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Zyśk, Beata, Lucyna Ostrowska, Joanna Smarkusz-Zarzecka, Katarzyna Witczak-Sawczuk, Agnieszka Gornowicz et Anna Bielawska. « Pro-Inflammatory Adipokine and Cytokine Profiles in the Saliva of Obese Patients with Non-Alcoholic Fatty Liver Disease (NAFLD)—A Pilot Study ». International Journal of Molecular Sciences 24, no 3 (2 février 2023) : 2891. http://dx.doi.org/10.3390/ijms24032891.
Texte intégralRésumé :
Undiagnosed and untreated non-alcoholic fatty liver disease (NAFLD) can lead to the development of many complications, such as cirrhosis, hepatocellular carcinoma, or cardiovascular diseases. Obese people are at increased risk of developing NAFLD. Due to the current lack of routine diagnostics, it is extremely important to look for new diagnostic methods and markers for this disease. The aim of this study was to assess the concentration of selected pro-inflammatory adipokines and cytokines in the unstimulated saliva of obese people with fatty liver disease in various stages (with or without slight fibrosis) and to analyze them for possible use as early markers of NAFLD diagnosis. The study involved 96 people who were divided into 5 groups based on the criterion of body mass index (BMI) and the degree of fatty liver (liver elastography). There were statistically significant differences between the groups in the concentrations of MMP-9 (matrix metalloproteinase 9), resistin, and IL-1β (interleukin 1β) in saliva. Statistically significant, positive correlations between hepatic steatosis and the concentration of MMP-2 (matrix metalloproteinase 2), resistin, and IL-1β in saliva were also found. Statistically significant positive correlations were also found between the concentration of resistin in saliva and the concentration of ALT (alanine aminotransferase) and GGTP (gamma-glutamyl transpeptidase) in serum. MMP-2, IL-1β, and resistin may be potential markers of NAFLD development, assessed in saliva. However, further research is needed because this is the first study to evaluate the concentrations of the selected pro-inflammatory parameters in the saliva of patients with NAFLD.
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Voiculescu, Mihai, Radu M. Nanau et Manuela G. Neuman. « Non-invasive Biomarkers in Non-Alcoholic Steatohepatitisinduced Hepatocellular Carcinoma ». Journal of Gastrointestinal and Liver Diseases 23, no 4 (1 décembre 2014) : 425–29. http://dx.doi.org/10.15403/jgld.2014.1121.234.bna.
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Non-alcoholic fatty liver disease (NAFLD) is by far the most common form of chronic liver disease worldwide, affecting adults as well as children. Under the term of NAFLD there is a wide spectrum of diseases ranging from simple steatosis to the non-alcoholic steatohepatitis (NASH), which can progress to cirrhosis and hepatocellular carcinoma (HCC). Several mechanisms have been described to influence the progression of the disease from the benign NAFL to the aggressive NASH. The imbalance between pro- and anti-oxidant mechanisms and between pro- and anti-inflammatory cytokines is thought to play a pivotal role in the pathogenesis of NAFLD and disease progression toward NASH and fibrosis. The present review intends to look at some of the mechanistic biomarkers to be employed in establishing an early diagnosis in HCC derived from NASH.Abbreviations: ANGPT: angiopoietin-2; AFP: α-fetoprotein; ALT: alanine aminotransferase; AST: aspartate aminotransferase; CI: confidence interval; COL: collagen; DCP: des-carboxyprothrombin; γGT: gamma glutamyl transpeptidase; HBV: hepatitis B virus; HCC: hepatocellular carcinoma; HCV: hepatitis C virus; HR: hazard ratio; ITG: integrin; LAM: laminin collagen genes; MMP: matrix metalloproteinase; MS: metabolic syndrome; NAFLD: non-alcoholic fatty liver disease; NASH: non-alcoholic steatohepatitis; PDGFRA: platelet derived growth factor receptor-α
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Livzan, M. A., V. A. Akhmedov, T. S. Krolevets, O. V. Gaus et N. A. Cherkaschenko. « The informative value of non-invasive liver fibrosis markers in patients with nonalcoholic fatty liver disease ». Terapevticheskii arkhiv 88, no 12 (15 décembre 2016) : 62–68. http://dx.doi.org/10.17116/terarkh2016881262-68.
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Aim. To estimate the diagnostic and informative value of clinical and laboratory parameters in the development and progression of liver fibrosis in patients with nonalcoholic fatty liver disease (NAFLD) to enhance efficiency of their treatment. Subjects and methods. An open-label case-control study included 77 patients with NAFLD. Clinical and laboratory examinations were done. To search for additional noninvasive fibrosis markers, the investigators studied the serum concentrations of insulin, leptin, adiponectin, matrix metalloproteinase-9 (MMP-9) and its inhibitors, such as tissue inhibitor of matrix metalloproteinases 1 (TIMP-1) and TIMP-2. All the patients underwent elastometry to assess the degree of liver fibrosis with the Metavir scale with the use of a Fibroscan machine. Results. The serum levels of low-density lipoproteins, glucose, MMP-9, and leptin proved to be most informative in assessing the progression of the initial stages (1-2) of fibrosis, as were the increased liver size detected by physical examination, systolic blood pressure, carbohydrate metabolic disorders, alanine/aspartate aminotransferase levels, waist-to-hip ratio, TIMP-1, and TIMP-2 in evaluating the progression of Stage II fibrosis 2 to Stage 3. Conclusion. The clinical and laboratory parameters can serve as reliable noninvasive markers that reflect the progression of fibrotic changes in liver tissue.
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Lodge, Mareca, Denitra Breuer, Peter Thompson, Grace Scheidemantle, Xiaojing Liu et Arion Kennedy. « Fructose Metabolism and Regulation of Extracellular Matrix Protein Gene Expression in Activated Macrophages ». Current Developments in Nutrition 4, Supplement_2 (29 mai 2020) : 1527. http://dx.doi.org/10.1093/cdn/nzaa068_012.
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Abstract Objectives Recently fructose has been linked to the development of Nonalcoholic Fatty Liver Disease (NAFLD), but the mechanisms behind the progression remain to be elucidated. Kupffer cells have been identified as regulators of hepatic inflammation and extracellular matrix (ECM) proteins. Activated macrophages are known to express tissue inhibitor of metalloproteinase (TIMP1), which inhibits matrix metalloproteinase 9 (MMP9) activity of reconstructing ECM which leads to fibrosis. In humans and mouse models, TIMP1 expression is positively correlated with the progression of NAFLD. Based on these findings, we hypothesize that fructose regulates TIMP1 gene expression in activated proinflammatory macrophages. Methods Using an in vitro model of J774 macrophages and primary Kupffer cells, cells were treated to induce an M1 phenotype in the presence of glucose or fructose. Cells were harvested for RNA and RT-PCR was conducted to measure ECM gene expression. Isolated Kupffer cells were collected from C57BL/6J mice fed a high fat diet (HFD) supplemented with 30% fructose or 30% glucose and analyzed for ECM expression. To examine fructose uptake and intra- and extracellular metabolites, mass spectrophotometry and nuclear magnetic resonance was conducted. Results Timp1 gene expression was significantly increased in J77.4 cells treated with fructose compared to glucose. Surprisingly, fructose treatment decreased Mmp9 gene expression. Likewise, fructose treatment increased TIMP1 protein expression in isolated Kupffer cells. In vivo, isolated hepatic macrophages from mice fed HF and high fructose diet had elevated Timp1 gene expression compared to mice fed high glucose diet. Extracellular levels of lactate decreased by 1.5-fold in fructose treated J77.4 cells compared to glucose. Metabolites involved in the TCA cycle and mitochondrial function were decreased when treated with fructose compared to glucose in non-activated macrophages. However, fructose treatment increased intracellular methanol and acetate levels in M1 macrophages compared to glucose. Conclusions Our data suggest that fructose upregulates Timp1 expression and possibly decreases mitochondrial function while increasing acetate and methanol production, identifying new mechanisms by which fructose drives the progression of NAFLD. Funding Sources Kenan Institute North Carolina University.
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Yang, Weijia, Minchun Yang, Hui Yao, Yelin Ma, Xuanxuan Ren, Long Teng et Tao Wang. « Protective role of arnebin-1 in rats with nonalcoholic fatty liver disease ». Journal of International Medical Research 47, no 3 (25 janvier 2019) : 1250–63. http://dx.doi.org/10.1177/0300060518813058.
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Objective To examine the effects of arnebin-1 on nonalcoholic fatty liver disease (NAFLD) induced by a high-fat diet (HFD). Methods Male Sprague–Dawley rats were fed an HFD for 10 weeks and then treated with arnebin-1 at a dose of 5, 10 or 20 mg/kg/day by gavage for a further 12 weeks of a 22-week HFD. Peripheral blood and liver tissues were collected for biochemical and histopathological examination. The mechanisms of arnebin-1 on liver fibrosis and insulin resistance (IR) were determined by Western blotting and real-time quantitative polymerase chain reaction. Results Arnebin-1 treatment attenuated the increase of total cholesterol, triglycerides, low-density lipoprotein cholesterol, aspartate aminotransferase and alanine aminotransferase in serum and lipid accumulation in the livers of HFD-fed rats. Furthermore, arnebin-1 abrogated HFD-induced liver fibrosis and the increase of fibrotic biomarkers. The HFD-induced decrease of hepatic proliferator-activated receptor γ and pro-matrix-metalloproteinase (MMP)-9 levels and the increase of tissue inhibitor of metalloproteinase-1 (TIMP-1) levels were reversed after arnebin-1. Arnebin-1 attenuated IR through activating the insulin receptor substrate-1/Akt/mTOR signalling pathway. Conclusion This study demonstrated that arnebin-1 ameliorates NAFLD, in part, by attenuating hepatic fibrosis and IR, suggesting that arnebin-1 may be a therapeutic agent for NAFLD treatment.
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Wang, Yeli, Jian-Min Yuan, An Pan et Woon-Puay Koh. « Tissue inhibitor matrix metalloproteinase 1 and risk of type 2 diabetes in a Chinese population ». BMJ Open Diabetes Research & ; Care 8, no 1 (avril 2020) : e001051. http://dx.doi.org/10.1136/bmjdrc-2019-001051.
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IntroductionThe non-invasive enhanced liver fibrosis (ELF) score—comprising tissue inhibitor of matrix metalloproteinases-1 (TIMP1), hyaluronic acid (HA) and amino-terminal propeptide of type III procollagen (PIIINP)—has been shown to accurately predict fibrosis stages among patients with non-alcoholic fatty liver disease (NAFLD). However, no study has examined whether the ELF score or its components would also be predictive of type 2 diabetes, which commonly coexists and shares the same pathogenic abnormalities with NAFLD. Therefore, we prospectively investigated their associations with type 2 diabetes risks for the first time.Research design and methodsThe ELF score was measured among 254 type 2 diabetes cases and 254 age-matched and sex-matched controls nested within the prospective Singapore Chinese Health Study. Cases had hemoglobin A1c (HbA1c) levels <6.5% at blood collection (1999–2004) and reported to have diabetes during follow-up II (2006–2010). Controls had HbA1c levels <6.0% at blood-taking and remained free of diabetes at follow-up II. Multivariable conditional logistic regression models were used to assess the ELF-diabetes association.ResultsHigher TIMP1 levels were associated with increased type 2 diabetes risk, and the OR comparing the highest versus lowest quartiles was 2.56 (95% CI 1.23 to 5.34; p trend=0.035). However, ELF score, PIIINP and HA were not significantly associated with type 2 diabetes risks.ConclusionsHigher TIMP1 levels, but not ELF score, PIIIMP and HA, were associated with increased type 2 diabetes risk in Chinese adults. Our results suggested that elevated TIMP1 levels may contribute to the type 2 diabetes development through pathways other than liver fibrosis.
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Goyale, Atul, Anjly Jain, Colette Smith, Margarita Papatheodoridi, Marta Guerrero Misas, Davide Roccarina, Laura Iogna Prat, Dimitri P. Mikhailidis, Devaki Nair et Emmanuel Tsochatzis. « Assessment of non-alcoholic fatty liver disease (NAFLD) severity with novel serum-based markers : A pilot study ». PLOS ONE 16, no 11 (23 novembre 2021) : e0260313. http://dx.doi.org/10.1371/journal.pone.0260313.
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Background/Aims Non-alcoholic fatty liver disease (NAFLD) represents a significant public health issue. Identifying patients with simple steatosis from those with non-alcoholic steatohepatitis (NASH) is crucial since NASH is correlated with increased morbidity and mortality. Serum-based markers, including adipokines and cytokines, are important in the pathogenesis and progression of NAFLD. Here we assessed the usefulness of such markers in patients with NAFLD. Methods This prospective, cross-sectional study included 105 adult patients with varying severity of NAFLD. Twelve serum-based markers were measured by 3 biochip platforms and 2 enzyme-linked immunosorbent assay (ELISA) methods. We also developed a NAFLD individual fibrosis index (NIFI) using the serum-based markers mostly correlated with fibrosis severity. Results Sixty-one out of 105 patients were male (58.1%) with mean age was 53.5 years. Higher Interleukin-6 (IL-6) increased (p = 0.0321) and lower Matrix Metalloproteinase-9 (MMP-9) serum levels (p = 0.0031) were associated with higher fibrosis as measured by Fibroscan® in multivariable regression analysis. Using receiver-operating characteristic (ROC) curve analysis for the NIFI, area under the curve for predicting Fibroscan values ≥ 7.2 kPa was 0.77 (95%CI: 0.67, 0.88, p<0.001), with sensitivity of 89.3%, specificity of 57.9% and a positive likelihood ratio of 2.8. Conclusions Increasing fibrosis severity in NAFLD is associated with differential expression of IL-6 and MMP-9. NIFI could be valuable for the prediction of advanced NAFLD fibrosis and potentially help avoid unnecessary interventions such as liver biopsy in low-risk patients.
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Kura, Branislav, Maria Szantova, Tyler W. LeBaron, Viliam Mojto, Miroslav Barancik, Barbara Szeiffova Bacova, Barbora Kalocayova et al. « Biological Effects of Hydrogen Water on Subjects with NAFLD : A Randomized, Placebo-Controlled Trial ». Antioxidants 11, no 10 (28 septembre 2022) : 1935. http://dx.doi.org/10.3390/antiox11101935.
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Non-alcoholic fatty liver disease (NAFLD) is a liver pathology affecting around 25% of the population worldwide. Excess oxidative stress, inflammation and aberrant cellular signaling can lead to this hepatic dysfunction and eventual carcinoma. Molecular hydrogen has been recognized for its selective antioxidant properties and ability to attenuate inflammation and regulate cellular function. We administered hydrogen-rich water (HRW) to 30 subjects with NAFLD in a randomized, double-blinded, placebo-controlled manner for eight weeks. Phenotypically, we observed beneficial trends (p > 0.05) in decreased weight (≈1 kg) and body mass index in the HRW group. HRW was well-tolerated, with no significant changes in liver enzymes and a trend of improved lipid profile and reduced lactate dehydrogenase levels. HRW tended to non-significantly decrease levels of nuclear factor kappa B, heat shock protein 70 and matrix metalloproteinase-9. Interestingly, there was a mild, albeit non-significant, tendency of increased levels of 8-hydroxy-2’-deoxyguanosine and malondialdehyde in the HRW group. This mild increase may be indicative of the hormetic effects of molecular hydrogen that occurred prior to the significant clinical improvements reported in previous longer-term studies. The favorable trends in this study in conjunction with previous animal and clinical findings suggest that HRW may serve as an important adjuvant therapy for promoting and maintaining optimal health and wellness. Longer term studies focused on prevention, maintenance, or treatment of NAFLD and early stages of NASH are warranted.
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Siciliano, V., L. G. Di Pasqua, C. Berardo, V. Rizzo, P. Richelmi, S. Perlini, A. Ferrigno, G. Palladini et M. Vairetti. « Lobe-specific oxidative stress and matrix metalloproteinase activation in two animal models of non-alcoholic fatty liver disease (NAFLD) ». Digestive and Liver Disease 49, no 1 (février 2017) : e31. http://dx.doi.org/10.1016/j.dld.2017.01.066.
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Federico, Alessandro, Marcello Dallio, Mario Masarone, Antonietta Gerarda Gravina, Rosa Di Sarno, Concetta Tuccillo, Valentina Cossiga et al. « Evaluation of the Effect Derived from Silybin with Vitamin D and Vitamin E Administration on Clinical, Metabolic, Endothelial Dysfunction, Oxidative Stress Parameters, and Serological Worsening Markers in Nonalcoholic Fatty Liver Disease Patients ». Oxidative Medicine and Cellular Longevity 2019 (15 octobre 2019) : 1–12. http://dx.doi.org/10.1155/2019/8742075.
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Nowadays, the nonalcoholic fatty liver disease represents the main chronic liver disease in the Western countries, and the correct medical therapy remains a big question for the scientific community. The aim of our study was to evaluate the effect derived from the administration for six months of silybin with vitamin D and vitamin E (RealSIL 100D®) on metabolic markers, oxidative stress, endothelial dysfunction, and worsening of disease markers in nonalcoholic fatty liver disease patients. We enrolled 90 consecutive patients with histological diagnosis of nonalcoholic fatty liver disease and 60 patients with diagnosis of reflux disease (not in therapy) as healthy controls. The nonalcoholic fatty liver disease patients were randomized into two groups: treated (60 patients) and not treated (30 patients). We performed a nutritional assessment and evaluated clinical parameters, routine home tests, the homeostatic model assessment of insulin resistance, NAFLD fibrosis score and fibrosis-4, transient elastography and controlled attenuation parameter, thiobarbituric acid reactive substances, tumor necrosis factor α, transforming growth factor β, interleukin-18 and interleukin-22, matrix metalloproteinase 2, epidermal growth factor receptor, insulin growth factor-II, cluster of differentiation-44, high mobility group box-1, and Endocan. Compared to the healthy controls, the nonalcoholic fatty liver disease patients had statistically significant differences for almost all parameters evaluated at baseline (p<0.05). Six months after the baseline, the proportion of nonalcoholic fatty liver disease patients treated that underwent a statistically significant improvement in metabolic markers, oxidative stress, endothelial dysfunction, and worsening of disease was greater than not treated nonalcoholic fatty liver disease patients (p<0.05). Even more relevant results were obtained for the same parameters by analyzing patients with a concomitant diagnosis of metabolic syndrome (p<0.001). The benefit that derives from the use of RealSIL 100D could derive from the action on more systems able to advance the pathology above all in that subset of patients suffering from concomitant metabolic syndrome.
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Egan, Karl, Eimear Dunne, Audrey Dillon, Barry Kevane, Zita Galvin, Dermot Kenny, Stephen Stewart et Fionnuala Ní Áinle. « Increased Soluble GPVI Levels in Cirrhosis : Evidence for Collagen Induced Platelet Activation In Vivo ». Blood 126, no 23 (3 décembre 2015) : 1114. http://dx.doi.org/10.1182/blood.v126.23.1114.1114.
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Abstract Background Cirrhosis is a consequence of prolonged inflammation arising from chronic liver disease of different aetiologies. It is characterised by tissue fibrosis, the deposition of collagen-rich extracellular matrix tissue within the liver. Glycoprotein VI (GPVI) is platelet-specific collagen receptor that is shed from the platelet surface in a metalloproteinase-dependent manner in response to GPVI ligation. The shed extracellular region of GPVI can be detected in plasma and used as a measure of GPVI-dependent platelet activation in vivo. Several lines of evidence suggest that GPVI-dependent platelet activation occurs in cirrhosis. Platelets have been shown to accumulate at sites of collagen-rich fibrotic tissue. Circulating levels of collagen are increased in cirrhosis. Collagen-induced platelet aggregation responses are reduced in vitro with cirrhosis. Based on these results, we hypothesised that soluble GPVI (sGPVI) levels are increased in patients with cirrhosis. As such, the aim of this study was to quantify sGPVI levels in patients with cirrhosis and compare to healthy controls. Methods Compensated cirrhotic patients were recruited at the Mater Misericordiae University Hospital, Dublin, Ireland. The diagnosis of cirrhosis was based on clinical examination, blood tests, and radiological examination (nodular surface, larger right lobe, coarse echotexture). Exclusion criteria were decompensated cirrhosis, recent thrombotic events, and antiplatelet and/or anticoagulant therapies. Healthy controls were recruited at the Royal College of Surgeons in Ireland and Beaumont Hospital, Dublin, Ireland. Blood samples were collected into vacutainers containing 3.2 % sodium citrate as anticoagulant. sGPVI levels in platelet poor plasma were measured using an in house custom ELISA. Results 57 patients with mixed aetiology cirrhosis and 55 healthy controls were recruited. In the patient group, 42% of patients had alcoholic liver disease (ALD), 30% had hepatitis C (HCV), 7% had non alcoholic fatty liver disease (NAFLD), 5% had Hepatitis B (HBV), 5% had autoimmune hepatitis (AIH), 5% had cryptogenic liver disease, 4% had hereditary haemochromatosis (HH), and 2% had primary biliary cholangitis (PBC). sGPVI levels were significantly increased in patients with cirrhosis (5.8 ± 0.6 ng/ml, n = 57) compared to healthy controls (3.2 ± 0.4 ng/ml, n = 55, p < 0.0001). There was no significant difference between sGPVI levels in AIH (4 ± 1 ng/ml, n = 3), ALD (5.6 ± 1 ng/ml, n = 24), cryptogenic (12 ± 5 ng/ml, n = 3), HBV (3.1 ± 1 ng/ml, n = 3), HCV (5 ± 0.6 ng/ml), or NAFLD (5.3 ± 1.1 ng/ml, n = 4). sGPVI levels did not correlate with platelet count (r = 0.12, p = 0.3) or parameters of liver cell function (albumin, bilirubin, prothrombin time, and liver stiffness measurements). Conclusion sGPVI levels are significantly increased in patients with mixed aetiology cirrhosis. This indicates collagen induced platelet activation is occurring in vivo and suggests the presence of an underlying coagulopathy in patients with cirrhosis. Disclosures Ní Áinle: Actelion Pharma: Research Funding; Leo Pharma: Research Funding; Bristol Myers Squibb: Membership on an entity's Board of Directors or advisory committees; Bayer: Membership on an entity's Board of Directors or advisory committees; Daiichi Sankyo: Membership on an entity's Board of Directors or advisory committees; Boehringer Ingelheim: Membership on an entity's Board of Directors or advisory committees.
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Trojanek, Joanna B., Jacek Michałkiewicz, Renata Grzywa-Czuba, Wojciech Jańczyk, Lidia Gackowska, Izabela Kubiszewska, Anna Helmin-Basa, Aldona Wierzbicka-Rucińska, Mieczysław Szalecki et Piotr Socha. « Expression of Matrix Metalloproteinases and Their Tissue Inhibitors in Peripheral Blood Leukocytes and Plasma of Children with Nonalcoholic Fatty Liver Disease ». Mediators of Inflammation 2020 (10 septembre 2020) : 1–14. http://dx.doi.org/10.1155/2020/8327945.
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Gene expression profiles of matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) were evaluated in peripheral blood leukocytes of children with nonalcoholic fatty liver disease (NAFLD). Gene expression patterns were correlated with their plasma protein counterparts, systemic parameters of liver injury, and selected markers of inflammation. The MMP-2, MMP-9, MMP-12, MMP-14, TIMP-1, TIMP-2, TGF-β, and IL-6 transcripts levels were tested by the real-time PCR. Plasma concentrations of MMP-9, TIMP-1, MMP-9/TIMP-1 ratio, MMP-2/TIMP-2 ratio, sCD14, leptin, resistin, IL-1 beta, and IL-6 and serum markers of liver injury were estimated by ELISA. The MMP-9, TIMP-2 expression levels, plasma amounts of MMP-9, TIMP-1, and the MMP-9/TIMP-1 ratio were increased in children with NAFLD. Concentrations of AST, ALT, GGT, and leptin were elevated in serum patients with NAFLD, while concentration of other inflammatory or liver injury markers was unchanged. The MMP-2 and MMP-9 levels correlated with serum liver injury parameters (ALT and GGT concentrations, respectively); there were no other correlations between MMP/TIMP gene expression profiles, their plasma counterparts, and serum inflammatory markers. Association of MMP-2 and MMP-9 expression with serum liver injury parameters (ALT, GGT) may suggest leukocyte engagement in the early stages of NAFLD development which possibly precedes subsequent systemic inflammatory responses.
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Palladini, Giuseppina, Laura Di Pasqua, Clarissa Berardo, Veronica Siciliano, Plinio Richelmi, Barbara Mannucci, Anna Croce et al. « Fatty Acid Desaturase Involvement in Non-Alcoholic Fatty Liver Disease Rat Models : Oxidative Stress Versus Metalloproteinases ». Nutrients 11, no 4 (8 avril 2019) : 799. http://dx.doi.org/10.3390/nu11040799.
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We investigated changes in fatty acid desaturases, D5D, D6D, D9-16D and D9-18D, and their relationship with oxidative stress, matrix metalloproteinases (MMPs) and serum TNF-alpha in two rat models of non-alcoholic fatty liver disease NAFLD. Eight-week-old male Wistar rats fed for 3 weeks with methionine-choline–deficient (MCD) diet and eleven-week-old Obese male Zucker rats were used. Serum levels of hepatic enzymes and TNF-alpha were quantified. Hepatic oxidative stress (ROS, TBARS and GSH content) and MMP-2 and MMP-9 (protein expression and activity) were evaluated. Liver fatty acid profiling, performed by GC-MS, was used for the quantification of desaturase activities. Higher D5D and D9-16D were found in Obese Zucker rats as well as an increase in D9-18D in MCD rats. D6D was found only in MCD rats. A negative correlation between D5D and D9-16D versus TBARS, ROS and TNF-alpha and a positive correlation with GSH were shown in fatty livers besides a positive correlation between D9-18D versus TBARS, ROS and TNF-alpha and a negative correlation with GSH. A positive correlation between D5D or D9-16D or D9-18D versus protein expression and the activity of MMP-2 were found. NAFLD animal models showed comparable serum enzymes. These results reinforce and extend findings on the identification of therapeutic targets able to counteract NAFLD disorder.
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Feng, Yu, Yan Chen, Binrui Yang, Qingping Lan, Tao Wang, Guozhen Cui, Zhitao Ren et al. « Hepatoprotective Effect of Jianpi Huoxue Formula on Nonalcoholic Fatty Liver Disease Induced by Methionine-Choline-Deficient Diet in Rat ». BioMed Research International 2019 (1 juillet 2019) : 1–12. http://dx.doi.org/10.1155/2019/7465272.
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In parallel with the prevalence metabolic syndrome, nonalcoholic fatty liver disease (NAFLD) has become the most common chronic liver disease in most countries. It features a constellation of simple steatosis, nonalcoholic steatohepatitis (NASH), fibrosis, cirrhosis, and even hepatocellular carcinoma. There are no approved drugs for effective management of NAFLD and NASH. Jianpi Huoxue formula (JPHX) mainly consists of Atractylodes macrocephal(Baizhu), Salvia miltiorrhiza (Danshen), Rasux Paeonia Alba (Baishao), Rhizoma Alismatis (Zexie), and Fructus Schisandrae Chinensis (Wuweizi), which may have beneficial effects on NAFLD. The aim of the study was to identify the effect of JPHX on NAFLD.A NAFLD model was induced by methionine-choline-deficient food (MCD) in Wistar rats and orally administered with simultaneous JPHX, once a day for 8 weeks. Hepatocellular injury, lipid profile, inflammation, fibrosis, and apoptosis were evaluated. The results showed that JPHX significantly decreased the abnormal serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels compared with the MCD model (P<0.05). Furthermore, JPHX protected MCD diet-fed rats from accumulation of hepatic triglycerides (TG) and total cholesterol (TC). Histological examination demonstrated that JPHX noticeably normalized the NAFLD activity score (NAS). Moreover, JPHX ameliorated liver inflammation by decreasing TNF-αlevels and reduced collagen and matrix metalloproteinases in MCD diet-fed rats. In addition, JPHX prevented rats from MCD-induced cellular apoptosis, as suggested by TUNEL staining, and suppressed the activation of caspase 3 and 7 proteins. JPHX also inhibited the phosphorylation of JNK. In conclusion, JPHX exhibited a hepatoprotective effect against NAFLD in an MCD experimental model.
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Palladini, Giuseppina, Laura Giuseppina Di Pasqua, Marta Cagna, Anna Cleta Croce, Stefano Perlini, Barbara Mannucci, Antonella Profumo, Andrea Ferrigno et Mariapia Vairetti. « MCD Diet Rat Model Induces Alterations in Zinc and Iron during NAFLD Progression from Steatosis to Steatohepatitis ». International Journal of Molecular Sciences 23, no 12 (19 juin 2022) : 6817. http://dx.doi.org/10.3390/ijms23126817.
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We evaluate the effects of the methionine-choline-deficient (MCD) diet on serum and hepatic zinc (Zn) and iron (Fe) and their relationships with matrix metalloproteinases (MMPs) and their modulators (TIMPs and RECK) as well as hepatic fatty acids using male Wistar rats fed 2-, 4- and 8-week MCD diets. Serum and hepatic Zn decrease after an 8-week MCD diet. Serum Fe increases after an 8-week MCD diet and the same occurs for hepatic Fe. An increase in hepatic MMP activity, associated with a decrease in RECK and TIMPs, is found in the MCD 8-week group. Liver Fe shows a positive correlation versus MMPs and RECK, and an inverse correlation versus TIMPs. A positive correlation is found comparing liver Zn with stearic, vaccenic and arachidonic acids, and an inverse correlation is found with linolenic and docosatetraenoic acids. An opposite trend is found between liver Fe versus these fatty acids. During NAFLD progression from steatosis to steatohepatitis, MCD rats exhibit an increase in Zn and a decrease in Fe levels both in serum and tissue associated with alterations in hepatic MMPs and their inhibitors, and fatty acids. The correlations detected between Zn and Fe versus extracellular matrix modulators and fatty acids support their potential role as therapeutic targets.
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Irvine, Katharine M., Satomi Okano, Preya J. Patel, Leigh U. Horsfall, Suzanne Williams, Anthony Russell et Elizabeth E. Powell. « Serum matrix metalloproteinase 7 (MMP7) is a biomarker of fibrosis in patients with non-alcoholic fatty liver disease ». Scientific Reports 11, no 1 (3 février 2021). http://dx.doi.org/10.1038/s41598-021-82315-z.
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AbstractNon-alcoholic fatty liver disease (NAFLD) affects 25% of the adult population globally. Since liver fibrosis is the most important predictor of liver-related complications in patients with NAFLD, identification of patients with advanced fibrosis among at-risk individuals is an important issue in clinical practice. Transient elastography is the best evaluated non-invasive method used in referral centres to assess liver fibrosis, however serum-based tests, such as the Enhanced Liver Fibrosis (ELF) score, have a practical advantage as first-line tests due to their wider availability and lower cost. We previously identified matrix metalloproteinase 7 (MMP7) as a serum biomarker of histological advanced fibrosis in a mixed-etiology patient cohort. In this study we aimed to determine the association between MMP7 and fibrosis, assessed by transient elastography, in patients with NAFLD. Serum MMP7 levels were measured in a cohort of 228 patients with NAFLD. Associations between MMP7, liver stiffness measurement (LSM), ELF score and clinical parameters were determined using logistic regression modelling. Serum MMP7 was associated with clinically significant fibrosis (LSM ≥ 8.2), independent of age, gender, BMI and diabetes. The addition of MMP7 significantly improved the diagnostic performance of the ELF test, particularly in patients over the age of 60. Combinations of serum biomarkers have the potential to improve the sensitivity and specificity of detection of advanced fibrosis in at-risk patients with NAFLD. We have demonstrated that serum MMP7 is independently associated with clinically significant fibrosis and improves the diagnostic performance of currently available tests in older patients.
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Wagner, Jonas, Yogesh Kumar, Anne Lautenbach, Philipp von Kroge, Stefan Wolter, Oliver Mann, Jakob Izbicki, Nicola Gagliani et Anna Duprée. « Fatty acid-binding protein-4 (FABP4) and matrix metalloproteinase-9 (MMP9) as predictive values for nonalcoholic steatohepatitis (NASH) ». Lipids in Health and Disease 22, no 1 (6 janvier 2023). http://dx.doi.org/10.1186/s12944-022-01764-1.
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Abstract Background Nonalcoholic fatty liver disease (NAFLD), especially nonalcoholic steatohepatitis (NASH) increases the risk for liver cirrhosis. Noninvasive tests for NAFLD/NASH exist, but they are unreliable and thus liver biopsy remains the standard for diagnosis and new noninvasive diagnostic approaches are of great interest. The aim of this study was to test whether the serum levels of fatty acid-binding protein-4 (FABP4) and matrix metalloproteinase-9 (MMP9) could be used as a diagnostic tool for NASH. Methods Patients who underwent bariatric surgery and simultaneous liver biopsy were identified. Biopsies were assigned a NAFLD activity score (NAS). MMP9- and FABP4- Enzyme-linked Immunosorbent Assays (ELISAs) on serum samples were performed. The serum levels of FABP4/MMP9 were compared and different models to predict NASH were developed. Results A total of 84 patients were included, 28 patients (33.3%) were diagnosed with NASH. Higher concentrations of MMP9 in NASH patients (p < 0.01) were detected. FABP4 concentrations were not significantly increased. A moderate correlation between the NAS and MMP9 concentrations (r = 0.32, P < 0.01) was observed. The neural network model fit best with the dataset, with an area under the curve (AUC) of 83% and an accuracy of 88%. Conclusion Serum MMP9 levels are increased in patients with NASH and should routinely be measured in patients with obesity, but further investigations are needed to improve noninvasive NASH diagnosis.
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Coilly, Audrey, Christophe Desterke, Catherine Guettier, Didier Samuel et Franck Chiappini. « FABP4 and MMP9 levels identified as predictive factors for poor prognosis in patients with nonalcoholic fatty liver using data mining approaches and gene expression analysis ». Scientific Reports 9, no 1 (décembre 2019). http://dx.doi.org/10.1038/s41598-019-56235-y.
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AbstractNonalcoholic fatty liver (NAFLD) may progress to nonalcoholic steatohepatitis (NASH) and ultimately to cirrhosis and hepatocellular carcinoma (HCC). Prognostic markers for these conditions are poorly defined. The aim of this study was to identify predictive gene markers for the transition from NAFL to NASH and then to poorer conditions. Gene expression omnibus datasets associated with a prediction analysis algorithm were used to create a matrix composed of control subject (n = 52), healthy obese (n = 51), obese with NAFL (n = 42) and NASH patients (n = 37) and 19,085 genes in order to identify specific genes predictive of the transition from steatosis to NASH and from NASH to cirrhosis and HCC and thus patients at high risk of complications. A validation cohort was used to validate these results. We identified two genes, fatty acid binding protein-4 (FABP4) and matrix metalloproteinase-9 (MMP9), which respectively allowed distinguishing patients at risk of progression from NAFL to NASH and from NASH to cirrhosis and HCC. Thus, NAFL patients expressing high hepatic levels of FABP4 and NASH patients expressing high hepatic levels of MMP9 are likely to experience disease progression. Therefore, using FABP4 and MMP9 as blood markers could help to predict poor outcomes and/or progression of NAFL during clinical trial follow-up.
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Zhang, Linda S., Zhongyi Chen, Youming Zhang, Lei Ding, Patricia G. Yancey, Arion Kennedy, MacRae F. Linton, Alyssa Hasty et Sean S. Davies. « Abstract 48 : Administration of Gut Bacteria Expressing N-acyl Phosphatidylethanolamine Reduces Steatohepatitis in LDLR-/- Mice Fed a Western Diet ». Arteriosclerosis, Thrombosis, and Vascular Biology 36, suppl_1 (mai 2016). http://dx.doi.org/10.1161/atvb.36.suppl_1.48.
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Background: The rise in obesity in the United States has led to a concomitant rise in prevalence of non-alcoholic fatty liver disease (NAFLD). The four stages of NAFLD include accumulation of triglyceride (hepatosteatosis), development of chronic inflammation (non-alcoholic steatohepatitis, NASH), fibrosis, and finally cirrhosis. Unlike wildtype C57BL6 mice, low density lipoprotein receptor (LDLR) -/- mouse fed a diet enriched in fat and cholesterol (Western Diet) progress to NASH and fibrotic stages of NAFLD. We showed that incorporating engineered bacteria expressing N-acyl phosphatidylethanolamine (NAPE) into the gut microbiota can inhibit development of obesity. NAPE is a precursor of N-acylethanolamines, which are bioactive lipids with anti-inflammatory functions. Here, we test the hypothesis that administering these NAPE-expressing bacteria inhibits development of NASH and fibrosis. Methods: NAPE-expressing E. coli Nissle 1917 (pNAPE-EcN, n=10), control Nissle 1917 (pEcN, n=10), or vehicle (veh, n=10) were given via drinking water to LDLR -/- mice fed a Western diet for 12 weeks. LDLR -/- mice fed a low fat diet (LFD) (n=10) were included for comparison. Results: pNAPE-EcN reduced adiposity by 26% compared with pEcN and veh (P<0.05). pNAPE-EcN also dramatically reduced hepatic triglyceride levels by 45% (p<0.05) and lipid droplet size, as well as the hepatic expressions of tissue necrosis factor α (TNFα, p<0.05), chemokine receptor 2 (CCR2, p<0.01), and tissue inhibitor of matrix metalloproteinase (TIMP1, p<0.05), consistent with reduced NASH and fibrosis. Sirius Red staining of liver sections further demonstrated reduced fibrosis. Because fatty liver is associated with atherosclerosis, we checked to see if pNAPE-EcN was able to reduce the development of atherosclerotic lesions. While serum cholesterol was reduced by 23% with pNAPE-EcN treatment (p<0.05), atherosclerotic lesion size in proximal or en face aortas only tended to be reduced (20%, 18.6%) but was not statistically significant. Conclusions: Our results demonstrate that incorporating therapeutically modified bacteria into the gut microbiota has potential to inhibit the development of NAFLD.
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Beisner, Julia, Louisa Filipe Rosa, Valentina Kaden-Volynets, Iris Stolzer, Claudia Günther et Stephan C. Bischoff. « Prebiotic Inulin and Sodium Butyrate Attenuate Obesity-Induced Intestinal Barrier Dysfunction by Induction of Antimicrobial Peptides ». Frontiers in Immunology 12 (11 juin 2021). http://dx.doi.org/10.3389/fimmu.2021.678360.
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Defects in the mucosal barrier have been associated with metabolic diseases such as obesity and non-alcoholic fatty liver disease (NAFLD). Mice fed a Western-style diet (WSD) develop obesity and are characterized by a diet-induced intestinal barrier dysfunction, bacterial endotoxin translocation and subsequent liver steatosis. To examine whether inulin or sodium butyrate could improve gut barrier dysfunction, C57BL/6 mice were fed a control diet or a WSD ± fructose supplemented with either 10% inulin or 5% sodium butyrate for 12 weeks respectively. Inulin and sodium butyrate attenuated hepatosteatitis in the WSD-induced obesity mouse model by reducing weight gain, liver weight, plasma and hepatic triglyceride level. Furthermore, supplementation with inulin or sodium butyrate induced expression of Paneth cell α-defensins and matrix metalloproteinase-7 (MMP7), which was impaired by the WSD and particularly the fructose-added WSD. Effects on antimicrobial peptide function in the ileum were accompanied by induction of β-defensin-1 and tight junction genes in the colon resulting in improved intestinal permeability and endotoxemia. Organoid culture of small intestinal crypts revealed that the short chain fatty acids (SCFA) butyrate, propionate and acetate, fermentation products of inulin, induce Paneth cell α-defensin expression in vitro, and that histone deacetylation and STAT3 might play a role in butyrate-mediated induction of α-defensins. In summary, inulin and sodium butyrate attenuate diet-induced barrier dysfunction and induce expression of Paneth cell antimicrobials. The administration of prebiotic fiber or sodium butyrate could be an interesting therapeutic approach to improve diet-induced obesity.
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Barchuk, Magalí, Laura Schreier, Gabriela Berg et Verónica Miksztowicz. « Metalloproteinases in non-alcoholic fatty liver disease and their behavior in liver fibrosis ». Hormone Molecular Biology and Clinical Investigation, 1 septembre 2018. http://dx.doi.org/10.1515/hmbci-2018-0037.
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Abstract Non-alcoholic fatty liver disease (NAFLD) is a clinical entity of high prevalence in the world characterized by fatty infiltration of liver tissue in the absence of alcohol consumption. The natural history of the disease develops in successive phases reflected in different histological stages, with 10–20% of patients developing liver cirrhosis and fibrosis. Fibrosis is a basic connective tissue lesion defined by the increase of the fibrillary extracellular matrix (ECM) components in a tissue or organ. Matrix metalloproteinases (MMPs) constitute a family of endopeptidases, which are involved in ECM and basement membranes components degradation. Fibrogenic process is characterized by altered ECM composition, associated with modifications in MMPs behavior. The active cross-talk between adipose tissue and liver can be altered in pathologies associated to insulin resistance (IR), such as NAFLD. The role of adipokines on MMPs behavior in the liver could be partly responsible of liver damage during IR. The aim of this revision is to describe the behavior of MMPs in NAFLD and its role in the associated fibrosis.
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Huang, Lili, Weitian Tian, Xuemei Chen, Huan Xu, Wanbing Dai, Yizhe Zhang, Xiaodan Wu, Weifeng Yu, Jie Tian et Diansan Su. « Peripheral Neutrophils-Derived Matrix Metallopeptidase-9 Induces Postoperative Cognitive Dysfunction in Aged Mice ». Frontiers in Aging Neuroscience 14 (22 février 2022). http://dx.doi.org/10.3389/fnagi.2022.683295.
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BackgroundAging is one of the most important risk factors of postoperative cognitive dysfunction (POCD); however, the mechanisms are still not completely understood. In this study, we explore the roles of matrix metalloproteinase-9 (MMP-9) in aged mice with POCD.MethodsAppendectomy was performed in 18-month-old C57BL/6 and MMP-9–/– mice under anesthesia to establish the POCD model. Learning and memory were assessed using the Morris water maze (MWM) or Barnes maze. Protein expression of MMP-9 was measured by Western blotting or enzyme-linked immunosorbent assay (ELISA). To explore the role of neutrophils-derived MMP-9 in POCD, we treated mice with anti-Gr-1 monoclonal antibody to deplete peripheral neutrophils. And the percentage of neutrophils and other leukocytes were detected by flow cytometry. We further used sodium fluorescein (NaFlu) to evaluate the blood–brain barrier (BBB) permeability.ResultsThe spatial learning and memory ability was injured, and expression of MMP-9 increased in both plasma and the hippocampus after anesthesia/surgery. However, cognitive dysfunction was alleviated in both MMP-9–/– and peripheral neutrophils-depleted mice. The permeability of BBB was increased after anesthesia/surgery while recused by anti-Gr-1 antibody administration.ConclusionThese findings suggest that peripheral neutrophils-derived MMP-9 could lead to POCD of aged mice through increasing the BBB permeability.