -Aminobutyric Acid Receptor Regulation against Oxidative Stress-Induced Injury in Rat Split Orthotopic Liver Transplantation. Int J Hepatol 2013; 2013:149123. [PMID: 24223309 PMCID: PMC3817746 DOI: 10.1155/2013/149123] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Accepted: 08/15/2013] [Indexed: 02/06/2023] Open
Abstract
Background. Graft pretreatment to limit postoperative damage has the advantage of overcoming a current issue in liver transplantation (LT). The strategic potential of graft pretreatment in vivo by a specific agonist for γ -aminobutyric acid receptor (GABAR) was investigated in the rat LT model with a small-for-size graft (SFSG). Methods. Recipient rats were divided into three groups according to donor treatments and recipient surgeries: (i) saline and laparotomy, (ii) saline and split orthotopic liver transplantation (SOLT) with 40%-SFSG, and (iii) GABAR agonist and SOLT with 40%-SFSG. Survival was evaluated. Blood and liver samples were collected 6 h after surgery. Immunohistological assessment for apoptotic induction and western blotting for 4-hydroxynonenal, ataxia-telangiectasia mutated kinase (ATM), histone H2AX, phosphatidylinositol-3 kinase (PI3K), Akt, and free radical scavenging enzymes were performed. Results. Pretreatment by GABAR showed improvement in survival, histopathological assessment, and biochemical tests. Apoptotic induction and oxidative stress were observed after SOLT with an SFSG, and this damage was limited by GABAR regulation. GABAR regulation appeared to reduce DNA damage via the ATM/H2AX pathway and to promote cell survival via the PI3K/Akt pathway. Conclusions. Pretreatment in vivo by GABAR regulation improves graft damage after SOLT with an SFSG. This strategy may be advantageous in LT.
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Antioxidant and hepatoprotective effect of aqueous extract of germinated and fermented mung bean on ethanol-mediated liver damage. BIOMED RESEARCH INTERNATIONAL 2012; 2013:693613. [PMID: 23484140 PMCID: PMC3591205 DOI: 10.1155/2013/693613] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 10/25/2012] [Accepted: 10/26/2012] [Indexed: 01/15/2023]
Abstract
Mung bean is a hepatoprotective agent in dietary supplements. Fermentation and germination processes are well recognized to enhance the nutritional values especially the concentration of active compounds such as amino acids and GABA of various foods. In this study, antioxidant and hepatoprotective effects of freeze-dried mung bean and amino-acid- and GABA-enriched germinated and fermented mung bean aqueous extracts were compared. Liver superoxide dismutase (SOD), malondialdehyde (MDA), ferric reducing antioxidant power (FRAP), nitric oxide (NO) levels, and serum biochemical profile such as aspartate transaminase (AST), alanine transaminase (ALT), triglycerides (TG), and cholesterol and histopathological changes were examined for the antioxidant and hepatoprotective effects of these treatments. Germinated and fermented mung bean have recorded an increase of 27.9 and 7.3 times of GABA and 8.7 and 13.2 times of amino acid improvement, respectively, as compared to normal mung bean. Besides, improvement of antioxidant levels, serum markers, and NO level associated with better histopathological evaluation indicated that these extracts could promote effective recovery from hepatocyte damage. These results suggested that freeze-dried, germinated, and fermented mung bean aqueous extracts enriched with amino acids and GABA possessed better hepatoprotective effect as compared to normal mung bean.
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Gardner LB, Hori T, Chen F, Baine AMT, Hata T, Uemoto S, Nguyen JH. Effect of specific activation of γ-aminobutyric acid receptor in vivo on oxidative stress-induced damage after extended hepatectomy. Hepatol Res 2012; 42:1131-40. [PMID: 22583816 PMCID: PMC3438378 DOI: 10.1111/j.1872-034x.2012.01030.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
AIM γ-Aminobutyric acid (GABA) is a multifunctional molecule with various physiological effects throughout the body. The regulation of GABA receptor (GABAR) plays a key role in reducing the damage mediated by oxidative stress (OS). Extended hepatectomy causes fatal OS-induced injury in the liver remnant. We aimed to investigate the effect of a GABAR agonist in extended hepatectomy. METHODS Saline or a GABAR agonist (43.56 nmol/g bodyweight of muscimol) was administrated intravenously at 4 h preoperatively. C57BL/6 mice were divided into three groups: laparotomy only, 90% hepatectomy with saline and 90% hepatectomy with a GABAR agonist. Liver samples were obtained at 6 h after surgery. RESULTS Survival curves were prolonged by the GABAR agonist. Histopathological findings and biochemical profiles showed that the GABAR agonist reduced liver damage. Immunohistological assessment demonstrated that the GABAR agonist prevented apoptotic induction. As shown by 4-hydroxynonenal, which reflects OS-induced damage, 90% hepatectomy caused OS and the GABAR agonist reduced OS. We measured ataxia-telangiectasia mutated kinase (ATM), H2AX, Akt and free radical scavenging enzymes because they may be affected by GABAR regulation, and found that Akt was greatly decreased after 90% hepatectomy, but it recovered with the GABAR agonist. CONCLUSION GABAR is activated by a specific agonist in the liver in vivo. This activation reduces OS-mediated damage after extended hepatectomy in vivo, and the mechanism via an Akt-dependent pathway may be a key.
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Affiliation(s)
- Lindsay B. Gardner
- Department of Neuroscience, Mayo Clinic in Florida, Jacksonville, Florida, USA
| | - Tomohide Hori
- Department of Neuroscience, Mayo Clinic in Florida, Jacksonville, Florida, USA,Division of Hepato-Biliary-Pancreatic, Transplant and Pediatric Surgery, Department of Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Feng Chen
- Department of Neuroscience, Mayo Clinic in Florida, Jacksonville, Florida, USA
| | - Ann-Marie T. Baine
- Department of Neuroscience, Mayo Clinic in Florida, Jacksonville, Florida, USA
| | - Toshiyuki Hata
- Department of Neuroscience, Mayo Clinic in Florida, Jacksonville, Florida, USA,Division of Hepato-Biliary-Pancreatic, Transplant and Pediatric Surgery, Department of Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Shinji Uemoto
- Division of Hepato-Biliary-Pancreatic, Transplant and Pediatric Surgery, Department of Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Justin H. Nguyen
- Division of Transplant Surgery, Department of Transplantation, Mayo Clinic in Florida, Jacksonville, Florida, USA
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Do THT, Gaboriau F, Morel I, Lepage S, Cannie I, Loréal O, Lescoat G. Modulation of ethanol effect on hepatocyte proliferation by polyamines. Amino Acids 2012; 44:869-77. [DOI: 10.1007/s00726-012-1413-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2012] [Accepted: 09/28/2012] [Indexed: 01/16/2023]
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Hori T, Gardner LB, Chen F, Baine AMT, Hata T, Uemoto S, Nguyen JH. Liver graft pretreated in vivo or ex vivo by γ-aminobutyric acid receptor regulation. J Surg Res 2012; 182:166-75. [PMID: 23010512 DOI: 10.1016/j.jss.2012.08.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2012] [Revised: 08/26/2012] [Accepted: 08/28/2012] [Indexed: 12/16/2022]
Abstract
BACKGROUND γ-Aminobutyric acid exists throughout the body, and the brain γ-aminobutyric acid receptor (GABAR) regulation reduces oxidative stress (OS). Effects of GABAR regulation in the liver are unknown. Ischemia or reperfusion injury after orthotopic liver transplantation (OLT) or shear stress after split OLT (SOLT) with a small-for-size graft causes OS-induced graft damage. Here, the strategic potential of graft pretreatment in vivo and ex vivo by GABAR regulation was investigated. MATERIALS AND METHODS Recipient rats were divided into seven groups according to the graft pretreatments and graft types: (1) laparotomy, (2) OLT, (3) GABAR regulation in vivo and OLT, (4) GABAR regulation ex vivo and OLT, (5) SOLT, (6) GABAR regulation in vivo and SOLT, and (7) GABAR regulation ex vivo and SOLT. Survival study, biochemical assays, histopathologic or immunohistologic assessments, and Western blotting were performed at 6 h after OLT or SOLT. RESULTS Graft pretreatment in vivo prolonged survival after SOLT. Histopathologic and biochemical profiles verified that graft pretreatment in vivo reduced graft damage after OLT or SOLT. Immunohistologically, graft pretreatment in vivo prevented apoptotic inductions after OLT or SOLT. The 4-hydroxynonenal confirmed the OS after OLT or SOLT, and graft pretreatment in vivo improved the OS. Graft pretreatment in vivo decreased ataxia-telangiectasia-mutated kinase and H2AX after OLT or SOLT. Graft pretreatment in vivo increased phosphatidylinositol 3 kinase and Akt after SOLT. In contrast, GABAR regulation ex vivo did not work. CONCLUSIONS Graft pretreatment in vivo, not ex vivo, prevented the ischemia or reperfusion injury-mediated OS after OLT or SOLT via the ataxia-telangiectasia-mutated kinase/H2AX pathway and the shear stress-mediated OS after SOLT with small-for-size graft via the phosphatidylinositol 3 kinase/Akt pathway.
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Affiliation(s)
- Tomohide Hori
- Division of Transplant and Pediatric Surgery, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
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Effects of live Lactobacillus paracasei on plasma lipid concentration in rats fed an ethanol-containing diet. Biosci Biotechnol Biochem 2012; 76:232-7. [PMID: 22313752 DOI: 10.1271/bbb.110390] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The protective effects of live Lactobacillus paracasei NFRI 7415 on alcoholic liver disease were investigated. Male Fischer 344 rats were fed a control diet (CD), an ethanol diet (ED) (35.8% of total energy from ethanol), or an ethanol diet containing 20% live Lb. paracasei NFRI 7415 (10(7) cfu/g) (LD) for 10 weeks. The results indicated that live Lb. paracasei NFRI 7415 reduced the total cholesterol concentration of the plasma and liver in the rats fed the LD. The level of docosahexaenoic acid (DHA; 22:6n-3) in the plasma and liver of the LD group was higher than in the ED group. Chronic alcohol consumption decreased the level of n-3 fatty acid in the plasma and liver of the ED group. These results indicated that live Lb. paracasei NFRI 7415 can adjust the fatty acid composition of the plasma and liver, and that it is possible to decrease liver damage due to chronic alcohol intake.
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Peterson LA, Phillips MB, Lu D, Sullivan MM. Polyamines are traps for reactive intermediates in furan metabolism. Chem Res Toxicol 2011; 24:1924-36. [PMID: 21842885 PMCID: PMC3221807 DOI: 10.1021/tx200273z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Furan is toxic and carcinogenic in rodents. Because of the large potential for human exposure, furan is classified as a possible human carcinogen. The detailed mechanism by which furan causes toxicity and cancer is not yet known. Since furan toxicity requires cytochrome P450-catalyzed oxidation of furan, we have characterized the urinary and hepatocyte metabolites of furan to gain insight into the chemical nature of the reactive intermediate. Previous studies in hepatocytes indicated that furan is oxidized to the reactive α,β-unsaturated dialdehyde, cis-2-butene-1,4-dial (BDA), which reacts with glutathione (GSH) to form 2-(S-glutathionyl)succinaldehyde (GSH-BDA). This intermediate forms pyrrole cross-links with cellular amines such as lysine and glutamine. In this article, we demonstrate that GSH-BDA also forms cross-links with ornithine, putrescine, and spermidine when furan is incubated with rat hepatocytes. The relative levels of these metabolites are not completely explained by hepatocellular levels of the amines or by their reactivity with GSH-BDA. Mercapturic acid derivatives of the spermidine cross-links were detected in the urine of furan-treated rats, which indicates that this metabolic pathway occurs in vivo. Their detection in furan-treated hepatocytes and in urine from furan-treated rats indicates that polyamines may play an important role in the toxicity of furan.
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Affiliation(s)
- Lisa A Peterson
- Division of Environmental Health Sciences, University of Minnesota, Minneapolis, Minnesota 55455, USA.
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Tuoi Do TH, Gaboriau F, Ropert M, Moirand R, Cannie I, Brissot P, Loréal O, Lescoat G. Ethanol Effect on Cell Proliferation in the Human Hepatoma HepaRG Cell Line: Relationship With Iron Metabolism. Alcohol Clin Exp Res 2010; 35:408-19. [DOI: 10.1111/j.1530-0277.2010.01358.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Ruan X, Shen C, Meng Q. Establishment of a methodology for investigating protectants against ethanol-induced hepatotoxicity. Food Chem Toxicol 2010; 48:1145-51. [PMID: 20138203 DOI: 10.1016/j.fct.2010.02.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2009] [Revised: 01/21/2010] [Accepted: 02/01/2010] [Indexed: 01/12/2023]
Abstract
Ethanol-induced liver injury has been extensively reported in clinic, but still lacks an efficient in vitro platform for investigating its hepatotoxicity and protectants. This study aimed to establish a methodology on the culture conditions regarding the sealability against evaporation of ethanol, culture medium and 2D/3D culture of hepatocytes. Based on the experimental findings, it was indicated that the ethanol evaporation from culture plates was a severe problem reducing its toxicity in hepatocyte. According to the detected ethanol toxic response marked by reduced cell viability, 3D cultured hepatocytes in gel entrapment were suggested to be better than 2D hepatocyte in monolayer, but the cultures in either William's Medium E or DMEM exhibited comparable sensitivity to ethanol toxicity. Subsequently, 3D cultured hepatocytes with Parafilm sealing were systematically illustrated to well reflect the ethanol-induced lipid accumulation, reactive oxygen species/malondialdehyde generation, glutathione depletion and cytochrome 2E1 induction. Finally, such hepatocyte models were proposed as a platform for screening of herbal component against ethanol hepatotoxicity. Nano-silibinin, for the first time, found to perform significant protection against ethanol-induced hepatotoxicity while silibinin in normal particles could not inhibit such toxicity. This protection of nano-silibinin might relate to its improved bioavailability compared to normal insoluble silibinin and could act as an anti-oxidative and anti-steatosis agent against ethanol-induced hepatotoxicity.
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Affiliation(s)
- Xueqing Ruan
- College of Materials Science and Chemical Engineering, Zhejiang University, 38 Zheda Road, Zhejiang, PR China
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Abstract
Physiological polyamines are ubiquitous polycations with pleiotropic biochemical activities, including regulation of gene expression, cell proliferation and modulation of cell signalling. Reports that the polyamines with cytoprotective activities were induced by diverse stresses raised the hypothesis that physiological polyamines may play a role in inducing stress response. In a wide range of organisms, physiological polyamines were not only induced by diverse stresses, such as reactive oxygen species (ROS), heat, ultraviolet (UV) and psychiatric stress but were able to confer beneficial effects for survival. Recent biochemical and genetic evidences show that polyamines can function as an ROS scavenger, acid tolerance factor and chemical chaperone, and positive regulators for expression of stress response genes which may explain their protective functions against diverse stresses. Taken together, these data suggest that physiological polyamines can function as primordial stress molecules in bacteria, plants and mammals, and may play an essential role in regulation of pathogen-host interactions.
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Affiliation(s)
- H J Rhee
- Department of Life Science and Interdisciplinary Program of Integrated Biotechnology, Sogang University, Seoul 121-742, Korea.
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