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Intestinal barrier function

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https://www.readbyqxmd.com/read/29782463/gut-microbiota-probiotics-and-sport-from-clinical-evidence-to-agonistic-performance
#1
Marco Pane, Angela Amoruso, Francesca Deidda, Teresa Graziano, Serena Allesina, Luca Mogna
Human beings harbor clusters of bacteria in different parts of the body, such as the surface or the deep layers of the skin, the mouth, the lungs, the intestine, the vagina, and all the surfaces exposed to the outer world. The majority of microbes resides in the gut, have a weighty influence on human physiology and nutrition and are vital for human life. There is growing evidence showing that the gut microbiota plays important roles in the maturation of the immune system and the protection against some infectious agents...
May 18, 2018: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/29778525/mucus-penetrating-nanoparticles-promising-drug-delivery-systems-for-the-photodynamic-therapy-of-intestinal-cancer
#2
Juliane Anderski, Laura Mahlert, Dennis Mulac, Klaus Langer
Photodynamic therapy (PDT) is an auspicious therapy approach for the treatment of cancer. Despite its numerous benefits, the drug delivery of the used photosensitizer (PS) to target locations inside the human body remains a main therapy challenge, since the standard intravenous PS injection often causes systemic side-effects. To circumvent this therapy drawback, the oral application represents a promising administration alternative. Especially for the treatment of intestinal cancer it offers the possibility of a local treatment with a reduced likelihood for adverse drug reactions...
May 17, 2018: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29777169/difructose-dianhydride-improves-intestinal-calcium-absorption-wound-healing-and-barrier-function
#3
Sang In Lee, In Ho Kim
The gastrointestinal tract (GIT) is critical for nutrient absorption and is an important barrier against harmful pathogens and antigens. Difructose anhydrides (DFA)-IVs are nondigestible disaccharides that enhance calcium and iron absorption by affecting the intestinal epithelial tissue. However, their effects on intestinal functions are not fully understood. In this study, we performed a feeding trial and found that dietary DFA-IVs improved growth performance, relative breast muscle and liver weight, and digestibility and blood calcium and iron concentrations in broilers...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29777024/characterization-of-p-glycoprotein-humanized-mice-generated-by-chromosome-engineering-technology-its-utility-for-prediction-of-drug-distribution-to-the-brain-in-humans
#4
Yuki Yamasaki, Kaoru Kobayashi, Fuka Okuya, Naoyo Kajitani, Kanako Kazuki, Satoshi Abe, Shoko Takehara, Shingo Ito, Seiryo Ogata, Tatsuki Uemura, Sumio Ohtsuki, Genki Minegishi, Hidetaka Akita, Kan Chiba, Mitsuo Oshimura, Yasuhiro Kazuki
P-glycoprotein (P-gp), encoded by the MDR1 gene in humans and by the Mdr1a/1b genes in rodents, is expressed in numerous tissues and plays as an efflux pump to limit the distribution and absorption of many drugs. Owing to species differences of P-gp between humans and rodents, it is difficult to predict the impact of P-gp on pharmacokinetics and tissue distribution of P-gp substrates in humans from results of animal experiments. Therefore, we generated a novel P-gp humanized mouse model by using a mouse artificial chromosome (MAC) vector [designated human MDR1-MAC (hMDR1-MAC) mice]...
May 18, 2018: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/29773105/-protective-role-of-green-tea-polyphenols-in-intestinal-mucosal-barrier-function-of-mice-with-colitis-induced-by-tnbs-through-inhibiting-jak2-stat3-pathway
#5
Jin Xi, Sitang Ge, Lugen Zuo, Yuke Zhu, Lian Wang, Qiaoli Xie
Objective To analyze the therapeutic effect of green tea polyphenols (GTP) in mice with colitis induced by TNBS and its possible mechanism. Methods Colitis was induced by TNBS in BALB/C mice. The mice were randomly divided into GTP group (n=10) and TNBS model group (n=10). Mice in the GTP group were given GTP [0.2 mL at a dose level of 100 mg/(kg.d)] by oral gavage, and mice in the model group were given normal saline [0.2 ml/d] by gavage. Four weeks later, the mice were sacrificed. Disease activity index (DAI) and inflammatory score were evaluated by HE staining...
March 2018: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/29770758/dietary-l-threonine-supplementation-attenuates-lipopolysaccharide-induced-inflammatory-responses-and-intestinal-barrier-damage-of-broiler-chickens-at-an-early-age
#6
Yueping Chen, Hao Zhang, Yefei Cheng, Yue Li, Chao Wen, Yanmin Zhou
This study was conducted to investigate the protective effects of l-threonine (l-Thr) supplementation on growth performance, inflammatory responses and intestinal barrier function of young broilers challenged with lipopolysaccharide (LPS). A total of 144 1-d-old male chicks were allocated to one of three treatments: non-challenged broilers fed a basal diet (control group), LPS-challenged broilers fed a basal diet without l-Thr supplementation and LPS-challenged broilers fed a basal diet supplemented with 3·0 g/kg l-Thr...
June 2018: British Journal of Nutrition
https://www.readbyqxmd.com/read/29770393/consumption-of-pomegranate-decreases-plasma-lipopolysaccharide-binding-protein-levels-a-marker-of-metabolic-endotoxemia-in-patients-with-newly-diagnosed-colorectal-cancer-a-randomized-controlled-clinical-trial
#7
A González-Sarrías, M A Núñez-Sánchez, M A Ávila-Gálvez, T Monedero-Saiz, F J Rodríguez-Gil, Francisco Martínez-Díaz, M V Selma, J C Espín
Gut microbiota dysbiosis alters the intestinal barrier function, increases plasma lipopolysaccharide (LPS) levels, which promotes endotoxemia, and contributes to the onset and development of colorectal cancer (CRC). We report here for the first time the reduction of plasma LPS-binding protein (LBP) levels, a marker of endotoxemia, after pomegranate consumption in newly diagnosed CRC patients.
May 17, 2018: Food & Function
https://www.readbyqxmd.com/read/29769466/-intestinal-m-cells-contribute-to-the-maintenance-of-mucosal-barrier-functions-and-immune-homeostasis
#8
Narumi Ishihara, Nobuhide Kobayashi, Koji Hase
No abstract text is available yet for this article.
2018: Arerugī, [Allergy]
https://www.readbyqxmd.com/read/29767728/andecaliximab-anti-matrix-metalloproteinase-9-induction-therapy-for-ulcerative-colitis-a-randomised-double-blind-placebo-controlled-phase-2-3-study-in-patients-with-moderate-to-severe-disease
#9
William J Sandborn, Bal R Bhandari, Charles Randall, Ziad H Younes, Tomasz Romanczyk, Yan Xin, Emily Wendt, Hao Chai, Matt McKevitt, Sally Zhao, John S Sundy, Satish Keshav, Silvio Danese
Background and Aims: Matrix metalloproteinase-9 [MMP9] is implicated in the pathogenesis of ulcerative colitis [UC] via disruption of intestinal barrier integrity and function. A phase 2/3 combined trial was designed to examine the efficacy, safety, and pharmacokinetics of the anti-MMP9 antibody, andecaliximab [formerly GS-5745], in patients with moderately to severely active UC. Methods: Patients were randomised [1:1:1] to receive placebo, 150 mg andecaliximab every 2 weeks [Q2W], or 150 mg andecaliximab weekly [QW], via subcutaneous administration...
May 14, 2018: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/29767727/effects-of-long-term-intake-of-a-yogurt-fermented-with-lactobacillus-delbrueckii-subsp-bulgaricus-2038-and-streptococcus-thermophilus-1131-on-mice
#10
Yuki Usui, Yasumasa Kimura, Takeshi Satoh, Naoki Takemura, Yasuo Ouchi, Hiroko Ohmiya, Kyosuke Kobayashi, Hiromi Suzuki, Satomi Koyama, Satoko Hagiwara, Hirotoshi Tanaka, Seiya Imoto, Gérard Eberl, Yukio Asami, Kosuke Fujimoto, Satoshi Uematsu
The gut is an extremely complicated ecosystem where microorganisms, nutrients and host cells interact vigorously. Although the function of the intestine and its barrier system weakens with age, some probiotics can potentially prevent age-related intestinal dysfunction. Lactobacillus delbrueckii subsp. bulgaricus 2038 and Streptococcus thermophilus 1131, which are the constituents of LB81 yogurt, are representative probiotics. However, it is unclear whether their long-term intake has a beneficial influence on systemic function...
May 15, 2018: International Immunology
https://www.readbyqxmd.com/read/29767701/microbiome-mediated-effects-of-the-mediterranean-diet-on-inflammation
#11
Melisa A Bailey, Hannah D Holscher
The Mediterranean diet pattern is increasingly associated with improved metabolic health. Two mechanisms by which consuming a Mediterranean diet pattern may contribute to improved metabolic health are modulation of the gastrointestinal (GI) microbiota and reduction of metabolic endotoxemia. Metabolic endotoxemia, defined as a 2- to 3-fold increase in circulating levels of bacterial endotoxin, has been proposed as a cause of inflammation during metabolic dysfunction. As the largest source of endotoxins in the human body, the GI microbiota represents a crucial area for research on strategies for reducing endotoxemia...
May 1, 2018: Advances in Nutrition
https://www.readbyqxmd.com/read/29766204/adiponectin-administration-alleviates-dss-induced-colonic-inflammation-in-caco-2-cells-and-mice
#12
Qin Zhao, Yang Liu, Lei Tan, Liyong Yan, Xiuli Zuo
BACKGROUND: Adiponectin, a protein hormone produced by adipose tissues, exhibits anti-inflammatory functions in various models. This study was investigated the effects of adiponectin on dextran sodium sulfate (DSS)-colonic injury, inflammation, apoptosis, and intestinal barrier dysfunction in Caco-2 cell and mice. MATERIALS AND METHODS: The results showed that DSS caused inflammatory response and intestinal barrier dysfunction in vitro and in vivo. Adiponectin injection alleviated colonic injury and rectal bleeding in mice...
May 15, 2018: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/29765519/long-noncoding-rnas-are-associated-with-metabolic-and-cellular-processes-in-the-jejunum-mucosa-of-pre-weaning-calves-in-response-to-different-diets
#13
Rosemarie Weikard, Frieder Hadlich, Harald M Hammon, Doerte Frieten, Caroline Gerbert, Christian Koch, Georg Dusel, Christa Kuehn
Long noncoding RNAs (lncRNAs) emerged as important regulatory component of mechanisms involved in gene expression, chromatin modification and epigenetic processes, but they are rarely annotated in the bovine genome. Our study monitored the jejunum transcriptome of German Holstein calves fed two different milk diets using transcriptome sequencing (RNA-seq). To identify potential lncRNAs within the pool of unknown transcripts, four bioinformatic lncRNA prediction tools were applied. The intersection of the alignment-free lncRNA prediction tools (CNCI, PLEK and FEELnc) predicted 1,812 lncRNA transcripts concordantly comprising a catalogue of 1,042 putative lncRNA loci expressed in the calves' intestinal mucosa...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29764197/re-thinking-the-chicken-campylobacter-jejuni-interaction-a-review
#14
Wageha A Awad, Claudia Hess, Michael Hess
Chickens are recognized as an imperative source of thermophilic Campylobacter spp., carrying this microorganism in high numbers in their intestinal tract. For long time, C. jejuni has been considered as a commensal microorganism which colonizes its primary host rather than infecting it, in the absence of any obvious clinical signs. However, recent studies question this and argue for a deeper understanding of the host-bacteria interaction. Following oral uptake it was demonstrated that C. jejuni interacts intimately with the gut epithelium and influences cellular functions of the host, with consequences on nutrient absorption...
May 15, 2018: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/29761483/epithelial-barrier-dysfunctions-in-atopic-dermatitis-a-skin-gut-lung-model-linking-microbiome-alteration-and-immune-dysregulation
#15
REVIEW
T H Zhu, T R Zhu, K A Tran, R K Sivamani, V Y Shi
Atopic dermatitis is a systemic disorder characterized by abnormal barrier function across multiple organ sites. Initial disruption in the skin epidermal barrier permits allergen sensitization and colonization by pathogens. This induces TH 2 inflammatory response and a thymic stromal lymphopoietin mediated pathway that further promotes barrier breakdown at distant sites including the intestinal and respiratory tract. Clinically, atopic dermatitis can progress from skin disease to food allergy, allergic rhinitis, and later asthma, a phenomenon commonly known as the atopic march...
May 15, 2018: British Journal of Dermatology
https://www.readbyqxmd.com/read/29756263/biotransformation-and-biological-interaction-of-graphene-and-graphene-oxide-during-simulated-oral-ingestion
#16
Daniela Guarnieri, Paola Sánchez-Moreno, Antonio Esaú Del Rio Castillo, Francesco Bonaccorso, Francesca Gatto, Giuseppe Bardi, Cristina Martín, Ester Vázquez, Tiziano Catelani, Stefania Sabella, Pier Paolo Pompa
The biotransformation and biological impact of few layer graphene (FLG) and graphene oxide (GO) are studied, following ingestion as exposure route. An in vitro digestion assay based on a standardized operating procedure (SOP) is exploited. The assay simulates the human ingestion of nanomaterials during their dynamic passage through the different environments of the gastrointestinal tract (salivary, gastric, intestinal). Physical-chemical changes of FLG and GO during digestion are assessed by Raman spectroscopy...
May 14, 2018: Small
https://www.readbyqxmd.com/read/29755893/policing-the-intestinal-epithelial-barrier-innate-immune-functions-of-intraepithelial-lymphocytes
#17
Madeleine D Hu, Luo Jia, Karen L Edelblum
Purpose of review: This review will explore the contribution of IELs to mucosal innate immunity and highlight the similarities in IEL functional responses to bacteria, viruses and protozoan parasite invasion. Recent findings: IELs rapidly respond to microbial invasion by activating host defense responses, including the production of mucus and antimicrobial peptides to prevent microbes from reaching the epithelial surface. During active infection, IELs promote epithelial cytolysis, cytokine and chemokine production to limit pathogen invasion, replication and dissemination...
March 2018: Current Pathobiology Reports
https://www.readbyqxmd.com/read/29754319/responses-of-rainbow-trout-intestinal-epithelial-cells-to-different-kinds-of-nutritional-deprivation
#18
Patrick G Pumputis, Vivian R Dayeh, Lucy E J Lee, Phuc H Pham, Zhenzhen Liu, Senthuri Viththiyapaskaran, Niels C Bols
In order to develop an in vitro system to study the cell biology of starvation in the fish intestine, rainbow trout intestinal epithelial cells were subjected to three kinds of nutrient deprivation and evaluated for 7 days. The RTgutGC cell line was grown into monolayers in Leibovitz's basal medium supplemented with fetal bovine serum (L15/FBS) and then subjected to deprivation of serum (L15); of serum, amino acids, and vitamin (L15/ex); and of all nutrients (L15/salts). After 7 days of nutrient deprivation, the cells remained attached to the plastic surface as monolayers but changes were seen in shape, with the cells becoming more polygonal, actin and α-tubulin cytoskeleton organization, and in tight junction protein-1 (ZO-1) localization...
May 12, 2018: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29746551/a-multi-chamber-microfluidic-intestinal-barrier-model-using-caco-2-cells-for-drug-transport-studies
#19
Hsih-Yin Tan, Sofie Trier, Ulrik L Rahbek, Martin Dufva, Jörg P Kutter, Thomas L Andresen
This paper presents the design and fabrication of a multi-layer and multi-chamber microchip system using thiol-ene 'click chemistry' aimed for drug transport studies across tissue barrier models. The fabrication process enables rapid prototyping of multi-layer microfluidic chips using different thiol-ene polymer mixtures, where porous Teflon membranes for cell monolayer growth were incorporated by masked sandwiching thiol-ene-based fluid layers. Electrodes for trans-epithelial electrical resistance (TEER) measurements were incorporated using low-melting soldering wires in combination with platinum wires, enabling parallel real-time monitoring of barrier integrity for the eight chambers...
2018: PloS One
https://www.readbyqxmd.com/read/29746173/induction-of-gut-proteasome-activity-in-hemorrhagic-shock-and-its-recovery-by-treatment-with-diphenyldihaloketones-clefma-and-ef24
#20
Geeta Rao, Hailey Houson, Gregory Nkepang, Hooman Yari, Chengwen Teng, Vibhudutta Awasthi
BACKGROUND: Multi-organ failure in hemorrhagic shock is triggered by gut barrier dysfunction and consequent systemic infiltration of proinflammatory factors. Our previous study has shown that diphenyldihaloketone drugs CLEFMA and EF24 restore gut barrier dysfunction and reduce systemic inflammatory response in hemorrhagic shock. AIMS: We investigated the effect of hemorrhagic shock on proteasome activity of intestinal epithelium and how CLEFMA and EF24 treatments modulate proteasome function in hemorrhagic shock...
May 10, 2018: American Journal of Physiology. Gastrointestinal and Liver Physiology
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