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https://www.readbyqxmd.com/read/29147991/the-role-of-the-gut-microbiome-in-multiple-sclerosis-risk-and-progression-towards-characterization-of-the-ms-microbiome
#1
REVIEW
Anne-Katrin Pröbstel, Sergio E Baranzini
Multiple sclerosis (MS) is the prototypic complex disease, in which both genes and the environment contribute to its pathogenesis. To date, > 200 independent loci across the genome have been associated with MS risk. However, these only explain a fraction of the total phenotypic variance, suggesting the possible presence of additional genetic factors, and, most likely, also environmental factors. New DNA sequencing technologies have enabled the sequencing of all kinds of microorganisms, including those living in and around humans (i...
November 16, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/29146862/complete-genome-sequence-of-faecalibacterium-prausnitzii-isolated-from-the-gut-of-a-healthy-indian-adult
#2
Satyabrata Bag, Tarini Shankar Ghosh, Bhabatosh Das
Faecalibacterium prausnitzii is the most abundant (~4%) member of the phylum Firmicutes found in the colon of healthy humans. It is a strict anaerobe and plays an important role in intestinal homeostasis. Here, we report the complete genome sequence of F. prausnitzii strain Indica.
November 16, 2017: Genome Announcements
https://www.readbyqxmd.com/read/29143816/quantitative-microbiome-profiling-links-gut-community-variation-to-microbial-load
#3
Doris Vandeputte, Gunter Kathagen, Kevin D'hoe, Sara Vieira-Silva, Mireia Valles-Colomer, João Sabino, Jun Wang, Raul Y Tito, Lindsey De Commer, Youssef Darzi, Séverine Vermeire, Gwen Falony, Jeroen Raes
Current sequencing-based analyses of faecal microbiota quantify microbial taxa and metabolic pathways as fractions of the sample sequence library generated by each analysis. Although these relative approaches permit detection of disease-associated microbiome variation, they are limited in their ability to reveal the interplay between microbiota and host health. Comparative analyses of relative microbiome data cannot provide information about the extent or directionality of changes in taxa abundance or metabolic potential...
November 15, 2017: Nature
https://www.readbyqxmd.com/read/29142271/structural-and-functional-differences-in-gut-microbiome-composition-in-patients-undergoing-haemodialysis-or-peritoneal-dialysis
#4
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/29142244/body-size-phenotypes-comprehensively-assess-cardiometabolic-risk-and-refine-the-association-between-obesity-and-gut-microbiota
#5
J de la Cuesta-Zuluaga, V Corrales-Agudelo, J A Carmona, J M Abad, J S Escobar
BACKGROUND: The gut microbiota associates with obesity and related disorders, but recent meta-analyses have found that this association is, at best, of small effect. We argue that such analyses are flawed by the use of BMI as sole proxy for disease, and explore a classification method that distinguishes the cardiometabolic health status of individuals to look for more comprehensive associations between gut microbes and health. METHODS: We analyzed a 441 community-dwelling cohort on which we obtained demographic and health information, anthropometry and blood biochemistry data that served to categorize participants according to BMI, cardiometabolic health status and body size phenotypes...
November 16, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29141471/dietary-chlorogenic-acid-regulates-gut-microbiota-serum-free-amino-acids-and-colonic-serotonin-levels-in-growing-pigs
#6
Yi Wu, Wenhui Liu, Qi Li, Yafei Li, Yali Yan, Fang Huang, Xin Wu, Quancheng Zhou, Xugang Shu, Zheng Ruan
Chlorogenic acid (CGA) has many biological properties, including antibacterial, antioxidant and anti-inflammatory properties, and is one of the most abundant phenolic acids available in the human diet. The aim of this study was to investigate the effects of CGA on regulation of the gut microbiota, and on the levels of free amino acids and 5-hydroxytryptamine (5-HT, serotonin). Ninety-six healthy growing pigs were randomly assigned to two treatment groups: the Ctrl group (control group, standard feed) and the CGA group [standard feed plus 0...
November 15, 2017: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/29138359/comparative-effects-of-intraduodenal-amino-acid-infusions-on-food-intake-and-gut-hormone-release-in-healthy-males
#7
Robert E Steinert, Sina S Ullrich, Nori Geary, Lori Asarian, Marco Bueter, Michael Horowitz, Christine Feinle-Bisset
In contrast to the many studies of the effects of individual amino acids (AAs) on eating, no studies have compared the effects of different AAs on eating and underlying preabsorptive gastrointestinal mechanisms. To compare the effects of intraduodenal infusions of l-tryptophan (TRP), l-leucine (LEU), l-phenylalanine (PHE) and l-glutamine (GLN) on appetite, gastrointestinal hormone responses (including ghrelin, cholecystokinin (CCK), peptide YY (PYY) and glucagon-like peptide-1 [GLP-1]), glycemia (glucagon, insulin and glucose) and test meal size in healthy males, we retrospectively analyzed data from four published independent, randomized, double-blind, placebo-controlled studies of 90-min intraduodenal infusions of the individual AAs...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29137150/in-vitro-fermentation-patterns-of-rice-bran-components-by-human-gut-microbiota
#8
Tung Pham, Keat Thomas Teoh, Brett J Savary, Ming-Hsuan Chen, Anna McClung, Sun-Ok Lee
Whole grain rice is a rich source of fiber, nutrients, and phytochemicals that may promote gastrointestinal health, but such beneficial components are typically removed with the bran during polishing. Soluble feruloylated arabinoxylan oligosaccharides (FAXO) and polyphenols (RBPP) isolated from rice bran are hypothesized to have positive impacts on human gut microbiota through a prebiotic function. Using an in vitro human fecal fermentation bioassay, FAXO and RBPP treatments were assessed for short-chain fatty acids (SCFA) production patterns and by evaluating their impacts on the phylogentic composition of human gut microbiota by 16S rRNA gene sequencing...
November 12, 2017: Nutrients
https://www.readbyqxmd.com/read/29136633/impaired-enterohormone-response-following-a-liquid-test-meal-in-gastrectomized-patients
#9
Lidia Santarpia, Maria Carmen Pagano, Iolanda Cioffi, Lucia Alfonsi, Rosario Cuomo, Giuseppe Labruna, Lucia Sacchetti, Franco Contaldo, Fabrizio Pasanisi
BACKGROUND: Total gastrectomy (TG) is responsible for symptoms or disturbance of alimentary status (changes in body weight, food intake per meal and frequency of meal per day) which, in turn are responsible for weight loss and malnutrition. The study evaluates the gut hormone responses in totally gastrectomized (TG) patients after a liquid meal test. METHODS: Twenty total gastrectomized cancer-free patients (12 M, 8 F, 56.4 ± 10.2 years, BMI 21.4 ± 2.2 kg/m2) and 10 healthy volunteers (4 M, 6 F, 48...
November 14, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/29134744/acute-oral-sodium-propionate-supplementation-raises-resting-energy-expenditure-and-lipid-oxidation-in-fasted-humans
#10
Edward S Chambers, Claire S Byrne, Karen Aspey, Yanjie Chen, Saadiyah Khan, Douglas J Morrison, Gary Frost
Short chain fatty acids (SCFAs), produced from fermentation of dietary fibre by the gut microbiota, have been suggested to modulate energy metabolism. Previous work using rodent models have demonstrated that oral supplementation of the SCFA propionate raises resting energy expenditure (REE) by promoting lipid oxidation. The objective of this study was to investigate the effects of oral sodium propionate on REE and substrate metabolism in humans. Eighteen healthy volunteers (9 females and 9 males; Age: 25±1 y; Body Mass Index: 24...
November 13, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29130800/the-role-of-the-microbiome-in-childhood-asthma
#11
Giovanna Pisi, Valentina Fainardi, Marina Aiello, Giuseppina Bertorelli, Ernesto Crisafulli, Alfredo Chetta
It is now well established that the healthy bronchial tree contains a microbiome distinct from that of the upper respiratory tract and that the lung microbiome may be dysregulated in individuals with a chronic respiratory disease, such as asthma. In addition, after birth, gut microbes interact with the host tissue, especially with the lymphatic tissue, thereby guaranteeing efficient immune activation. This review focuses on the available literature on the relationships between the gut microbiome, immune function and asthma in childhood, as well as the therapeutic strategies aimed at acting on the modulation of the microbiome...
November 2017: Immunotherapy
https://www.readbyqxmd.com/read/29130220/-current-research-progress-and-thinking-of-fecal-microbiota-transplantation-for-the-treatment-of-gastrointestinal-disorders
#12
Ning Li, Hongliang Tian
Fecal microbiota transplantation (FMT), also known as fecal bacteriotherapy or fecal infusion, consists of injection of a liquid filtrate of feces from a healthy donor into the gastrointestinal tract of a recipient individual. FMT has been proposed as a therapeutic approach for functional diseases of the gastrointestinal tract by reestablishment of a wide diversity of intestinal flora. Clostridium difficile infection (CDI) treatment guideline from American Gastroenterology Association (AGA) recommends that FMT can be used as the treatment protocols of relapse CDI...
October 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/29129229/head-injury-profoundly-affects-gut-microbiota-homeostasis-results-of-a-pilot-study
#13
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/29126851/ccr6-signaling-inhibits-suppressor-function-of-induced-treg-during-gut-inflammation
#14
Neeraja Kulkarni, Heikrujam Thoihen Meitei, Sandip Ashok Sonar, Praveen Kumar Sharma, Vikkarasan Rehman Mujeeb, Sharad Srivastava, Ramanamurthy Boppana, Girdhari Lal
CCR6 is a G protein-coupled receptor (GPCR) that binds to a specific chemokine, CCL20. The role of CCR6-CCL20 is very well studied in the migration of immune cells, but the non-chemotaxis functions of CCR6 signaling were not known. Here, we show that during gut inflammation, the frequency of Foxp3(+)CD4(+) T cells (Tregs) reduced in the secondary lymphoid tissues and CCR6(+) Tregs enhanced the expression of RORγt. The peripheral blood mononuclear cells (PBMCs) of ulcerative colitis (UC) patients showed lower percentages of Foxp3(+)CD4(+) T cells, as compared to healthy individuals, with CCR6(+) Tregs showing higher RORγt expression as compared to CCR6(-)Tregs...
November 7, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/29124968/probiotic-bacteria-cell-walls-stimulate-the-activity-of-the-intestinal-epithelial-cells-and-macrophage-functionality
#15
J M Lemme-Dumit, M A Polti, G Perdigón, C Maldonado Galdeano
The effect of oral administration of probiotic bacteria cell walls (PBCWs) in the stimulation of the immune system in healthy BALB/c mice was evaluated. We focused our investigation mainly on intestinal epithelial cells (IECs) which are essential for coordinating an adequate mucosal immune response and on the functionality of macrophages. The probiotic bacteria and their cell walls were able to stimulate the IECs exhibiting an important activation and cytokine releases. Supplementation with PBCWs promoted macrophage activation from peritoneum and spleen, indicating that the PBCWs oral administration was able to improve the functionality of the macrophages...
November 10, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/29124388/measuring-the-impact-of-olive-pomace-enriched-biscuits-on-the-gut-microbiota-and-its-metabolic-activity-in-mildly-hypercholesterolaemic-subjects
#16
Lorenza Conterno, Francesca Martinelli, Matteo Tamburini, Francesca Fava, Andrea Mancini, Maddalena Sordo, Massimo Pindo, Stefan Martens, Domenico Masuero, Urska Vrhovsek, Claudia Dal Lago, Gabriele Ferrario, Mario Morandini, Kieran Tuohy
PURPOSE: Olive pomace is a major waste product of olive oil production but remains rich in polyphenols and fibres. We measured the potential of an olive pomace-enriched biscuit formulation delivering 17.1 ± 4.01 mg/100 g of hydroxytyrosol and its derivatives, to modulate the composition and metabolic activity of the human gut microbiota. METHODS: In a double-blind, controlled parallel dietary intervention 62 otherwise healthy hypercholesterolemic (total plasma cholesterol 180-240 mg/dl) subjects were randomly assigned to eat 90 g of olive pomace-enriched biscuit (olive-enriched product, OEP) or an isoenergetic control (CTRL) for 8 weeks...
November 9, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/29124056/microbial-therapeutics-designed-for-infant-health
#17
REVIEW
Claire Watkins, Catherine Stanton, C Anthony Ryan, R Paul Ross
Acknowledgment of the gut microbiome as a vital asset to health has led to multiple studies attempting to elucidate its mechanisms of action. During the first year of life, many factors can cause fluctuation in the developing gut microbiome. Host genetics, maternal health status, mode of delivery, gestational age, feeding regime, and perinatal antibiotic usage, are known factors which can influence the development of the infant gut microbiome. Thus, the microbiome of vaginally born, exclusively breastfed infants at term, with no previous exposure to antibiotics, either directly or indirectly from the mother, is to be considered the "gold standard...
2017: Frontiers in Nutrition
https://www.readbyqxmd.com/read/29124041/alteration-of-gut-microbiota-and-inflammatory-cytokine-chemokine-profiles-in-5-fluorouracil-induced-intestinal-mucositis
#18
Hong-Li Li, Lan Lu, Xiao-Shuang Wang, Li-Yue Qin, Ping Wang, Shui-Ping Qiu, Hui Wu, Fei Huang, Bei-Bei Zhang, Hai-Lian Shi, Xiao-Jun Wu
Disturbed homeostasis of gut microbiota has been suggested to be closely associated with 5-fluorouracil (5-Fu) induced mucositis. However, current knowledge of the overall profiles of 5-Fu-disturbed gut microbiota is limited, and so far there is no direct convincing evidence proving the causality between 5-Fu-disturbed microbiota and colonic mucositis. In mice, in agreement with previous reports, 5-Fu resulted in severe colonic mucositis indicated by weight loss, diarrhea, bloody stool, shortened colon, and infiltration of inflammatory cells...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29122905/healthy-donor-faecal-transplant-for-corticosteroid-non-responsive-severe-alcoholic-hepatitis
#19
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/29120399/a-microbiomic-analysis-in-african-americans-with-colonic-lesions-reveals-streptococcus-sp-vt162-as-a-marker-of-neoplastic-transformation
#20
Hassan Brim, Shibu Yooseph, Edward Lee, Zaki Sherif, Muneer Abbas, Adeyinka O Laiyemo, Sudhir Varma, Manolito Torralba, Scot E Dowd, Karen E Nelson, Wimal Pathmasiri, Susan Sumner, Willem de Vos, Qiaoyi Liang, Jun Yu, Erwin Zoetendal, Hassan Ashktorab
Increasing evidence suggests a role of the gut microbiota in colorectal carcinogenesis (CRC). To detect bacterial markers of colorectal cancer in African Americans a metabolomic analysis was performed on fecal water extracts. DNA from stool samples of adenoma and healthy subjects and from colon cancer and matched normal tissues was analyzed to determine the microbiota composition (using 16S rDNA) and genomic content (metagenomics). Metagenomic functions with discriminative power between healthy and neoplastic specimens were established...
November 9, 2017: Genes
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