keyword
MENU ▼
Read by QxMD icon Read
search

Human gut

keyword
https://www.readbyqxmd.com/read/27932651/draft-genome-sequence-of-probiotic-lactobacillus-acidophilus-strain-l-55-isolated-from-a-healthy-human-gut
#1
Yusuke Fujii, Hidehiro Toh, Takehiro Matsubara, Shuta Tomida, Co Thi Kim Nguyen, Iyo Mimura, Shoji Nakamura, Hidetoshi Morita
Probiotic Lactobacillus acidophilus L-55 was isolated from a healthy human gut. Here, we report the draft genome sequence of this organism.
December 8, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27932218/bisphenol-a-bpa-in-the-serum-of-pet-dogs-following-short-term-consumption-of-canned-dog-food-and-potential-health-consequences-of-exposure-to-bpa
#2
Zoe L Koestel, Robert C Backus, Kaoru Tsuruta, William G Spollen, Sarah A Johnson, Angela B Javurek, Mark R Ellersieck, Charles E Wiedmeyer, Kurunthachalam Kannan, Jingchuan Xue, Nathan J Bivens, Scott A Givan, Cheryl S Rosenfeld
Bisphenol A (BPA) is a widely present endocrine disruptor chemical found in many household items. Moreover, this chemical can bioaccumulate in various terrestrial and aquatic sources; thereby ensuring continual exposure of animals and humans. For most species, including humans, diet is considered the primary route of exposure. However, there has been little investigation whether commercial-brands of dog foods contain BPA and potential health ramifications of BPA-dietary exposure in dogs. We sought to determine BPA content within dog food, whether short-term consumption of these diets increases serum concentrations of BPA, and potential health consequences, as assessed by potential hematological, serum chemistry, cortisol, DNA methylation, and gut microbiome changes, in dogs associated with short-term dietary exposure to BPA...
December 5, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27930931/deficiency-in-duox2-activity-alleviates-ileitis-in-gpx1-and-gpx2-knockout-mice-without-affecting-apoptosis-incidence-in-the-crypt-epithelium
#3
Fong-Fong Chu, R Steven Esworthy, James H Doroshow, Helmut Grasberger, Agnes Donko, Thomas L Leto, Qiang Gao, Binghui Shen
Mice deficient in glutathione peroxidase (GPx)-1 and -2 (GPx1(-/-)GPx2(-/-) double knockout or DKO mice) develop very-early-onset (VEO) ileocolitis, suggesting that lack of defense against reactive oxygen species (ROS) renders susceptibility to intestinal inflammation. Two members of ROS-generating NADPH oxidase family, NOX1 and DUOX2, are highly inducible in the intestinal epithelium. Previously, we reported that Nox1 deficiency ameliorated the pathology in DKO mice (Nox1-TKO). The role of Duox2 in ileocolitis of the DKO mice is evaluated here in Duoxa-TKO mice by breeding DKO mice with Duoxa(-/-) mice (Duoxa-TKO), which do not have Duox2 activity...
November 22, 2016: Redox Biology
https://www.readbyqxmd.com/read/27929101/hookworm-infection
#4
Alex Loukas, Peter J Hotez, David Diemert, Maria Yazdanbakhsh, James S McCarthy, Rodrigo Correa-Oliveira, John Croese, Jeffrey M Bethony
Hookworms are soil-transmitted nematode parasites that can reside for many years in the small intestine of their human hosts; Necator americanus is the predominant infecting species. Adult worms feed on the blood of a host and can cause iron deficiency anaemia, especially in high-risk populations (children and women of childbearing age). Almost 500 million people in developing tropical countries are infected, and simulation models estimate that hookworm infection is responsible for >4 million disability-adjusted life years lost annually...
December 8, 2016: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/27928878/formation-of-propionate-and-butyrate-by-the-human-colonic-microbiota
#5
REVIEW
Petra Louis, Harry J Flint
The human gut microbiota ferments dietary non-digestible carbohydrates into short-chain fatty acids (SCFA). These microbial products are utilized by the host and propionate and butyrate in particular exert a range of health-promoting functions. Here an overview of the metabolic pathways utilized by gut microbes to produce these two SCFA from dietary carbohydrates and from amino acids resulting from protein breakdown is provided. This overview emphasizes the important role played by cross-feeding of intermediary metabolites (in particular lactate, succinate and 1,2-propanediol) between different gut bacteria...
November 5, 2016: Environmental Microbiology
https://www.readbyqxmd.com/read/27928019/tlr2-ligation-enhances-hiv-1-replication-in-activated-ccr6-cd4-t-cells-by-increasing-virus-entry-and-establishing-a-more-permissive-environment-to-infection
#6
Jean-François Bolduc, Michel Ouellet, Laurent Hany, Michel J Tremblay
: In this study, we investigated the effect of TLR2 ligation on the permissiveness of activated CD4(+) T cells to HIV-1 infection by focusing our experiments on the relative susceptibility of cell subsets based on their expression of CCR6. Purified primary human CD4(+) T cells were first subjected to a CD3/CD28 costimulation before treatment with the TLR2 agonist Pam3CSK4. Finally, cells were inoculated with R5-tropic HIV-1 particles that permit to study the effect of TLR2 triggering on virus production at both population and single-cell levels...
December 7, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27925245/helminths-hygiene-hypothesis-and-type-2-diabetes
#7
Karin de Ruiter, Dicky L Tahapary, Erliyani Sartono, Pradana Soewondo, Taniawati Supali, Johannes W A Smit, Maria Yazdanbakhsh
Worldwide, there is little overlap between the prevalence of soil-transmitted helminths and type 2 diabetes (T2D). Helminth-induced type 2 immune responses and immune regulatory network might modulate the obesity-induced activation of inflammatory pathways that are associated with the development of insulin resistance, a strong predictor of the development of T2D. However, other factors such as helminth-associated changes in adiposity and gut microbiome might also contribute to improved metabolic outcomes. In this review we summarize epidemiological evidence for the link between helminths and T2D and discuss the potential mechanisms, based on findings from experimental studies as well as the limited number of studies in humans...
December 7, 2016: Parasite Immunology
https://www.readbyqxmd.com/read/27924951/assessment-of-virulence-potential-of-uncharacterized-enterococcus-faecalis-strains-using-pan-genomic-approach-identification-of-pathogen-specific-and-habitat-specific-genes
#8
Utpal Bakshi, Munmun Sarkar, Sandip Paul, Chitra Dutta
Enterococcus faecalis, a leading nosocomial pathogen and yet a prominent member of gut microbiome, lacks clear demarcation between pathogenic and non-pathogenic strains at genome level. Here we present the comparative genome analysis of 36 E. faecalis strains with different pathogenic features and from different body-habitats. This study begins by addressing the genome dynamics, which shows that the pan-genome of E. faecalis is still open, though the core genome is nearly saturated. We identified eight uncharacterized strains as potential pathogens on the basis of their co-segregation with reported pathogens in gene presence-absence matrix and Pathogenicity Island (PAI) distribution...
December 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27924811/insights-into-the-evolution-of-pathogenicity-of-escherichia-coli-from-genomic-analysis-of-intestinal-e-coli-of-marmota-himalayana-in-qinghai-tibet-plateau-of-china
#9
Shan Lu, Dong Jin, Shusheng Wu, Jing Yang, Ruiting Lan, Xiangning Bai, Sha Liu, Qiong Meng, Xuejiao Yuan, Juan Zhou, Ji Pu, Qiang Chen, Hang Dai, Yuanyuan Hu, Yanwen Xiong, Changyun Ye, Jianguo Xu
Escherichia coli is both of a widespread harmless gut commensal and a versatile pathogen of humans. Domestic animals are a well-known reservoir for pathogenic E. coli. However, studies of E. coli populations from wild animals that have been separated from human activities had been very limited. Here we obtained 580 isolates from intestinal contents of 116 wild Marmot Marmota himalayana from Qinghai-Tibet plateau, China, with five isolates per animal. We selected 125 (hereinafter referred to as strains) from the 580 isolates for genome sequencing, based on unique pulse field gel electrophoresis patterns and at least one isolate per animal...
December 7, 2016: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/27924435/antibiotic-resistance-is-linked-to-carriage-of-papc-and-iuta-virulence-genes-and-phylogenetic-group-d-background-in-commensal-and-uropathogenic-escherichia-coli-from-infants-and-young-children
#10
N Karami, A E Wold, I Adlerberth
P fimbriae, enabling adherence to colonic and urinary epithelium, and aerobactin, an iron sequestering system, are both colonization factors in the human colon and virulence factors for urinary tract infection. The colonic microbiota is suggested to be a site suitable for the transfer of antibiotic resistance genes. We investigated whether phenotypic resistance to antibiotics in commensal and uropathogenic Escherichia coli from infants and young children is associated with carriage of virulence genes and to phylogenetic group origin and, in the case of fecal strains, to persistence in the gut and fecal population levels...
December 6, 2016: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/27924137/exercise-induced-stress-behavior-gut-microbiota-brain-axis-and-diet-a-systematic-review-for-athletes
#11
REVIEW
Allison Clark, Núria Mach
Fatigue, mood disturbances, under performance and gastrointestinal distress are common among athletes during training and competition. The psychosocial and physical demands during intense exercise can initiate a stress response activating the sympathetic-adrenomedullary and hypothalamus-pituitary-adrenal (HPA) axes, resulting in the release of stress and catabolic hormones, inflammatory cytokines and microbial molecules. The gut is home to trillions of microorganisms that have fundamental roles in many aspects of human biology, including metabolism, endocrine, neuronal and immune function...
2016: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/27923925/biliary-secretion-of-quasi-enveloped-human-hepatitis-a-virus
#12
Asuka Hirai-Yuki, Lucinda Hensley, Jason K Whitmire, Stanley M Lemon
: Hepatitis A virus (HAV) is an unusual picornavirus that is released from cells cloaked in host-derived membranes. These quasi-enveloped virions (eHAV) are the only particle type circulating in blood during infection, whereas only nonenveloped virions are shed in feces. The reason for this is uncertain. Hepatocytes, the only cell type known to support HAV replication in vivo, are highly polarized epithelial cells with basolateral membranes facing onto hepatic (blood) sinusoids and apical membranes abutting biliary canaliculi from which bile is secreted to the gut...
December 6, 2016: MBio
https://www.readbyqxmd.com/read/27923575/scaling-methane-emissions-in-ruminants-and-global-estimates-in-wild-populations
#13
F J Pérez-Barbería
Methane (CH4) emissions by human activities have more than doubled since the 1700s, and they contribute to global warming. One of the sources of CH4 is produced by incomplete oxidation of feed in the ruminant's gut. Domestic ruminants produce most of the emissions from animal sources, but emissions by wild ruminants have been poorly estimated. This study (i) scales CH4 against body mass in 503 experiments in ruminants fed herbage, and assesses the effect of different sources of variation, using published and new data; and (ii) it uses these models to produce global estimates of CH4 emissions from wild ruminants...
December 3, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27922070/deep-sequencing-of-the-16s-ribosomal-rna-of-the-neonatal-oral-microbiome-a-comparison-of-breast-fed-and-formula-fed-infants
#14
S S Al-Shehri, E L Sweeney, D M Cowley, H G Liley, P D Ranasinghe, B G Charles, P N Shaw, D Vagenas, J A Duley, C L Knox
In utero and upon delivery, neonates are exposed to a wide array of microorganisms from various sources, including maternal bacteria. Prior studies have proposed that the mode of feeding shapes the gut microbiota and, subsequently the child's health. However, the effect of the mode of feeding and its influence on the development of the neonatal oral microbiota in early infancy has not yet been reported. The aim of this study was to compare the oral microbiota of healthy infants that were exclusively breast-fed or formula-fed using 16S-rRNA gene sequencing...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27921366/masked-trichothecene-and-zearalenone-mycotoxins-withstand-digestion-and-absorption-in-the-upper-gi-tract-but-are-efficiently-hydrolyzed-by-human-gut-microbiota-in-vitro
#15
Silvia W Gratz, Reshma Dinesh, Tomoya Yoshinari, Grietje Holtrop, Anthony J Richardson, Gary Duncan, Susan MacDonald, Antony Lloyd, Jonathan Tarbin
SCOPE: Cereal grains are commonly contaminated with Fusarium mycotoxins and their plant-derived masked metabolites. The fate of masked mycotoxins in the human gut is poorly understood. Here we assess the metabolism and transport of glucoside metabolites of common trichothecenes (deoxynivalenol, nivalenol, T-2 toxin) and zearalenone compounds (zearalenone, α- and β-zearalenol) in the human gut in vitro. METHODS AND RESULTS: Masked mycotoxins were incubated with artificial digestive juices and absorption was assessed in differentiated Caco-2/TC7 cells...
December 6, 2016: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/27920774/effects-of-tween-80-on-growth-and-biofilm-formation-in-laboratory-media
#16
Christina K Nielsen, Jørgen Kjems, Tina Mygind, Torben Snabe, Rikke L Meyer
Tween 80 is a widely used non-ionic emulsifier that is added to cosmetics, pharmaceuticals, and foods. Because of its widespread use we need to understand how it affects bacteria on our skin, in our gut, and in food products. The aim of this study is to investigate how Tween 80 affects the growth and antimicrobial susceptibility of Staphylococcus aureus, Listeria monocytogenes, and Pseudomonas fluorescens, which are common causes of spoilage and foodborne illnesses. Addition of 0.1% Tween 80 to laboratory growth media increased the growth rate of planktonic S...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27918411/potential-of-lactobacillus-plantarum-ccfm639-in-protecting-against-aluminum-toxicity-mediated-by-intestinal-barrier-function-and-oxidative-stress
#17
Leilei Yu, Qixiao Zhai, Fengwei Tian, Xiaoming Liu, Gang Wang, Jianxin Zhao, Hao Zhang, Arjan Narbad, Wei Chen
Aluminum (Al) is a ubiquitous metal that can seriously harm the health of animals and humans. In our previous study, we demonstrated that Lactobacillus plantarum CCFM639 can decrease Al burden in the tissues of mice by inhibiting intestinal Al absorption. The main aim of the present research was to investigate whether the protection by the strain is also associated with enhancement of the intestinal barrier, alleviation of oxidative stress and modulation of the inflammatory response. In an in vitro cell model, two protection modes (intervention and therapy) were examined and the results indicated that L...
December 2, 2016: Nutrients
https://www.readbyqxmd.com/read/27916707/rethinking-diet-to-aid-human-microbe-symbiosis
#18
REVIEW
Muriel Derrien, Patrick Veiga
The spread of the Western lifestyle has been accompanied by microbial changes thought to underlie the emergence of chronic, nontransmissible, immune-related diseases. The past decade has seen the unprecedented development of therapies for 'replenishing' the microbiota of sick individuals. However, functional and ecological solutions helping the host and the gut microbiota to cope with the ecological stressors of modern life are still lacking. In this review, we discuss how recent advances in gut microbiome science are leading to the identification of microbe-derived and health-relevant metabolites...
October 26, 2016: Trends in Microbiology
https://www.readbyqxmd.com/read/27914860/microplastics-ingestion-by-a-common-tropical-freshwater-fishing-resource
#19
Jacqueline Santos Silva-Cavalcanti, José Diego B Silva, Elton José de França, Maria Christina Barbosa de Araújo, Felipe Gusmão
Microplastics pollution is widespread in marine ecosystems and a major threat to biodiversity. Nevertheless, our knowledge of the impacts of microplastics in freshwater environments and biota is still very limited. The interaction of microplastics with freshwater organisms and the risks associated with the human consumption of organisms that ingested microplastics remain major knowledge gaps. In this study, we assessed the ingestion of microplastics by Hoplosternum littorale, a common freshwater fish heavily consumed by humans in semi-arid regions of South America...
November 30, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27914813/normal-human-gingival-fibroblasts-undergo-cytostasis-and-apoptosis-after-long-term-exposure-to-butyric-acid
#20
Michihiro Shirasugi, Keisuke Nishioka, Toshiro Yamamoto, Takaaki Nakaya, Narisato Kanamura
The causes of periodontal disease are complex. Butyric acid, a metabolite of periodontopathic bacteria such as Porphyromonas gingivalis, acts as a histone deacetylase inhibitor that has a direct effect on mRNA expression. Butyric acid produced by Clostridium butyricum in the intestinal tract induces differentiation of regulatory T cells, thereby suppressing inflammation in the gut. Mice lacking Clostridium butyricum in the intestinal tract suffer from colitis. By contrast, butyric acid in the oral cavity worsens periodontal disease...
November 30, 2016: Biochemical and Biophysical Research Communications
keyword
keyword
106762
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"