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Gut inflammation

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https://www.readbyqxmd.com/read/29049404/low-complexity-microbiota-in-the-duodenum-of-children-with-newly-diagnosed-ulcerative-colitis
#1
Fei Sjöberg, Cecilia Barkman, Intawat Nookaew, Sofia Östman, Ingegerd Adlerberth, Robert Saalman, Agnes E Wold
BACKGROUND: Inflammatory bowel disease (IBD) is characterized by gut dysbiosis. To date, the large bowel microbiota has been in focus. However, the microbiota of the small intestine may also be of importance, as the small bowel is a site for the induction and control of mucosal immune responses, which can be modulated by constituents of the local microbiota. METHODS: Duodenal fluids were collected during diagnostic work-up of treatment-naïve children who were suspected of having IBD...
2017: PloS One
https://www.readbyqxmd.com/read/29049360/the-bacterial-virulence-factor-caga-induces-microbial-dysbiosis-that-contributes-to-excessive-epithelial-cell-proliferation-in-the-drosophila-gut
#2
Tiffani Alvey Jones, Diane Z Hernandez, Zoë C Wong, Anica M Wandler, Karen Guillemin
Gut microbiota facilitate many aspects of human health and development, but dysbiotic microbiota can promote hyperplasia and inflammation and contribute to human diseases such as cancer. Human patients infected with the gastric cancer-causing bacterium Helicobacter pylori have altered microbiota; however, whether dysbiosis contributes to disease in this case is unknown. Many H. pylori human disease phenotypes are associated with a potent virulence protein, CagA, which is translocated into host epithelial cells where it alters cell polarity and manipulates host-signaling pathways to promote disease...
October 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29049037/fractures-and-the-gut-microbiome
#3
Tara McGinty, Paddy W G Mallon
PURPOSE OF REVIEW: The role of the gut microbiome in the pathogenesis of several inflammatory, non-AIDS comorbidities, such as cardiovascular disease, cognitive impairment and liver disease has become a focus of recent research. Low bone mineral density (BMD) and increased fracture incidence in people living with HIV (PLWH) is also widely reported, however, the relationship between alterations in the gut microbiome and bone disease in PLWH has not been previously reviewed. RECENT FINDINGS: Murine models that manipulate the gut microbiome, either through breeding of 'germ-free' mice or antibiotic-depleted gut microbiome, show differences in bone mineral density and bone mass in those with altered gut microbiome...
October 18, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/29046417/life-history-adjustments-to-intestinal-inflammation-in-a-gut-nematode
#4
Cédric Lippens, Emmanuel Guivier, Anthony Ollivier, Bruno Faivre, Gabriele Sorci
Many parasitic nematodes establish chronic infections. This implies a finely tuned interaction with the host immune response in order to avoid infection clearance. Although a number of immune interference mechanisms have been described in nematodes, how parasites adapt to the immune environment provided by their hosts remains largely unexplored. Here, we used the gastrointestinal nematode Heligmosomoides polygyrus to investigate the plasticity of life history traits and immunomodulatory mechanisms in response to intestinal inflammation...
October 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29045253/gut-microbial-diversity-in-hiv-infection-post-combined-antiretroviral-therapy-a-key-target-for-prevention-of-cardiovascular-disease
#5
Mohamed El-Far, Cécile L Tremblay
PURPOSE OF REVIEW: Although the HIV-infected population is living longer and getting older under current treatment regimens, significant challenges arise for health management as the infection is associated with various premature aging phenotypes, particularly increased incidence of cardiovascular diseases (CVDs). Here we review the current understanding of HIV-related gut dysbiosis in association with CVD and advances in clinical trials aiming to restore gut microbial diversity. RECENT FINDING: Identification of a unique signature for gut dysbiosis in HIV infection between different cohorts remains challenging...
October 17, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/29045252/altered-gut-microbiome-composition-in-hiv-infection-causes-effects-and-potential-intervention
#6
Alessandra Bandera, Ilaria De Benedetto, Giorgio Bozzi, Andrea Gori
PURPOSE OF REVIEW: Aim of this review is to summarize the alterations occurring in gut microbiome composition after HIV infection, and to underline how intestinal dysbiosis can affect immune homeostasis, immune recovery, and persisting immune activation under antiretroviral therapy (ART). Many interventions have been suggested, mostly with inconclusive results. RECENT FINDINGS: Recent evidence showed that gut microbiota from HIV-infected patients harbor reproducible differences compared to uninfected individuals...
October 17, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/29044140/therapeutic-potential-of-bifidobacterium-breve-strain-a1-for-preventing-cognitive-impairment-in-alzheimer-s-disease
#7
Yodai Kobayashi, Hirosuke Sugahara, Kousuke Shimada, Eri Mitsuyama, Tetsuya Kuhara, Akihito Yasuoka, Takashi Kondo, Keiko Abe, Jin-Zhong Xiao
It has previously been shown that the consumption of probiotics may have beneficial effects not only on peripheral tissues but also on the central nervous system and behavior via the microbiota-gut-brain axis, raising the possibility that treatment with probiotics could be an effective therapeutic strategy for managing neurodegenerative disorders. In this study, we investigated the effects of oral administration of Bifidobacterium breve strain A1 (B. breve A1) on behavior and physiological processes in Alzheimer's disease (AD) model mice...
October 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29043006/does-dietary-fat-affect-inflammatory-markers-in-overweight-and-obese-individuals-a-review-of-randomized-controlled-trials-from-2010-to-2016
#8
REVIEW
Vibeke H Telle-Hansen, Jacob J Christensen, Stine M Ulven, Kirsten B Holven
BACKGROUND: Obesity, a major cause of death and disability, is increasing worldwide. Obesity is characterized by a chronic, low-grade inflammatory state which is suggested to play a critical role in the development of obesity-related diseases like cardiovascular diseases and type 2 diabetes. In fact, in the hours following consumption of a meal, a transient increase in inflammatory markers occurs, a response that is exaggerated in obese subjects. Dietary composition, including content of dietary fatty acids, may affect this inflammatory response both acutely and chronically, and thereby be predictive of progression of disease...
2017: Genes & Nutrition
https://www.readbyqxmd.com/read/29043005/impact-of-supplementation-with-a-food-derived-microbial-community-on-obesity-associated-inflammation-and-gut-microbiota-composition
#9
Marianna Roselli, Chiara Devirgiliis, Paola Zinno, Barbara Guantario, Alberto Finamore, Rita Rami, Giuditta Perozzi
BACKGROUND: Obesity is a complex pathology associated with dysbiosis, metabolic alterations, and low-grade chronic inflammation promoted by immune cells, infiltrating and populating the adipose tissue. Probiotic supplementation was suggested to be capable of counteracting obesity-associated immune and microbial alterations, based on its proven immunomodulatory activity and positive effect on gut microbial balance. Traditional fermented foods represent a natural source of live microbes, including environmental strains with probiotic features, which could transiently colonise the gut...
2017: Genes & Nutrition
https://www.readbyqxmd.com/read/29041989/links-of-gut-microbiota-composition-with-alcohol-dependence-syndrome-and-alcoholic-liver-disease
#10
Veronika B Dubinkina, Alexander V Tyakht, Vera Y Odintsova, Konstantin S Yarygin, Boris A Kovarsky, Alexander V Pavlenko, Dmitry S Ischenko, Anna S Popenko, Dmitry G Alexeev, Anastasiya Y Taraskina, Regina F Nasyrova, Evgeny M Krupitsky, Nino V Shalikiani, Igor G Bakulin, Petr L Shcherbakov, Lyubov O Skorodumova, Andrei K Larin, Elena S Kostryukova, Rustam A Abdulkhakov, Sayar R Abdulkhakov, Sergey Y Malanin, Ruzilya K Ismagilova, Tatiana V Grigoryeva, Elena N Ilina, Vadim M Govorun
BACKGROUND: Alcohol abuse has deleterious effects on human health by disrupting the functions of many organs and systems. Gut microbiota has been implicated in the pathogenesis of alcohol-related liver diseases, with its composition manifesting expressed dysbiosis in patients suffering from alcoholic dependence. Due to its inherent plasticity, gut microbiota is an important target for prevention and treatment of these diseases. Identification of the impact of alcohol abuse with associated psychiatric symptoms on the gut community structure is confounded by the liver dysfunction...
October 17, 2017: Microbiome
https://www.readbyqxmd.com/read/29041775/lychee-litchi-chinensis-sonn-pulp-phenolic-extract-provides-protection-against-alcoholic-liver-injury-in-mice-by-alleviating-intestinal-microbiota-dysbiosis-intestinal-barrier-dysfunction-and-liver-inflammation
#11
Juan Xiao, Ruifen Zhang, Qiuyun Zhou, Lei Liu, Fei Huang, Yuanyuan Deng, Yongxuan Ma, Zhencheng Wei, Xiaojun Tang, Mingwei Zhang
Liver injury is the most common consequence of alcohol abuse, which is promoted by the inflammatory response triggered by gut-derived endotoxins produced as a consequence of intestinal microbiota dysbiosis and barrier dysfunction. The aim of this study was to investigate whether modulation of intestinal microbiota and barrier function, and liver inflammation contributes to the hepatoprotective effect of lychee pulp phenolic extract (LPPE) in alcohol-fed mice. Mice were treated with an ethanol-containing liquid diet alone or in combination with LPPE for 8 weeks...
October 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29040501/tissue-damage-induced-midgut-stem-cell-proliferation-and-microbial-dysbiosis-in-spodoptera-litura
#12
Neeti Pandey, Raman Rajagopal
In the past decade, gut microbiota has come to the fore in search for the cause of disregulation in intestinal homeostasis. Here, we report a possible link between gut microbial dynamics and stress inducing factors using the leaf worm moth Spodoptera litura as a model organism. Investigation reveals that S. litura exhibits dysbiosis i.e. alteration in the gut microbiota composition that might induce or suppress inflammation upon exposure to dextran sulfate, sodium salt, a tissue damaging agent (DSS, 40kD). It primarily corresponds to an expansion of the bacterial phylotypes Enterobacter sp...
October 11, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/29039977/chronic-disruptions-of-circadian-sleep-regulation-induce-specific-proinflammatory-responses-in-the-rat-colon
#13
Lenka Polidarová, Pavel Houdek, Alena Sumová
Exposure to environmental conditions that disturb the daily rhythms has been shown to enhance the proinflammatory responses of immunostimulant-challenged immune system. However, it is not known whether circadian disturbances may stimulate unchallenged immune responses and thus contribute per se to the development of inflammation-related diseases. Our aim was to ascertain an effect of various conditions threatening the behavioral activity/rest cycle regulation, namely aging with or without melatonin, 6 h advance/delay phase shifts in the light/dark cycle repeated with a 2-day frequency and constant light, on expression of immune markers in the rat colon...
October 17, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29038503/gastric-acid-suppression-promotes-alcoholic-liver-disease-by-inducing-overgrowth-of-intestinal-enterococcus
#14
Cristina Llorente, Peter Jepsen, Tatsuo Inamine, Lirui Wang, Sena Bluemel, Hui J Wang, Rohit Loomba, Jasmohan S Bajaj, Mitchell L Schubert, Masoumeh Sikaroodi, Patrick M Gillevet, Jun Xu, Tatiana Kisseleva, Samuel B Ho, Jessica DePew, Xin Du, Henrik T Sørensen, Hendrik Vilstrup, Karen E Nelson, David A Brenner, Derrick E Fouts, Bernd Schnabl
Chronic liver disease is rising in western countries and liver cirrhosis is the 12th leading cause of death worldwide. Simultaneously, use of gastric acid suppressive medications is increasing. Here, we show that proton pump inhibitors promote progression of alcoholic liver disease, non-alcoholic fatty liver disease, and non-alcoholic steatohepatitis in mice by increasing numbers of intestinal Enterococcus spp. Translocating enterococci lead to hepatic inflammation and hepatocyte death. Expansion of intestinal Enterococcus faecalis is sufficient to exacerbate ethanol-induced liver disease in mice...
October 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/29038361/tumor-necrosis-factor-%C3%AE-decreases-aquaporin-3-expression-in-intestinal-epithelial-cells-through-inhibition-of-constitutive-transcription
#15
Michael A Peplowski, Andrew J Vegso, Vadim Iablokov, Michael Dicay, Raza S Zaheer, Bernard Renaux, David Proud, Morley D Hollenberg, Paul L Beck, Wallace K MacNaughton
Inflammatory diseases of the gut are associated with altered electrolyte and water transport, leading to the development of diarrhea. Epithelially expressed aquaporins (AQPs) are downregulated in inflammation, although the mechanisms involved are not known. We hypothesized that AQP3 expression in intestinal epithelial cells is altered in intestinal inflammation and that these changes are driven by tumor necrosis factor (TNF) α Human colonic adenocarcinoma (HT-29) cells were treated with TNFα to investigate signaling mechanisms in vitro...
October 2017: Physiological Reports
https://www.readbyqxmd.com/read/29037316/intestinal-parasites-infection-protective-effect-in-rheumatoid-arthritis
#16
Sandra Maximiano de Oliveira, Ana Paula Monteiro Gomides, Lícia Maria Henrique da Mota, Caliandra Maria Bezerra Luna Lima, Francisco Airton Castro Rocha
Rheumatoid arthritis (RA) is a systemic autoimmune inflammatory disease, with a progressive course, characterized by chronic synovitis that may evolve with deformities and functional disability, and whose early treatment minimizes joint damage. Its etiopathogenesis is not fully elucidated but comprises immunologic responses mediated by T helper cells (Th1). An apparent minor severity of RA in patients from regions with lower income could be associated with a higher prevalence of gut parasites, especially helminths...
September 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/29037268/probiotics-prebiotics-synbiotics-and-insulin-sensitivity
#17
Y A Kim, J B Keogh, P M Clifton
Animal studies indicate that the composition of gut microbiota may be involved in the progression of insulin resistance to type 2 diabetes. Probiotics and/or prebiotics could be a promising approach to improve insulin sensitivity by favourably modifying the composition of the gut microbial community, reducing intestinal endotoxin concentrations and decreasing energy harvest. The aim of the present review was to investigate the effects of probiotics, prebiotics and synbiotics (a combination of probiotics and prebiotics) on insulin resistance in human clinical trials and to discuss the potential mechanisms whereby probiotics and prebiotics improve glucose metabolism...
October 17, 2017: Nutrition Research Reviews
https://www.readbyqxmd.com/read/29035948/hiv-and-aging-role-of-the-microbiome
#18
Seema N Desai, Alan L Landay
PURPOSE OF REVIEW: The purpose of this article is to review age-associated alterations in microbiota composition, diversity and functional features in context of immune senescence, chronic inflammation and comorbidities associated with HIV infection. The overall goal is to assess whether modulating the microbiome will likely improve resilience of the immune system and augment return to health. RECENT FINDINGS: Alteration in the gut microbiota composition diversity and function occur in HIV and aging...
October 14, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/29034330/perinatal-bisphenol-a-exposure-induces-chronic-inflammation-in-rabbit-offspring-via-modulation-of-gut-bacteria-and-their-metabolites
#19
Lavanya Reddivari, D N Rao Veeramachaneni, William A Walters, Catherine Lozupone, Jennifer Palmer, M K Kurundu Hewage, Rohil Bhatnagar, Amnon Amir, Mary J Kennett, Rob Knight, Jairam K P Vanamala
Bisphenol A (BPA) accumulates in the maturing gut and liver in utero and is known to alter gut bacterial profiles in offspring. Gut bacterial dysbiosis may contribute to chronic colonic and systemic inflammation. We hypothesized that perinatal BPA exposure-induced intestinal (and liver) inflammation in offspring is due to alterations in the microbiome and colonic metabolome. The 16S rRNA amplicon sequencing analysis revealed differences in beta diversity with a significant reduction in the relative abundances of short-chain fatty acid (SCFA) producers such as Oscillospira and Ruminococcaceae due to BPA exposure...
September 2017: MSystems
https://www.readbyqxmd.com/read/29034327/high-fat-diet-changes-fungal-microbiomes-and-interkingdom-relationships-in-the-murine-gut
#20
Timothy Heisel, Emmanuel Montassier, Abigail Johnson, Gabriel Al-Ghalith, Yi-Wei Lin, Li-Na Wei, Dan Knights, Cheryl A Gale
Dietary fat intake and shifts in gut bacterial community composition are associated with the development of obesity. To date, characterization of microbiota in lean versus obese subjects has been dominated by studies of gut bacteria. Fungi, recently shown to affect gut inflammation, have received little study for their role in obesity. We sought to determine the effects of high-fat diet on fungal and bacterial community structures in a mouse model using the internal transcribed spacer region 2 (ITS2) of fungal ribosomal DNA (rDNA) and the 16S rRNA genes of bacteria...
September 2017: MSphere
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