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Gut, microbiota, bacteria, probiotics

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https://www.readbyqxmd.com/read/29341125/gut-microbiota-and-probiotics-novel-immune-system-modulators-in-myasthenia-gravis
#1
REVIEW
Elena Rinaldi, Alessandra Consonni, Elena Guidesi, Marina Elli, Renato Mantegazza, Fulvio Baggi
Gut microorganisms (microbiota) live in symbiosis with the host and influence human nutrition, metabolism, physiology, and immune development and function. The microbiota prevents pathogen infection to the host, and in turn the host provides a niche for survival. The alteration of gut bacteria composition (dysbiosis) could contribute to the development of immune-mediated diseases by influencing the immune system activation and driving the pro- and anti-inflammatory responses in order to promote or counteract immune reactions...
January 17, 2018: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/29336590/modern-perspectives-on-the-health-benefits-of-kefir-in-next-generation-sequencing-era-improvement-of-the-host-gut-microbiota
#2
Dong-Hyeon Kim, Dana Jeong, Hyunsook Kim, Kun-Ho Seo
Kefir is a natural complex fermented milk product containing more than 50 species of probiotic bacteria and yeast, and has been demonstrated to have multiple properties conferring health benefits, including antiobesity, anti-hepatic steatosis, antioxidative, antiallergenic, antitumor, anti-inflammatory, cholesterol-lowering, constipation-alleviating, and antimicrobial properties. To better understand the underlying mechanisms of these benefits, we here review research on the effect of kefir (and kefir microorganisms) consumption to modulate the host gut microbiota...
January 16, 2018: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29324833/evidence-for-pmat-and-oct-like-biogenic-amine-transporters-in-a-probiotic-strain-of-lactobacillus-implications-for-interkingdom-communication-within-the-microbiota-gut-brain-axis
#3
Mark Lyte, David R Brown
The ability of prokaryotic microbes to produce and respond to neurochemicals that are more often associated with eukaryotic systems is increasingly recognized through the concept of microbial endocrinology. Most studies have described the phenomena of neurochemical production by bacteria, but there remains an incomplete understanding of the mechanisms by which microbe- or host-derived neuroactive substances can be recognized by bacteria. Based on the evolutionary origins of eukaryotic solute carrier transporters, we hypothesized that bacteria may possess an analogous uptake function for neuroactive biogenic amines...
2018: PloS One
https://www.readbyqxmd.com/read/29315980/probiotics-or-pro-healers-the-role-of-beneficial-bacteria-in-tissue-repair
#4
Jovanka Lukic, Vivien Chen, Ivana Strahinic, Jelena Begovic, Hadar Lev-Tov, Stephen C Davis, Marjana Tomic-Canic, Irena Pastar
Probiotics are beneficial microorganisms, known to exert numerous positive effects on human health, primarily in the battle against pathogens. Probiotics have been associated with improved healing of intestinal ulcers, and healing of infected cutaneous wounds. This manuscript reviews the latest findings on probiotics related to their pro-healing properties on gut epithelium and skin. Proven mechanisms by which probiotic bacteria exert their beneficial effects include direct killing of pathogens, competitive displacement of pathogenic bacteria, reinforcement of epithelial barrier, induction of fibroblasts and epithelial cells' migration and function...
January 8, 2018: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/29314490/a-mixture-of-lactobacillus-species-isolated-from-traditional-fermented-foods-promote-recovery-from-antibiotic-induced-intestinal-disruption-in-mice
#5
Ying Shi, Xi Zhao, Zhao Jianxin, Zhang Hao, Qixiao Zhai, Arjan Narbad, Wei Chen
AIMS: This study evaluated the antibiotic-induced changes in microbial ecology, intestinal dysbiosis and low-grade inflammation; and the combined effect of four different Lactobacillus species on recovery of microbiota composition and improvement of gut barrier function in mice. METHODS AND RESULTS: Administration of the antibiotic ampicillin for 2 weeks decreased microbial community diversity, induced caecum tumefaction and increased gut permeability in mice. Application of a probiotic cocktail of four Lactobacillus species (JUP-Y4) modulated the microbiota community structure and promoted the abundance of potentially beneficial bacteria such as Akkermansia...
January 3, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29290650/structural-shift-of-gut-microbiota-during-chemo-preventive-effects-of-epigallocatechin-gallate-on-colorectal-carcinogenesis-in-mice
#6
Xin Wang, Tao Ye, Wen-Jie Chen, You Lv, Zong Hao, Jun Chen, Jia-Ying Zhao, Hui-Peng Wang, Yuan-Kun Cai
AIM: To investigate the effect of epigallocatechin gallate (EGCG) on structural changes of gut microbiota in colorectal carcinogenesis. METHODS: An azoxymethane (AOM)/dextran sodium sulfate (DSS)-induced colitis mouse model was established. Forty-two female FVB/N mice were randomly divided into the following three groups: group 1 (10 mice, negative control) was treated with vehicle, group 2 (16 mice, positive control) was treated with AOM plus vehicle, and group 3 (16 mice, EG) was treated with AOM plus EGCG...
December 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29286343/microbial-regulation-of-glucose-metabolism-and-insulin-resistance
#7
REVIEW
Silke Crommen, Marie-Christine Simon
Type 2 diabetes is a combined disease, resulting from a hyperglycemia and peripheral and hepatic insulin resistance. Recent data suggest that the gut microbiota is involved in diabetes development, altering metabolic processes including glucose and fatty acid metabolism. Thus, type 2 diabetes patients show a microbial dysbiosis, with reduced butyrate-producing bacteria and elevated potential pathogens compared to metabolically healthy individuals. Furthermore, probiotics are a known tool to modulate the microbiota, having a therapeutic potential...
December 29, 2017: Genes
https://www.readbyqxmd.com/read/29279259/change-in-gut-microbiota-for-eczema-implications-for-novel-therapeutic-strategies
#8
REVIEW
Y Kang, Y Cai, W Pan
Eczema is one of the most common inflammatory diseases, often constituting a lifelong burden for afflicted individuals. The complex interaction of host genetic and multiple environmental factors contribute to its pathogenesis. A relationship between maladjustment of gut microbiota and eczema has been brought into the light of day in most previous studies. In eczema preclinical models, specific intestinal microbial species have been demonstrated to prohibit or dwindle immune responsiveness, indicating that these strains among commensal gut bacteria may exert either a morbific or phylactic function in eczema progression...
December 23, 2017: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/29250559/beta-defensin-2-and-beta-defensin-3-reduce-intestinal-damage-caused-by-salmonella-typhimurium-modulating-the-expression-of-cytokines-and-enhancing-the-probiotic-activity-of-enterococcus-faecium
#9
Alessandra Fusco, Vittoria Savio, Marcella Cammarota, Alberto Alfano, Chiara Schiraldi, Giovanna Donnarumma
The intestinal microbiota is a major factor in human health and disease. This microbial community includes autochthonous (permanent inhabitants) and allochthonous (transient inhabitants) microorganisms that contribute to maintaining the integrity of the intestinal wall, modulating responses to pathogenic noxae and representing a key factor in the maturation of the immune system. If this healthy microbiota is disrupted by antibiotics, chemotherapy, or a change in diet, intestinal colonization by pathogenic bacteria or viruses may occur, leading to disease...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/29248229/breastfeeding-associated-microbiota-in-human-milk-following-supplementation-with-lactobacillus-rhamnosus-gg-lactobacillus-acidophilus-la-5-and-bifidobacterium-animalis-subspecies-lactis-bb-12
#10
Melanie Rae Simpson, Ekaterina Avershina, Ola Storrø, Roar Johnsen, Knut Rudi, Torbjørn Øien
Breastfeeding is one of the major factors affecting the early development of the infant gut microbiota, and weaning is associated with a shift in the gut microbiota toward a more adult composition. Through breastfeeding, infants receive bioactive components that shape their microbiota while also being exposed to the breast milk and breast surface microbial communities. Recent studies have suggested the possibility of an entero-mammary route of microbial transfer, opening the possibility of infant gut microbiota modulation through maternal probiotic supplementation...
December 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29234140/altered-gut-microbiota-profiles-in-sows-and-neonatal-piglets-associated-with-porcine-epidemic-diarrhea-virus-infection
#11
Deping Song, Qi Peng, Yanjun Chen, Xinrong Zhou, Fanfan Zhang, Anqi Li, Dongyan Huang, Qiong Wu, Yu Ye, Houjun He, Leyi Wang, Yuxin Tang
Porcine epidemic diarrhea virus (PEDV) is a devastating cause of diarrhea in pigs worldwide. Most of studies have focused on molecular and pathogenic characterization of PEDV, whereas there were limited studies in understanding the role of gut microbiota (GM) in viral-associated diarrhea. Here, using the Illumina MiSeq platform, we examined and compared the impact of PEDV infection on the GM of sows and their piglets less than 10 days old. Our results showed that PEDV caused alternations in the structure and abundance of GM from levels of phylum to genus, and even species...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29233677/alzheimer-s-disease-and-gut-microbiota-modifications-the-long-way-between-preclinical-studies-and-clinical-evidence
#12
REVIEW
Cesare Mancuso, Rosaria Santangelo
Recent studies have suggested the role of an infectious component in the pathogenesis of Alzheimer's disease (AD). In light of this, research has focused on some bacteria constituting the intestinal microbial flora which can produce amyloid. Once generated, the latter hypothetically triggers a systemic inflammatory response which compromises complex brain functions, such as learning and memory. Clinical studies have shown that, in cognitively impaired elderly patients with brain amyloidosis, there is lower abundance in the gut of E...
December 9, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29232848/a-metagenomic-and-in-silico-functional-prediction-of-gut-microbiota-profiles-may-concur-in-discovering-new-cystic-fibrosis-patient-targeted-probiotics
#13
Pamela Vernocchi, Federica Del Chierico, Andrea Quagliariello, Danilo Ercolini, Vincenzina Lucidi, Lorenza Putignani
Cystic fibrosis (CF) is a life-limiting hereditary disorder that results in aberrant mucosa in the lungs and digestive tract, chronic respiratory infections, chronic inflammation, and the need for repeated antibiotic treatments. Probiotics have been demonstrated to improve the quality of life of CF patients. We investigated the distribution of gut microbiota (GM) bacteria to identify new potential probiotics for CF patients on the basis of GM patterns. Fecal samples of 28 CF patients and 31 healthy controls (HC) were collected and analyzed by 16S rRNA-based pyrosequencing analysis of GM, to produce CF-HC paired maps of the distribution of operational taxonomic units (OTUs), and by Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) for Kyoto Encyclopedia of Genes and Genomes (KEGG) biomarker prediction...
December 9, 2017: Nutrients
https://www.readbyqxmd.com/read/29221120/gut-microbial-profile-analysis-by-miseq-sequencing-of-pancreatic-carcinoma-patients-in-china
#14
Zhigang Ren, Jianwen Jiang, Haiyang Xie, Ang Li, Haifeng Lu, Shaoyan Xu, Lin Zhou, Hua Zhang, Guangying Cui, Xinhua Chen, Yuanxing Liu, Liming Wu, Nan Qin, Ranran Sun, Wei Wang, Lanjuan Li, Weilin Wang, Shusen Zheng
Pancreatic carcinoma (PC) is a lethal cancer. Gut microbiota is associated with some risk factors of PC, e.g. obesity and types II diabetes. However, the specific gut microbial profile in clinical PC in China has never been reported. This prospective study collected 85 PC and 57 matched healthy controls (HC) to analyze microbial characteristics by MiSeq sequencing. The results showed that gut microbial diversity was decreased in PC with an unique microbial profile, which partly attributed to its decrease of alpha diversity...
November 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29218032/surface-proteins-of-lactococcus-lactis-bacterial-resources-for-muco-adhesion-in-the-gastrointestinal-tract
#15
REVIEW
Muriel Mercier-Bonin, Marie-Pierre Chapot-Chartier
Food and probiotic bacteria, in particular lactic acid bacteria, are ingested in large amounts by humans and are part of the transient microbiota which is increasingly considered to be able to impact the resident microbiota and thus possibly the host health. The lactic acid bacterium Lactococcus lactis is extensively used in starter cultures to produce dairy fermented food. Also because of a generally recognized as safe status, L. lactis has been considered as a possible vehicle to deliver in vivo therapeutic molecules with anti-inflammatory properties in the gastrointestinal tract...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29217301/-gut-microbiota-what-impact-on-colorectal-carcinogenesis-and-treatment
#16
REVIEW
Antoine Bruneau, Minh-Tam Baylatry, Anne Christine Joly, Harry Sokol
The gut microbiota, composed of 1014 microorganisms, is now considered as a "hidden organ", regarding to its digestive, metabolic and immune functions, which are helpful to its host. For the last 15 years, advances in molecular biology have highlighted the association of gut microbiota dysbiosis with several diseases, including colorectal cancer. An increased abundance of some bacteria (including Fusobacterium nucleatum, Bacteroides fragilis, Escherichia coli) is associated with cancer, whereas others seem to be protective (Faecalibacterium prausnitzii)...
December 4, 2017: Bulletin du Cancer
https://www.readbyqxmd.com/read/29209439/comparative-study-of-probiotic-effects-of-lactobacillus-and-bifidobacteria-strains-on-cholesterol-levels-liver-morphology-and-the-gut-microbiota-in-obese-mice
#17
Rostyslav V Bubnov, Lidiia P Babenko, Liudmyla M Lazarenko, Viktoria V Mokrozub, Oleksandr A Demchenko, Oleksiy V Nechypurenko, Mykola Ya Spivak
Background: Microbiome-modulating interventions are promising for treatment and prevention of metabolic syndrome. The number of probiotic strains demonstrated ability to decrease cholesterol level in vivo, however, it was poorly confirmed in a clinical setting. The aim was to study the effects of L. acidophilus IMV B-7279, L. casei IMV B-7280, B. animalіs VKL and B. animalіs VKB separately and in various compositions on the level of serum cholesterol, gut microbiota contents and liver morphology on a high-calorie-induced obesity model in BALB/c mice...
December 2017: EPMA Journal
https://www.readbyqxmd.com/read/29209314/probiotic-strain-lactobacillus-casei-bl23-prevents-colitis-associated-colorectal-cancer
#18
Elsa Jacouton, Florian Chain, Harry Sokol, Philippe Langella, Luis G Bermúdez-Humarán
The gut microbiota plays a major role in intestinal health, and an imbalance in its composition can lead to chronic gut inflammation and a predisposition to developing colorectal cancer (CRC). Currently, the use of probiotic bacteria represents an emerging alternative to treat and prevent cancer. Moreover, consumption of these beneficial bacteria may also favorably modulate the composition of the gut microbiota, which has been described in several studies to play an important role in CRC carcinogenesis. In this context, the aim of this study was to assess the protective effect of oral treatment with Lactobacillus casei BL23, a probiotic strain well known for its anti-inflammatory and anticancer properties...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29201193/effect-of-different-treatments-and-alcohol-addiction-on-gut-microbiota-in-minimal-hepatic-encephalopathy-patients
#19
Zan Zuo, Hong Fan, Xiao-Dan Tang, Yan-Min Chen, Lin-Ting Xun, Yan Li, Zheng-Ji Song, Hui-Qiong Zhai
Minimal hepatic encephalopathy (MHE) is caused by dysbiosis of gut microbiota, particularly the ammonia-producing bacteria. Given the efficacy of certain treatments on MHE and the connection between alcoholism and MHE, a thorough understanding of how these strategies affect the gut microbiota in patients (alcoholic or non-alcoholic) will facilitate the assessment of their efficacy in the reshaping of gut microbiota. In the present study, a metagenomics approach was adopted to reveal alterations in gut microbiota of 14 MHE patients following treatment with rifaximin alone or rifaximin plus probiotics...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29197069/polymethoxyflavones-prevent-benzo-a-pyrene-dextran-sodium-sulfate-induced-colorectal-carcinogenesis-through-modulating-xenobiotic-metabolism-and-ameliorate-autophagic-defect-in-icr-mice
#20
Jia-Ching Wu, Mei-Ling Tsai, Ching-Shu Lai, Chih-Yu Lo, Chi-Tang Ho, Ying-Jan Wang, Min-Hsiung Pan
Polycyclic aromatic hydrocarbons (PAHs) are widespread environmental carcinogenic pollutants and they have become an important issue in food contamination. Dietary intake of PAHs has been recognized as a major route of human exposure. However, the mechanisms behind dietary PAH-induced colorectal cancer (CRC) remain unclear. Several studies have shown that polymethoxyflavones (PMFs) are effective in preventing carcinogen-induced CRC or colitis. In this study, we investigated the preventive effect of PMFs on benzo[a]pyrene/dextran sulfate sodium (BaP/DSS)-induced colorectal tumorigenesis in ICR mice...
December 2, 2017: International Journal of Cancer. Journal International du Cancer
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