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microbiota and liver

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https://www.readbyqxmd.com/read/29150974/reciprocal-interactions-between-bile-acids-and-gut-microbiota-in-human-liver-diseases
#1
REVIEW
Tadashi Ikegami, Akira Honda
The gut microbiota (GM) play a central role in their hosts' metabolism of bile acids (BAs) by regulating deconjugation, dehydroxylation, dehydrogenation, and epimerization reactions to generate unconjugated free BAs and secondary BAs. These BAs generated by the GM are potent signaling molecules that interact with BA receptors, such as the farnesoid X receptor (FXR) and Takeda G-protein-coupled receptor 5 (TGR5). Each BA has a differential affinity to these receptors; therefore, alterations in BA composition by GM could modify the intensity of receptor signaling...
November 18, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/29150490/gut-roundtable-meeting-paper-selected-recent-advances-in-hepatocellular-carcinoma
#2
REVIEW
Alexander Gerbes, Fabien Zoulim, Herbert Tilg, Jean-François Dufour, Jordi Bruix, Valérie Paradis, Riad Salem, Markus Peck-Radosavljevic, Peter R Galle, Tim F Greten, Jean-Charles Nault, Matias A Avila
Hepatocellular carcinoma (HCC) ranks number three among the most frequent causes of death from solid tumors worldwide. With obesity and fatty liver diseases as risk factors on the rise, HCC represents an ever increasing challenge. While there is still no curative treatment for most patients numerous novel drugs have been proposed, but most ultimately failed in phase III trials. This manuscript targets therapeutic advances and most burning issues. Expert key point summaries and urgent research agenda are provided regarding risk factors, including microbiota, need for prognostic and predictive biomarkers and the equivocal role of liver biopsy...
November 17, 2017: Gut
https://www.readbyqxmd.com/read/29148175/treatment-efficacy-of-a-probiotic-preparation-for-non-alcoholic-steatohepatitis-a-pilot-trial
#3
Elina Manzhalii, Oleksandr Virchenko, Tetyana Falalyeyeva, Tetyana Beregova, Wolfgang Stremmel
AIM: To evaluate the therapeutic effect of a probiotic cocktail containing lactobacilli, bifidobacteria, and Streptococcus thermophilus on non-alcoholic steatohepatitis (NASH). METHODS: In this open-label trial, 75 patients with NASH fed a low-fat/low-calorie diet were randomly divided into the control group (n = 37) and the experimental group (n = 38) also receiving the probiotic cocktail once daily for 12 weeks. RESULTS: All patients were diagnosed with fatty liver by ultrasound examination and had elevated levels of gamma-glutamyl transferase (GGT) and alanine aminotransferase (ALT), and slightly increased body mass index (BMI) and cholesterol levels...
November 17, 2017: Journal of Digestive Diseases
https://www.readbyqxmd.com/read/29139555/tauroursodeoxycholic-acid-inhibits-intestinal-inflammation-and-barrier-disruption-in-nafld-mice
#4
Weijun Wang, Jinfang Zhao, Wenfang Gui, Dan Sun, Haijiang Dai, Li Xiao, Huikuan Chu, Fan Du, Qingjing Zhu, Bernd Schnabl, Kai Huang, Ling Yang, Xiaohua Hou
BACKGROUND AND PURPOSE: The gut-liver axis is associated with the progression of non-alcoholic fatty liver disease (NAFLD). Targeting the gut-liver axis and bile acid-based pharmaceuticals are potential therapies for NAFLD. The effect of tauroursodeoxycholic acid (TUDCA), a candidate medicine for NAFLD, on intestinal barrier function, intestinal inflammation, gut lipid transport and microbiota composition in a murine NAFLD model were analysed. EXPERIMENTAL APPROACHES: An NAFLD mouse model was established by feeding mice with a high-fat diet (HFD) for 16 weeks...
November 15, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29131494/antimicrobial-emulsifier-glycerol-monolaurate-induces-metabolic-syndrome-gut-microbiota-dysbiosis-and-systemic-low-grade-inflammation-in-low-fat-diet-fed-mice
#5
Zengliang Jiang, Minjie Zhao, Hui Zhang, Yang Li, Mengyun Liu, Fengqin Feng
SCOPE: Glycerol monolaurate (GML) was widely consumed worldwide in food industry, and considered as safe, yet for chronic diseases, supporting scientific data remain sparse. This study was to investigate whether dietary GML induces metabolic syndrome, gut microbiota dysbiosis and systemic low-grade inflammation. METHODS AND RESULTS: GML-induced occurrence of metabolic syndrome, gut microbiota alterations and systemic low-grade inflammation were investigated. Our results demonstrated that GML induced metabolic syndrome by significantly increasing the body weight, weight gain, food intake, body fat, fat droplet size and percentage of epididymal fat, serum triglycerides (TG), LDL and atherogenic index, and decreasing the body muscle ratio, liver weight and HDL, compared to the CON group...
November 13, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29127476/co-supplementation-of-isomalto-oligosaccharides-potentiates-metabolic-health-benefits-of-polyphenol-rich-cranberry-extract-in-high-fat-diet-fed-mice-via-enhanced-gut-butyrate-production
#6
Dhirendra Pratap Singh, Shashank Singh, Vandana Bijalwan, Vijay Kumar, Pragyanshu Khare, Ritesh Kumar Baboota, Paramdeep Singh, Ravneet Kaur Boparai, Jagdeep Singh, Kanthi Kiran Kondepudi, Kanwaljit Chopra, Mahendra Bishnoi
PURPOSE: Cranberries are a rich source of polyphenolic antioxidants. Purified sugars or artificial sweeteners are being added to cranberry-based food products to mask tartness. Refined sugar and artificial sweeteners intake modulate gut microbiota and result in metabolic complications. We evaluated effects of isomalto-oligosaccharides (IMOs; sweet tasting non-digestible oligosaccharides) with cranberry extract (CRX) on high fat diet (HFD)-induced metabolic alterations in mice. METHODS: Male Swiss albino mice were fed normal chow or HFD (58% fat kcal), and were administered either CRX (200 mg/kg) alone or in combination with IMOs (1 g/kg)...
November 10, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/29122905/healthy-donor-faecal-transplant-for-corticosteroid-non-responsive-severe-alcoholic-hepatitis
#7
Cyriac Abby Philips, Nikhil Phadke, Karthik Ganesan, Philip Augustine
Patients with severe alcoholic hepatitis (SAH) have high mortality in the presence of steroid unresponsiveness in the absence of clear treatment recommendations. Liver transplantation is the curative option in such cases but is controversial in the wake of severe infections, post-transplant recidivism and long waiting on deceased donor listing. Animal and human studies have shed light on the beneficial effects of gut microbiota modulation in alcoholic liver disease. We present the first report of faecal microbiota transplantation (FMT) in a steroid non-responder in whom, clinical, biochemical and liver disease severity scores improved post-FMT and demonstrate distinct bacterial population changes pre-FMT and post-FMT...
November 8, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29120742/the-human-microbiome-and-obesity-moving-beyond-associations
#8
REVIEW
Padma Maruvada, Vanessa Leone, Lee M Kaplan, Eugene B Chang
Mounting evidence indicates that the gut microbiome responds to diet, antibiotics, and other external stimuli with speed and high precision and in ways that impact a variety of metabolic conditions including obesity and non-alcoholic fatty liver disease. Despite a decade of research establishing a strong association between the gut microbiota and obesity in humans, a causal relationship and the underlying mechanism remain outstanding. Several technological and methodological limitations in obesity and microbiome research have made it difficult to establish causality in this complex relationship...
November 8, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/29119385/intestinal-permeabiliy-in-relapsing-remitting-multiple-sclerosis
#9
REVIEW
M C Buscarinu, S Romano, R Mechelli, R Pizzolato Umeton, M Ferraldeschi, A Fornasiero, R Reniè, B Cerasoli, E Morena, C Romano, N D Loizzo, R Umeton, M Salvetti, G Ristori
Changes of intestinal permeability (IP) have been extensively investigated in inflammatory bowel diseases (IBD) and celiac disease (CD), underpinned by a known unbalance between microbiota, IP and immune responses in the gut. Recently the influence of IP on brain function has greatly been appreciated. Previous works showed an increased IP that preceded experimental autoimmune encephalomyelitis development and worsened during disease with disruption of TJ. Moreover, studying co-morbidity between Crohn's disease and MS, a report described increased IP in a minority of cases with MS...
November 8, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/29113135/nonalcoholic-fatty-liver-disease-is-exacerbated-in-high-fat-diet-fed-gnotobiotic-mice-by-colonization-with-the-gut-microbiota-from-patients-with-nonalcoholic-steatohepatitis
#10
Chien-Chao Chiu, Yung-Hao Ching, Yen-Peng Li, Ju-Yun Liu, Yen-Te Huang, Yi-Wen Huang, Sien-Sing Yang, Wen-Ching Huang, Hsiao-Li Chuang
Nonalcoholic fatty liver disease (NAFLD) is a serious liver disorder associated with the accumulation of fat and inflammation. The objective of this study was to determine the gut microbiota composition that might influence the progression of NAFLD. Germ-free mice were inoculated with feces from patients with nonalcoholic steatohepatitis (NASH) or from healthy persons (HL) and then fed a standard diet (STD) or high-fat diet (HFD). We found that the epididymal fat weight, hepatic steatosis, multifocal necrosis, and inflammatory cell infiltration significantly increased in the NASH-HFD group...
November 6, 2017: Nutrients
https://www.readbyqxmd.com/read/29113028/restoration-of-a-healthy-intestinal-microbiota-normalizes-portal-hypertension-in-a-rat-model-of-nonalcoholic-steatohepatitis
#11
Teresa García-Lezana, Imma Raurell, Miren Bravo, Manuel Torres-Arauz, María Teresa Salcedo, Alba Santiago, Andreu Schoenenberger, Chaysavanh Manichanh, Joan Genescà, María Martell, Salvador Augustin
Portal hypertension (PH) drives most of the clinical complications in chronic liver diseases. However, its progression in nonalcoholic steatohepatitis (NASH) and its association with the intestinal microbiota (IM) has been scarcely studied. Our aim was to investigate the role of IM in the mechanisms leading to PH in early NASH. The experimental design was divided in two stages: Stage 1: Sprague-Dawley rats were fed for 8 weeks with high-fat diet and high-glucose/fructose syrup (HFGFD) or control diet/water (CD)...
November 7, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29107524/a-polyphenol-rich-cranberry-extract-reverses-insulin-resistance-and-hepatic-steatosis-independently-of-body-weight-loss
#12
Fernando F Anhê, Renato T Nachbar, Thibault V Varin, Vanessa Vilela, Stéphanie Dudonné, Geneviève Pilon, Maryse Fournier, Marc-André Lecours, Yves Desjardins, Denis Roy, Emile Levy, André Marette
OBJECTIVE: Previous studies have reported that polyphenol-rich extracts from various sources can prevent obesity and associated gastro-hepatic and metabolic disorders in diet-induced obese (DIO) mice. However, whether such extracts can reverse obesity-linked metabolic alterations remains unknown. In the present study, we aimed to investigate the potential of a polyphenol-rich extract from cranberry (CE) to reverse obesity and associated metabolic disorders in DIO-mice. METHODS: Mice were pre-fed either a Chow or a High Fat-High Sucrose (HFHS) diet for 13 weeks to induce obesity and then treated either with CE (200 mg/kg, Chow + CE, HFHS + CE) or vehicle (Chow, HFHS) for 8 additional weeks...
October 18, 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29102744/modulating-bile-acid-pathways-and-tgr5-receptors-for-treating-liver-and-gi-diseases
#13
REVIEW
Harmeet Malhi, Michael Camilleri
Bile acids are central signals in enterohepatic communication and also integrate microbiota-derived signals into this signaling axis. Discovery of the tissue distribution and signaling pathways activated by the natural receptors for bile acids, farnesoid X receptor and G protein-coupled bile acid receptor 1 (GPBAR1) also known as TGR5, and bile acid transporters has led to the development of therapeutic agents that target these molecules. Obeticholic acid, a selective FXR agonist, and NGM282, a non-mitogenic FGF-19 analog, are two of the agents in this pipeline...
November 2, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/29101772/liver-disease-symptoms-in-non-alcoholic-fatty-liver-disease-and-small-intestinal-bacterial-overgrowth
#14
Rahmatollah Rafiei, Mahboobeh Bemanian, Fereshteh Rafiei, Mahmood Bahrami, Lotfollah Fooladi, Giti Ebrahimi, Ahmadreza Hemmat, Zahra Torabi
INTRODUCTION: It seems that there is a relationship between small intestinal bacterial overgrowth (SIBO) and non-alcoholic fatty liver disease (NAFLD). The main objective of this study was to evaluate the prevalence of SIBO among NAFLD patients. METHODS: In this descriptive-analytical cross-sectional study, 98 eligible NAFLD patients were evaluated for SIBO using hydrogen breath test (HBT). They were divided into SIBO-positive and SIBO-negative groups. Demographic, clinical, and laboratory data were obtained...
October 26, 2017: Romanian Journal of Internal Medicine, Revue Roumaine de Médecine Interne
https://www.readbyqxmd.com/read/29101656/impact-of-enteric-health-and-mucosal-permeability-on-skeletal-health-and-lameness-in-poultry
#15
L R Bielke, B M Hargis, J D Latorre
Intestinal barrier leakage and/or altered gut microbial composition has been shown to markedly impact both osteoblast and osteoclast activities, systemically through circulation of gut immune cells and cytokines and locally by causing inflammation of extraintestinal organs such as the liver and bone marrow. Mild cases of heightened intestinal inflammation can cause bone loss in male mice in the absence of any overt nutritional deficiencies or weight loss, which has also been shown in chickens that have been infected with Salmonella...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29100781/estrogens-and-female-liver-health
#16
Karen L Chen, Zeynep Madak-Erdogan
Due to declining estrogen levels during menopause, NAFLD prevalence is higher in postmenopausal women compared to in premenopausal women or in men. Postmenopausal women are more susceptible to weight gain, fat redistribution and dyslipidemia, all major hallmarks of metabolic syndrome associated with increased NAFLD risk. Gut microbiota plays important roles in development of gastrointestinal tract, metabolism and immunity. Host-microbe interactions allows regulation of a wide range of pathways that affect healthy and diseased physiology...
November 1, 2017: Steroids
https://www.readbyqxmd.com/read/29097871/fecal-microbiota-transplantation-prevents-hepatic-encephalopathy-in-rats-with-carbon-tetrachloride-induced-acute-hepatic-dysfunction
#17
Wei-Wei Wang, Yu Zhang, Xiao-Bing Huang, Nan You, Lu Zheng, Jing Li
AIM: To investigate whether fecal microbiota transplantation (FMT) prevents hepatic encephalopathy (HE) in rats with carbon tetrachloride (CCl4)-induced acute hepatic dysfunction. METHODS: A rat model of HE was established with CCl4. Rat behaviors and spatial learning capability were observed, and hepatic necrosis, intestinal mucosal barrier, serum ammonia levels and intestinal permeability were determined in HE rats receiving FMT treatment. Furthermore, the expression of tight junction proteins (Claudin-1, Claudin-6 and Occludin), Toll-like receptor (TLR) 4/TLR9, interleukin (IL)-1β, IL-6 and tumor necrosis factor (TNF)-α was examined...
October 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29097439/mucosa-associated-invariant-t-cells-link-intestinal-immunity-with-antibacterial-immune-defects-in-alcoholic-liver-disease
#18
Antonio Riva, Vishal Patel, Ayako Kurioka, Hannah C Jeffery, Gavin Wright, Sarah Tarff, Debbie Shawcross, Jennifer M Ryan, Alexander Evans, Sarah Azarian, Jasmohan S Bajaj, Andrew Fagan, Vinood Patel, Kosha Mehta, Carlos Lopez, Marieta Simonova, Krum Katzarov, Tanya Hadzhiolova, Slava Pavlova, Julia A Wendon, Ye Htun Oo, Paul Klenerman, Roger Williams, Shilpa Chokshi
BACKGROUND/AIMS: Intestinal permeability with systemic distribution of bacterial products are central in the immunopathogenesis of alcoholic liver disease (ALD), yet links with intestinal immunity remain elusive. Mucosa-associated invariant T cells (MAIT) are found in liver, blood and intestinal mucosa and are a key component of antibacterial host defences. Their role in ALD is unknown. METHODS/DESIGN: We analysed frequency, phenotype, transcriptional regulation and function of blood MAIT cells in severe alcoholic hepatitis (SAH), alcohol-related cirrhosis (ARC) and healthy controls (HC)...
November 2, 2017: Gut
https://www.readbyqxmd.com/read/29093626/faecal-microbiota-transplantation-in-patients-with-clostridium-difficile-and-significant-comorbidities-as-well-as-in-patients-with-new-indications-a-case-series
#19
Perttu Lahtinen, Eero Mattila, Veli-Jukka Anttila, Jyrki Tillonen, Matti Teittinen, Pasi Nevalainen, Seppo Salminen, Reetta Satokari, Perttu Arkkila
Fecal microbiota transplantation (FMT) is effective in recurrent Clostridium difficile infection (rCDI). Knowledge of the safety and efficacy of FMT treatment in immune deficient patients is scarce. FMT has been suggested as a potential method for an increasing number of new indications besides rCDI. Among our FMT-treated rCDI patients, we reviewed those with major comorbidities: two human immunodeficiency virus patients, six haemodialysis patients, two kidney transplant patients, two liver transplant patients and a patient with chronic lymphatic leukaemia...
October 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29091761/commensal-lactobacillus-controls-immune-tolerance-during-acute-liver-injury-in-mice
#20
Nobuhiro Nakamoto, Takeru Amiya, Ryo Aoki, Nobuhito Taniki, Yuzo Koda, Kentaro Miyamoto, Toshiaki Teratani, Takahiro Suzuki, Sayako Chiba, Po-Sung Chu, Atsushi Hayashi, Akihiro Yamaguchi, Shunsuke Shiba, Rei Miyake, Tadashi Katayama, Wataru Suda, Yohei Mikami, Nobuhiko Kamada, Hirotoshi Ebinuma, Hidetsugu Saito, Masahira Hattori, Takanori Kanai
Gut-derived microbial antigens trigger the innate immune system during acute liver injury. During recovery, regulatory immunity plays a role in suppressing inflammation; however, the precise mechanism underlying this process remains obscure. Here, we find that recruitment of immune-regulatory classical dendritic cells (cDCs) is crucial for liver tolerance in concanavalin A-induced acute liver injury. Acute liver injury resulted in enrichment of commensal Lactobacillus in the gut. Notably, Lactobacillus activated IL-22 production by gut innate lymphoid cells and raised systemic IL-22 levels...
October 31, 2017: Cell Reports
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