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Lactobacillus reuteri

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https://www.readbyqxmd.com/read/28060932/global-analysis-of-mannitol-2-dehydrogenase-in-lactobacillus-reuteri-crl-1101-during-mannitol-production-through-enzymatic-genetic-and-proteomic-approaches
#1
Maria Eugenia Ortiz, Juliana Bleckwedel, Silvina Fadda, Gianluca Picariello, Elvira M Hebert, Raúl R Raya, Fernanda Mozzi
Several plants, fungi, algae, and certain bacteria produce mannitol, a polyol derived from fructose. Mannitol has multiple industrial applications in the food, pharmaceutical, and medical industries, being mainly used as a non-metabolizable sweetener in foods. Many heterofermentative lactic acid bacteria synthesize mannitol when an alternative electron acceptor such as fructose is present in the medium. In previous work, we reported the ability of Lactobacillus reuteri CRL 1101 to efficiently produce mannitol from sugarcane molasses as carbon source at constant pH of 5...
2017: PloS One
https://www.readbyqxmd.com/read/28059108/4-3-%C3%AE-glucanotransferase-a-novel-reaction-specificity-in-glycoside-hydrolase-family-70-and-clan-gh-h
#2
Joana Gangoiti, Sander S van Leeuwen, Gerrit J Gerwig, Stéphane Duboux, Christina Vafiadi, Tjaard Pijning, Lubbert Dijkhuizen
Lactic acid bacteria possess a diversity of glucansucrase (GS) enzymes that belong to glycoside hydrolase family 70 (GH70) and convert sucrose into α-glucan polysaccharides with (α1 → 2)-, (α1 → 3)-, (α1 → 4)- and/or (α1 → 6)-glycosidic bonds. In recent years 3 novel subfamilies of GH70 enzymes, inactive on sucrose but using maltodextrins/starch as substrates, have been established (e.g. GtfB of Lactobacillus reuteri 121). Compared to the broad linkage specificity found in GSs, all GH70 starch-acting enzymes characterized so far possess 4,6-α-glucanotransferase activity, cleaving (α1 → 4)-linkages and synthesizing new (α1 → 6)-linkages...
January 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28057659/lactobacillus-reuteri-dsm-17938-in-the-prevention-of-antibiotic-associated-diarrhoea-in-children-protocol-of-a-randomised-controlled-trial
#3
Maciej Kołodziej, Hania Szajewska
INTRODUCTION: Administration of some probiotics appears to reduce the risk of antibiotic-associated diarrhoea (AAD). The effects of probiotics are strain-specific, thus, the efficacy and safety of each probiotic strain should be established separately. We aim to assess the effects of Lactobacillus reuteri DSM 17938 administration for the prevention of diarrhoea and AAD in children. METHODS AND ANALYSIS: A total of 250 children younger than 18 years treated with antibiotics will be enrolled in a double-blind, randomised, placebo-controlled trial in which they will additionally receive L...
January 5, 2017: BMJ Open
https://www.readbyqxmd.com/read/28055130/effect-of-biochanin-a-on-corn-grain-zea-mays-fermentation-by-bovine-rumen-amylolytic-bacteria
#4
Brittany E Harlow, Michael D Flythe, Glen E Aiken
AIMS: The objective was to determine the effect of biochanin A (BCA), an isoflavone produced by red clover (Trifolium pratense L.), on corn fermentation by rumen microorganisms. METHODS AND RESULTS: When bovine rumen bacterial cell suspensions (n = 3) were incubated (24 h, 39 °C) with ground corn, amylolytic bacteria including group D Gram-positive cocci (GPC; Streptococcus bovis; enterococci) proliferated, cellulolytic bacteria were inhibited, lactate accumulated, and pH declined...
January 5, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28042275/the-level-of-beta-defensin-2-in-saliva-and-its-expression-in-parotid-gland-epithelial-cells-after-probiotic-lactobacillus-reuteri-induction-to-inhibit-streptococcus-mutans-in-caries
#5
Tuti Kusumaningsih, M S Subijanto, Retno Indrawati, R Rini Devijanti
OBJECTIVE: The aim of this study was to prove that administrating L. reuteri probiotics can increase the level of BD-2 saliva and BD-2 expression in the epithelial parotid glands of Wistar rats. MATERIALS AND METHODS: Experimental design in this study was randomized control group post test only. Twenty-four white male Rattus norvegicus Wistar strain rats were divided into four groups. The negative control group included rats not induced by S. mutans whereas the positive control group included rats induced by S...
October 2016: European Journal of Dentistry
https://www.readbyqxmd.com/read/28041553/characterisations-of-lactobacillus-reuteri-sk24-003-glucansucrase-implications-for-%C3%AE-gluco-poly-and-oligosaccharides-biosynthesis
#6
Ming Miao, Yajun Ma, Bo Jiang, Steve W Cui, Zhengyu Jin, Tao Zhang
Glucansucrase was obtained from Lactobacillus reuteri SK24.003 and its characterizations and in vitro biosynthesis for glucose polymer and oligosaccharides were investigated. The final specific activity of glucansucrase was 1.3IU/mg protein with 8.6-fold purification and 8.7% recovery. The molecular weight of purified enzyme was 166.0kDa. The glucansucrase exhibited optimum activity at 30-35°C, whereas the maximum activity was obtained at pH 5.0-5.5. The double-charged ions including Mg(2+), Mn(2+), Ni(2+), Co(2+), Ca(2+), Fe(2+) and Zn(2+) activated the glucansucrase activities and Ca(2+) ion highly stimulated the activity by approximately 4 times...
May 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28038333/ultrasound-attenuation-of-lactobacilli-and-bifidobacteria-effect-on-some-technological-and-probiotic-properties
#7
Angela Racioppo, Maria Rosaria Corbo, Claudia Piccoli, Milena Sinigaglia, Barbara Speranza, Antonio Bevilacqua
Attenuation can be regarded as a tool to modulate the metabolism of probiotic bacteria and, consequently, a strategy to reduce the acidification of the active drinks. Attenuation can be done through chemical and physical approaches and ultrasound (US) is a possibility, previously tested to modulate the metabolism of lactic acid bacteria inoculated in a rice drink, but no data are available on the effect of this treatment of the overall profile of probiotic bacteria. Therefore, the main topic of this paper was to study the effect of US-attenuation on some properties of Lactobacillus reuteri, Lactobacillus plantarum, Bifidobacterium longum, and Bifidobacterium infantis (survival at pH2, and 2...
December 21, 2016: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28030590/redox-balance-in-lactobacillus-reuteri-dsm20016-roles-of-iron-dependent-alcohol-dehydrogenases-in-glucose-glycerol-metabolism
#8
Lu Chen, Paul David Bromberger, Gavin Nieuwenhuiys, Rajni Hatti-Kaul
Lactobacillus reuteri, a heterofermentative bacterium, metabolizes glycerol via a Pdu (propanediol-utilization) pathway involving dehydration to 3-hydroxypropionaldehyde (3-HPA) followed by reduction to 1,3-propandiol (1,3-PDO) with concomitant generation of an oxidized cofactor, NAD+ that is utilized to maintain cofactor balance required for glucose metabolism and even for oxidation of 3-HPA by a Pdu oxidative branch to 3-hydroxypropionic acid (3-HP). The Pdu pathway is operative inside Pdu microcompartment that encapsulates different enzymes and cofactors involved in metabolizing glycerol or 1,2-propanediol, and protects the cells from the toxic effect of the aldehyde intermediate...
2016: PloS One
https://www.readbyqxmd.com/read/28028690/effect-of-lactobacillus-reuteri-on-cell-viability-and-pge2-production-in-human-gingival-fibroblasts
#9
Gina A Castiblanco, Tulay Yucel-Lindberg, Stefan Roos, Svante Twetman
Emerging evidence suggests that probiotic therapy can play a role in the prevention and management of oral inflammatory diseases through immunomodulation and down-regulation of the inflammatory cascade. The aim of this in vitro study was to investigate the viability of human gingival fibroblasts (HGF) and its production of prostaglandin E2 (PGE2), when exposed to supernatants of two mixed Lactobacillus reuteri strains (ATCC PTA 5298 and DSM 17938). The experiments were conducted in the presence and absence of the pro-inflammatory cytokine IL-1β...
December 27, 2016: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28018325/sensitive-quantitative-analysis-of-the-meconium-bacterial-microbiota-in-healthy-term-infants-born-vaginally-or-by-cesarean-section
#10
Ravinder Nagpal, Hirokazu Tsuji, Takuya Takahashi, Kazunari Kawashima, Satoru Nagata, Koji Nomoto, Yuichiro Yamashiro
For decades, babies were thought to be born germ-free, but recent evidences suggest that they are already exposed to various bacteria in utero. However, the data on population levels of such pioneer gut bacteria, particularly in context to birth mode, is sparse. We herein aimed to quantify such bacteria from the meconium of 151 healthy term Japanese infants born vaginally or by C-section. Neonatal first meconium was obtained within 24-48 h of delivery; RNA was extracted and subjected to reverse-transcription-quantitative PCR using specific primers for Clostridium coccoides group, C...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28009106/metabolic-effects-of-lactobacillus-reuteri-dsm-17938-in-patients-with-type-2-diabetes-a-randomized-controlled-trial
#11
Reza Mobini, Valentina Tremaroli, Marcus Ståhlman, Fredrik Karlsson, Max Levin, Maria Ljungberg, Maja Sohlin, Heléne Bertéus Forslund, Rosie Perkins, Fredrik Bäckhed, Per-Anders Jansson
AIMS: To investigate the metabolic effects of 12-week oral supplementation with Lactobacillus reuteri DSM 17938 in patients with type 2 diabetes on insulin therapy. MATERIALS AND METHODS: In a double-blind trial, we randomized 46 patients with type 2 diabetes to placebo or a low (10(8) CFU/day) or high dose (10(10) CFU/day) of L. reuteri DSM 17938 for 12 weeks. The primary endpoint was the effect of supplementation on glycated hemoglobin (HbA1c). Secondary endpoints were insulin sensitivity (assessed by glucose clamp), liver fat content, body composition, body fat distribution, fecal microbiota composition and serum bile acids...
December 23, 2016: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/27999400/comparative-study-on-the-characteristics-of-weissella-cibaria-cmu-and-probiotic-strains-for-oral-care
#12
Hye-Jin Jang, Mi-Sun Kang, Sung-Hun Yi, Ji-Young Hong, Sang-Pil Hong
Probiotics have been demonstrated as a new paradigm to substitute antibiotic treatment for dental caries, gingivitis, and chronic periodontitis. The present work was conducted to compare the characteristics of oral care probiotics: Weissella cibaria CMU (Chonnam Medical University) and four commercial probiotic strains. Survival rates under poor oral conditions, acid production, hydrogen peroxide production, as well as inhibition of biofilm formation, coaggregation, antibacterial activity, and inhibition of volatile sulfur compounds were evaluated...
December 20, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27999281/probiotic-microorganisms-inhibit-epithelial-cell-internalization-of-botulinum-neurotoxin-serotype-a
#13
Tina I Lam, Christina C Tam, Larry H Stanker, Luisa W Cheng
Botulinum neurotoxins (BoNTs) are some of the most poisonous natural toxins known to man and are threats to public health and safety. Previous work from our laboratory showed that both BoNT serotype A complex and holotoxin can bind and transit through the intestinal epithelia to disseminate in the blood. The timing of BoNT/A toxin internalization was shown to be comparable in both the Caco-2 in vitro cell culture and in the oral mouse intoxication models. Probiotic microorganisms have been extensively studied for their beneficial effects in not only maintaining the normal gut mucosa but also protection from allergens, pathogens, and toxins...
December 16, 2016: Toxins
https://www.readbyqxmd.com/read/27994413/effects-of-probiotic-drop-containing-lactobacillus-rhamnosus-bifidobacterium-infantis-and-lactobacillus-reuteri-on-salivary-streptococcus-mutans-and-lactobacillus-levels
#14
Maryam Hajnorouzali Tehrani, Najmeh Akhlaghi, Leila Talebian, Jaber Emami, Siamak Etzad Keyhani
AIMS: The aim of the present study was to evaluate the effect of a probiotic drop containing Lactobacillus rhamnosus, Bifidobacterium infantis, and Lactobacillus reuteri on salivary counts of Streptococcus mutans (SM) and Lactobacillus (LB) in children 3-6 years of age. SETTINGS AND DESIGN: Sixty-one healthy children were randomly allocated into two parallel blocks in this double-blind, randomized controlled trial (IRCT2014120320202N1) from May to June 2015. SUBJECTS AND METHODS: Finally 53 participants consumed five drops of placebo (n = 23) or probiotic (n = 30) every night for 2 weeks...
October 2016: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/27994068/resetting-microbiota-by-lactobacillus-reuteri-inhibits-t-reg-deficiency-induced-autoimmunity-via-adenosine-a2a-receptors
#15
Baokun He, Thomas K Hoang, Ting Wang, Michael Ferris, Christopher M Taylor, Xiangjun Tian, Meng Luo, Dat Q Tran, Jain Zhou, Nina Tatevian, Fayong Luo, Jose G Molina, Michael R Blackburn, Thomas H Gomez, Stefan Roos, J Marc Rhoads, Yuying Liu
Regulatory T (T reg) cell deficiency causes lethal, CD4(+) T cell-driven autoimmune diseases. Stem cell transplantation is used to treat these diseases, but this procedure is limited by the availability of a suitable donor. The intestinal microbiota drives host immune homeostasis by regulating the differentiation and expansion of T reg, Th1, and Th2 cells. It is currently unclear if T reg cell deficiency-mediated autoimmune disorders can be treated by targeting the enteric microbiota. Here, we demonstrate that Foxp3(+) T reg cell deficiency results in gut microbial dysbiosis and autoimmunity over the lifespan of scurfy (SF) mouse...
January 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27956866/potential-of-lactobacillus-reuteri-from-spontaneous-%C3%A2-sourdough-as-a-starter-additive-for-improving-quality-parameters-of-bread
#16
Dovilė Jonkuvienė, Lina Vaičiulytė-Funk, Joana Šalomskienė, Gitana Alenčikienė, Aldona Mieželienė
Retardation of microbial spoilage of bread can be achieved by the use of spontaneous sourdough with an antimicrobial activity. This study was undertaken to identify lactic acid bacteria naturally occurring in spontaneous sourdough and use them for quality improvement and prolonging shelf life of rye, wheat and rye with wheat bread. Identification of isolates from spontaneous sourdough by pyrosequencing assay showed that Lactobacillus reuteri were dominant lactic acid bacteria. The isolates showed a wide range of antimicrobial activity and displayed a synergistic activity against other lactobacilli, some lactococci and foodborne yeasts...
September 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27911907/expression-of-an-engineered-4-6-%C3%AE-glucanotransferase-in-potato-results-in-changes-in-starch-characteristics
#17
Xuan Xu, Annemarie Dechesne, Richard G F Visser, Luisa M Trindade
Starch structure strongly influences starch physicochemical properties, determining the end uses of starch in various applications. To produce starches with novel structure and exploit the mechanism of starch granule formation, an (engineered) 4, 6-α-glucanotransferase (GTFB) from Lactobacillus reuteri 121 was introduced into two potato genetic backgrounds: amylose-containing line Kardal and amylose-free mutant amf. The resulting starches showed severe changes in granule morphology regardless of genetic backgrounds...
2016: PloS One
https://www.readbyqxmd.com/read/27906800/lactobacillus-reuteri-dsm-17938-in-the-treatment-of-functional-abdominal-pain-in-children-rct-study
#18
Oleg Jadrešin, Iva Hojsak, Zrinjka Mišak, Alemka Jaklin Kekez, Tena Trbojević, Lana Ivković, Sanja Kolaček
OBJECTIVES: Beneficial therapeutic effect of probiotics has been reported in children with the irritable bowel syndrome (IBS) but not consistently in other functional abdominal pain-related disorders. The aim of this study was to investigate the effect of Lactobacillus (L.) reuteri DSM 17938 in the treatment of functional abdominal pain (FAP) and IBS in children. METHODS: Children (age 4-18 years) referred to pediatric gastroenterologist at Children's Hospital Zagreb from May 2012 to December 2014, diagnosed as FAP or IBS, were randomized to receive L...
November 30, 2016: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/27878162/asymmetric-chemoenzymatic-synthesis-of-1-3-diols-and-2-4-disubstituted-aryloxetanes-by-using-whole-cell-biocatalysts
#19
Paola Vitale, Filippo Maria Perna, Gennaro Agrimi, Antonio Scilimati, Antonio Salomone, Cosimo Cardellicchio, Vito Capriati
Regio- and stereo-selective reduction of substituted 1,3-aryldiketones, investigated in the presence of different whole cell microorganisms, was found to afford β-hydroxyketones or 1,3-diols in very good yields (up to 95%) and enantiomeric excesses (up to 96%). The enantiomerically enriched aldols, obtained with the opposite stereo-preference by baker's yeast and Lactobacillus reuteri DSM 20016 bioreduction, could then be diastereoselectively transformed into optically active syn- or anti-1,3-diols by a careful choice of the chemical reducing agent (diastereomeric ratio up to 98 : 2)...
December 28, 2016: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/27873545/presence-of-lactobacillus-reuteri-in-saliva-coincide-with-higher-salivary-iga-in-young-adults-after-intake-of-probiotic-lozenges
#20
G Braathen, V Ingildsen, S Twetman, D Ericson, M R Jørgensen
The aim of this study was to compare the concentration of salivary immunoglobulin A (IgA) and the selected interleukins (IL)-1β, IL-6, IL-8 and IL-10 in young individuals with presence and non-presence of Lactobacillus reuteri in saliva after a three-week intervention with probiotic lozenges. The study group consisted of 47 healthy individuals aged 18-32 years with no clinical signs of oral inflammation. In a randomised, double-blind, placebo-controlled, cross-over trial participants ingested two lozenges per day containing two strains of the probiotic bacterium L...
November 22, 2016: Beneficial Microbes
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