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Lactobacillus rhamnosus GG

Ludmila Khailova, Christine H Baird, Aubri A Rush, Christopher Barnes, Paul E Wischmeyer
BACKGROUND & AIMS: Recent clinical trials and in vivo models demonstrate probiotic administration can reduce occurrence and improve outcome of pneumonia and sepsis, both major clinical challenges worldwide. Potential probiotic benefits include maintenance of gut epithelial barrier homeostasis and prevention of downstream organ dysfunction due to systemic inflammation. However, mechanism(s) of probiotic-mediated protection against pneumonia remain poorly understood. This study evaluated potential mechanistic targets in the maintenance of gut barrier homeostasis following Lactobacillus rhamnosus GG (LGG) treatment in a mouse model of pneumonia...
October 1, 2016: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
Alessia Cicenia, Floriana Santangelo, Lucrezia Gambardella, Lucia Pallotta, Valerio Iebba, Annunziata Scirocco, Massimo Marignani, Guglielmo Tellan, Marilia Carabotti, Enrico Stefano Corazziari, Serena Schippa, Carola Severi
BACKGROUND: Some beneficial effects of probiotics may be due to secreted probiotic-derived factors, identified as "postbiotic" mediators. The aim of this study was to evaluate whether supernatants harvested from Lactobacillus rhamnosus GG (LGG) cultures (ATCC53103 strain) protect colonic human smooth muscle cells (HSMCs) from lipopolysaccharide (LPS)-induced myogenic damage. MATERIALS AND METHODS: LGG was grown in de Man, Rogosa, Share medium at 37°C and samples were collected in middle and late exponential, stationary, and overnight phases...
November 2016: Journal of Clinical Gastroenterology
Himaja N, Hemalatha R, K Narendra Babu, Shujauddin Mohd
BACKGROUND: Prebiotics from various regularly consumed cereals and novel substrates are currently being utilized as functional foods. The aim of this study was to determine the effect of synbiotic, formulated with prebiotic extracted from natural resources like green gram (Vigna radiata) along with probiotic Lactobacillus rhamnosus GG (LGG) in modulating immune responses in the offspring when supplemented during gestation and lactation. RESULTS: Synbiotic supplementation was effective in improving cell mediated immunity (CMI) and humoral immunity among F0 dams...
October 3, 2016: Journal of the Science of Food and Agriculture
F-C Huang, S-C Huang
Salmonella spp. remains a major public health problem for the whole world. Intestinal epithelial cells serve as an essential component of the innate mucosal immune system to defend against Salmonella infection. A substantial amount of evidence has accumulated that probiotics can regulate interleukin 8 (IL-8) involved in innate immunity. However, the exact effect of probiotics on epithelial IL-8 response to Salmonella infection is not well understood. Therefore, we investigated the action of probiotics on Salmonella-infected Caco-2 cells and its novel mechanisms...
September 29, 2016: Beneficial Microbes
Athena Grounta, Paschalis Harizanis, Eleftherios Mylonakis, George-John E Nychas, Efstathios Z Panagou
The use of Galleria mellonella as a model host to elucidate microbial pathogenesis and search for novel drugs and therapies has been well appreciated over the past years. However, the effect of microorganisms with functional appeal in the specific host remains scarce. The present study investigates the effect of treatment with selected lactic acid bacteria (LAB) with probiotic potential, as potential protective agents by using live or heat-killed cells at 6 and 24 h prior to infection with Listeria monocytogenes and Staphylococcus aureus or as potential therapeutic agents by using cell-free supernatants (CFS) after infection with the same pathogens...
2016: PloS One
Magdalena Janczarek, Teresa Bachanek, Elżbieta Mazur, Renata Chałas
The dynamic development of knowledge in the field of probiotics was commenced at the beginning of the 20th century. Since then, many ways of their possible usage in medicine have been established. In accordance with the WHO, probiotics are live microorganisms, which if applied in adequate amounts may benefit the host. Among probiotics, fungi and bacteria are distinguished, and mechanisms of action of these organisms in the oral cavity and gut are parallel. Application in dentistry, in prophylaxis and treatment of oral diseases is still not well known...
2016: Postȩpy Higieny i Medycyny Doświadczalnej
Lufang Chen, Keying Xu, Qifeng Gui, Yue Chen, Deying Chen, Yunmei Yang
A number of clinical trials have demonstrated that the use of probiotics has the potential to prevent nosocomial infections. However, the mechanism underlying probiotic-induced anti-infection and sepsis remains to be investigated. In the present study, 200 µl/day of Lactobacillus rhamnosus GG (LGG) or normal saline (control) was orally administrated to 4-week-old C57BL6 mice 4 weeks prior to cecal ligation and puncture (CLP). A number of mice were sacrificed 24 h after CLP, and the remaining mice were used for survival studies...
September 2016: Experimental and Therapeutic Medicine
Victoria J Martin, Wayne G Shreffler, Qian Yuan
BACKGROUND The prevalence of allergic diseases has been dramatically rising in the United States and other developed nations over recent decades. Growing evidence suggests a partial role for the microbiome in the development of these allergic diseases. Food protein-induced allergic proctocolitis (AP) (also referred to as cow's milk protein intolerance or allergy) is among the earliest and most common food allergic diseases of infancy, yet its pathophysiology is not well understood. The currently accepted clinical practice is to restrict the diet until 12 months of age...
2016: American Journal of Case Reports
Mariya I Petrova, Nicole C E Imholz, Tine L A Verhoeven, Jan Balzarini, Els J M Van Damme, Dominique Schols, Jos Vanderleyden, Sarah Lebeer
OBJECTIVES: Increased antibiotic resistance has catalyzed the research on new antibacterial molecules and alternative strategies, such as the application of beneficial bacteria. Since lectin molecules have unique sugar-recognizing capacities, and pathogens are often decorated with sugars that affect their survival and infectivity, we explored whether lectins from the probiotic strain Lactobacillus rhamnosus GG have antipathogenic properties. METHODS: The genome sequence of L...
2016: PloS One
Shirong Cai, Matheswaran Kandasamy, Juwita N Rahmat, Sin Mun Tham, Boon Huat Bay, Yuan Kun Lee, Ratha Mahendran
This study evaluates the ability of Lactobacillus rhamnosus GG (LGG) to activate DC and neutrophils and modulate T cell activation and the impact of bacterial dose on these responses. Murine bone marrow derived DC or neutrophils were stimulated with LGG at ratios of 5 : 1, 10 : 1, and 100 : 1 (LGG : cells) and DC maturation (CD40, CD80, CD86, CD83, and MHC class II) and cytokine production (IL-10, TNF-α, and IL-12p70) were examined after 2 h and 18 h coculture and compared to the ability of BCG (the present immunotherapeutic agent for bladder cancer) to stimulate these cells...
2016: Journal of Immunology Research
Lorella Paparo, Rita Nocerino, Linda Cosenza, Rosita Aitoro, Valeria D'Argenio, Valentina Del Monaco, Carmen Di Scala, Antonio Amoroso, Margherita Di Costanzo, Francesco Salvatore, Roberto Berni Canani
BACKGROUND: DNA methylation of the Th1 and Th2 cytokine genes is altered during cow's milk allergy (CMA). Forkhead box transcription factor 3 (FoxP3) is essential for the development and function of regulatory T cells (Tregs) and is involved in oral tolerance acquisition. We assessed whether tolerance acquisition in children with IgE-mediated CMA is associated with DNA demethylation of the Treg-specific demethylated region (TSDR) of FoxP3. RESULTS: Forty children (aged 3-18 months) were enrolled: 10 children with active IgE-mediated CMA (group 1), 10 children who outgrew CMA after dietary treatment with an extensively hydrolyzed casein formula containing the probiotic Lactobacillus rhamnosus GG (group 2), 10 children who outgrew CMA after treatment with other formulas (group 3), and 10 healthy controls (group 4)...
2016: Clinical Epigenetics
Mark Trinder, Tim W McDowell, Brendan A Daisley, Sohrab N Ali, Hon S Leong, Mark W Sumarah, Gregor Reid
: Organophosphate pesticides used in agriculture can pose health risks to humans and wildlife. We hypothesized that dietary supplementation with Lactobacillus, a genus of commensal bacteria, would reduce absorption and toxicity of consumed organophosphate pesticides (parathion and chlorpyrifos [CP]). Several Lactobacillus species were screened for toleration of 100 ppm of CP or parathion in MRS broth based on 24-h growth curves. Certain Lactobacillus strains were unable to reach stationary-phase culture maxima and displayed an abnormal culture morphology in response to pesticide...
October 15, 2016: Applied and Environmental Microbiology
Deborah J Cook, Jennie Johnstone, John C Marshall, Francois Lauzier, Lehana Thabane, Sangeeta Mehta, Peter M Dodek, Lauralyn McIntyre, Joe Pagliarello, William Henderson, Robert W Taylor, Rodrigo Cartin-Ceba, Eyal Golan, Margaret Herridge, Gordon Wood, Daniel Ovakim, Tim Karachi, Michael G Surette, Dawn M E Bowdish, Daphnee Lamarche, Chris P Verschoor, Erick H Duan, Diane Heels-Ansdell, Yaseen Arabi, Maureen Meade
BACKGROUND: Probiotics are live microorganisms that may confer health benefits when ingested. Randomized trials suggest that probiotics significantly decrease the incidence of ventilator-associated pneumonia (VAP) and the overall incidence of infection in critically ill patients. However, these studies are small, largely single-center, and at risk of bias. The aim of the PROSPECT pilot trial was to determine the feasibility of conducting a larger trial of probiotics to prevent VAP in mechanically ventilated patients in the intensive care unit (ICU)...
2016: Trials
Hanne L P Tytgat, Geert Schoofs, Jos Vanderleyden, Els J M Van Damme, Ruddy Wattiez, Sarah Lebeer, Baptiste Leroy
Glycoproteins form an interesting class of macromolecules involved in bacterial-host interactions, but they are not yet widely explored in Gram-positive and beneficial species. Here, an integrated and widely applicable approach was followed to identify putative bacterial glycoproteins, combining proteome fractionation with 2D protein and glycostained gels and lectin blots. This approach was validated for the microbiota isolate Lactobacillus rhamnosus GG. The approach resulted in a list of putative glycosylated proteins receiving a 'glycosylation score'...
2016: Journal of Molecular Microbiology and Biotechnology
Maria A Johansson, Sophia Björkander, Manuel Mata Forsberg, Khaleda Rahman Qazi, Maria Salvany Celades, Julia Bittmann, Matthias Eberl, Eva Sverremark-Ekström
Lactobacilli are probiotic commensal bacteria and potent modulators of immunity. When present in the gut or supplemented as probiotics, they beneficially modulate ex vivo immune responsiveness. Further, factors derived from several lactobacilli strains act immune regulatory in vitro. In contrast, Staphylococcus aureus (S. aureus) is known to induce excessive T cell activation. In this study, we aimed to investigate S. aureus-induced activation of human mucosal-associated invariant T cells (MAIT cells), γδ T cells, NK cells, as well as of conventional CD4(+) and CD8(+) T cells in vitro...
2016: Frontiers in Immunology
Anastasia N Vlasova, Lulu Shao, Sukumar Kandasamy, David D Fischer, Abdul Rauf, Stephanie N Langel, Kuldeep S Chattha, Anand Kumar, Huang-Chi Huang, Gireesh Rajashekara, Linda J Saif
Lactobacillus rhamnosus GG (LGG), a gram-positive lactic acid bacterium, is one of the most widely used probiotics; while fewer gram-negative probiotics including Escherichia coli Nissle 1917 (EcN) are characterized. A mechanistic understanding of their individual and interactive effects on human rotavirus (HRV) and immunity is lacking. In this study, noncolonized, EcN-, LGG-, and EcN + LGG-colonized neonatal gnotobiotic (Gn) pigs were challenged with HRV. EcN colonization is associated with a greater protection against HRV, and induces the highest frequencies of plasmacytoid dendritic cells (pDCs), significantly increased NK-cell function and decreased frequencies of apoptotic and TLR4(+) mononuclear cells (MNCs)...
October 2016: European Journal of Immunology
Yaser Gamallat, Abdo Meyiah, Eugene D Kuugbee, Ahmed Musa Hago, Gift Chiwala, Annoor Awadasseid, Djibril Bamba, Xin Zhang, Xueqi Shang, Fuwen Luo, Yi Xin
BACKGROUND/AIM: Probiotics have been suggested as prophylactic measure in colon carcinogenesis. This study aimed at determining the potential prophylactic activity of Lactobacillus rhamnosus GG CGMCC 1.2134 (LGG) strain on colorectal carcinogenesis via measuring its effect on Nuclear factor kappa B (NFκB) inflammatory pathway and apoptosis. MATERIALS AND METHODS: 64 Sprague Dawley rats were grouped into four as follows; Group 1 (Healthy control), Group 2 (LGG), Group 3 (cancer control Dimethyl hydrazine (DMH)) and Group 4 (LGG+DMH)...
July 19, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Hanne L P Tytgat, François P Douillard, Justus Reunanen, Pia Rasinkangas, Antoni P A Hendrickx, Pia K Laine, Lars Paulin, Reetta Satokari, Willem M de Vos
UNLABELLED: Vancomycin-resistant enterococci (VRE) have become a major nosocomial threat. Enterococcus faecium is of special concern, as it can easily acquire new antibiotic resistances and is an excellent colonizer of the human intestinal tract. Several clinical studies have explored the potential use of beneficial bacteria to weed out opportunistic pathogens. Specifically, the widely studied Lactobacillus rhamnosus strain GG has been applied successfully in the context of VRE infections...
October 1, 2016: Applied and Environmental Microbiology
Juan Wang, Song Huang, Nan Fu, Romain Jeantet, Xiao Dong Chen
Probiotic bacteria have been reported to confer benefits on hosts when delivered in an adequate dose. Spray-drying is expected to produce dried and microencapsulated probiotic products due to its low production cost and high energy efficiency. The bottleneck in probiotic application addresses the thermal and dehydration-related inactivation of bacteria during process. A protective drying matrix was designed by modifying skim milk with the principle of calcium-induced protein thermal aggregation. The well-defined single-droplet drying technique was used to monitor the droplet-particle conversion and the protective effect of this modified Ca-aggregated milk on Lactobacillus rhamnosus GG...
August 3, 2016: Journal of Agricultural and Food Chemistry
Julian F Guest, Diana Weidlich, Maciej Kaczmarski, Elzbieta Jarocka-Cyrta, Natalia Kobelska-Dubiel, Agnieszka Krauze, Iwona Sakowska-Maliszewska, Anna Zawadzka-Krajewska
OBJECTIVE: To estimate the cost-effectiveness of using an extensively hydrolyzed casein formula (eHCF) containing the probiotic Lactobacillus rhamnosus GG (eHCF + LGG; Nutramigen LGG) as an initial treatment for cow's milk allergy compared with eHCF alone and amino acid formulas (AAF) in Poland from the perspective of the Polish National Health Fund (Narodowy Fundusz Zdrowia [NFZ]) and parents. METHODS: Decision modeling was used to estimate the probability of cow's milk allergic infants developing tolerance to cow's milk by 18 months...
2016: ClinicoEconomics and Outcomes Research: CEOR
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