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Bile acids

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https://www.readbyqxmd.com/read/29684468/bile-acid-regulation-a-novel-therapeutic-strategy-in-non-alcoholic-fatty-liver-disease
#1
REVIEW
Qinwei Yu, Zhenzhou Jiang, Luyong Zhang
Non-alcoholic fatty liver disease (NAFLD) is characterized by excessive fat deposition in the liver in the absence of significant alcohol consumption. Dysregulated bile acid (BA) metabolism is an important indicator in the pathology of NAFLD, which could progress into more severe forms of liver injury. Lipid metabolism, immune environment and intestinal bacteria are all affected by dysregulated BA metabolism directly, but the mechanisms remain unclear. Several drug candidates that target BA metabolism, either used alone or in combination with other agents, are currently under development for treatment of NAFLD...
April 20, 2018: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29683480/metabolism-of-hydrogen-gases-and-bile-acids-in-the-gut-microbiome
#2
REVIEW
Phillip B Hylemon, Spencer C Harris, Jason M Ridlon
The human gut microbiome refers to a highly diverse microbial ecosystem, which has a symbiotic relationship with the host. Molecular hydrogen (H2) and carbon dioxide (CO2) are generated by fermentative metabolism in anaerobic ecosystems. H2 generation and oxidation coupled to CO2 reduction to methane or acetate help maintain the structure of the gut microbiome. Bile acids are synthesized by hepatocytes from cholesterol in the liver and are important regulators of host metabolism. In this Review, we discuss how gut bacteria metabolize hydrogen gases and bile acids in the intestinal tract and the consequences on host physiology...
April 23, 2018: FEBS Letters
https://www.readbyqxmd.com/read/29679334/metabolic-surgery-and-diabesity-a-systematic-review
#3
REVIEW
Lionel El Khoury, Elie Chouillard, Elias Chahine, Elias Saikaly, Tarek Debs, Radwan Kassir
Bariatric surgery is used to induce weight loss (baros = weight). Evidence has shown that bariatric surgery improves the comorbid conditions associated with obesity such as hypertension, hyperlipidemia, and type 2 diabetes mellitus T2DM. Hence, shifting towards using metabolic surgery instead of bariatric surgery is currently more appropriate in certain subset of patients. Endocrine changes resulting from operative manipulation of the gastrointestinal tract after metabolic surgery translate into metabolic benefits with respect to the comorbid conditions...
April 20, 2018: Obesity Surgery
https://www.readbyqxmd.com/read/29678931/manipulation-of-the-gut-liver-axis-by-interruption-of-bile-acid-recirculation-an-option-for-the-treatment-of-sclerosing-cholangitis
#4
Daniel Jahn, Marco Marzioni, Andreas Geier
No abstract text is available yet for this article.
April 20, 2018: Gut
https://www.readbyqxmd.com/read/29678738/autochthonous-lactic-acid-bacteria-isolated-from-pig-faeces-in-thailand-show-probiotic-properties-and-antibacterial-activity-against-enteric-pathogenic-bacteria
#5
Wandee Sirichokchatchawan, Puwiya Pupa, Prasert Praechansri, Nutthee Am-In, Somboon Tanasupawat, Piengchan Sonthayanon, Nuvee Prapasarakul
Lactic acid bacteria (LAB) play an important role in pig health and performance that arises from their beneficial impacts on the balance of gastrointestinal microbes, ability to fight enteric pathogens, and capacity to support the immune system. The aim of this study was to evaluate the functional and safety aspects of five previously isolated autochthonous LAB strains, (Lactobacillus plantarum 22F, 25F and 31F, Pediococcus acidilactici 72N and Pediococcus pentosaceus 77F) from pig faeces as potential probiotics for a pig feed supplement...
April 17, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29678609/fat-nucleosome-role-of-lipids-on-chromatin
#6
REVIEW
Vinicius Fernandes, Kaian Teles, Camyla Ribeiro, Werner Treptow, Guilherme Santos
Structural changes in chromatin regulate gene expression and define phenotypic outcomes. Molecules that bind to the nucleosome, the complex of DNA and histone proteins, are key modulators of chromatin structure. Most recently, the formation of condensed chromatin regions based on phase-separation in the cell, a basic physical mechanism, was proposed. Increased understanding of the mechanisms of interaction between chromatin and lipids suggest that small lipid molecules, such as cholesterol and short-chain fatty acids, can regulate important nuclear functions...
April 17, 2018: Progress in Lipid Research
https://www.readbyqxmd.com/read/29677620/hippocampal-fxr-plays-a-role-in-the-pathogenesis-of-depression-a-preliminary-study-based-on-lentiviral-gene-modulation
#7
Wei-Guan Chen, Jia-Xuan Zheng, Xi Xu, Yu-Ming Hu, Yu-Min Ma
As a well-known bile acid receptor, the role of Farnesoid X receptor (FXR) in the digestive system and cardiovascular system has been widely explored. However, there are very few studies involving FXR in the central nervous system. In this study, we explored the role of FXR in the pathogenesis of depression, a serious and worldwide neuropsychiatric disease. It was found that chronic unpredictable mild stress (CUMS) fully enhanced the protein and mRNA expressions of FXR in hippocampus, but not medial prefrontal cortex (mPFC)...
April 10, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29676719/vibrio-gangliei-sp-nov-a-novel-member-of-vibrionaceae-isolated-from-sawdust-in-a-pigpen
#8
Yu-Chen Meng, Hong-Can Liu, Yu-Guang Zhou, Man Cai, Yingqian Kang
A Gram-stain-negative, rod-shaped, catalase- and oxidase-positive, facultatively anaerobic, and motile bacterium, designated strain SZDIS-1T , was isolated from pigpen sawdust bedding in Xiamen, Fujian Province, China. Cells grew at 10-50 °C, pH 6.0-9.0, up to 12 % (w/v) NaCl, resisted vibriostatic agent O/129 and were negative for gelatin and alginate hydrolysis. No growth on thiosulfate citrate bile salts sucrose agar medium. Based on 16S rRNA gene sequences and multilocus sequence analysis, this strain should be assigned to the genus Vibrio, with the closest relatives being Vibrio aphrogenes CA-1004T (97...
April 20, 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29675448/intestinal-farnesoid-x-receptor-activation-by-pharmacologic-inhibition-of-the-organic-solute-transporter-%C3%AE-%C3%AE
#9
Sandra M W van de Wiel, D Rudi de Waart, Ronald P J Oude Elferink, Stan F J van de Graaf
Background & Aims: The organic solute transporter α-β (OSTα-OSTβ) mainly facilitates transport of bile acids across the basolateral membrane of ileal enterocytes. Therefore, inhibition of OSTα-OSTβ might have similar beneficial metabolic effects as intestine-specific agonists of the major nuclear receptor for bile acids, the farnesoid X receptor (FXR). However, no OSTα-OSTβ inhibitors have yet been identified. Methods: Here, we developed a screen to identify specific inhibitors of OSTα-OSTβ using a genetically encoded Förster Resonance Energy Transfer (FRET)-bile acid sensor that enables rapid visualization of bile acid efflux in living cells...
March 2018: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29675044/effects-of-bile-acids-and-nisin-on-the-production-of-enterotoxin-by-clostridium-perfringens-in-a-nutrient-rich-medium
#10
Miseon Park, Fatemeh Rafii
Clostridium perfringens is the second most common cause of bacterial foodborne illness in the United States, with nearly a million cases each year. C. perfringens enterotoxin (CPE), produced during sporulation, damages intestinal epithelial cells by pore formation, which results in watery diarrhea. The effects of low concentrations of nisin and bile acids on sporulation and toxin production were investigated in C. perfringens SM101, which carries an enterotoxin gene on the chromosome, in a nutrient-rich medium...
2018: International Journal of Microbiology
https://www.readbyqxmd.com/read/29673211/the-role-of-gut-microbiota-in-obesity-and-type-2-and-type-1-diabetes-mellitus-new-insights-into-old-diseases
#11
REVIEW
Igor Alexander Harsch, Peter Christopher Konturek
The investigation of the human microbiome is the most rapidly expanding field in biomedicine. Early studies were undertaken to better understand the role of microbiota in carbohydrate digestion and utilization. These processes include polysaccharide degradation, glycan transport, glycolysis, and short-chain fatty acid production. Recent research has demonstrated that the intricate axis between gut microbiota and the host metabolism is much more complex. Gut microbiota—depending on their composition—have disease-promoting effects but can also possess protective properties...
April 17, 2018: Medical Sciences: Open Access Journal
https://www.readbyqxmd.com/read/29672888/a-novel-fibroblast-growth-factor-15-dependent-and-bile-acid-independent-promotion-of-liver-regeneration-in-mice
#12
Bo Kong, Runbin Sun, Mingxing Huang, Monica D Chow, Xiao-Bo Zhong, Wen Xie, Yi-Horng Lee, Grace L Guo
The role of intestine-derived factors in promoting liver regeneration after partial hepatectomy (PHx) are not entirely known, but bile acids (BAs) and fibroblast growth factor 15 (Fgf15) that is highly expressed in the mouse ileum could promote hepatocyte proliferation. Fgf15 strongly suppresses the synthesis of BAs and emerging evidence indicates that Fgf15 is important for liver regeneration. The mechanisms by which Fgf15 promotes liver regeneration are unclear, but Fgf15 may do so indirectly by reducing BA levels and/or directly by promoting cell proliferation...
April 19, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29672606/a-practice-changing-culture-method-relying-on-shaking-substantially-increases-mitochondrial-energy-metabolism-and-functionality-of-human-liver-cell-lines
#13
Aziza A A Adam, Vincent A van der Mark, Joanne M Donkers, Manon E Wildenberg, Ronald P J Oude Elferink, Robert A F M Chamuleau, Ruurdtje Hoekstra
Practice-changing culturing techniques of hepatocytes are highly required to increase their differentiation. Previously, we found that human liver cell lines HepaRG and C3A acquire higher functionality and increased mitochondrial biogenesis when cultured in the AMC-Bioartificial liver (BAL). Dynamic medium flow (DMF) is one of the major contributors to this stimulatory effect. Recently, we found that DMF-culturing by shaking of HepaRG monolayers resulted in higher mitochondrial biogenesis. Here we further investigated the effect of DMF-culturing on energy metabolism and hepatic functionality of HepaRG and C3A monolayers...
2018: PloS One
https://www.readbyqxmd.com/read/29672156/ursodeoxycholic-acid-protects-against-intestinal-barrier-breakdown-by-promoting-enterocyte-migration-via-egfr-and-cox-2-dependent-mechanisms
#14
Jamie M Golden, Oswaldo H Escobar, Michelle Vl Nguyen, Michael U Mallicote, Patil Kavarian, Mark R Frey, Christopher P Gayer
The intestinal barrier is often disrupted in disease states, and intestinal barrier failure leads to sepsis. Ursodeoxycholic acid (UDCA) is a bile acid that may protect the intestinal barrier. We hypothesized that UDCA would protect the intestinal epithelium in injury models. To test this hypothesis, we utilized an in vitro wound healing assay and a mouse model of intestinal barrier injury. We found that UDCA stimulates intestinal epithelial cell migration in vitro, and this migration was blocked by inhibition of COX-2, EGFR, or ERK...
April 19, 2018: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/29671538/stable-coronary-artery-disease-treatment
#15
Michael M Braun, William A Stevens, Craig H Barstow
Stable coronary artery disease refers to a reversible supply/demand mismatch related to ischemia, a history of myocardial infarction, or the presence of plaque documented by catheterization or computed tomography angiography. Patients are considered stable if they are asymptomatic or their symptoms are controlled by medications or revascularization. Treatment involves risk factor management, antiplatelet therapy, and antianginal medications. Tobacco cessation, exercise, and weight loss are the most important lifestyle modifications...
March 15, 2018: American Family Physician
https://www.readbyqxmd.com/read/29670889/high-prevalence-of-cholestasis-with-increased-conjugated-bile-acids-in-inflammatory-bowel-diseases-patients
#16
Marc Girardin, Antoine Hadengue, Jean-Louis Frossard The Swiss Ibd Cohort Study Group
AIM: To investigate the prevalence and causes of cholestasis in patients with inflammatory bowel diseases in the Swiss Inflammatory Bowel Diseases Cohort. METHODS: A retrospective cohort study was performed of all the patients in the Swiss Inflammatory bowel disease Cohort. Total bile acid was measured for all patients and cholestasis was defined as a concentration > 8 μmol/L. The characteristics of patients with or without cholestasis were compared. Bile acid profiles were then determined for 80 patients with high total bile acid and 80 matched patients with low total bile acid...
April 16, 2018: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/29670816/the-association-between-hsd3b7-gene-variant-and-parkinson-s-disease-in-ethnic-chinese
#17
Zhong-Jiao Lu, Ling Wang, Xiao-Yi Sun, Jun-Ying Li, Lan Cheng, Nan-Nan Li, Rong Peng
Objectives: Studies at the genomewide level of Parkinson's disease (PD) suggested a significant association between the Hydroxy-delta-5-steroid dehydrogenase, 3 beta- and steroid delta isomerase 7 ( HSD3B7 ) gene rs9938550 variant and a decreased risk for PD. But its effect has only been discussed in Caucasian populations, and no phenotypic characteristics were included. To investigate the novel variant for PD in Chinese Han populations, we performed an association analysis of rs9938550 variant in a large cohort...
April 2018: Brain and Behavior
https://www.readbyqxmd.com/read/29670470/maternal-plasma-metabolomic-profiles-in-spontaneous-preterm-birth-preliminary-results
#18
Barbara Lizewska, Joanna Teul, Pawel Kuc, Adam Lemancewicz, Karol Charkiewicz, Joanna Goscik, Marian Kacerovsky, Ramkumar Menon, Wojciech Miltyk, Piotr Laudanski
Objective: To profile maternal plasma metabolome in spontaneous preterm birth. Method: In this retrospective case-control study, we have examined plasma of patient with preterm birth (between 22 and 36 weeks of pregnancy ( n = 57)), with threatened preterm labor (between 23 and 36 weeks of pregnancy ( n = 49)), and with term delivery ( n = 25). Plasma samples were analysed using liquid chromatography quadrupole time-of-flight mass spectrometry (LC-Q-TOF-MS) in positive and negative polarity modes...
2018: Mediators of Inflammation
https://www.readbyqxmd.com/read/29669937/bile-acids-regulate-cysteine-catabolism-and-glutathione-regeneration-to-modulate-hepatic-sensitivity-to-oxidative-injury
#19
Yifeng Wang, Jibiao Li, David Matye, Yuxia Zhang, Katie Dennis, Wen-Xing Ding, Tiangang Li
Bile acids are signaling molecules that critically control hepatocellular function. Disrupted bile acid homeostasis may be implicated in the pathogenesis of chronic liver diseases. Glutathione is an important antioxidant that protects the liver against oxidative injury. Various forms of liver disease share the common characteristics of reduced cellular glutathione and elevated oxidative stress. This study reports a potentially novel physiological function of bile acids in regulating hepatic sulfur amino acid and glutathione metabolism...
April 19, 2018: JCI Insight
https://www.readbyqxmd.com/read/29669304/safety-assessment-and-functional-properties-of-four-enterococci-strains-isolated-from-regional-argentinean-cheese
#20
Gabriela P Martino, Martín Espariz, Gabriel Gallina Nizo, Luis Esteban, Víctor S Blancato, Christian Magni
The members of the Enterococcus genus are widely distributed in nature. Its strains have been extensively reported to be present in plant surfaces, soil, water and food. In an attempt to assess their potential application in food industry, four Enterococcus faecium group-strains recently isolated from Argentinean regional cheese products were evaluated using a combination of whole genome analyses and in vivo assays. In order to identify these microorganisms at species level, in silico analyses using their newly reported sequences were conducted...
April 11, 2018: International Journal of Food Microbiology
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