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Lactobacillus rhamnosus GG

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https://www.readbyqxmd.com/read/28502295/-lactobacillus-rhamnosus-gg-improves-symptoms-and-its-mechnism-in-mice-with-ovalbumin-induced-food-allergy
#1
Shuanfeng Fang, Yu Zhang, Yun Zhang, Xiaohua Zhu, Bei Yie
Objective To investigate the effect of Lactobacillus rhamnosus GG (LGG) on peripheral blood IL-4/IFN-γ in mice with ovalbumin-induced food allergy. Methods The mice with food allergy were divided into 3 groups (n=10 in each group): food allergy model group, low-dose LGG group (1×10(8) CFU/mL, 200 μL/d) and high-dose LGG group (1×10(9) CFU/mL, 200 μL/d). The healthy mice (n=10) served as a control group. Mice in the LGG groups were given LGG for consecutive 22 days after modeling. The control mice and the food allergy model mice were given normal saline instead of LGG...
May 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28493885/genotypic-and-phenotypic-diversity-of-lactobacillus-rhamnosus-clinical-isolates-their-comparison-with-strain-gg-and-their-recognition-by-complement-system
#2
Eija Nissilä, François P Douillard, Jarmo Ritari, Lars Paulin, Hanna M Järvinen, Pia Rasinkangas, Karita Haapasalo, Seppo Meri, Hanna Jarva, Willem M de Vos
Lactobacillus rhamnosus strains are ubiquitous in fermented foods, and in the human body where they are commensals naturally present in the normal microbiota composition of gut, vagina and skin. However, in some cases, Lactobacillus spp. have been implicated in bacteremia. The aim of the study was to examine the genomic and immunological properties of 16 clinical blood isolates of L. rhamnosus and to compare them to the well-studied L. rhamnosus probiotic strain GG. Blood cultures from bacteremic patients were collected at the Helsinki University Hospital laboratory in 2005-2011 and L...
2017: PloS One
https://www.readbyqxmd.com/read/28443531/probiotics-to-prevent-necrotising-enterocolitis-and-nosocomial-infection-in-very-low-birth-weight-preterm-infants
#3
J Uberos, E Aguilera-Rodríguez, A Jerez-Calero, M Molina-Oya, A Molina-Carballo, E Narbona-López
The aim of the study was to determine whether routine probiotic supplementation (RPS) with Lactobacillus rhamnosus GG (LGG) or Lactobacillus acidophilus +Lactobacillus bifidum is associated with reduced risk of necrotising enterocolitis (NEC)≥Stage II in preterm neonates born at ≤32 weeks' gestation. We conducted a retrospective cohort study on the effect of probiotic supplementation in very low birth weight infants in our neonatal unit by comparing two periods: before and after supplementation. The incidence of NEC≥Stage II, late-onset sepsis and all-cause mortality was compared for an equal period 'before' (Period I) and 'after' (Period II) RPS with LGG or L...
April 26, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28403649/a-survey-of-probiotic-use-practices-among-patients-at-a-tertiary-medical-centre
#4
K Draper, C Ley, J Parsonnet
Probiotic use has skyrocketed in recent years. Little is known, however, about patient knowledge and practices regarding probiotic use, especially in the context of antibiotic use. An invitation to complete a short, anonymous, electronic survey was sent by email to 965 patients at a tertiary medical centre in California who had agreed to be contacted for participation in research studies. Questions were asked about both probiotic and antibiotic use in the prior three months. Of 333 survey respondents, 55% had recently used probiotics, including food products and/or supplements (90 and 60% of probiotic users, respectively)...
April 13, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28369512/galleria-mellonella-as-an-in-vivo-model-for-assessing-the-protective-activity-of-probiotics-against-gastrointestinal-bacterial-pathogens
#5
Concetta Scalfaro, Angelo Iacobino, Chiara Nardis, Giovanna Franciosa
The antagonistic activity against gastrointestinal bacterial pathogens is an important property of probiotic bacteria and a desirable feature for pre-selection of novel strains with probiotic potential. Pre-screening of candidate probiotics for antibacterial activity should be based on in vitro and in vivo tests. This study investigated whether the protective activity of probiotic bacteria against gastrointestinal bacterial pathogens can be evaluated using Galleria mellonella larvae as an in vivo model. Larvae were pre-inoculated with either of two widely used probiotic bacteria, Lactobacillus rhamnosus GG or Clostridium butyricum Miyairi 588, and then challenged with Salmonella enterica Typhimurium, enteropathogenic Escherichia coli or Listeria monocytogenes...
April 1, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28346719/reduced-th22-cell-proportion-and-prevention-of-atopic-dermatitis-in-infants-following-maternal-probiotic-supplementation
#6
Anne Dorthea Bjerkenes Rø, Melanie Rae Simpson, Torstein Baade Rø, Ola Storrø, Roar Johnsen, Vibeke Videm, Torbjørn Øien
In the randomized, controlled study Probiotics in the Prevention of Allergy among Children in Trondheim (ProPACT), maternal probiotic supplementation reduced the incidence of atopic dermatitis (AD) in the offspring. In the current study, we hypothesized that the effect was mediated by a shift in the T helper (Th) cells in the children. OBJECTIVE: To examine whether Th cell proportions were affected by maternal probiotic supplementation and thus could mediate the preventive effect of probiotics on AD...
March 27, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28293233/the-soil-bacterium-methylococcus-capsulatus-bath-interacts-with-human-dendritic-cells-to-modulate-immune-function
#7
Stine Indrelid, Charlotte Kleiveland, René Holst, Morten Jacobsen, Tor Lea
The prevalence of inflammatory bowel disease (IBD) has increased in Western countries during the course of the twentieth century, and is evolving to be a global disease. Recently we showed that a bacterial meal of a non-commensal, non-pathogenic methanotrophic soil bacterium, Methylococcus capsulatus Bath prevents experimentally induced colitis in a murine model of IBD. The mechanism behind the effect has this far not been identified. Here, for the first time we show that M. capsulatus, a soil bacterium adheres specifically to human dendritic cells, influencing DC maturation, cytokine production, and subsequent T cell activation, proliferation and differentiation...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28287654/use-of-imaging-techniques-to-identify-efficient-controlled-release-systems-of-lactobacillus-rhamnosus-gg-during-in-vitro-digestion
#8
Justine Guerin, Jennifer Burgain, Frédéric Borges, Bhesh Bhandari, Stéphane Desobry, Joël Scher, Claire Gaiani
Matrix composition plays a crucial role in the controlled release of viable and functional bacteria in the intestine. Imaging tools such as electronic and confocal microscopies were used in this work to investigate the influence of matrix composition on matrix integrity and porosity, bacterial spatial distribution and viability during simulated in vitro digestion. L. rhamnosus GG was encapsulated in matrices having different casein/whey protein ratios. The formulation with a casein/whey ratio of 60/40 presented a porous weak gel structure that resulted in its fast disintegration in gastric media showing the presence of dead bacteria in the intestine...
April 19, 2017: Food & Function
https://www.readbyqxmd.com/read/28262688/lactobacillus-rhamnosus-gg-supernatant-enhance-neonatal-resistance-to-systemic-escherichia-coli-k1-infection-by-accelerating-development-of-intestinal-defense
#9
Xiaolong He, Qing Zeng, Santhosh Puthiyakunnon, Zhijie Zeng, Weijun Yang, Jiawen Qiu, Lei Du, Swapna Boddu, Tongwei Wu, Danxian Cai, Sheng-He Huang, Hong Cao
The objective of this study was to determine whether Lactobacillus rhamnosus GG culture supernatant (LCS) has a preventive effect against gut-derived systemic neonatal Escherichia coli (E. coli) K1 infection. The preventive effects were evaluated in human colonic carcinoma cell line Caco-2 and neonatal rat models. Our in vitro results showed that LCS could block adhesion, invasion and translocation of E. coli K1 to Caco-2 monolayer via up-regulating mucin production and maintaining intestinal integrity. In vivo experiments revealed that pre-treatment with LCS significantly decrease susceptibility of neonatal rats to oral E...
March 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28256070/selective-method-for-identification-and-quantification-of-bifidobacterium-animalis-subspecies-lactis-bb-12-bb-12-from-the-gastrointestinal-tract-of-healthy-volunteers-ingesting-a-combination-probiotic-of-bb-12-and-lactobacillus-rhamnosus-gg
#10
D D Poutsiaka, I J Mahoney, L A McDermott, L L Stern, C M Thorpe, A V Kane, C Baez-Giangreco, J McKinney, L E Davidson, R Leyva, B Goldin, D R Snydman
AIM: To develop a novel validated method for the isolation of Bifidobacterium animalis ssp. lactis BB-12 (BB-12) from faecal specimens and apply it to studies of BB-12 and Lactobacillus rhamnosus GG (LGG) recovered from the healthy human gastrointestinal (GI) tract. METHODS AND RESULTS: A novel method for isolating and enumerating BB-12 was developed based on its morphologic features of growth on tetracycline-containing agar. The method identified BB-12 correctly from spiked stool close to 100% of the time as validated by PCR confirmation of identity, and resulted in 97-104% recovery of BB-12...
March 3, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28256022/lactobacillus-rhamnosus-gg-probiotic-enteric-regimen-does-not-appreciably-alter-the-gut-microbiome-or-provide-protection-against-gvhd-after-allogeneic-hematopoietic-stem-cell-transplantation
#11
Elan Gorshein, Catherine Wei, Susan Ambrosy, Shanna Budney, Juliana Vivas, Angelika Shenkerman, Jacqueline Manago, Mary Kate McGrath, Anne Tyno, Yong Lin, Vimal Patel, Mecide Gharibo, Dale Schaar, Robert R Jenq, Hossein Khiabanian, Roger Strair
Graft-versus-host disease (GVHD) is a major adverse effect associated with allogeneic stem cell transplant. Previous studies in mice indicated that administration of the probiotic Lactobacillus rhamnosus GG can reduce the incidence of GVHD after hematopoietic stem cell transplant. Here we report results from the first randomized probiotic enteric regimen trial in which allogenic hematopoietic stem cell patients were supplemented with Lactobacillus rhamnosus GG. Gut microbiome analysis confirmed a previously reported gut microbiome association with GVHD...
March 3, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28244112/in-vitro-fermentation-of-oat-%C3%AE-glucan-and-hydrolysates-by-fecal-microbiota-and-selected-probiotic-strains
#12
Ji-Lin Dong, Xiao Yu, Liang-Er Dong, Rui-Ling Shen
BACKGROUND: Emerging evidence suggested that the prebiotic ability of β-glucan was intimately related to its molecular weight (Mw ). However, the effect of oat β-glucan with differing Mw on gut homeostasis was inconsistent. Importantly, knowledge of the fermentation properties of oat β-glucan fractions was still limited. The present study aimed to evaluate the prebiotic potential of raw and hydrolyzed oat β-glucan during in vitro fermentation by fecal microbiota and selected probiotic strains...
February 28, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28236643/selection-of-indigenous-lactobacillus-paracasei-cd4-and-lactobacillus-gastricus-btm-7-as-probiotic-assessment-of-traits-combined-with-principal-component-analysis
#13
Kavita Sharma, Rishi Mahajan, Sampan Attri, Gunjan Goel
AIMS: The population of Himalayan region is known to consume variety of fermented and non fermented foods and as a result they have been benefited in terms of overall health, because of the associated beneficial microbes. Therefore, the focus of the present study was to identify new strains of Lactic Acid Bacteria (LAB) from dairy products such as milk (cow, goat, buffalo) and fermented products (curd and buttermilk) with properties suitable for use as probiotic cultures. METHODS AND RESULTS: A total of 75 isolates tentatively identified as LAB from 100 samples were initially screened for production of β-hemolysin as indicators of virulence which resulted in 38 isolates with no haemolytic activity...
February 25, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28193434/the-effect-of-non-standard-heat-treatment-of-sheep-s-milk-on-physico-chemical-properties-sensory-characteristics-and-the-bacterial-viability-of-classical-and-probiotic-yogurt
#14
Šimun Zamberlin, Dubravka Samaržija
Classical and probiotic set yogurt were made using non-standard heat treatment of sheep's milk at 60°C/5min. Physico-chemical properties, sensory characteristics, and the viability of bacteria that originated from cultures in classical and probiotic yogurt were analysed during 21days of storage at 4°C. For the production of yogurt, a standard yogurt culture and a probiotic strain Lactobacillus rhamnosus GG were used. At the end of storage time of the classical and probiotic yogurt the totals of non-denatured whey proteins were 92...
June 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28132503/effect-of-drying-methods-on-protein-and-dna-conformation-changes-in-lactobacillus-rhamnosus-gg-cells-by-fourier-transform-infrared-spectroscopy
#15
Mya M Hlaing, Bayden R Wood, Don McNaughton, DanYang Ying, Geoff Dumsday, Mary Ann Augustin
Microencapsulation protects cells against environmental stress encountered during the production of probiotics, which are used as live microbial food ingredients. Freeze-drying and spray-drying are used in the preparation of powdered microencapsulated probiotics. This study examines the ability of Fourier transform infrared (FTIR) spectroscopy to detect differences in cells exposed to freeze-drying and spray-drying of encapsulated Lactobacillus rhamnosus GG cells. The FTIR analysis clearly demonstrated there were more significant molecular changes in lipid, fatty acid content, protein, and DNA conformation of nonencapsulated compared to encapsulated bacterial cells...
February 20, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28109094/-lactobacillus-rhamnosus-gg-conditioned-medium-prevents-e-coli-meningitis-by-inhibiting-nuclear-factor-%C3%AE%C2%BAb-pathway
#16
Qing Zeng, Xiao-Long He, Han-Sheng Xiao, Lei DU, Yu-Jing Li, Le-Cheng Chen, Hui-Wen Tian, Sheng-He Huang, Hong Cao
OBJECTIVE: To investigate whether Lactobacillus rhamnosus GG conditioned medium(LGG-CM)has preventive effect against E. coli K1-induced neuropathogenicity in vitro by inhibiting nuclear factor-κB (NF-κB) signaling pathway. METHODS: An in vitro blood-brain barrier (BBB) model was constructed using human brain microvascular endothelial cells (HBMECs). The effect of LGG-CM on E. coli-actived NF-κB signaling pathway was assayed using Western blotting. Invasion assay and polymorphonuclear leukocyte (PMN) transmigration assay were performed to explore whether LGG-CM could inhibit E...
January 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28106205/synbiotic-amazonian-palm-berry-a%C3%A3-ai-euterpe-oleracea-mart-ice-cream-improved-lactobacillus-rhamnosus-gg-survival-to-simulated-gastrointestinal-stress
#17
Mayra Garcia Maia Costa, Gabriela Namur Ooki, Antônio Diogo Silva Vieira, Raquel Bedani, Susana Marta Isay Saad
The effect of açai pulp ice cream and of its supplementation with inulin (I), whey protein concentrate (WC), and/or whey protein isolate (WI) on the viability and resistance to simulated gastrointestinal stress of the probiotic Lactobacillus (Lb.) rhamnosus GG strain throughout storage at -18 °C for up to 112 days was evaluated and morphological changes during stress were monitored. Lb. rhamnosus GG viability was stable in all formulations for up to 112 days of storage, preserving populations around 9 log CFU g(-1)...
February 22, 2017: Food & Function
https://www.readbyqxmd.com/read/28100014/mg-2-improves-the-thermotolerance-of-probiotic-lactobacillus-rhamnosus-gg-lactobacillus-casei-zhang-and-lactobacillus-plantarum-p-8
#18
Y Yang, S Huang, J Wang, G Jan, R Jeantet, X D Chen
Food-related carbohydrates and proteins are often used as thermoprotectants 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, the role of Mg(2+) 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/28067041/utility-of-thermostable-xylanases-of-mycothermus-thermophilus-in-generating-prebiotic-xylooligosaccharides
#19
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...
February 3, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28008787/a-review-of-dose-responses-of-probiotics-in-human-studies
#20
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
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