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https://www.readbyqxmd.com/read/27912759/intestinal-dysbiosis-and-allogeneic-hematopoietic-progenitor-cell-transplantation
#1
REVIEW
Vikram M Raghunathan, Iris Sheng, Seah H Lim
The intestinal microbiota is a diverse and dynamic ecosystem that is increasingly understood to play a vital role in human health. Hematopoietic stem cell transplant recipients undergo prolonged exposure to antimicrobials, chemotherapeutic agents, and immunosuppressants, resulting in profound shifts in the gut microbiome. A growing body of research has revealed the ways in which these microbiologic shifts shape immune modulation, affecting susceptibility to infections and graft-versus-host disease, the two major post-transplant complications in this population...
December 3, 2016: Journal of Translational Medicine
https://www.readbyqxmd.com/read/27910987/on-the-formation-of-nitrogen-substituted-polycyclic-aromatic-hydrocarbons-npahs-in-circumstellar-and-interstellar-environments
#2
REVIEW
Dorian S N Parker, Ralf I Kaiser
The chemical evolution of extraterrestrial environments leads to the formation of polycyclic aromatic hydrocarbons (PAHs) via gas phase radical mediated aromatization reactions. We review that these de facto barrierless reactions are capable of forming prebiotic molecules such as nitrogen substituted PAHs (NPAHs), which represent the missing link between nitrogen bearing acyclic molecules and prebiotic nucleobases along with vitamins found in meteorites. Crucial routes leading to the incorporation of nitrogen atoms into the aromatic ring have been exposed...
December 2, 2016: Chemical Society Reviews
https://www.readbyqxmd.com/read/27910783/recent-advances-and-challenges-in-studies-of-control-of-cancer-stem-cells-and-the-gut-microbiome-by-the-trametes-derived-polysaccharopeptide-psp-review
#3
Joseph M Wu, Barbara B Doonan, Tze-Chen Hsieh, Qingyao Yang, Xiao-Tong Yang, Ming-Tat Ling
The medicinal mushroom Trametes versicolor has been well recognized for its activity in maintaining the general health of the population and in managing and treating human diseases in various cultures. Its use has been recently gaining acceptance and popularity in Western countries. The reported health benefits of T. versicolor led to a search for the identity of its bioactive ingredients. These efforts have resulted in the isolation of the polysaccharopeptide PSP from cultured mycelia of strain Cov-1, which expresses large amounts of PSP...
2016: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/27909795/altered-gut-microbiota-in-ra-implications-for-treatment
#4
Y Kang, Y Cai, X Zhang, X Kong, J Su
Rheumatoid arthritis (RA) is an autoimmune disease with progressive joint disorder. The complex interplay of genetic and environmental influences is important for the development of the disease. A growing body of evidence has shed light on the association of dysbiosis of gut microbiota with RA. Certain gut microbial strains have been shown to inhibit or attenuate immune responses in RA experimental models, suggesting that specific species among intestinal commensal bacteria may play either a pathogenic or a protective role in the development of RA...
December 1, 2016: Zeitschrift Für Rheumatologie
https://www.readbyqxmd.com/read/27909555/effect-of-dual-type-oligosaccharides-on-constipation-in-loperamide-treated-rats
#5
Sung Hee Han, Ki Bae Hong, Eun Young Kim, So Hyun Ahn, Hyung Joo Suh
BACKGROUND/OBJECTIVES: Constipation is a condition that can result from intestinal deformation. Because humans have an upright posture, the effects of gravity can cause this shape deformation. Oligosaccharides are common prebiotics and their effects on bowel health are well known. However, studies of the physiological functionality of a product that contains both lactulose and galactooligosaccharides are insufficient. We investigated the constipation reduction effect of a dual-type oligosaccharide, Dual-Oligo, in loperamide-treated rats...
December 2016: Nutrition Research and Practice
https://www.readbyqxmd.com/read/27904405/evaluation-of-prebiotic-effects-of-high-purity-galactooligosaccharides-in-vitro-and-in-vivo
#6
Ki Bae Hong, Jae Hwan Kim, Hyuk Kon Kwon, Sung Hee Han, Yooheon Park, Hyung Joo Suh
Galactooligosaccharides (GOS) are an important class of dietary prebiotics that exert beneficial effects on intestinal microbiota and gut barrier function. In this study, high-purity GOS (HP-GOS) were investigated in vitro and in vivo and confirmed as prebiotic ingredients in rat diet. HP-GOS were successfully produced using a two-step process, enzymatic hydrolysis and fermentation by yeast. They were found to serve as a good substrate and carbon source for supporting the growth of probiotic bacteria more effectively than other commercial GOS...
June 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27904393/the-production-of-synbiotic-bread-by-microencapsulation
#7
Mojan Seyedain-Ardabili, Anousheh Sharifan, Babak Ghiassi Tarzi
Bread is a global staple food. Despite attempts to develop functional breads containing viable microorganisms, this has not been done yet because of the high temperature during baking. The aim of this study is to obtain synbiotic bread, hence hamburger bun and white pan bread were selected. Lactobacillus acidophilus LA-5 and L. casei 431 were encapsulated with calcium alginate and Hi-maize resistant starch via emulsion technique and coated with chitosan. The morphology and size of microcapsules were measured by scanning electron microscopy and particle size analyser...
March 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27897356/chirality-synchronization-of-hydrogen-bonded-complexes-of-achiral-n-heterocycles
#8
Jens Buchs, Laura Vogel, Dietmar Janietz, Marko Prehm, Carsten Tschierske
2,4-Diamino-6-phenyl-1,3,5-triazines carrying a single oligo(ethylene oxide) (EO) chain form an optically isotropic mesophase composed of a conglomerate of macroscopic chiral domains with opposite sense of chirality even though the constituent molecules are achiral. This mesophase was proposed to result from the helical packing of hydrogen-bonded triazine aggregates, providing long-range chirality synchronization. The results provide first evidence for macroscopic achiral symmetry breaking upon conglomerate formation in an amorphous isotropic phase formed by hydrogen-bonded associates of simple N-heterocycles that are related to prebiotic molecules...
November 29, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27896547/chemical-analysis-of-a-miller-type-complex-prebiotic-broth-part-ii-gas-oil-water-and-the-oil-water-interface
#9
Sabrina Scherer, Eva Wollrab, Luca Codutti, Teresa Carlomagno, Stefan Gomes da Costa, Andreas Volkmer, Amela Bronja, Oliver J Schmitz, Albrecht Ott
We have analyzed the chemical variety obtained by Miller-Urey-type experiments using nuclear magnetic resonance (NMR) spectroscopy and coherent anti-Stokes Raman scattering (CARS) spectroscopy, gas chromatography followed by mass spectrometry (GC/MS) and two-dimensional gas chromatography followed by mass spectrometry (GCxGC/MS). In the course of a running Miller-Urey-type experiment, a hydrophobic organic layer emerged besides the hydrophilic aqueous phase and the gaseous phase that were initially present...
November 28, 2016: Origins of Life and Evolution of the Biosphere
https://www.readbyqxmd.com/read/27893069/new-medical-and-surgical-insights-into-neonatal-necrotizing-enterocolitis-a-review
#10
Brandy L Frost, Biren P Modi, Tom Jaksic, Michael S Caplan
Importance: Necrotizing enterocolitis (NEC) has long remained a significant cause of morbidity and mortality in neonatal intensive care units. While the mainstay of treatment for this devastating condition remains largely supportive, research efforts continue to be directed toward understanding pathophysiology as well as how best to approach surgical management when indicated. Observations: In this review, we first examine recent medical observations, including overviews on the microbiome and a brief review of the use of probiotics...
November 21, 2016: JAMA Pediatrics
https://www.readbyqxmd.com/read/27892611/towards-a-bacterial-treatment-for-armpit-malodour
#11
Chris Callewaert, Jo Lambert, Tom Van de Wiele
Axillary malodour is a frustrating condition for many people. It can lead to significant discomforts and various psychological effects. The underarm microbiome generally plays a major role in axillary malodour formation. Not only the bacteria on the armpit epidermis, but especially those living in the sweat glands, sweat pores and hair follicles play a pivotal role in malodour development. In order to treat underarm malodour, this viewpoint paper envisions a bacterial treatment. Replacing the autochthonous malodour causing microbiome with a non-odour causing microbiome, through an armpit bacterial transplantation or direct application of probiotics/non-odour causing bacteria could resolve the condition...
November 28, 2016: Experimental Dermatology
https://www.readbyqxmd.com/read/27890791/fecal-microbiota-manipulation-prevents-dysbiosis-and-alcohol-induced-liver-injury-in-mice
#12
Gladys Ferrere, Laura Wrzosek, Frédéric Cailleux, Williams Turpin, Virginie Puchois, Madeleine Spatz, Dragos Ciocan, Dominique Rainteau, Lydie Humbert, Cindy Hugot, Françoise Gaudin, Marie-Louise Noordine, Véronique Robert, Dominique Berrebi, Muriel Thomas, Sylvie Naveau, Gabriel Perlemuter, Anne-Marie Cassard
BACKGROUND AND AIMS: Alcoholic liver disease (ALD) is a leading cause of liver failure and mortality. In humans, severe alcoholic hepatitis is associated with key changes of intestinal microbiota (IM), which influences individual sensitivity to develop advanced ALD. We used the different susceptibility to ALD observed in two distinct animal facilities to test the efficiency of two complementary strategies (fecal microbiota transplantation and prebiotic treatment) to reverse dysbiosis and prevent ALD...
November 24, 2016: Journal of Hepatology
https://www.readbyqxmd.com/read/27890642/protective-effect-of-quercetin-on-high-fat-diet-induced-non-alcoholic-fatty-liver-disease-in-mice-is-mediated-by-modulating-intestinal-microbiota-imbalance-and-related-gut-liver-axis-activation
#13
David Porras, Esther Nistal, Susana Martínez-Flórez, Sandra Pisonero-Vaquero, José Luis Olcoz, Ramiro Jover, Javier González-Gallego, María Victoria García-Mediavilla, Sonia Sánchez-Campos
Gut microbiota is involved in obesity, metabolic syndrome and the progression of nonalcoholic fatty liver disease (NAFLD). It has been recently suggested that the flavonoid quercetin may have the ability to modulate the intestinal microbiota composition, suggesting a prebiotic capacity which highlights a great therapeutic potential in NAFLD. The present study aims to investigate benefits of experimental treatment with quercetin on gut microbial balance and related gut-liver axis activation in a nutritional animal model of NAFLD associated to obesity...
November 24, 2016: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/27889684/human-milk-oligosaccharide-effects-on-intestinal-function-and-inflammation-after-preterm-birth-in-pigs
#14
Stine O Rasmussen, Lena Martin, Mette V Østergaard, Silvia Rudloff, Michael Roggenbuck, Duc Ninh Nguyen, Per T Sangild, Stine B Bering
: Human milk oligosaccharides (HMOs) may mediate prebiotic and anti-inflammatory effects in newborns. This is particularly important for preterm infants who are highly susceptible to intestinal dysfunction and necrotizing enterocolitis (NEC). We hypothesized that HMO supplementation of infant formula (IF) improves intestinal function, bacterial colonization and NEC resistance immediately after preterm birth, as tested in a preterm pig model. Mixtures of HMOs were investigated in intestinal epithelial cells and in preterm pigs (n=112) fed IF supplemented without (CON) or with a mixture of four HMOs (4-HMO) or >25 HMOs (25-HMO, 5-10 g/L given for 5 or 11 days)...
November 4, 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/27888008/extracellular-expression-of-alkali-tolerant-xylanase-from-bacillus-subtilis-lucky9-in-e-coli-and-application-for-xylooligosaccharides-production-from-agro-industrial-waste
#15
Siyuan Chang, Yalan Guo, Bin Wu, Bingfang He
An alkali tolerant xylanase gene from Bacillus subtilis Lucky9 was cloned and extracellular expressed in E. coli BL21. Xylanase amino acid sequence showed 99% identity with xylanase sequence from Bacillus subtilis 168, and was belonged to glycoside hydrolase family 11. The recombinant E. coli (pET-pelB-xynLC9) containing pelB signal peptide produced extracellular xylanase of 436.5U/mL for 8h, which was used arabinose as extra carbon source and inducer for enhancing extracellular production. The extracellular xylanase was determined by SDS-PAGE with a relative molecular mass of 21kDa...
November 22, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27886374/effect-of-different-aloe-fractions-on-the-growth-of-lactic-acid-bacteria
#16
Giulia Chiodelli, Marco Pellizzoni, Gabriela Ruzickova, Luigi Lucini
Several foods on the market, such as yogurt and fermented milk, include mixtures of prebiotics and probiotic microorganisms effective in promoting the proliferation and equilibrium of intestinal bacteria, thus improving gut health. Particularly, researchers and the public have shown increasing interest in the combination of probiotics with natural substances that promote health or that can act as substrates to promote bacterial growth. The aim of this study is to evaluate the effects of different extracts of Aloe barbadensis and Aloe arborescens in fermented milk, taking into account both the prebiotic effect of aloe polysaccharides and the antimicrobial activity of several secondary metabolites...
November 25, 2016: Journal of Food Science
https://www.readbyqxmd.com/read/27876597/role-of-synbiotics-in-polysaccharide-assisted-colon-targeted-microspheres-of-mesalamine-for-the-treatment-of-ulcerative-colitis
#17
Rupinderjeet Kaur, Monica Gulati, Sachin Kumar Singh
The present study explains the effect of concomitant administration of synbiotics with the polysaccharide based colon targeted delivery system. As the gut microflora get deranged on administration of mesalamine, drug release from such delivery systems is expected to be jeopardised because the release trigger is dependent solely on the colonic microbiota. To overcome this limitation, mesalamine was formulated as microspheres with guar gum and xanthan gum (prebiotics). These were combined with probiotics containing Lactobacillus acidophilus, L...
November 19, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27875964/bioengineering-for-microbial-inulinases-trends-and-applications
#18
Puneet Kumar Singh, Vishal Kumar, Ruby Yadav, Pratyoosh Shukla
Inulinase has attracted attention due to their number of applications in various industries viz. pharmaceuticals, food and bioethanol. Enzymes due to their unique properties and enormous power of catalysis at very wide range of temperature are always in demand in industries. There are certain techniques which are employed to improve the productivity of enzymes as well as enhancing their catalytic activity. Modeling of structure of inulinase will provide an overview of the catalytic domain and help in improvising catalytic potential...
November 22, 2016: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/27874076/oligofructose-as-an-adjunct-in-treatment-of-diabetes-in-nod-mice
#19
Clement Chan, Colin M Hyslop, Vipul Shrivastava, Andrea Ochoa, Raylene A Reimer, Carol Huang
In type 1 diabetes, restoration of normoglycemia can be achieved if the autoimmune attack on beta cells ceases and insulin requirement is met by the residual beta cells. We hypothesize that an adjunctive therapy that reduces insulin demand by increasing insulin sensitivity will improve the efficacy of an immunotherapy in reversing diabetes. We tested the gut microbiota-modulating prebiotic, oligofructose (OFS), as the adjunctive therapy. We treated non-obese diabetic mice with an immunotherapy, monoclonal anti-CD3 antibody (aCD3), with or without concurrent dietary supplement of OFS...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27872611/hypocholesterolemic-and-prebiotic-effects-of-a-whole-grain-oat-based-granola-breakfast-cereal-in-a-cardio-metabolic-at-risk-population
#20
Michael L Connolly, Xenofon Tzounis, Kieran M Tuohy, Julie A Lovegrove
Meta-analyses of randomized controlled trials (RTC) have confirmed the hypocholesterolaemic effect of oats and oat based fibers. However, the mechanisms by which oats or oat fractions lower cholesterol is not totally clear. Recognizing the important role of the gut microbiome in metabolism and metabolic disease risk, we examined the impact of whole grain oat Granola (WGO) on the human gut microbiota and cardio-metabolic risk factors using a randomized crossover dietary intervention in at risk individuals (ClinicalTrials...
2016: Frontiers in Microbiology
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