keyword
MENU ▼
Read by QxMD icon Read
search

Mechanism secretion of mucus

keyword
https://www.readbyqxmd.com/read/28600348/loss-of-the-wnt-receptor-frizzled7-in-the-gastric-epithelium-is-deleterious-and-triggers-rapid-repopulation-in-vivo
#1
Dustin J Flanagan, Nicholas Barker, Cameron Nowell, Hans Clevers, Matthias Ernst, Toby J Phesse, Elizabeth Vincan
The gastric epithelium consists of tubular glandular units each containing several differentiated cells types, and populations of stem cells, which enable the stomach to secrete the acid, mucus and various digestive enzymes required for its function. Cell signalling provides cues to regulate development and homeostasis of adult tissues, however very little is known about which cell signalling pathways are required for homeostasis of the gastric epithelium. Many diseases, such as cancer, arise as a result of deregulation to signalling pathways that regulate homeostasis of the diseased organ...
June 9, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28588563/insight-into-potential-probiotic-markers-predicted-in-lactobacillus-pentosus-mp-10-genome-sequence
#2
Hikmate Abriouel, Beatriz Pérez Montoro, Carlos S Casimiro-Soriguer, Antonio J Pérez Pulido, Charles W Knapp, Natacha Caballero Gómez, Sonia Castillo-Gutiérrez, María D Estudillo-Martínez, Antonio Gálvez, Nabil Benomar
Lactobacillus pentosus MP-10 is a potential probiotic lactic acid bacterium originally isolated from naturally fermented Aloreña green table olives. The entire genome sequence was annotated to in silico analyze the molecular mechanisms involved in the adaptation of L. pentosus MP-10 to the human gastrointestinal tract (GIT), such as carbohydrate metabolism (related with prebiotic utilization) and the proteins involved in bacteria-host interactions. We predicted an arsenal of genes coding for carbohydrate-modifying enzymes to modify oligo- and polysaccharides, such as glycoside hydrolases, glycoside transferases, and isomerases, and other enzymes involved in complex carbohydrate metabolism especially starch, raffinose, and levan...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28571979/impact-of-high-fat-diet-on-the-intestinal-microbiota-and-small-intestinal-physiology-before-and-after-the-onset-of-obesity
#3
REVIEW
João Ricardo Araújo, Julie Tomas, Christiane Brenner, Philippe J Sansonetti
The modulation of the intestinal microbiota by high-fat diet (HFD) has a major impact on both immunological and metabolic functions of the host. Taking this into consideration, the aim of this contribution is to review the impact of HFD on microbiota profile and small intestinal physiology before and after the onset of obesity and its metabolic complications. Evidence from animal studies suggest that before the onset of obesity and its metabolic complications, HFD induces intestinal dysbiosis - encompassing changes in composition balance and massive redistribution with bacteria occupying intervillous spaces and crypts - associated with early physiopathological changes, predominantly in the ileum, such as low-grade inflammation, decreased antimicrobial peptides expression, impaired mucus production, secretion and layer's thickness, and decreased expression of tight junction proteins...
May 29, 2017: Biochimie
https://www.readbyqxmd.com/read/28566470/early-life-allergen-induced-mucus-overproduction-requires-augmented-neural-stimulation-of-pulmonary-neuroendocrine-cell-secretion
#4
Juliana Barrios, Kruti R Patel, Linh Aven, Rebecca Achey, Martin S Minns, Yoonjoo Lee, Vickery E Trinkaus-Randall, Xingbin Ai
Pulmonary neuroendocrine cells (PNECs) are the only innervated airway epithelial cells. To what extent neural innervation regulates PNEC secretion and function is unknown. Here, we discover that neurotrophin 4 (NT4) plays an essential role in mucus overproduction after early life allergen exposure by orchestrating PNEC innervation and secretion of GABA. We found that PNECs were the only cellular source of GABA in airways. In addition, PNECs expressed NT4 as a target-derived mechanism underlying PNEC innervation during development...
May 31, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28546154/synergistic-mucus-secretion-by-histamine-and-il-4-through-tmem16a-in-airway-epithelium
#5
Ju Wan Kang, Yong Hyuk Lee, Min Jeong Kang, Hyun Jae Lee, Ryung Oh, Hyun Jin Min, Wan Namkung, Jae Young Choi, Sang Nam Lee, Chang-Hoon Kim, Joo-Heon Yoon, Hyung-Ju Cho
Histamine is an important mediator of allergic reactions, and mucus hypersecretion is a major allergic symptom. However, the direct effect of histamine on mucus secretion from airway mucosal epithelia has not been clearly demonstrated. TMEM16A is a Ca2+-activated chloride channel, and it is closely related to fluid secretion in airway mucosal epithelia. We investigated whether histamine directly induces fluid secretion from epithelial cells or submucosal glands (SMG) and mechanisms related therewith in allergic airway diseases...
May 25, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28507586/neutrophil-elastase-stimulates-muc5ac-expression-in-human-biliary-epithelial-cells-a-possible-pathway-of-pkc-nox-ros
#6
Yu Tian, Min Li, Shuodong Wu, Duoliang Wang, Ben Sun, Junqing Xie, Hong Wang
INTRODUCTION: Bacterial infection and bile flow retardation form a vicious cycle which promotes stone formation and recurrence, and it seems that mucin overexpression plays an important role in this process. However, the mechanism of increased mucus secretion in the biliary tract by bacterial infection and its treatment remain unclear. MATERIAL AND METHODS: Human biliary epithelial cells were induced by neutrophil elastase (NE), and H2O2 production in the cell supernatants was detected by a specific kit, and then cells were pretreated with a H2O2 inhibitor, and expression of MUC5AC was detected by real-time polymerase chain reaction (PCR), Western blot, and immunohistochemistry...
April 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28507013/mechanisms-of-action-of-probiotics-and-the-gastrointestinal-microbiota-on-gut-motility-and-constipation
#7
REVIEW
Eirini Dimidi, Stephanos Christodoulides, S Mark Scott, Kevin Whelan
Constipation is a common and burdensome gastrointestinal disorder that may result from altered gastrointestinal motility. The effect of probiotics on constipation has been increasingly investigated in both animal and human studies, showing promising results. However, there is still uncertainty regarding the mechanisms of action of probiotics on gut motility and constipation. Several factors are vital to normal gut motility, including immune and nervous system function, bile acid metabolism and mucus secretion, and the gastrointestinal microbiota and fermentation; an imbalance or dysfunction in any of these components may contribute to aberrant gut motility and, consequently, symptoms of constipation...
May 2017: Advances in Nutrition
https://www.readbyqxmd.com/read/28476309/bombesin-receptor-activated-protein-regulates-neutrophil-elastase-induced-mucin-5ac-hypersecretion-in-human-bronchial-epithelial-cells
#8
Qing Xu, Ling-Xiu Chen, Dan-Hua Ran, Wen-Yue Xie, Xiang-Dong Zhou
Bombesin receptor-activated protein (BRAP) is highly expressed in human bronchial epithelial cells. Recent studies have shown that BRAP reduces oxidative stress, inhibits airway inflammation and suppresses nuclear factor kappaB (NF-κB) activity. Mucus overproduction is an important feature in patients with chronic inflammatory airway diseases. Neutrophil elastase (NE) is a potent inducer of mucin5AC (MUC5AC), which is considered the predominant mucin secreted by human airway epithelial cells. Here, we hypothesize that BRAP may regulate NE-induced MUC5AC hypersecretion in a bronchial epithelial cell line (HBE16)...
May 2, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28413565/enrichment-of-in-vivo-transcription-data-from-dietary-intervention-studies-with-in-vitro-data-provides-improved-insight-into-gene-regulation-mechanisms-in-the-intestinal-mucosa
#9
Marcel Hulst, Alfons Jansman, Ilonka Wijers, Arjan Hoekman, Stéphanie Vastenhouw, Marinus van Krimpen, Mari Smits, Dirkjan Schokker
BACKGROUND: Gene expression profiles of intestinal mucosa of chickens and pigs fed over long-term periods (days/weeks) with a diet rich in rye and a diet supplemented with zinc, respectively, or of chickens after a one-day amoxicillin treatment of chickens, were recorded recently. Such dietary interventions are frequently used to modulate animal performance or therapeutically for monogastric livestock. In this study, changes in gene expression induced by these three interventions in cultured "Intestinal Porcine Epithelial Cells" (IPEC-J2) recorded after a short-term period of 2 and 6 hours, were compared to the in vivo gene expression profiles in order to evaluate the capability of this in vitro bioassay in predicting in vivo responses...
2017: Genes & Nutrition
https://www.readbyqxmd.com/read/28400412/western-diet-consumption-induces-alteration-of-barrier-function-mechanisms-in-the-ileum-that-correlates-with-metabolic-endotoxemia-in-rats
#10
Mathilde Guerville, Anaïs Leroy, Annaëlle Sinquin, Fabienne Laugerette, Marie-Caroline Michalski, Gaëlle Boudry
Obesity and its related disorders have been associated to the presence in the blood of gut bacteria-derived lipopolysaccharides (LPS). However, the factors underlying this low-grade elevation in plasma LPS, so-called metabolic endotoxemia, are not fully elucidated. We aimed to investigate the effects of Western diet (WD) feeding on intestinal and hepatic LPS handling mechanisms in a rat model of diet-induced obesity (DIO). Rats were fed either a standard chow diet (C) or a Western Diet (WD, 45% fat) for 6 weeks...
April 11, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28397820/bitter-taste-receptor-agonists-mitigate-features-of-allergic-asthma-in-mice
#11
Pawan Sharma, Roslyn Yi, Ajay P Nayak, Nadan Wang, Francesca Tang, Morgan J Knight, Shi Pan, Brian Oliver, Deepak A Deshpande
Asthma is characterized by airway inflammation, mucus secretion, remodeling and hyperresponsiveness (AHR). Recent research has established the bronchodilatory effect of bitter taste receptor (TAS2R) agonists in various models. Comprehensive pre-clinical studies aimed at establishing effectiveness of TAS2R agonists in disease models are lacking. Here we aimed to determine the effect of TAS2R agonists on features of asthma. Further, we elucidated a mechanism by which TAS2R agonists mitigate features of asthma...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28390017/interaction-of-tio2-nanoparticles-with-proteins-from-aquatic-organisms-the-case-of-gill-mucus-from-blue-mussel
#12
Adeline Bourgeault, Véronique Legros, Florence Gonnet, Regis Daniel, Aurélie Paquirissamy, Clémence Bénatar, Olivier Spalla, Corinne Chanéac, Jean-Philippe Renault, Serge Pin
To better understand the mechanisms of TiO2 nanoparticle (NP) uptake and toxicity in aquatic organisms, we investigated the interaction of NPs with the proteins found in gill mucus from blue mussels. Mucus is secreted by many aquatic organisms and is often their first line of defense against pathogens, xenobiotics, and other sources of environmental stress. Here, five TiO2 NPs and one SiO2 NP were incubated with gill mucus and run out on a one-dimensional polyacrylamide gel for a comparative qualitative analysis of the free proteins in the mucosal solution and the proteins bound to NPs...
May 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28294161/in-vivo-imaging-of-the-muc5b-gel-forming-mucin
#13
Céline Portal, Valérie Gouyer, Mylène Magnien, Ségolène Plet, Frédéric Gottrand, Jean-Luc Desseyn
Gel-forming mucins are macromolecules produced by goblet cells and responsible for the mucus gel formation. Changes in goblet cell density and in gel-forming mucin production have emerged as sensitive indicators for mucosal diseases. A Muc5b-GFP tagged reporter mouse was used to assess Muc5b production in mouse tissues by immunofluorescence microscopy and fluorescent activity using stereromicroscopy and probe-based confocal laser endomicroscopy. Muc5b production was followed longitudinally by recording the fluorescent activity in vagina and in embryonic lung explants under stimulation by interleukin 13...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28223396/personalising-airway-clearance-in-chronic-lung-disease
#14
REVIEW
Maggie McIlwaine, Judy Bradley, J Stuart Elborn, Fidelma Moran
This review describes a framework for providing a personalised approach to selecting the most appropriate airway clearance technique (ACT) for each patient. It is based on a synthesis of the physiological evidence that supports the modulation of ventilation and expiratory airflow as a means of assisting airway clearance. Possession of a strong understanding of the physiological basis for ACTs will enable clinicians to decide which ACT best aligns with the individual patient's pathology in diseases with anatomical bronchiectasis and mucus hypersecretion...
January 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/28214100/nlrp6-a-multifaceted-innate-immune-sensor
#15
REVIEW
Maayan Levy, Hagit Shapiro, Christoph A Thaiss, Eran Elinav
NLRP6, a member of the nucleotide-binding domain, leucine-rich repeat-containing (NLR) innate immune receptor family, regulates inflammation and host defense against microorganisms. Similar to other NLRs, NLRP6 not only participates in inflammasome formation, but is also involved in nuclear factor-κB (NF-κB) and mitogen-activated protein kinase (MAPK) signaling regulation and facilitation of gastrointestinal antiviral effector functions. Additionally, NLRP6 contributes to the regulation of mucus secretion and antimicrobial peptide production, thereby impacting intestinal microbial colonization and associated microbiome-related infectious, autoinflammatory, metabolic, and neoplastic diseases...
April 2017: Trends in Immunology
https://www.readbyqxmd.com/read/28196385/-comparison-of-different-mechanical-insufflator-exsufflator-systems-by-measurement-of-the-peak-exspiratory-flow-pef
#16
Ansgar Schütz, Janine Wagner, Anne Conrad, Andreas Funke
Background The management of pulmonary secretion in patients with respiratory muscle weakness using mechanical insufflator-exsufflator systems (MIE) is an established treatment option. There are significant differences in the efficiency of different devices in practical use. The intention of this study was to evaluate the peak exspiratory flow (PEF) values of different devices with and without use of equipment. Methods PEFs of ten MIE were investigated in vitro using different equipment. Results The efficiency of the devices showed significant differences...
March 2017: Pneumologie
https://www.readbyqxmd.com/read/28168011/semipurified-ethyl-acetate-partition-of-methanolic-extract-of-melastoma-malabathricum-leaves-exerts-gastroprotective-activity-partly-via-its-antioxidant-antisecretory-anti-inflammatory-action-and-synergistic-action-of-several-flavonoid-based-compounds
#17
Noor Wahida Ismail Suhaimy, Ahmad Khusairi Noor Azmi, Norhafizah Mohtarrudin, Maizatul Hasyima Omar, Siti Farah Md Tohid, Manraj Singh Cheema, Lay Kek Teh, Mohd Zaki Salleh, Zainul Amiruddin Zakaria
Recent study has demonstrated the gastroprotective activity of crude methanolic extract of M. malabathricum leaves. The present study evaluated the gastroprotective potential of semipurified extracts (partitions): petroleum ether, ethyl acetate (EAMM), and aqueous obtained from the methanolic extract followed by the elucidation of the gastroprotective mechanisms of the most effective partition. Using the ethanol-induced gastric ulcer assay, all partitions exerted significant gastroprotection, with EAMM being the most effective partition...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28150752/rainbow-trout-oncorhynchus-mykiss-secretory-component-binds-to-commensal-bacteria-and-pathogens
#18
Cecelia Kelly, Fumio Takizawa, J Oriol Sunyer, Irene Salinas
Commensal bacteria co-exist on the mucosal surfaces of all vertebrates. The host's mucosal immune system must tolerate commensals while fighting pathogens. One of the mechanisms used by the mucosal immune system to maintain homeostasis is the secretion of immunoglobulins (Igs) across epithelial barriers, which is achieved via the polymeric immunoglobulin receptor (pIgR). Rainbow trout pIgR is known to transport IgT and IgM across epithelia. However, other biological functions for trout pIgR or trout secretory component (tSC) remain unknown...
February 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28145442/elevated-gdf-15-contributes-to-pulmonary-inflammation-upon-cigarette-smoke-exposure
#19
F M Verhamme, L J M Seys, E G De Smet, S Provoost, W Janssens, D Elewaut, G F Joos, G G Brusselle, K R Bracke
The molecular mechanisms underlying the pathogenesis of chronic obstructive pulmonary disease (COPD) are still unclear, however signaling pathways associated with lung development, such as the transforming growth factor (TGF)-β superfamily, could be implicated in COPD. Growth differentiation factor (GDF)-15, a member of the TGF-β superfamily, is involved in inflammation, mucus secretion, and cachexia. We analyzed the pulmonary expression of GDF-15 in smokers and patients with COPD, in cigarette smoke (CS)-exposed cultures of primary human bronchial epithelial cells (pHBECs), and in CS-exposed mice...
February 1, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28102702/immunomodulating-peptides-for-food-allergy-prevention-and-treatment
#20
Daniel Lozano-Ojalvo, Rosina López-Fandiño
Among the most promising strategies currently assayed against IgE-mediated allergic diseases stands the possibility of using immunomodulating peptides to induce oral tolerance towards offending food allergens or even to prevent allergic sensitization. This review focuses on the beneficial effects of food derived immunomodulating peptides on food allergy, which can be directly exerted in the intestinal tract or once being absorbed through the intestinal epithelial barrier to interact with immune cells. Food peptides influence intestinal homeostasis by maintaining and reinforcing barrier function or affecting intestinal cell-signalling to nearby immune cells and mucus secretion...
January 19, 2017: Critical Reviews in Food Science and Nutrition
keyword
keyword
105708
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"