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lactobacillus rhamnosus

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https://www.readbyqxmd.com/read/28100014/mg-2-improves-the-thermotolerance-of-probiotic-lactobacillus-rhamnosus-gg-lactobacillus-casei-zhang-and-lactobacillus-plantarum-p-8
#1
Yi Yang, Song Huang, Juan Wang, Gwénaël Jan, Romain Jeantet, Xiao Dong Chen
Food related carbohydrates and proteins are often used as thermoprotectant for probiotic lactobacilli during industrial production and processing. However, the effect of inorganic salts is rarely reported. Magnesium is the second-most abundant cation in bacteria, and commonly found in various foods. Mg(2+) homeostasis is important in Salmonella and has been reported to play a critical role in their thermotolerance. However, Mg(2+) role in thermotolerance of other bacteria, in particular probiotic bacteria, still remains a hypothesis...
January 18, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28079729/effect-of-probiotics-on-diarrhea-in-children-with-severe-acute-malnutrition-a-randomized-controlled-study-in-uganda
#2
Benedikte Grenov, Hanifa Namusoke, Betty Lanyero, Nicolette Nabukeera-Barungi, Christian Ritz, Christian Mølgaard, Henrik Friis, Kim F Michaelsen
OBJECTIVES: To assess the effect of probiotics on diarrhea during in- and outpatient treatment of children with severe acute malnutrition (SAM). METHODS: A randomized, double-blind, placebo-controlled study was conducted involving 400 children admitted with SAM. Patients received one daily dose of a blend of Bifidobacterium animalis subsp. lactis (BB-12) and Lactobacillus rhamnosus (LGG) (10 billion colony-forming units, 50:50) or placebo during hospitalization followed by an 8-12 week outpatient treatment period, depending on patients' recovery rate...
January 11, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28073366/oral-treatment-with-lactobacillus-rhamnosus-attenuates-behavioural-deficits-and-immune-changes-in-chronic-social-stress
#3
Aadil Bharwani, M Firoz Mian, Michael G Surette, John Bienenstock, Paul Forsythe
BACKGROUND: Stress-related disorders involve systemic alterations, including disruption of the intestinal microbial community. Given the putative connections between the microbiota, immunity, neural function, and behaviour, we investigated the potential for microbe-induced gut-to-brain signalling to modulate the impact of stress on host behaviour and immunoregulation. METHODS: Male C57BL/6 mice treated orally over 28 days with either Lactobacillus rhamnosus (JB-1) ™ or vehicle were subjected to chronic social defeat and assessed for alterations in behaviour and immune cell phenotype...
January 11, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28069821/characterization-of-engineered-preq1-riboswitches-for-inducible-gene-regulation-in-mycobacteria
#4
Erik R Van Vlack, Shana Topp, Jessica C Seeliger
: We report here the behavior of naturally occurring and rationally engineered preQ1 riboswitches and their application to inducible gene regulation in mycobacteria. Because mycobacteria lack preQ1 biosynthetic genes, we hypothesized that preQ1 could be used as an exogenous non-metabolite ligand to control riboswitches in mycobacteria. Selected naturally occurring preQ1 riboswitches were assayed and successfully drove preQ1-dependent repression of a GFP reporter in Mycobacterium smegmatis Using structure-based design, we engineered three preQ1 riboswitches from Thermoanaerobacter tencongensis, Bacillus subtilis, and Lactobacillus rhamnosus towards achieving higher response ratios and increased repression...
January 9, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28067041/utility-of-thermostable-xylanases-of-mycothermus-thermophilus-in-generating-prebiotic-xylooligosaccharides
#5
Rui Ma, Yingguo Bai, Huoqing Huang, Huiying Luo, Sanfeng Chen, Yunliu Fan, Lei Cai, Bin Yao
Xylooligosaccharides as emerging prebiotics are able to promote the growth of probiotic bacteria. In the present study, four neutral, thermostable xylanases (MtXyn11A, MtXyn11At, MtXyn11B and MtXyn11C) from compost fungus Mycothermus thermophilus CGMCC3.18119 were overexpressed in Pichia pastoris GS115 and used to produce xylooligosaccharides from beechwood xylan. The enzymes showed similar enzymatic properties (maximal activities at pH 6.06.5 and 65 C) but varied in catalytic efficiency and cleaving actions...
January 9, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28065621/the-association-between-loading-of-restorations-and-secondary-caries-lesions-is-moderated-by-the-restoration-material-elasticity
#6
Haitham Askar, Fredrik Brouwer, Michel Lehmensiek, Sebastian Paris, Falk Schwendicke
OBJECTIVES: Secondary caries limits the longevity of restorations and is thought to be associated with faulty restorations, e.g. dentin-restoration interfacial gaps. Recent evidence indicates that loading of restorations might aggravate the effects of gaps on interfacial mineral loss. It is unclear if this effect of loading is dose-dependent or not, and if restoration material properties like elasticity moderate the association between load and mineral loss. We hypothesized that mineral loss of secondary lesions increases with increasing load, and that this association is moderated by the elastic modulus of the placed restoration material...
January 5, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28063305/inhibitory-effects-of-lactobacillus-rhamnosus-and-lactobacillus-casei-on-candida-biofilm-of-denture-surface
#7
Young-Gyun Song, Sung-Hoon Lee
OBJECTIVE: Candida albicans biofilm is associated with denture-related stomatitis and oral candidiasis of elderly. Probiotics are beneficial bacteria and have antibacterial activity against pathogenic bacteria. The purpose of this study was to investigate the antifungal activity of various probiotics against C. albicans and the inhibitory effects of probiotics on Candida biofilm on the denture surface. DESIGN: The spent culture media of various probiotics were investigated the antifungal efficacy against C...
December 31, 2016: Archives of Oral Biology
https://www.readbyqxmd.com/read/28052594/network-meta-analysis-of-probiotics-to-prevent-respiratory-infections-in-children-and-adolescents
#8
REVIEW
Marina Azambuja Amaral, Gabriela Helena Barbosa Ferreira Guedes, Matias Epifanio, Mario Bernardes Wagner, Marcus Herbert Jones, Rita Mattiello
Probiotics have emerged as a promising intervention for the prevention of respiratory tract infections (RTIs) in children. Assess the effect of probiotics on prevention of RTIs in children and adolescents. MEDLINE, EMBASE, LILACS, SCIELO, CINAHL, SCOPUS, and Web of Science. Key words: "respiratory tract infections" AND probiotics. Randomized controlled trials RCT assessing the effect of probiotics on RTIs in children and adolescents were included. Two reviewers, working independently, to identify studies that met the eligibility criteria...
January 3, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28008787/a-review-of-dose-responses-of-probiotics-in-human-studies
#9
A C Ouwehand
The probiotic definition requires the administration of an 'adequate amount' in order to obtain a health benefit. What that amount should be is not indicated. Here, an overview is given of studies that investigated the dose-response relation of probiotics in human interventions. Studies were divided in; meta-analyses, meta-analyses on specific probiotic strains, and studies testing two or more doses of a probiotic (combination) in the same study. Meta-analyses on the effect of probiotics on antibiotic associated diarrhoea (AAD) suggest a dose-response effect; for Clostridium difficile-associated diarrhoea on the other hand no dose-response was observed...
December 23, 2016: Beneficial Microbes
https://www.readbyqxmd.com/read/28008786/a-probiotic-combination-attenuates-experimental-colitis-through-inhibition-of-innate-cytokine-production
#10
M S Kim, J S Byun, Y S Yoon, D Y Yum, M J Chung, J C Lee
Inflammatory bowel disease (IBD) is a severe immune cell-mediated syndrome characterised by extensive inflammatory and effector mucosal responses leading to tissue destruction in the colon and small intestine. The leading hypothesis is that dysbiosis of the gut flora causes an excessive immune response and inflammation in the gastrointestinal track. Lactic acid bacteria (LAB) can correct dysbiosis of the normal microbiota. In the current study, the therapeutic potential of seven LAB strains in combination to treat IBD was evaluated using experimental colitis model...
December 23, 2016: Beneficial Microbes
https://www.readbyqxmd.com/read/28008783/lactobacillus-rhamnosus-ncdc17-ameliorates-type-2-diabetes-by-improving-gut-function-oxidative-stress-and-inflammation-in-high-fat-diet-fed-and-streptozotocintreated-rats
#11
S Singh, R K Sharma, S Malhotra, R Pothuraju, U K Shandilya
Restoration of dysbiosed gut microbiota through probiotic may have profound effect on type 2 diabetes. In the present study, rats were fed high fat diet (HFD) for 3 weeks and injected with low dose streptozotocin to induce type 2 diabetes. Diabetic rats were then fed Lactobacillus rhamnosus NCDC 17 and L. rhamnosus GG with HFD for six weeks. L. rhamnosus NCDC 17 improved oral glucose tolerance test, biochemical parameters (fasting blood glucose, plasma insulin, glycosylated haemoglobin, free fatty acids, triglycerides, total cholesterol, low-density lipoprotein cholesterol and high-density lipoprotein cholesterol), oxidative stress (thiobarbituric acid reactive substance and activities of catalase, superoxide dismutase and glutathione peroxidase in blood and liver), bifidobacteria and lactobacilli in cecum, expression of glucagon like peptide-1 producing genes in cecum, and adiponection in epididymal fat, while decreased propionate proportions (%) in caecum, and expression of tumour necrosis factor-α and interlukin-6 in epididymal fat of diabetic rats as compared to diabetes control group...
December 23, 2016: Beneficial Microbes
https://www.readbyqxmd.com/read/28004480/a-metagenomic-study-of-the-preventive-effect-of-lactobacillus-rhamnosus-gg-on-intestinal-polyp-formation-in-apc-min-mice
#12
Yueqiong Ni, Victoria Ho Yee Wong, William Chi Shing Tai, Jun Li, Wing Yan Wong, Magnolia Muk Lan Lee, Fiona Long Yan Fong, Hani El-Nezami, Gianni Panagiotou
AIMS: To investigate the in vivo effects of Lactobacillus rhamnosus GG (LGG) on intestinal polyp development and the interaction between this single-organism probiotic and the gut microbiota therein. METHODS AND RESULTS: The Apc(Min/+) mouse model was used to study the potential preventive effect of LGG on intestinal polyposis, while shotgun metagenomic sequencing was employed to characterize both taxonomic and functional changes within gut microbial community. We found that the progression of intestinal polyps in the control group altered the community functional profile remarkably despite small variation in the taxonomic diversity...
December 22, 2016: Journal of Applied Microbiology
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/27992668/extensively-hydrolyzed-casein-formula-alone-or-with-l-rhamnosus-gg-reduces-%C3%AE-lactoglobulin-sensitization-in-mice
#15
Rosita Aitoro, Raffaele Simeoli, Antonio Amoroso, Lorella Paparo, Rita Nocerino, Claudio Pirozzi, Margherita Di Costanzo, Rosaria Meli, Carmen De Caro, Gianluca Picariello, Gianfranco Mamone, Antonio Calignano, Cathryn R Nagler, Roberto Berni Canani
BACKGROUND: Extensively hydrolyzed casein formula (EHCF) has been proposed for the prevention and is commonly used for the treatment of cow's milk allergy (CMA). The addition of the probiotic Lactobacillus rhamnosus GG (LGG) to EHCF may induces faster acquisition of tolerance to cow's milk. The mechanisms underlying this effect are largely unexplored. We investigated the effects of EHCF alone or in combination with LGG on β-lactoglobulin (BLG) sensitization in mice. METHODS: Three-weeks old C3H/HeOuJ mice were sensitized by oral administration of BLG using cholera toxin as adjuvant at weekly intervals for 5 weeks (sensitization period)...
December 19, 2016: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/27988389/probiotics-and-prevention-of-clostridium-difficile-infection
#16
E J C Goldstein, S J Johnson, P-J Maziade, C T Evans, J C Sniffen, M Millette, L V McFarland
The role of probiotics as adjunctive measures in the prevention of Clostridium difficile infection (CDI) has been controversial. However, a growing body of evidence has suggested that they have a role in primary prevention of CDI. Elements of this controversy are reviewed and the proposed mechanisms of action, the value and cost effectiveness of probiotics are addressed with a focus on three agents, Saccharomyces boulardii, Lactobacillus rhamnosus GG and the combination of Lactobacillus acidophilus CL1285, Lactobacillus casei LBC80R, Lactobacillus rhamnosus CLR2 (Bio-K+)...
December 14, 2016: Anaerobe
https://www.readbyqxmd.com/read/27982224/dentifrice-containing-extract-of-rosmarinus-officinalis-linn-an-antimicrobial-evaluation
#17
Marcela Agne Alves Valones, Jane Sheila Higino, Paulo Roberto Eleutério Souza, Sérgio Crovella, Arnaldo de França Caldas, Alessandra de Albuquerque Tavares Carvalho
This study aimed to evaluate the antimicrobial activity of a dentifrice containing an alcoholic extract of rosemary on oral bacteria, compared to a commercially available herbal dentifrice. Standard strains of Streptococcus mutans (ATCC 25175), Streptococcus oralis (ATCC 9811) and Lactobacillus rhamnosus (ATCC 7469) were used, as well as different toothpastes based on rosemary (TR), on propolis (TH), triclosan (positive control) (TPC) and non-fluoridated dentifrice (negative control) (TNC). Bacteria were seeded in Petri dishes and paper discs soaked with dilutions of dentifrice placed on the plates...
September 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27981539/growth-and-adhesion-to-ht-29-cells-inhibition-of-gram-negatives-by-bifidobacterium-longum-bb536-e-lactobacillus-rhamnosus-hn001-alone-and-in-combination
#18
R Inturri, A Stivala, P M Furneri, G Blandino
OBJECTIVE: The aim of this study was to test the inhibitory effect of supernatants of broth cultures of Bifidobacterium longum BB536 and Lactobacillus rhamnosus HN001, both individually and in combination, against Gram-negative strains (uropathogens, enteropathogens and a reference strain). Moreover, in vitro protection of B. longum BB536 and L. rhamnosus HN001, both individually and in combination, against pathogen adhesion to HT-29 cell line, was investigated. MATERIALS AND METHODS: The inhibitory activity was performed by the agar diffusion test and in vitro antagonistic activity against pathogen adhesion to human epithelial intestinal HT-29 cells was performed using standardized culture techniques...
December 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27975116/long-term-safety-assessment-in-children-who-received-hydrolyzed-protein-formulas-with-lactobacillus-rhamnosus-gg-a-5-year-follow-up
#19
Dmf Scalabrin, C Harris, W H Johnston, C L Berseth
: Extensively hydrolyzed (EH) formula with Lactobacillus rhamnosus GG (LGG) was demonstrated to alleviate cow's milk allergy (CMA) symptoms and promote faster acquisition of tolerance to cow's milk protein. We previously demonstrated that partially hydrolyzed (PH) and EH formulas with LGG supported normal growth in healthy-term infants through 120 days of age. The objective of the current study was to evaluate growth, development, and specific adverse events through 5 years of age in participants from that cohort who continued receiving study formula...
February 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/27939550/invited-review-microbe-mediated-aflatoxin-decontamination-of-dairy-products-and-feeds
#20
Sejeong Kim, Heeyoung Lee, Soomin Lee, Jeeyeon Lee, Jimyeong Ha, Yukyung Choi, Yohan Yoon, Kyoung-Hee Choi
Aspergillus flavus, Aspergillus parasiticus, and Aspergillus nomius contaminate corn, sorghum, rice, peanuts, tree nuts, figs, ginger, nutmeg, and milk. They produce aflatoxins, especially aflatoxin B1, which is classified as a Group 1 carcinogen by the International Agency for Research on Cancer. Many studies have focused on aflatoxin removal from food or feed, especially via microbe-mediated mechanisms-either adsorption or degradation. Of the lactic acid bacteria, Lactobacillus rhamnosus GG efficiently binds aflatoxin B1, and a peptidoglycan in the bacterium cell wall plays an important role...
December 8, 2016: Journal of Dairy Science
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