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https://www.readbyqxmd.com/read/29161793/effect-of-rifaximin-on-hepatic-fibrosis-in-bile-duct-ligated-rat-model
#1
Seung Kak Shin, Oh Sang Kwon, Jong Joon Lee, Yeon Ho Park, Cheol Soo Choi, Sung Hwan Jeong, Duck Joo Choi, Yun Soo Kim, Ju Hyun Kim
Background/Aims: The translocation of bacteria and their lipopolysaccharides from the gut can promote fibrosis in cirrhotic patients. The aim of this study was to investigate the effects of rifaximin on hepatic fibrosis in a bile duct-ligated rat model. Methods: The bile duct ligation (BDL) was carried out for eight days (acute injury model: sham-operated rats [G1], BDL rats [G2], and BDL rats treated with rifaximin [G3]) or 22 days (chronic injury model: sham-operated rats [G4], BDL rats [G5], and BDL rats treated with rifaximin [G6])...
November 25, 2017: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/29161774/building-trophic-specializations-that-result-in-substantial-niche-partitioning-within-a-young-adaptive-radiation
#2
Luz Patricia Hernandez, Dominique Adriaens, Christopher H Martin, Peter C Wainwright, Bert Masschaele, Manuel Dierick
Dietary partitioning often accompanies the increased morphological diversity seen during adaptive radiations within aquatic systems. While such niche partitioning would be expected in older radiations, it is unclear how significant morphological divergence occurs within a shorter time period. Here we show how differential growth in key elements of the feeding mechanism can bring about pronounced functional differences among closely related species. An incredibly young adaptive radiation of three Cyprinodon species residing within hypersaline lakes in San Salvador Island, Bahamas, has recently been described...
November 21, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29161678/preliminary-evaluation-of-pathogenic-bacteria-loading-on-organic-municipal-solid-waste-compost-and-vermicompost
#3
Nuhaa Soobhany
The use of composts or vermicomposts derived from organic fraction of Municipal Solid Waste (OFMSW) brought about certain disagreement in terms of high level of bacterial pathogens, thereby surpassing the legal restrictions. This preliminary study was undertaken to compare the evolution of pathogenic bacteria on OFMSW compost against vermicompost (generated by Eudrilus eugeniae) with promises of achieving sanitation goals. Analysis to quality data showed that OFMSW vermicomposting caused a moderately higher reduction in total coliforms in contrast to composting...
November 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29161643/effect-of-vacuum-and-modified-atmosphere-packaging-on-the-microbiological-chemical-and-sensory-properties-of-tropical-red-drum-sciaenops-ocellatus-fillets-stored-at-4%C3%A2-c
#4
Adèle Silbande, Sandra Adenet, Christine Chopin, Josiane Cornet, Juliette Smith-Ravin, Katia Rochefort, Françoise Leroi
AIMS: The effect of vacuum (VP - 4°C) and CO2/N2-atmosphere (MAP - 4°C) packaging on the quality of red drum fillets compared with whole gutted iced fish was investigated. METHODS AND RESULTS: A metagenomic approach, bacterial enumeration and isolation, biochemical and sensory analyses were carried out. The organoleptic rejection of whole fish was observed at day 15 whereas VP and MAP fillets appeared unacceptable only after 29days. At these dates, total mesophilic counts reached 10(7)-10(8)CFU g(-1)...
October 26, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29161551/morphometric-behavioral-and-genomic-evidence-for-a-new-orangutan-species
#5
Alexander Nater, Maja P Mattle-Greminger, Anton Nurcahyo, Matthew G Nowak, Marc de Manuel, Tariq Desai, Colin Groves, Marc Pybus, Tugce Bilgin Sonay, Christian Roos, Adriano R Lameira, Serge A Wich, James Askew, Marina Davila-Ross, Gabriella Fredriksson, Guillem de Valles, Ferran Casals, Javier Prado-Martinez, Benoit Goossens, Ernst J Verschoor, Kristin S Warren, Ian Singleton, David A Marques, Joko Pamungkas, Dyah Perwitasari-Farajallah, Puji Rianti, Augustine Tuuga, Ivo G Gut, Marta Gut, Pablo Orozco-terWengel, Carel P van Schaik, Jaume Bertranpetit, Maria Anisimova, Aylwyn Scally, Tomas Marques-Bonet, Erik Meijaard, Michael Krützen
No abstract text is available yet for this article.
November 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29161429/crosstalk-between-the-microbiome-and-epigenome-messages-from-bugs
#6
Yufeng Qin, Paul A Wade
Mammals exist in a complicated symbiotic relationship with their gut microbiome, which is postulated to have broad impacts on host health and disease. As omics-based technologies have matured, the potential mechanisms by which the microbiome affects host physiology are being addressed. The gut microbiome, which provides environmental cues, can modify host cell responses to stimuli through alterations in the host epigenome and, ultimately, gene expression. Increasing evidence highlights microbial generation of bioactive compounds that impact the transcriptional machinery in host cells...
November 17, 2017: Journal of Biochemistry
https://www.readbyqxmd.com/read/29161417/bolus-weekly-vitamin-d3-supplementation-impacts-gut-and-airway-microbiota-in-adults-with-cystic-fibrosis-a-double-blind-randomized-placebo-controlled-clinical-trial
#7
Mansi Kanhere, Jiabei He, Benoit Chassaing, Thomas R Ziegler, Jessica A Alvarez, Elizabeth A Ivie, Li Hao, John Hanfelt, Andrew T Gewirtz, Vin Tangpricha
Background: Disruption of gut microbiota may exacerbate severity of cystic fibrosis (CF). Vitamin D deficiency is a common co-morbidity in patients with CF that may influence composition of the gut microbiota. Objectives: Compare microbiota of vitamin D sufficient and insufficient CF patients, and assess impact of a weekly high-dose vitamin D3 bolus regimen on gut and airway microbiome in adults with CF and vitamin D insufficiency (25(OH)D <30 ng/mL). Design: Forty-one subjects with CF were classified into two groups - vitamin D insufficient (n=23) and vitamin D sufficient (n=18)...
November 16, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29161377/transmission-and-persistence-of-incf-conjugative-plasmids-in-the-gut-microbiota-of-full-term-infants
#8
Anuradha Ravi, Lorena Valdés-Varela, Miguel Gueimonde, Knut Rudi
Conjugative plasmids represent major reservoirs for horizontal transmission of antibiotic resistance (AR) and virulence genes. Our knowledge about the ecology and persistence of these plasmids in the gut microbiota remains limited. The IncF plasmids are the most widespread in clinical samples and in healthy humans. Therefore, the main aim is to study their ecology and association with the developing gut microbiota. Using a longitudinal (2, 10, 30 and 90 days) cohort of full-term infants, we investigated the transmission and persistence of IncFIA and IncFIB plasmids...
November 17, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/29161267/sugar-industry-sponsorship-of-germ-free-rodent-studies-linking-sucrose-to-hyperlipidemia-and-cancer-an-historical-analysis-of-internal-documents
#9
Cristin E Kearns, Dorie Apollonio, Stanton A Glantz
In 1965, the Sugar Research Foundation (SRF) secretly funded a review in the New England Journal of Medicine that discounted evidence linking sucrose consumption to blood lipid levels and hence coronary heart disease (CHD). SRF subsequently funded animal research to evaluate sucrose's CHD risks. The objective of this study was to examine the planning, funding, and internal evaluation of an SRF-funded research project titled "Project 259: Dietary Carbohydrate and Blood Lipids in Germ-Free Rats," led by Dr. W...
November 2017: PLoS Biology
https://www.readbyqxmd.com/read/29161088/mechanistic-basis-for-obesity-related-increases-in-ozone-induced-airway-hyperresponsiveness-in-mice
#10
Stephanie A Shore
Obesity is a risk factor for asthma, especially nonallergic asthma. Ozone, a common air pollutant, is a nonallergic asthma trigger. Importantly, ozone-induced decrements in lung function are greater in obese and overweight human subjects than in lean individuals. Obese mice also exhibit exaggerated pulmonary responses to ozone. Ozone causes greater increases in pulmonary resistance, in bronchoalveolar lavage neutrophils, and in airway hyperresponsiveness in obese than in lean mice. Our data indicate that IL-33 plays a role in mediating these events...
November 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29161086/potential-role-of-the-lung-microbiome-in-shaping-asthma-phenotypes
#11
Kian Fan Chung
The introduction of 16s ribosomal RNA sequencing as a nonculture technique has led to the discovery of the presence of microbiota in the lower airways of healthy individuals. These bacterial communities may originate from the mouth and nasopharynx or from the environment by inhalation. The microbial composition of the lower airways may be modulated by dietary factors, antibiotic therapy, and microbial infections, particularly in early life. In addition, circulatory products from gut microbiota may influence the lung microbiota to maintain mucosal immunity...
November 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29161082/gut-microbiome-and-obesity-how-to-prove-causality
#12
Philippe Gérard
In recent years, the gut microbiota (the microorganisms that live in our digestive tract) has become an area of great interest. Indeed, this intestinal microbial community performs essential functions in maintaining our health, and has been proven to influence host physiology and metabolism. Thereby, dysregulation of this gut microbiota may be implicated in the development of various diseases, including obesity. However, studies rarely assess causality, which requires the use of germ-free animals and microbiota transplant...
November 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29160817/impact-of-high-dose-multi-strain-probiotic-supplementation-on-neurocognitive-performance-and-central-nervous-system-immune-activation-of-hiv-1-infected-individuals
#13
Giancarlo Ceccarelli, Jason M Brenchley, Eugenio Nelson Cavallari, Giuseppe Corano Scheri, Mariangela Fratino, Claudia Pinacchio, Ivan Schietroma, Saeid Najafi Fard, Carolina Scagnolari, Ivano Mezzaroma, Vincenzo Vullo, Gabriella d'Ettorre
BACKGROUND: Gut microbiota has metabolic activity which influences mucosal homeostasis, local and systemic immune responses, and other anatomical systems (i.e., brain). The effects of dysbiosis are still poorly studied in Human Immunodeficiency Virus-1 (HIV-1) positive subjects and insufficient data are available on the impairment of the gut-brain axis, despite neurocognitive disorders being commonly diagnosed in these patients. This study evaluated the impact of a probiotic supplementation strategy on intrathecal immune activation and cognitive performance in combined antiretroviral therapy (cART) treated HIV-1 infected subjects...
November 21, 2017: Nutrients
https://www.readbyqxmd.com/read/29160815/assessment-of-bifidobacterium-species-using-groel-gene-on-the-basis-of-illumina-miseq-high-throughput-sequencing
#14
Lujun Hu, Wenwei Lu, Linlin Wang, Mingluo Pan, Hao Zhang, Jianxin Zhao, Wei Chen
The next-generation high-throughput sequencing techniques have introduced a new way to assess the gut's microbial diversity on the basis of 16S rRNA gene-based microbiota analysis. However, the precise appraisal of the biodiversity of Bifidobacterium species within the gut remains a challenging task because of the limited resolving power of the 16S rRNA gene in different species. The groEL gene, a protein-coding gene, evolves quickly and thus is useful for differentiating bifidobacteria. Here, we designed a Bifidobacterium-specific primer pair which targets a hypervariable sequence region within the groEL gene that is suitable for precise taxonomic identification and detection of all recognized species of the genus Bifidobacterium so far...
November 21, 2017: Genes
https://www.readbyqxmd.com/read/29160807/entamoeba-histolytica-under-oxidative-stress-what-countermeasure-mechanisms-are-in-place
#15
REVIEW
Erika Pineda, Doranda Perdomo
Entamoeba histolytica is the causative agent of human amoebiasis; it affects 50 million people worldwide and causes approximately 100,000 deaths per year. Entamoeba histolytica is an anaerobic parasite that is primarily found in the colon; however, for unknown reasons, it can become invasive, breaching the gut barrier and migrating toward the liver causing amoebic liver abscesses. During the invasive process, it must maintain intracellular hypoxia within the oxygenated human tissues and cellular homeostasis during the host immune defense attack when it is confronted with nitric oxide and reactive oxygen species...
November 21, 2017: Cells
https://www.readbyqxmd.com/read/29160065/transformation-of-the-anticancer-drug-doxorubicin-in-the-human-gut-microbiome
#16
Austin Yan, Elizabeth Culp, Julie Perry, Jennifer Lau, Lesley MacNeil, Michael G Surette, Gerard D Wright
Bacteria living in the human gut are implicated in the etiology of several diseases. Moreover, dozens of drugs are metabolized by elements of the gut microbiome, which may have further implications for human health. Here we screened a collection of primary gut isolates for their ability to inactivate the widely used antineoplastic drug doxorubicin and identified a strain of Raoultella planticola as a potent inactivator under anaerobic conditions. We demonstrate that R. planticola deglycosylates doxorubicin to metabolites 7-deoxydoxorubicinol and 7-deoxydoxorubicinolone via a reductive deglycosylation mechanism...
November 21, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/29159997/sporulation-capability-and-amylosome-conservation-among-diverse-human-colonic-and-rumen-isolates-of-the-keystone-starch-degrader-ruminococcus-bromii
#17
Indrani Mukhopadhya, Sarah Morais, Jenny Laverde-Gomez, Paul O Sheridan, Alan W Walker, William Kelly, Athol V Klieve, Diane Ouwerkerk, Sylvia H Duncan, Petra Louis, Nicole Koropatkin, Darrell Cockburn, Ryan Kibler, Philip J Cooper, Carlos Sandoval, Emmanuelle Crost, Nathalie Juge, Edward A Bayer, Harry J Flint
Ruminococcus bromii is a dominant member of the human colonic microbiota that plays a 'keystone' role in degrading dietary resistant starch. Recent evidence from one strain has uncovered a unique cell surface 'amylosome' complex that organizes starch-degrading enzymes. New genome analysis presented here reveals further features of this complex and shows remarkable conservation of amylosome components between human colonic strains from three different continents and a R. bromii strain from the rumen of Australian cattle...
November 21, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/29159825/modulation-of-the-intestinal-bile-acid-fxr-fgf15-axis-improves-alcoholic-liver-disease-in-mice
#18
Phillipp Hartmann, Katrin Hochrath, Angela Horvath, Peng Chen, Caroline T Seebauer, Cristina Llorente, Lirui Wang, Yazen Alnouti, Derrick E Fouts, Peter Stärkel, Rohit Loomba, Sally Coulter, Christopher Liddle, Ruth T Yu, Lei Ling, Stephen J Rossi, Alex M DePaoli, Michael Downes, Ronald M Evans, David A Brenner, Bernd Schnabl
Alcoholic liver disease is associated with changes in the intestinal microbiota. Functional consequences of alcohol-associated dysbiosis are largely unknown. The aim of this study was to identify a mechanism of how changes in the intestinal microbiota contribute to alcoholic liver disease. Metagenomic sequencing of intestinal contents demonstrated that chronic ethanol feeding in mice is associated with an overrepresentation of bacterial genomic DNA encoding choloylglycine hydrolase, which deconjugates bile acids in the intestine...
November 21, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29159701/residues-of-diclofenac-in-tissues-of-vultures-in-india-a-post-ban-scenario
#19
Kanthan Nambirajan, Subramanian Muralidharan, Aditya A Roy, S Manonmani
Populations of three resident Gyps species (Indian white-backed vulture Gyps bengalensis, Indian vulture Gyps indicus, and Slender-billed vulture Gyps tenuirostris) in India have decreased by more than 90% since mid 1990s, and they continue to decline. Experimental studies showed the mortality of vultures to be due to renal failure caused by diclofenac, a nonsteroidal anti-inflammatory drug. India, Pakistan, and Nepal banned the veterinary usage of diclofenac in 2006 to prevent further decline in vulture population...
November 20, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29159583/the-association-between-artificial-sweeteners-and-obesity
#20
REVIEW
Michelle Pearlman, Jon Obert, Lisa Casey
PURPOSE OF REVIEW: The purpose of this paper is to review the epidemiology of obesity and the evolution of artificial sweeteners; to examine the latest research on the effects of artificial sweeteners on the host microbiome, the gut-brain axis, glucose homeostasis, and energy consumption; and to discuss how all of these changes ultimately contribute to obesity. RECENT FINDINGS: Although artificial sweeteners were developed as a sugar substitute to help reduce insulin resistance and obesity, data in both animal models and humans suggest that the effects of artificial sweeteners may contribute to metabolic syndrome and the obesity epidemic...
November 21, 2017: Current Gastroenterology Reports
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