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https://www.readbyqxmd.com/read/29155324/angiotensin-receptor-blocker-irbesartan-reduces-stress-induced-intestinal-inflammation-via-at1a-signaling-and-ace2-dependent-mechanism-in-mice
#1
Maimaiti Yisireyili, Yasuhiro Uchida, Koji Yamamoto, Takayuki Nakayama, Xian Wu Cheng, Tadashi Matsushita, Shigeo Nakamura, Toyoaki Murohara, Kyosuke Takeshita
Stress is associated with pathophysiology of both irritable bowel syndrome (IBS) and hypertension. Angiotensin receptor blockers (ARB) have anti-inflammatory properties via inhibition of angiotensin II (Ang II)/Ang II type I receptor axis (AT1). Inhibition of the classical RAS pathway is also involved in upregulation of angiotensin converting enzyme-2 (ACE2), which activates the Ang-(1-7) /Mas pathway to counteract inflammatory signaling and acts as a partner of the amino acid transporter, B(0)AT-1, to absorb tryptophan for regulation of microbiota-gut-brain axis...
November 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29152632/a-combination-of-quercetin-and-resveratrol-reduces-obesity-in-high-fat-diet-fed-rats-by-modulation-of-gut-microbiota
#2
Le Zhao, Qi Zhang, Weini Ma, Feng Tian, Hongyi Shen, Mingmei Zhou
Resveratrol and quercetin, widely found in foods and vegetables, are plant polyphenols reported to have a wide range of biological activities. Despite their limited bioavailabilities, both resveratrol and quercetin are known to exhibit anti-inflammation and anti-obesity effects. We hypothesized that gut microbiota may be a potential target for resveratrol and quercetin to prevent the development of obesity. The aim of this research was to confirm whether a combination of quercetin and resveratrol (CQR) could restore the gut microbiota dysbiosis induced by a high-fat diet (HFD)...
November 20, 2017: Food & Function
https://www.readbyqxmd.com/read/29152146/breast-tissue-oral-and-urinary-microbiomes-in-breast-cancer
#3
Hannah Wang, Jessica Altemus, Farshad Niazi, Holly Green, Benjamin C Calhoun, Charles Sturgis, Stephen R Grobmyer, Charis Eng
It has long been proposed that the gut microbiome contributes to breast carcinogenesis by modifying systemic estrogen levels. This is often cited as a possible mechanism linking breast cancer and high-fat, low-fiber diets as well as antibiotic exposure, associations previously identified in population-based studies. More recently, a distinct microbiome has been identified within breast milk and tissue, but few studies have characterized differences in the breast tissue microbiota of patients with and without cancer, and none have investigated distant body-site microbiomes outside of the gut...
October 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/29151921/linking-gut-microbiota-to-colorectal-cancer
#4
REVIEW
Hans Raskov, Jakob Burcharth, Hans-Christian Pommergaard
Pre-clinical and clinical data produce mounting evidence that the microbiota is strongly associated with colorectal carcinogenesis. Dysbiosis may change the course of carcinogenesis as microbial actions seem to impact genetic and epigenetic alterations leading to dysplasia, clonal expansion and malignant transformation. Initiation and promotion of colorectal cancer may result from direct bacterial actions, bacterial metabolites and inflammatory pathways. Newer aspects of microbiota and colorectal cancer include quorum sensing, biofilm formation, sidedness and effects/countereffects of microbiota and probiotics on chemotherapy...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/29146454/beyond-immunity-the-imd-pathway-as-a-coordinator-of-host-defense-organismal-physiology-and-behavior
#5
Zongzhao Zhai, Xiaoshan Huang, Yulong Yin
The humoral arm of host defense in Drosophila relies on two evolutionarily conserved NFκB signaling cascades, the Toll and the immune deficiency (Imd) pathways. The Imd signaling pathway senses and neutralizes Gram-negative bacteria. Its activity is tightly adjusted, allowing the host to simultaneously prevent infection by pathogenic bacteria and tolerate beneficial gut microbiota. Over-activation of Imd signaling is detrimental at least in part by causing gut dysbiosis that further exacerbates intestinal pathologies...
November 13, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/29142271/structural-and-functional-differences-in-gut-microbiome-composition-in-patients-undergoing-haemodialysis-or-peritoneal-dialysis
#6
Vanessa Stadlbauer, Angela Horvath, Werner Ribitsch, Bianca Schmerböck, Gernot Schilcher, Sandra Lemesch, Philipp Stiegler, Alexander R Rosenkranz, Peter Fickert, Bettina Leber
Complications of end-stage renal disease (ESRD) are critically related to inflammation. The gut microbiome is a key driver of inflammation. Since dialysis modalities may differently influence the gut microbiome, we aimed to compare the effects of haemodialysis (HD) and peritoneal dialysis (PD) on patients' gut microbiome composition and function. We therefore studied faecal microbiome composition and function as well as inflammation and gut permeability in 30 patients with ESRD (15 HD, 15 PD) and compared to 21 healthy controls...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29141969/cardiovascular-and-antiobesity-effects-of-resveratrol-mediated-through-the-gut-microbiota
#7
REVIEW
Julia K Bird, Daniel Raederstorff, Peter Weber, Robert E Steinert
Encouraging scientific research into the health effects of dietary bioactive resveratrol has been confounded by its rapid first-pass metabolism, which leads to low in vivo bioavailability. Preliminary studies have shown that resveratrol can modulate gut microbiota composition, undergo biotransformation to active metabolites via the intestinal microbiota, or affect gut barrier function. In rodents, resveratrol can modify the relative Bacteroidetes:Firmicutes ratio and reverse the gut microbial dysbiosis caused by a high-fat diet...
November 2017: Advances in Nutrition
https://www.readbyqxmd.com/read/29141957/adherent-invasive-escherichia-coli-in-inflammatory-bowel-disease
#8
REVIEW
Carolina Palmela, Caroline Chevarin, Zhilu Xu, Joana Torres, Gwladys Sevrin, Robert Hirten, Nicolas Barnich, Siew C Ng, Jean-Frederic Colombel
Intestinal microbiome dysbiosis has been consistently described in patients with IBD. In the last decades, Escherichia coli, and the adherent-invasive E coli (AIEC) pathotype in particular, has been implicated in the pathogenesis of IBD. Since the discovery of AIEC, two decades ago, progress has been made in unravelling these bacteria characteristics and its interaction with the gut immune system. The mechanisms of adhesion of AIEC to intestinal epithelial cells (via FimH and cell adhesion molecule 6) and its ability to escape autophagy when inside macrophages are reviewed here...
November 15, 2017: Gut
https://www.readbyqxmd.com/read/29141885/a-role-for-bacterial-urease-in-gut-dysbiosis-and-crohn-s-disease
#9
Josephine Ni, Ting-Chin David Shen, Eric Z Chen, Kyle Bittinger, Aubrey Bailey, Manuela Roggiani, Alexandra Sirota-Madi, Elliot S Friedman, Lillian Chau, Andrew Lin, Ilana Nissim, Justin Scott, Abigail Lauder, Christopher Hoffmann, Gloriany Rivas, Lindsey Albenberg, Robert N Baldassano, Jonathan Braun, Ramnik J Xavier, Clary B Clish, Marc Yudkoff, Hongzhe Li, Mark Goulian, Frederic D Bushman, James D Lewis, Gary D Wu
Gut dysbiosis during inflammatory bowel disease involves alterations in the gut microbiota associated with inflammation of the host gut. We used a combination of shotgun metagenomic sequencing and metabolomics to analyze fecal samples from pediatric patients with Crohn's disease and found an association between disease severity, gut dysbiosis, and bacterial production of free amino acids. Nitrogen flux studies using (15)N in mice showed that activity of bacterial urease, an enzyme that releases ammonia by hydrolysis of host urea, led to the transfer of murine host-derived nitrogen to the gut microbiota where it was used for amino acid synthesis...
November 15, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/29140275/old-fashioned-vs-ultra-processed-based-current-diets-possible-implication-in-the-increased-susceptibility-to-type-1-diabetes-and-celiac-disease-in-childhood
#10
REVIEW
Sandra V Aguayo-Patrón, Ana M Calderón de la Barca
Ultra-processed foods are ready-to-heat and ready-to-eat products created to replace traditional homemade meals and dishes due to convenience and accessibility. Because of their low-fiber and high-fat and sugar composition, these foodstuffs could induce a negative impact on health. They are partially responsible for obesity and chronic non-transmissible diseases; additionally, they could impact in the prevalence of autoimmune diseases such as type 1 diabetes and celiac disease. The rationale is that the nutritional composition of ultra-processed foodstuffs can induce gut dysbiosis, promoting a pro-inflammatory response and consequently, a "leaky gut"...
November 15, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/29138961/blastocystis-subtypes-isolated-from-irritable-bowel-syndrome-patients-and-co-infection-with-helicobacter-pylori
#11
Ayman A El-Badry, Wegdan M Abd El Wahab, Doaa A Hamdy, Alaa Aboud
Irritable bowel syndrome (IBS) is a chronic functional gastrointestinal disease presenting clinically by abdominal pain with alteration of bowel habits. Although IBS has uncertain etiology, chronic gut inflammation due to persistent exposure to an infectious agent including Blastocystis sp. was proposed. The aim of this study was to detect the prevalence of Blastocystis sp. subtype (ST) isolated from stool of IBS patients and to assess Blastocystis sp. and H. pylori co-infection in IBS patients from Beni-Suef Governorate, Egypt...
November 14, 2017: Parasitology Research
https://www.readbyqxmd.com/read/29137890/exposure-to-the-fungicide-propamocarb-causes-gut-microbiota-dysbiosis-and-metabolic-disorder-in-mice
#12
Sisheng Wu, Cuiyuan Jin, Yueyi Wang, Zhengwei Fu, Yuanxiang Jin
Propamocarb (PM) is a widely used fungicide with property of affecting fatty acid and phospholipid biosynthesis in funguses. In this study, we explored its effects on mice gut microbiota and metabolism by exposing mice to 3, 30, and 300 mg/L PM through drinking water for a duration of 28 days. We observed that the transcription of hepatic genes related to regulate lipid metabolism were perturbed by PM exposure. The microbiota in the cecal contents and feces changed during or after PM exposure at phylum or genus levels...
November 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29136611/gut-microbiota-in-health-and-disease
#13
Yuichiro Yamashiro
Intestinal regulatory T (Treg) cells are critical to maintaining immune tolerance to dietary antigens and gut microbiota. This paper reviews several papers on this topic that were recently published by Japanese researchers. Specifically, Prof. K. Honda and his group have found that commensal microbiota capable of metabolizing butyrate induces the differentiation of colonic Treg cells. In a separate work, Prof. Y. Yokoyama and his group used a novel, culture-independent analytical method (the Yakult Intestinal Flora-Scan) for detection of bacteria in the bloodstream...
November 14, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/29133215/myocardial-infarction-and-gut-microbiota-an-incidental-connection
#14
REVIEW
Sepideh Zununi Vahed, Abolfazl Barzegari, Marisol Zuluaga, Didier Letourneur, Graciela Pavon-Djavid
Myocardial infarction (MI) is the main cause of cardiovascular crises that entails serious concerns in mortality, morbidity, and cost to the society. The main therapeutic goal of modern cardiology is to develop novel approaches to minimize inflammation, myocardial necrosis/apoptosis, and enhance cardiac repair after MI. Though MI can be affected by genetic and environmental factors, the search for targeting lifestyle factors has been of greater interest. One such potential factor is the microbiota, the human intestinal microbial community...
November 10, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29133078/enteric-delivery-of-regenerating-family-member-3-alpha-alters-the-intestinal-microbiota-and-controls-inflammation-in-mice-with-colitis
#15
Marion Darnaud, Alexandre Dos Santos, Patrick Gonzalez, Sandrine Augui, Claire Lacoste, Christophe Desterke, Gert De Hertogh, Emma Valentino, Emilie Braun, Jinzi Zheng, Raphael Boisgard, Christel Neut, Laurent Dubuquoy, Franck Chiappini, Didier Samuel, Patricia Lepage, Francesca Guerrieri, Joel Doré, Christian Bréchot, Nicolas Moniaux, Jamila Faivre
BACKGROUND & AIMS: Paneth cell dysfunction causes deficiencies in intestinal C-type lectins and antimicrobial peptides, which leads to dysbiosis of the intestinal microbiota, alters the mucosal barrier, and promotes development of inflammatory bowel diseases. We investigated whether transgenic expression of the human regenerating family member 3 alpha gene (REG3A) alters the fecal microbiota and affects development of colitis in mice. METHODS: We performed studies with C57BL/6 mice that express human regenerating family member 3 alpha (hREG3A) in hepatocytes, via the albumin gene promoter...
November 10, 2017: Gastroenterology
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
#16
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/29131365/gut-microbiota-and-body-composition-in-anorexia-nervosa-inpatients-in-comparison-to-athletes-overweight-obese-and-normal-weight-controls
#17
Sabrina Mörkl, Sonja Lackner, Wolfram Müller, Gregor Gorkiewicz, Karl Kashofer, Andreas Oberascher, Annamaria Painold, Anna Holl, Peter Holzer, Andreas Meinitzer, Harald Mangge, Sandra Holasek
OBJECTIVES: Anorexia nervosa (AN) is a heterogeneous eating disorder associated with alterations of body structure and the gut microbiome. We aimed to investigate the gut microbiota composition of a large female cohort including different BMI groups and activity levels along with body composition parameters. METHOD: 106 female participants were included in this cross-sectional study: AN patients (n = 18), athletes (n = 20), normal weight (n = 26), overweight (n = 22), and obese women (n = 20)...
November 13, 2017: International Journal of Eating Disorders
https://www.readbyqxmd.com/read/29129229/head-injury-profoundly-affects-gut-microbiota-homeostasis-results-of-a-pilot-study
#18
Anne-Judith Waligora-Dupriet, Sophie Lafleur, Christine Charrueau, Caroline Choisy, Luc Cynober, Marie-José Butel, Christophe Moinard
OBJECTIVES: Head injury (HI) induces a hypercatabolic state, dysimmunity, and septic complications that increase morbidity and mortality. Although compromised immune function is usually incriminated in infection occurrence, gut dysbiosis could also be involved in this phenomenon and, to our knowledge, has never been considered. To assess if HI could affect microbiota, we explored the impact of HI on intestinal microbiota in a rodent model of fluid percussion. METHODS: Nineteen rats were randomly assigned to two groups: Healthy rats fed ad libitum (n = 7) and HI rats (n = 12), which received standard enteral nutrition for 4 d...
January 2018: Nutrition
https://www.readbyqxmd.com/read/29121700/difference-in-the-gut-microbiome-between-ovariectomy-induced-obesity-and-diet-induced-obesity
#19
Sungmi Choi, Yu-Jin Hwang, Min-Jeong Shin, Hana Yi
During menopausal transition, the imbalance of estrogen causes body weight gain. Although gut microbiome dysbiosis has been reported in postmenopausal obesity, it is not clear whether there is any difference in the microbiome profile between dietary-induced obesity and postmenopausal obesity. Therefore, in this study, we analyzed intestinal samples from ovariectomized mice and compared them to those of mice with high fat diet-induced obesity. To further evaluate the presence of menopause-specific bacteria-gene interactions, we also analyzed the liver transcriptome...
November 9, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29118762/lc3-associated-phagocytosis-is-required-for-dendritic-cell-inflammatory-cytokine-response-to-gut-commensal-yeast-saccharomyces-cerevisiae
#20
Dimitra Lamprinaki, Gemma Beasy, Aleksandra Zhekova, Alexandra Wittmann, Steve James, Jo Dicks, Yoichiro Iwakura, Shinobu Saijo, Xiaomin Wang, Chung-Wai Chow, Ian Roberts, Tamas Korcsmaros, Ulrike Mayer, Thomas Wileman, Norihito Kawasaki
The human fungal microbiota known as mycobiota is increasingly recognized as a critical factor in human gut health and disease. Non-pathogenic commensal yeasts such as Saccharomyces cerevisiae promote homeostasis in the gut, whereas dysbiosis of the gut mycobiota is associated with inflammation. Glycan-binding receptors (lectins) are key host factors in host-mycobiota interaction in the gut. They are expressed on immune cells such as dendritic cells (DCs) and recognize fungal polysaccharides. This interaction is imperative to mount appropriate immune responses for immune homeostasis in the gut as well as clearance of fungal pathogens...
2017: Frontiers in Immunology
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