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Nonalcoholic fat liver disease

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https://www.readbyqxmd.com/read/28334911/mertk-rs4374383-variant-predicts-incident-nonalcoholic-fatty-liver-disease-and-diabetes-role-of-mononuclear-cell-activation-and-adipokine-response-to-dietary-fat
#1
Giovanni Musso, Maurizio Cassader, Franco De Michieli, Elena Paschetta, Silvia Pinach, Francesca Saba, Daria Bongiovanni, Luciana Framarin, Mara Berrutti, Nicola Leone, Stefania Corvisieri, Renato Parente, Federica Molinaro, Antonio Sircana, Bo Simona, Roberto Gambino
The loss-of-function rs4374383 G>A variant in Myeloid-epithelial-reproductive Tyrosine Kinase (MERTK) gene has been linked to hepatic fibrosis in chronic liver diseases. MERTK is expressed by immune and non-immune cells involved in inflammation, metabolism and vascular homeostasis. We assessed the impact of MERTK rs4374383 G>A variant on nonalcoholic fatty liver disease (NAFLD) incidence and severity and on glucose and lipid metabolism.We followed-up 305 healthy nonobese nondiabetic, metabolic syndrome-free insulin sensitive participants in a population-based study, characterized for MERTK G>A polymorphism, adipokine profile and inflammatory markers...
March 8, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28333140/metabolic-and-molecular-insights-into-an-essential-role-of-nicotinamide-phosphoribosyltransferase
#2
Li Q Zhang, Leon Van Haandel, Min Xiong, Peixin Huang, Daniel P Heruth, Charlie Bi, Roger Gaedigk, Xun Jiang, Ding-You Li, Gerald Wyckoff, Dmitry N Grigoryev, Li Gao, Linheng Li, Min Wu, J Steven Leeder, Shui Qing Ye
Nicotinamide phosphoribosyltransferase (NAMPT) is a pleiotropic protein implicated in the pathogenesis of acute respiratory distress syndrome, aging, cancer, coronary heart diseases, diabetes, nonalcoholic fatty liver disease, obesity, rheumatoid arthritis, and sepsis. However, the underlying molecular mechanisms of NAMPT in these physiological and pathological processes are not fully understood. Here, we provide experimental evidence that a Nampt gene homozygous knockout (Nampt(-/-)) resulted in lethality at an early stage of mouse embryonic development and death within 5-10 days in adult mice accompanied by a 25...
March 23, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28332619/retinol-binding-protein-4-levels-and-non-alcoholic-fatty-liver-disease-a-community-based-cross-sectional-study
#3
Xuechen Chen, Tianran Shen, Qing Li, Xu Chen, Yanping Li, Dan Li, Gengdong Chen, Wenhua Ling, Yu-Ming Chen
Previous reports on the association between retinol binding protein 4 (RBP4) and nonalcoholic fatty liver disease (NAFLD) were controversial. This study aimed to investigate the association between the serum RBP4 levels and occurrence of NAFLD in Chinese population. In total, 2938 participants aged 40-75 years were involved in this community-based cross-sectional study. General information, lifestyle factors, serum levels of RBP4 and the presence of NAFLD were determined. Patients with NAFLD had significantly higher concentrations of RBP4 (37...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28332301/a-randomized-trial-comparing-gliclazide-liraglutide-and-metformin-effects-on-diabetes-with-nonalcoholic-fatty-liver-disease
#4
Wenhuan Feng, Caixia Gao, Yan Bi, Min Wu, Ping Li, Shanmei Shen, Wei Chen, Tingting Yin, Dalong Zhu
OBJECTIVE: To compare the effects of gliclazide, liraglutide, and metformin in type 2 diabetes mellitus (T2DM) patients with non-alcoholic fatty liver disease (NAFLD). METHODS: Eighty-seven subjects were randomized to receive liraglutide, metformin, or gliclazide for 24 weeks. Primary outcomes included hemoglobin A1c (HbA1c) levels, intrahepatic fat (IHF) content, and liver function. RESULTS: HbA1c levels and IHF content reduced after treatment in the three groups...
March 23, 2017: Journal of Diabetes
https://www.readbyqxmd.com/read/28325574/decoy-receptor-3-analogous-supplement-protects-steatotic-rat-liver-from-ischemia-reperfusion-injury
#5
Tzu-Hao Li, Chih-Wei Liu, Pei-Chang Lee, Chia-Chang Huang, Kuei-Chuan Lee, Yun-Cheng Hsieh, Ying-Ying Yang, Shie-Liang Hsieh, Han-Chieh Lin, Chang-Youh Tsai
BACKGROUND: For steatotic livers, pharmacological approaches to minimize the hepatic neutrophil and macrophage infiltration, and cytokine and chemokine release in ischemia-reperfusion (IR) injury are still limited. Tumor necrosis factor (TNF)-α superfamily-stimulated pathogenic cascades and M1 macrophage/Kupffer cells (KC) polarization from Th1 cytokines are important in the pathogenesis of IR liver injury with hepatic steatosis (HS). Conversely, anti-inflammatory M2 macrophages produce Th2 cytokine (interleukin-4), which reciprocally enhances M2 polarization...
March 16, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/28322576/the-effects-of-exercise-on-abdominal-fat-and-liver-enzymes-in-pediatric-obesity-a-systematic-review-and-meta-analysis
#6
Katherine González-Ruiz, Robinson Ramírez-Vélez, Jorge Enrique Correa-Bautista, Mark D Peterson, Antonio García-Hermoso
BACKGROUND: Despite the prevalence of obesity and the multiple position stands promoting exercise for the treatment of obesity and hepatic function, a meta-analytic approach has not previously been used to examine the effects in the pediatric population. The aim of the study was to determine the effectiveness of exercise interventions on abdominal fat, liver enzymes, and intrahepatic fat in overweight and obese youth. MATERIALS AND METHODS: A computerized search was made using three databases...
March 21, 2017: Childhood Obesity
https://www.readbyqxmd.com/read/28300161/foxo-transcription-factors-protect-against-the-diet-induced-fatty-liver-disease
#7
Xiaoyan Pan, Yang Zhang, Hyeong-Geug Kim, Suthat Liangpunsakul, X Charlie Dong
Forkhead O transcription factors (FOXOs) have been implicated in glucose and lipid homeostasis; however, the role of FOXOs in the development of nonalcoholic fatty liver disease (NAFLD) is not well understood. In this study, we designed experiments to examine the effects of two different diets-very high fat diet (HFD) and moderately high fat plus cholesterol diet (HFC)-on wildtype (WT) and liver-specific Foxo1/3/4 triple knockout mice (LTKO). Both diets induced severe hepatic steatosis in the LTKO mice as compared to WT controls...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28299304/effects-of-phlebotomy-on-liver-enzymes-and-histology-of-patients-with-nonalcoholic-fatty-liver-disease
#8
Mahsa Khodadoostan, Maryam Zamanidoost, Ahmad Shavakhi, Hosein Sanei, Masood Shahbazi, Mehdi Ahmadian
BACKGROUND: Nonalcoholic fatty liver disease (NAFLD), defined as excessive liver fat deposition and one of end-stage liver disease causes. Increased ferritin levels are associated with insulin resistance and a higher hepatic iron and fat content. Hyperferritinemia has been associated with severity of liver damage in NAFLD. The study aimed to evaluate the effects of phlebotomy on liver enzymes and histology in such patients. MATERIALS AND METHODS: Thirty-two eligible patients who had NAFLD and after 6 months of lifestyle modification still had NAFLD, and whose ferritin serum was above 250 mg/dl, were enrolled in this clinical trial study...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28299034/the-effect-of-a-lifestyle-modification-education-on-adiposity-measures-in-overweight-and-obese-nonalcoholic-fatty-liver-disease-patients
#9
Arman Arab, Gholamreza Askari, Parastoo Golshiri, Awat Feizi, Ali Hekmatnia, Bijan Iraj, Mojgan Nourian
BACKGROUND: Obesity is increasingly associated with nonalcoholic fatty liver disease (NAFLD) and weight loss through a combination of dietary modifications and increased physical activity is a primary goal of therapy in this disease. Therefore, this study was conducted to evaluate the effects of a lifestyle modification education on adiposity measures, physical activity, and total calorie intake in overweight and obese NAFLD patients. METHODS: During 8 weeks, 82 obese patients were randomly assigned into either an intervention group (n = 41) receiving a lifestyle modification education or to a control group (n = 41) receiving usual care...
2017: International Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28291240/testosterone-levels-in-pre-menopausal-women-are-associated-with-nonalcoholic-fatty-liver-disease-in-midlife
#10
Monika Sarkar, Melissa Wellons, Marcelle I Cedars, Lisa VanWagner, Erica P Gunderson, Veeral Ajmera, Laura Torchen, David Siscovick, J Jeffrey Carr, James G Terry, Mary Rinella, Cora E Lewis, Norah Terrault
OBJECTIVES: Young women with hyperandrogenism have high risk of metabolic co-morbidities, including increased risk of nonalcoholic fatty liver disease (NAFLD). Whether testosterone (the predominant androgen) is associated with NAFLD independent of metabolic co-factors is unclear. Additionally, whether testosterone confers increased risk of NAFLD in women without hyperandrogenism is unknown. METHODS: Among women in the prospective population-based multicenter Coronary Artery Risk Development in Young Adults (CARDIA) study, we assessed whether free testosterone levels measured at Year 2 (1987-1988) were associated with prevalent NAFLD at Year 25 (2010-2011) (n=1052)...
March 14, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28290069/significance-of-genetic-polymorphisms-in-patients-with-nonalcoholic-fatty-liver-disease
#11
REVIEW
Hisamitsu Miyaaki, Kazuhiko Nakao
Because of recent advances in genetic research such as genome-wide association studies, the underlying genetic mechanisms of nonalcoholic fatty liver disease (NAFLD) pathophysiology have been elucidated. Here, we present a review of the current literature on the impact of genetic polymorphisms in patients with NAFLD. These genetic polymorphisms, which regulate lipid metabolism, glucose metabolism, and the renin-angiotensin system, are involved in NAFLD onset, steatosis, inflammation, fibrosis, and hepatocellular carcinoma (HCC)...
March 13, 2017: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/28285648/branched-chain-amino-acids-alleviate-hepatic-steatosis-and-liver-injury-in-choline-deficient-high-fat-diet-induced-nash-mice
#12
Takashi Honda, Masatoshi Ishigami, Fangqiong Luo, Ma Lingyun, Yoji Ishizu, Teiji Kuzuya, Kazuhiko Hayashi, Isao Nakano, Tetsuya Ishikawa, Guo-Gang Feng, Yoshiaki Katano, Tomoya Kohama, Yasuyuki Kitaura, Yoshiharu Shimomura, Hidemi Goto, Yoshiki Hirooka
BACKGROUND: For successful treatment for nonalcoholic steatohepatitis (NASH), it may be important to treat the individual causative factors. At present, however, there is no established treatment for this disease. Branched-chain amino acids (BCAAs) have been used to treat patients with decompensated cirrhosis. AIM: In order to elucidate the mechanisms responsible for the effects of BCAAs on hepatic steatosis and disease progression, we investigated the effects of BCAA supplementation in mice fed a choline-deficient high-fat diet (CDHF), which induces NASH...
April 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28284571/dynamic-mechanical-analysis-to-assess-viscoelasticity-of-liver-tissue-in-a-rat-model-of-nonalcoholic-fatty-liver-disease
#13
Xinyu Zhang, Xuehua Gao, Pengpeng Zhang, Yanrong Guo, Haoming Lin, Xianfen Diao, Yingxia Liu, Changfeng Dong, Yaxin Hu, Siping Chen, Xin Chen
Nonalcoholic fatty liver disease (NAFLD) is the most common liver disorder in both developed and developing countries. A noninvasive method of detecting early stage NAFLD and distinguishing non-alcoholic steatohepatitis (NASH) from simple steatosis (SS) would be useful. The over-accumulation of fat in hepatocytes alters the physical microstructure and chemical contents of the liver tissue. This study included dynamic mechanical analysis (DMA) testing on liver samples from a rat model of NAFLD to determine whether the tissue shows any significant changes in viscoelasticity due to the histological changes...
March 8, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28278289/toyocamycin-attenuates-free-fatty-acid-induced-hepatic-steatosis-and-apoptosis-in-cultured-hepatocytes-and-ameliorates-nonalcoholic-fatty-liver-disease-in-mice
#14
Ikuko Takahara, Yuko Akazawa, Maiko Tabuchi, Katsuya Matsuda, Hisamitsu Miyaaki, Youko Kido, Yasuko Kanda, Naota Taura, Ken Ohnita, Fuminao Takeshima, Yusuke Sakai, Susumu Eguchi, Masahiro Nakashima, Kazuhiko Nakao
BACKGROUND AND AIMS: A high serum level of saturated free fatty acids (FFAs) is associated with the development of nonalcoholic fatty liver disease (NAFLD). X-box binding protein-1 (XBP-1) is activated by FFA treatment upon splicing. XBP-1 is a transcription factor induced by the endoplasmic reticulum (ER) stress sensor endoribonuclease inositol-requiring enzyme 1 alpha (IRE1α). However, the role of XBP-1 in NAFLD remains relatively unexplored. Toyocamycin was recently reported to attenuate the activation of XBP-1, possibly by inducing a conformational change in IRE1α...
2017: PloS One
https://www.readbyqxmd.com/read/28276774/pharmacological-management-of-nonalcoholic-fatty-liver-disease-in-type-2-diabetes
#15
Simona Cernea, Avivit Cahn, Itamar Raz
The prevalence of nonalcoholic fatty liver disease (NAFLD) in patients with type 2 diabetes (T2D) is high and it is associated with poor prognosis. Hepatic steatosis results as a consequence of excessive hepatic lipid accumulation which correlates with insulin resistance and lipotoxicity, with subsequent oxidative stress, inflammation, apoptosis and fibrosis. Areas covered: This article presents the main pathophysiologic mechanisms and currently available drugs evaluated for their therapeutic effects on NAFLD/nonalcoholic steatohepatitis (NASH) and drugs under development that target relevant pathogenetic pathways...
March 6, 2017: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/28270609/ablation-of-cytochrome-p450-omega-hydroxylase-4a14-gene-attenuates-hepatic-steatosis-and-fibrosis
#16
Xiaoyan Zhang, Sha Li, Yunfeng Zhou, Wen Su, Xiongzhong Ruan, Bing Wang, Feng Zheng, Margaret Warner, Jan-Åke Gustafsson, Youfei Guan
Nonalcoholic fatty liver disease (NAFLD) is characterized by simple hepatic steatosis (SS), nonalcoholic steatohepatitis (NASH), hepatic fibrosis, and cirrhosis. Dysregulated fatty acid metabolism in the liver plays a critical role in the pathogenesis of NAFLD. Cytochrome P450 omega-hydroxylase 4A14 (CYP4A14) is a homolog of human CYP4A hydroxylase that catalyzes omega-hydroxylation of medium-chain fatty acids and arachidonic acid in mice. The goal of this study was to determine the role of CYP4A14 in the development and the progression of NAFLD...
March 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28267360/a-pilot-comparative-study-of-quantitative-ultrasound-conventional-ultrasound-and-mri-for-predicting-histology-determined-steatosis-grade-in-adult-nonalcoholic-fatty-liver-disease
#17
Jeremy S Paige, Gregory S Bernstein, Elhamy Heba, Eduardo A C Costa, Marilia Fereirra, Tanya Wolfson, Anthony C Gamst, Mark A Valasek, Grace Y Lin, Aiguo Han, John W Erdman, William D O'Brien, Michael P Andre, Rohit Loomba, Claude B Sirlin
OBJECTIVE: The purpose of this study is to explore the diagnostic performance of two investigational quantitative ultrasound (QUS) parameters, attenuation coefficient and backscatter coefficient, in comparison with conventional ultrasound (CUS) and MRI-estimated proton density fat fraction (PDFF) for predicting histology-confirmed steatosis grade in adults with nonalcoholic fatty liver disease (NAFLD). SUBJECTS AND METHODS: In this prospectively designed pilot study, 61 adults with histology-confirmed NAFLD were enrolled from September 2012 to February 2014...
March 7, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28257515/new-evidence-for-the-therapeutic-potential-of-curcumin-to-treat-nonalcoholic-fatty-liver-disease-in-humans
#18
María Eugenia Inzaugarat, Elena De Matteo, Placida Baz, Diego Lucero, Cecilia Claudia García, Esteban Gonzalez Ballerga, Jorge Daruich, Juan Antonio Sorda, Miriam Ruth Wald, Alejandra Claudia Cherñavsky
INTRODUCTION: The immune system acts on different metabolic tissues that are implicated in the pathogenesis of nonalcoholic fatty liver disease (NAFLD). Leptin and linoleic acid have the ability to potentially affect immune cells, whereas curcumin is a known natural polyphenol with antioxidant and anti-inflammatory properties. AIMS: This study was designed to evaluate the pro-inflammatory and pro-oxidant effects of leptin and linoleic acid on immune cells from patients with NAFLD and to corroborate the modulatory effects of curcumin and its preventive properties against the progression of NAFLD using a high-fat diet (HFD)-induced NAFLD/nonalcoholic steatohepatitis mouse model...
2017: PloS One
https://www.readbyqxmd.com/read/28255329/salidroside-modulates-insulin-signaling-in-a-rat-model-of-nonalcoholic-steatohepatitis
#19
Hongshan Li, Hao Ying, Airong Hu, Dezhou Li, Yaoren Hu
A growing body of evidence has shown the beneficial effects of salidroside in cardiovascular and metabolic diseases. This study aimed to evaluate the therapeutic effects of salidroside on nonalcoholic steatohepatitis (NASH) in rats and explore the underlying mechanisms related to insulin signaling. A rat model of NASH was developed by high-fat diet for 14 weeks. From week 9 onward, the treatment group received oral salidroside (4.33 mg/kg) daily for 6 weeks. Salidroside effectively attenuated steatosis and vacuolation of hepatic tissue, with a dramatic decrease in liver triglycerides and free fatty acid levels (P < 0...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28254666/kukoamine-a-attenuates-insulin-resistance-and-fatty-liver-through-downregulation-of-srebp-1c
#20
Guangyun Li, Fang Zhou, Ying Chen, Weiguo Zhang, Ning Wang
Nonalcoholic fatty liver disease (NAFLD) refers to a pathological condition of hepatic steatosis. Insulin resistance is believed to be the key mechanism mediating initial accumulation of fat in the liver, resulting in hepatic steatosis. Kukoamine A (KuA), a spermine alkaloid, is a major bioactive component extracted from the root barks of Lycium chinense (L. chinense) Miller. In the current study, we aimed to explore the possible effect of KuA on insulin resistance and fatty liver. We showed that KuA significantly inhibited the increase of fasting blood glucose level and insulin level, and the glucose levels in response to glucose and insulin load in HFD-fed mice, which was in a dose-dependent manner...
February 27, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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