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Intestinal gut microbiota

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https://www.readbyqxmd.com/read/29775902/type-1-diabetes-through-the-lens-of-human-genome-and-metagenome-interplay
#1
REVIEW
Sepideh Zununi Vahed, Hakimeh Moghaddas Sani, Yalda Rahbar Saadat, Abolfazl Barzegari, Yadollah Omidi
Diabetes is a genetic- and epigenetic-related disease from which a large population worldwide suffers. Some genetic factors along with various mutations related to the immune system for disease mechanism(s) have contrastively been determined. However, sometimes mechanisms have not been fully managed for the clarification of the initiation and/or progression of diseases to help patients. In the recent years, due to familiarity with the role of gut microbiota in the health, it has been found that the changes of the microbial balance in the industrialized societies can cause a battery of modern diseases, for which we have no specific definition of how they emerge...
May 15, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29772522/bariatric-surgery-drives-major-rearrangements-of-the-intestinal-microbiota-including-the-biofilm-composition
#2
Giuseppina Campisciano, Carolina Cason, Silvia Palmisano, Michela Giuricin, Alessia Rizzardi, Lory Saveria Croce, Nicolo De Manzini, Manola Comar
The intestinal microbiota disequilibrium has been associated with obesity, while the role of the gut mucosal biofilms in this pathology is still unknown. We analysed the changes in the intestinal microbiota of obese patients after bariatric surgery with the aim of disclosing the rearrangement of the biofilm configuration. Although the bariatric surgery drives major rearrangements of the gut microbiota, obese patients maintain the Prevotella enterotype before and after surgery, as shown by normal weight patients, with an increase of Bacteroides vulgatus and Bacteroides uniformis ...
June 1, 2018: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/29770393/consumption-of-pomegranate-decreases-plasma-lipopolysaccharide-binding-protein-levels-a-marker-of-metabolic-endotoxemia-in-patients-with-newly-diagnosed-colorectal-cancer-a-randomized-controlled-clinical-trial
#3
A González-Sarrías, M A Núñez-Sánchez, M A Ávila-Gálvez, T Monedero-Saiz, F J Rodríguez-Gil, Francisco Martínez-Díaz, M V Selma, J C Espín
Gut microbiota dysbiosis alters the intestinal barrier function, increases plasma lipopolysaccharide (LPS) levels, which promotes endotoxemia, and contributes to the onset and development of colorectal cancer (CRC). We report here for the first time the reduction of plasma LPS-binding protein (LBP) levels, a marker of endotoxemia, after pomegranate consumption in newly diagnosed CRC patients.
May 17, 2018: Food & Function
https://www.readbyqxmd.com/read/29770190/effects-of-molecular-hydrogen-dissolved-alkaline-electrolyzed-water-on-intestinal-environment-in-mice
#4
Yasuki Higashimura, Yasunori Baba, Ryo Inoue, Tomohisa Takagi, Kazuhiko Uchiyama, Katsura Mizushima, Yasuko Hirai, Chihiro Ushiroda, Yoshinori Tanaka, Yuji Naito
Increasing evidence indicates that molecular hydrogen-dissolved alkaline electrolyzed water (AEW) has various physiological activities such as antioxidative activity. Gut microbiota are deeply associated with our health through a symbiotic relationship. Recent reports have described that most gastrointestinal microbial species encode the genetic capacity to metabolize molecular hydrogen, meaning that molecular hydrogen might affect the gut microbial composition. Nevertheless, AEW effects on gut microbiota remain unknown...
January 2018: Medical Gas Research
https://www.readbyqxmd.com/read/29769378/food-starch-structure-impacts-gut-microbiome-composition
#5
Frederick J Warren, Naoki M Fukuma, Deirdre Mikkelsen, Bernadine M Flanagan, Barbara A Williams, Allan T Lisle, Páraic Ó Cuív, Mark Morrison, Michael J Gidley
Starch is a major source of energy in the human diet and is consumed in diverse forms. Resistant starch (RS) escapes small intestinal digestion and is fermented in the colon by the resident microbiota, with beneficial impacts on colonic function and host health, but the impacts of the micro- and nanoscale structure of different physical forms of food starch on the broader microbial community have not been described previously. Here, we use a porcine in vitro fermentation model to establish that starch structure dramatically impacts microbiome composition, including the key amylolytic species, and markedly alters both digestion kinetics and fermentation outcomes...
June 27, 2018: MSphere
https://www.readbyqxmd.com/read/29769268/pbdes-altered-gut-microbiome-and-bile-acid-homeostasis-in-male-c57bl-6-mice
#6
Cindy Yanfei Li, Joseph L Dempsey, Dongfang Wang, SooWan Lee, Kris M Weigel, Qiang Fei, Deepak Kumar Bhatt, Bhagwat Prasad, Daniel Raftery, Haiwei Gu, Julia Yue Cui
Polybrominated diphenyl ethers (PBDEs) are persistent environmental contaminants with well-characterized toxicities in host organs. Gut microbiome is increasingly recognized as an important regulator of xenobiotic biotransformation; however, little is known about its interactions with PBDEs. Primary bile acids (BAs) are metabolized by the gut microbiome into more lipophilic secondary BAs that may be absorbed and interact with certain host receptors. The goal of this study was to test our hypothesis that PBDEs cause dysbiosis and aberrant regulation of BA homeostasis...
May 16, 2018: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/29767145/an-increase-in-corn-resistant-starch-decreases-protein-fermentation-and-modulates-gut-microbiota-during-in-vitro-cultivation-of-pig-large-intestinal-inocula
#7
Xiangyu He, Weiwei Sun, Ting Ge, Chunlong Mu, Weiyun Zhu
High-protein diet could cause an increase in protein fermentation in the large intestine, leading to an increased production of potentially detrimental metabolites. We hypothesized that an increase in corn resistant starch content may attenuate the protein fermentation. The aim of this study was to evaluate the effect of resistant starch on protein fermentation by inocula from large intestine of pigs using in vitro cultivation. Fermentation patterns were analyzed during a 24-h incubation of cecal and colonic digesta with varying corn resistant starch contents, using casein protein as sole nitrogen source...
September 2017: Animal nutrition
https://www.readbyqxmd.com/read/29766722/effects-of-whole-grain-rice-and-wheat-on-composition-of-gut-microbiota-and-short-chain-fatty-acids-in-rats
#8
Fei Han, Yong Wang, Yangyang Han, Jianxin Zhao, Fenli Han, Ge Song, Ping Jiang, Haijiang Miao
Diets rich in whole grain (WG) cereals bring lower disease risks compared with refined grain-based diets. We investigated the effects of polished rice (PR), refined wheat (RW), unpolished rice (UPR), and whole wheat (WW) on short-chain fatty acids (SCFAs) and gut microbiota in ileal, cecal, and colonic digesta of normal rats. Animals fed with UPR and WW diets exhibited higher total SCFA in cecal and colonic digesta compared with those fed with PR and RW diets. Wheat diets contributed higher total SCFA than rice diets...
May 16, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29766049/interleukin-1%C3%AE-deficient-mice-have-an-altered-gut-microbiota-leading-to-protection-from-dextran-sodium-sulfate-induced-colitis
#9
Moran Nunberg, Nir Werbner, Hadar Neuman, Marina Bersudsky, Alex Braiman, Moshe Ben-Shoshan, Meirav Ben Izhak, Yoram Louzoun, Ron N Apte, Elena Voronov, Omry Koren
Inflammatory bowel diseases (IBD) are a group of chronic inflammatory disorders of the intestine, with as-yet-unclear etiologies, affecting over a million people in the United States alone. With the emergence of microbiome research, numerous studies have shown a connection between shifts in the gut microbiota composition (dysbiosis) and patterns of IBD development. In a previous study, we showed that interleukin 1α (IL-1α) deficiency in IL-1α knockout (KO) mice results in moderate dextran sodium sulfate (DSS)-induced colitis compared to that of wild-type (WT) mice, characterized by reduced inflammation and complete healing, as shown by parameters of weight loss, disease activity index (DAI) score, histology, and cytokine expression...
May 2018: MSystems
https://www.readbyqxmd.com/read/29765359/comparing-microbiome-sampling-methods-in-a-wild-mammal-fecal-and-intestinal-samples-record-different-signals-of-host-ecology-evolution
#10
Melissa R Ingala, Nancy B Simmons, Claudia Wultsch, Konstantinos Krampis, Kelly A Speer, Susan L Perkins
The gut microbiome is a community of host-associated symbiotic microbes that fulfills multiple key roles in host metabolism, immune function, and tissue development. Given the ability of the microbiome to impact host fitness, there is increasing interest in studying the microbiome of wild animals to better understand these communities in the context of host ecology and evolution. Human microbiome research protocols are well established, but wildlife microbiome research is still a developing field. Currently, there is no standardized set of best practices guiding the collection of microbiome samples from wildlife...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29764197/re-thinking-the-chicken-campylobacter-jejuni-interaction-a-review
#11
Wageha A Awad, Claudia Hess, Michael Hess
Chickens are recognized as an imperative source of thermophilic Campylobacter spp., carrying this microorganism in high numbers in their intestinal tract. For long time, C. jejuni has been considered as a commensal microorganism which colonizes its primary host rather than infecting it, in the absence of any obvious clinical signs. However, recent studies question this and argue for a deeper understanding of the host-bacteria interaction. Following oral uptake it was demonstrated that C. jejuni interacts intimately with the gut epithelium and influences cellular functions of the host, with consequences on nutrient absorption...
May 15, 2018: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/29763437/postnatal-colonization-with-human-infant-type-bifidobacterium-species-alters-behavior-of-adult-gnotobiotic-mice
#12
Berkley Luk, Surabi Veeraragavan, Melinda Engevik, Miriam Balderas, Angela Major, Jessica Runge, Ruth Ann Luna, James Versalovic
Accumulating studies have defined a role for the intestinal microbiota in modulation of host behavior. Research using gnotobiotic mice emphasizes that early microbial colonization with a complex microbiota (conventionalization) can rescue some of the behavioral abnormalities observed in mice that grow to adulthood completely devoid of bacteria (germ-free mice). However, the human infant and adult microbiomes vary greatly, and effects of the neonatal microbiome on neurodevelopment are currently not well understood...
2018: PloS One
https://www.readbyqxmd.com/read/29762899/metagenomics-analysis-of-gut-microbiota-in-a-high-fat-diet-induced-obesity-mouse-model-fed-with-epigallocatechin-3-o-3-o-methyl-gallate-egcg3-me
#13
Xin Zhang, Yuhui Chen, Jieyu Zhu, Man Zhang, Chi-Tang Ho, Qingrong Huang, Jinxuan Cao
SCOPE: (-)-Epigallocatechin 3-O-(3-O-methyl) gallate (EGCG3''Me) has been shown to have a modulatory effect on human intestinal microbiota, and the relationship between intestinal flora and obesity has attracted more and more attention recently. Here, we investigated the potential link between EGCG3''Me and gut microbiota composition, as well as the underlying mechanisms of the anti-obesity activity of EGCG3''Me. METHODS AND RESULTS: EGCG3''Me was prepared from oolong tea by column chromatography, and the influence of EGCG3''Me on intestinal microbiota was analysed using a human flora-associated high fat diet (HFD)-induced obesity mouse model by metagenomics...
May 15, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29762726/supplementation-with-organic-acids-showing-different-effects-on-growth-performance-gut-morphology-and-microbiota-of-weaned-pigs-fed-with-highly-or-less-digestible-diets
#14
S Li, J Zheng, K Deng, L Chen, X L Zhao, X M Jiang, Z F Fang, L Q Che, S Y Xu, B Feng, J Li, Y Lin, Y Y Wu, Y M Han, De Wu
Two studies were conducted to evaluate the effects of organic acid (OA) supplementation in a highly digestible (Exp. 1) or a less digestible diet (Exp. 2) on the growth performance and intestinal health of weaned pigs. In Exp. 1, a total of 240 pigs weaned at day 21 were assigned to one of five dietary treatments: negative control (NC) (basal diet, 3,000 ppm ZnO in the first 2 weeks only); positive control (PC) (NC plus 10 mg/kg zinc bacitracin, 5 mg/kg colistin sulfate, and 5 mg/kg olaquindox); OA1 (NC plus a 0...
May 11, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29762384/microbial-metabolism-in-the-mammalian-gut-molecular-mechanisms-and-clinical-implications
#15
Anne Hall, James Versalovic
Human intestinal microbes participate actively at the interface of diet, nutrition, and overall health status. These biodiverse communities of microorganisms have a broader metabolic repertoire compared with their host, and they are able to synthesize and degrade substrates that would be otherwise unavailable. In recent years, we have recognized that healthy microbial communities are important for energy harvest and the regulation of body systems outside the digestive tract. Microbial dysbiosis, however, has been implicated in a number of human disorders, including obesity and inflammation...
June 2018: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/29762159/vitamin-d-in-inflammatory-bowel-disease-more-than-just-a-supplement
#16
John Gubatan, Alan C Moss
PURPOSE OF REVIEW: The aim of this review is to explore the protective role of vitamin D on the gastrointestinal tract, summarize the epidemiology of vitamin D deficiency in inflammatory bowel disease (IBD), and highlight recent studies examining the impact of low vitamin D and vitamin D supplementation on IBD clinical outcomes. RECENT FINDINGS: Vitamin D protects the gut barrier by regulating tight junction proteins and inhibiting intestinal apoptosis. Vitamin D enhances innate immunity by inducing antimicrobial peptides and regulates adaptive immunity by promoting anti-inflammatory T cells and cytokines...
May 11, 2018: Current Opinion in Gastroenterology
https://www.readbyqxmd.com/read/29761927/on-the-potential-role-of-intestinal-microbial-community-in-hepatocarcinogenesis-in-chronic-hepatitis-b
#17
REVIEW
Ashraf Mohamadkhani
The chronic infection of hepatitis B virus (HBV) is the most potent risk factor for the development of cirrhosis and hepatocellular carcinoma (HCC). The association of intestinal microbiota alteration with progressive liver disease has been investigated in recent studies. Overgrowth of potentially pathogenic bacteria of gram-negative species and, in particular, a significant increase in the fecal count of Escherichia coli (E. coli) are characterized in the presence of HCC. This study was conducted to describe the characteristics of the intestinal microbiota related to the presence of HCC in HBV-carrier patients...
May 15, 2018: Cancer Medicine
https://www.readbyqxmd.com/read/29760909/changes-in-intestinal-microbiota-across-an-altitudinal-gradient-in-the-lizard-phrynocephalus-vlangalii
#18
Wenya Zhang, Na Li, Xiaolong Tang, Naifa Liu, Wei Zhao
High altitude is an important driving force in animal evolution. However, the effect of altitude on gut microbial communities in reptiles has not been examined in detail. Here, we investigated the intestinal microbiota of three populations of the lizard Phrynocephalus vlangalii living at different altitudes using 16S rRNA gene sequencing. Bacteroidetes, Firmicutes, and Proteobacteria were the most abundant phyla. Bacteroides , Odoribacter , and Parabacteroides were the most abundant genera. Significant differences in the intestinal microbiota composition were found among the three populations from different altitudes...
May 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29760423/simultaneous-amelioratation-of-colitis-and-liver-injury-in-mice-by-bifidobacterium-longum-lc67-and-lactobacillus-plantarum-lc27
#19
Se-Eun Jang, Jin-Ju Jeong, Jeon-Kyung Kim, Myung Joo Han, Dong-Hyun Kim
Disturbances in the gut microbiota composition are associated with chronic inflammatory diseases of the intestine and the liver. In a preliminary study, Lactobacillus plantarum LC27 and Bifidobacterium longum LC67 could inhibit Escherichia coli growth and lipopolysaccharide-induced NF-κB activation linked to gut inflammation. Here, we investigated their effects on 2,4,6-trinitrobenzesulfonic acid (TNBS)-induced colitis and liver damage in mice. First, oral administration of LC27 or LC67 (1 × 109 CFU/mouse) inhibited TNBS-induced colon shortening [F(5,30) = 100...
May 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29760082/a-cytokine-network-involving-il-36%C3%AE-il-23-and-il-22-promotes-antimicrobial-defense-and-recovery-from-intestinal-barrier-damage
#20
Vu L Ngo, Hirohito Abo, Estera Maxim, Akihito Harusato, Duke Geem, Oscar Medina-Contreras, Didier Merlin, Andrew T Gewirtz, Asma Nusrat, Timothy L Denning
The gut epithelium acts to separate host immune cells from unrestricted interactions with the microbiota and other environmental stimuli. In response to epithelial damage or dysfunction, immune cells are activated to produce interleukin (IL)-22, which is involved in repair and protection of barrier surfaces. However, the specific pathways leading to IL-22 and associated antimicrobial peptide (AMP) production in response to intestinal tissue damage remain incompletely understood. Here, we define a critical IL-36/IL-23/IL-22 cytokine network that is instrumental for AMP production and host defense...
May 14, 2018: Proceedings of the National Academy of Sciences of the United States of America
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