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https://www.readbyqxmd.com/read/29040820/systematic-review-of-the-effect-of-enteral-feeding-on-gut-microbiota-in-preterm-infants
#1
Wanli Xu, Michelle Judge, Kendra Maas, Naveed Hussain, Jacqueline M McGrath, Wendy A Henderson, Xiaomei Cong
OBJECTIVE: To examine the effect of feeding type on microbial patterns among preterm infants and to identify feeding factors that promote the colonization of beneficial bacteria. DATA SOURCES: PubMed, Cochrane Database of Systematic Reviews, Scopus, and the Cummulative Index of Nursing and Allied Health Literature were thoroughly searched for articles published between January 2000 and January 2017, using the keywords gut microbiome, gut microbiota, enteral microbiome, enteral microbiota, premature infant, preterm infant, extremely low birth weight infant, ELBW infant, very low birth weight infant, feeding, breast milk, breastfeeding, formula, prebiotic, probiotic, and long chain polyunsaturated fatty acid...
October 14, 2017: Journal of Obstetric, Gynecologic, and Neonatal Nursing: JOGNN
https://www.readbyqxmd.com/read/29034330/perinatal-bisphenol-a-exposure-induces-chronic-inflammation-in-rabbit-offspring-via-modulation-of-gut-bacteria-and-their-metabolites
#2
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/29034109/multidrug-resistant-pseudomonas-aeruginosa-induce-systemic-pro-inflammatory-immune-responses-in-colonized-mice
#3
Eliane von Klitzing, Stefan Bereswill, Markus M Heimesaat
The World Health Organization has rated multidrug-resistant (MDR) Pseudomonas aeruginosa as a critical threat to human health. In the present study, we performed a survey of intestinal colonization, and local and systemic immune responses following peroral association of secondary abiotic mice with either a clinical MDR P. aeruginosa or a commensal murine Escherichia coli isolate. Depletion of the intestinal microbiota following antibiotic treatment facilitated stable intestinal colonization of both P. aeruginosa and E...
September 2017: European Journal of Microbiology & Immunology
https://www.readbyqxmd.com/read/29033923/emerging-trends-in-smart-probiotics-functional-consideration-for-the-development-of-novel-health-and-industrial-applications
#4
REVIEW
Racha El Hage, Emma Hernandez-Sanabria, Tom Van de Wiele
The link between gut microbiota and human health is well-recognized and described. This ultimate impact on the host has contributed to explain the mutual dependence between humans and their gut bacteria. Gut microbiota can be manipulated through passive or active strategies. The former includes diet, lifestyle, and environment, while the latter comprise antibiotics, pre- and probiotics. Historically, conventional probiotic strategies included a phylogenetically limited diversity of bacteria and some yeast strains...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29033907/high-salt-diet-has-a-certain-impact-on-protein-digestion-and-gut-microbiota-a-sequencing-and-proteome-combined-study
#5
Chao Wang, Zixin Huang, Kequan Yu, Ruiling Ding, Keping Ye, Chen Dai, Xinglian Xu, Guanghong Zhou, Chunbao Li
High-salt diet has been considered to cause health problems, but it is still less known how high-salt diet affects gut microbiota, protein digestion, and passage in the digestive tract. In this study, C57BL/6J mice were fed low- or high-salt diets (0.25 vs. 3.15% NaCl) for 8 weeks, and then gut contents and feces were collected. Fecal microbiota was identified by sequencing the V4 region of 16S ribosomal RNA gene. Proteins and digested products of duodenal, jejunal, cecal, and colonic contents were identified by LC-MS-MS...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29033903/protective-effect-of-akkermansia-muciniphila-against-immune-mediated-liver-injury-in-a-mouse-model
#6
Wenrui Wu, Longxian Lv, Ding Shi, Jianzhong Ye, Daiqiong Fang, Feifei Guo, Yating Li, Xingkang He, Lanjuan Li
Accumulating evidence indicates that gut microbiota participates in the pathogenesis and progression of liver diseases. The severity of immune-mediated liver injury is associated with different microbial communities. Akkermansia muciniphila can regulate immunologic and metabolic functions. However, little is known about its effects on gut microbiota structure and function. This study investigated the effect of A. muciniphila on immune-mediated liver injury and potential underlying mechanisms. Twenty-two C57BL/6 mice were assigned to three groups (N = 7-8 per group) and continuously administrated A...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29031501/dna-methylation-and-transcription-patterns-in-intestinal-epithelial-cells-from-pediatric-patients-with-inflammatory-bowel-diseases-differentiate-disease-subtypes-and-associate-with-outcome
#7
K J Howell, J Kraiczy, K M Nayak, M Gasparetto, A Ross, C Lee, T N Mak, B-K Koo, N Kumar, T Lawley, A Sinha, P Rosenstiel, R Heuschkel, O Stegle, M Zilbauer
BACKGROUND & AIMS: We analyzed DNA methylation patterns and transcriptomes of primary intestinal epithelial cells (IEC) of children newly diagnosed with inflammatory bowel diseases (IBD) to learn more about pathogenesis. METHODS: We obtained mucosal biopsies (n=236) collected from terminal ileum and ascending and sigmoid colons of children (median age=13) newly diagnosed with IBD (43 with Crohn's disease [CD], 23 with ulcerative colitis [UC]), and 30 children without IBD (controls)...
October 11, 2017: Gastroenterology
https://www.readbyqxmd.com/read/29031238/the-effect-of-supragingival-biofilm-re-development-on-the-subgingival-microbiota-in-chronic-periodontitis
#8
Fátima Aparecida Rocha Resende Hartenbach, Carina Maciel Silva-Boghossian, Ana Paula Vieira Colombo
OBJECTIVE: In this study, we hypothesized that in the absence of oral hygiene, re-growth of the climax microbial communities of supra and subgingival biofilm happens in a faster and more intense fashion in individuals with chronic periodontitis (CP) compared to periodontally healthy controls (PH). DESIGN: Thirty patients (PH=15 and CP=15) received professional supragingival prophylaxis, and were asked to refrain from oral hygiene for 7days. Supra and subgingival biofilm samples and GCF were collected from randomly selected quadrants at baseline (before prophylaxis), immediately after prophylaxis, 2h, 6h, 24h, and 7days after prophylaxis...
October 10, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29030987/nod1-downregulates-intestinal-serotonin-transporter-and-interacts-with-other-pattern-recognition-receptors
#9
Elena Layunta, Eva Latorre, Raquel Forcén, Laura Grasa, Miguel Ángel Plaza, Maykel Arias, Ana I Alcalde, José E Mesonero
Serotonin (5-HT) is an essential gastrointestinal modulator whose effects regulate the intestinal physiology. 5-HT effects depend on extracellular 5-HT bioavailability, which is controlled by the serotonin transporter (SERT) expressed in both the apical and basolateral membranes of enterocytes. SERT is a critical target for regulating 5-HT levels and consequently, modulating the intestinal physiology. The deregulation of innate immune receptors has been extensively studied in inflammatory bowel diseases (IBD), where an exacerbated defense response to commensal microbiota is observed...
October 14, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29029763/serotype-virulence-profile-antimicrobial-resistance-and-macrolide-resistance-determinants-in-streptococcus-agalactiae-isolates-in-pregnant-women-and-neonates-in-catalonia-spain
#10
Yuly López, Elena Parra, Virginio Cepas, Isabel Sanfeliú, Teresa Juncosa, Antonia Andreu, Mariona Xercavins, Josefa Pérez, Sergi Sanz, Andrea Vergara, Jordi Bosch, Sara Maria Soto
INTRODUCTION: Streptococcus agalactiae, or group B streptococci (GBS), is the main aetiological agent of early neonatal sepsis in developed countries. This microorganism belongs to the gastrointestinal tract microbiota wherefrom it can colonize the vagina and be vertically transmitted to the child either before or at birth, and subsequently cause infection in the newborn. Approximately, 50% of newborns born to women with GBS become colonized, with 1-2% developing early neonatal infection if no preventive intervention is performed...
October 10, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/29029398/dietary-zno-nanoparticles-alters-intestinal-microbiota-and-inflammation-response-in-weaned-piglets
#11
Tian Xia, Wenqing Lai, Miaomiao Han, Meng Han, Xi Ma, Liying Zhang
The present study was carried out to determine whether low dose of zinc oxide nanoparticles (Nano-ZnO) could serve as a potential substitute of pharmacological dose of traditional ZnO in weaned piglets. 180 crossbred weaning piglets were randomly assigned to 3 treatments. Experimental animals were fed basal diet supplemented with 0 mg Zn/kg (Control), 600 mg Zn/kg (Nano-ZnO) and 2000 mg Zn/kg (ZnO) for 14 days. On day 14 after weaning, the piglets fed Nano-ZnO did not differ from those fed traditional ZnO in growth performance and jejunal morphology, while Nano-ZnO treatment could significantly alleviate the incidence of diarrhea (P < 0...
September 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29029078/prebiotic-potential-of-pectin-and-pectic-oligosaccharides-to-promote-anti-inflammatory-commensal-bacteria-in-the-human-colon
#12
Wing Sun Faith Chung, Marjolein Meijerink, Birgitte Zeuner, Jesper Holck, Petra Louis, Anne Meyer, Jerry M Wells, Harry J Flint, Sylvia H Duncan
Dietary plant cell wall carbohydrates are important in modulating the composition and metabolism of the complex gut microbiota, which can impact on health. Pectin is a major component of plant cell walls. Based on studies in model systems and available bacterial isolates and genomes, the capacity to utilize pectins for growth is widespread among colonic Bacteroidetes but relatively uncommon among Firmicutes. One Firmicutes species promoted by pectin is Eubacterium eligens. E. eligens DSM3376 utilizes apple pectin and encodes a broad repertoire of pectinolytic enzymes, including a highly abundant pectate lyase of around 200 kDa that is expressed constitutively...
October 3, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/29028844/a-polyphenol-enriched-diet-and-ascaris-suum-infection-modulate-mucosal-immune-responses-and-gut-microbiota-composition-in-pigs
#13
Andrew R Williams, Lukasz Krych, Hajar Fauzan Ahmad, Peter Nejsum, Kerstin Skovgaard, Dennis S Nielsen, Stig M Thamsborg
Polyphenols are a class of bioactive plant secondary metabolites that are thought to have beneficial effects on gut health, such as modulation of mucosal immune and inflammatory responses and regulation of parasite burdens. Here, we examined the interactions between a polyphenol-rich diet supplement and infection with the enteric nematode Ascaris suum in pigs. Pigs were fed either a basal diet or the same diet supplemented with grape pomace (GP), an industrial by-product rich in polyphenols such as oligomeric proanthocyanidins...
2017: PloS One
https://www.readbyqxmd.com/read/29028424/unique-tailoring-of-th17-at-the-gingival-oral-mucosal-barrier
#14
J E Konkel, N M Moutsopoulos
Our recent work highlights unique requirements for the induction of Th17 cells at the oral/gingival mucosal barrier. Unlike other barrier sites, such as the skin and gastrointestinal tract, we found that Th17 cells can develop at the gingiva independently of commensal microbiota colonization. Instead, we identified that damage, which occurs physiologically due to mastication, promotes induction of Th17 cells and tones homeostatic immunity at the gingiva.
October 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29025731/macrophage-depletion-using-clodronate-liposomes-decreases-tumorigenesis-and-alters-gut-microbiota-in-the-aom-dss-mouse-model-of-colon-cancer
#15
Jackie E Bader, Reilly T Enos, Kandy T Velazquez, Meredith S Carson, Mitzi Nagarkatti, Prakash S Nagarkatti, Ioulia Chatzistamou, J Mark Davis, James A Carson, Cory Robinson, E Angela Murphy
We examined the role of macrophages in inflammation associated colorectal cancer (CRC). Given the emerging evidence on immune-microbiota interactions in CRC, we also sought to examine the interaction between macrophages and gut microbiota. To induce CRC, male C57BL/6 mice (n=32) received a single injection of azoxymethane (AOM) followed by three cycles of dextran sodium sulfate (DSS) supplemented water at weeks 1, 4, and 7, respectively. Prior to the final DSS cycle (week 7) and twice weekly until sacrifice, mice (n=16/group) received either 200μl i...
October 12, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/29024803/graft-derived-reconstitution-of-mucosal-associated-invariant-t-cells-after-allogeneic-hematopoietic-cell-transplantation
#16
Abir Bhattacharyya, Laïla-Aïcha Hanafi, Alyssa Sheih, Jonathan L Golob, Sujatha Srinivasan, Michael J Boeckh, Steven A Pergam, Sajid Mahmood, Kelsey K Baker, Ted A Gooley, Filippo Milano, David N Fredricks, Stanley R Riddell, Cameron J Turtle
Mucosal-associated invariant T (MAIT) cells express a semi-invariant Vα7.2(+) T cell receptor (TCR) that recognizes ligands from distinct bacterial and fungal species. In neonates, MAIT cells proliferate coincident with gastrointestinal (GI) bacterial colonization. In contrast, under non-inflammatory conditions adult MAIT cells remain quiescent due to acquired regulation of TCR signaling. Effects of inflammation and the altered GI microbiota after allogeneic hematopoietic cell transplantation (HCT) on MAIT cell reconstitution have not been described...
October 9, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29023984/partial-to-complete-abrogation-of-the-sub-epithelial-macrophage-barrier-against-the-gut-microbiota-in-patients-with-ulcerative-colitis-and-crohn-s-colitis
#17
Carlos A Rubio, Cord Langner, Peter T Schmidt
AIMS: The integrity of the subepithelial band of indigenous macrophages in the lamina-propria (SLP-MΦ) is crucial in deterring the commensal gut-microbiota from host-assailment. The breakdown of the SLP-MΦ barrier results in microbiota inflow and improper immune responses; this might lead to IBD. During inflammation, the SLP-MΦ-barrier is reinforced by inflammation-elicited MΦ (IEMΦ, derived from blood-circulating monocytes). The aim was to explore the characteristics of the SLP-MΦ band in a cohort of biopsies without inflammation, in patients with ulcerative colitis-in remission (UCre), and in patients with right-sided Crohn's colitis (RCC)...
October 11, 2017: Histopathology
https://www.readbyqxmd.com/read/29023448/structural-host-microbiota-interaction-networks
#18
REVIEW
Emine Guven-Maiorov, Chung-Jung Tsai, Ruth Nussinov
Hundreds of different species colonize multicellular organisms making them "metaorganisms". A growing body of data supports the role of microbiota in health and in disease. Grasping the principles of host-microbiota interactions (HMIs) at the molecular level is important since it may provide insights into the mechanisms of infections. The crosstalk between the host and the microbiota may help resolve puzzling questions such as how a microorganism can contribute to both health and disease. Integrated superorganism networks that consider host and microbiota as a whole-may uncover their code, clarifying perhaps the most fundamental question: how they modulate immune surveillance...
October 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/29022834/phenolic-protein-interactions-effects-on-food-properties-and-health-benefits
#19
Nydia E Buitimea-Cantúa, Janet A Gutiérrez-Uribe, Sergio O Serna-Saldívar
Phenolic-protein interactions (PPI), which naturally occur in most food systems, are being intentionally designed to enhance functional performance of phenolic compounds (PC). PPI have been primarily associated with changes related to sensorial, nutritional, and nutraceutical features of foods. Furthermore, these interactions affect properties such as astringency, protein digestibility, absorption, and bioavailability of antioxidants. Therefore, new product development should pay attention to these interactions and not only on the concentration of PC...
October 12, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/29022389/the-composition-and-metabolism-of-faecal-microbiota-is-specifically-modulated-by-different-dietary-polysaccharides-and-mucin-an-isothermal-microcalorimetry-study
#20
K Adamberg, K Kolk, M Jaagura, R Vilu, S Adamberg
The metabolic activity of colon microbiota is specifically affected by fibres with various monomer compositions, degree of polymerisation and branching. The supply of a variety of dietary fibres assures the diversity of gut microbial communities considered important for the well-being of the host. The aim of this study was to compare the impact of different oligo- and polysaccharides (galacto- and fructooligosaccharides, resistant starch, levan, inulin, arabinogalactan, xylan, pectin and chitin), and a glycoprotein mucin on the growth and metabolism of faecal microbiota in vitro by using isothermal microcalorimetry (IMC)...
October 12, 2017: Beneficial Microbes
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