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Gastrointestinal physiology

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https://www.readbyqxmd.com/read/29788876/exploiting-significance-of-physical-exercise-in-prevention-of-gastrointestinal-disorders
#1
Jan Bilski, Agnieszka Mazur-Bialy, Marcin Magierowski, Slawomir Kwiecien, Dagmara Wojcik, Agata Ptak-Belowska, Marcin Surmiak, Aneta Targosz, Katarzyna Magierowska, Tomasz Brzozowski
BACKGROUND: Physical activity can be involved in the prevention of gastrointestinal (GI)-tract diseases, however, the results regarding the volume and the intensity of exercise considered as beneficial for protection of gastrointestinal organs are conflicting. AIMS AND METHODS: The main objective of this review is to provide a comprehensive and updated overview on the beneficial and harmful effects of physical activity on the gastrointestinal tract. We attempted to discuss recent evidence regarding the association between different modes and intensity levels of exercise and physiological functions of the gut and gut pathology...
May 21, 2018: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29788186/nanoparticle-based-oral-drug-delivery-systems-targeting-the-colon-for-treatment-of-ulcerative-colitis
#2
Mingzhen Zhang, Didier Merlin
Inflammatory bowel disease (IBD), including Crohn's disease (CD) and ulcerative colitis (UC), is characterized by chronic relapsing inflammation of the gastrointestinal tract. Delivery of orally administered drugs to the colon is highly desirable for the treatment of UC, as it improves their efficacy while reducing systemic toxicity. However, the targeting of oral drugs to the colon, which is located at the distal end of the gastrointestinal tract, is difficult due to physiological challenges, biochemical barriers, and environmental barriers, including those associated with mucus and epithelium...
May 18, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29785173/phytochemicals-that-influence-gut-microbiota-as-prophylactics-and-for-the-treatment-of-obesity-and-inflammatory-diseases
#3
REVIEW
Lucrecia Carrera-Quintanar, Rocío I López Roa, Saray Quintero-Fabián, Marina A Sánchez-Sánchez, Barbara Vizmanos, Daniel Ortuño-Sahagún
Gut microbiota (GM) plays several crucial roles in host physiology and influences several relevant functions. In more than one respect, it can be said that you "feed your microbiota and are fed by it." GM diversity is affected by diet and influences metabolic and immune functions of the host's physiology. Consequently, an imbalance of GM, or dysbiosis, may be the cause or at least may lead to the progression of various pathologies such as infectious diseases, gastrointestinal cancers, inflammatory bowel disease, and even obesity and diabetes...
2018: Mediators of Inflammation
https://www.readbyqxmd.com/read/29782463/gut-microbiota-probiotics-and-sport-from-clinical-evidence-to-agonistic-performance
#4
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/29777378/characterization-of-low-active-ghrelin-ratio-in-patients-with-advanced-pancreatic-cancer
#5
Tomofumi Miura, Shuichi Mitsunaga, Masafumi Ikeda, Izumi Ohno, Hideaki Takahashi, Hidetaka Suzuki, Ai Irisawa, Takeshi Kuwata, Atsushi Ochiai
PURPOSE: Acyl ghrelin is an orexigenic peptide. Active ghrelin ratio, the ratio of acyl ghrelin to total ghrelin, has an important role in physiological functions and gastrointestinal symptoms. However, low active ghrelin ratio-related characteristics, gastrointestinal symptoms, and chemotherapy-induced gastrointestinal toxicity in patients with advanced pancreatic cancer have not been previously evaluated. The goal of this study was to identify low active ghrelin ratio-related factors in treatment-naïve advanced pancreatic cancer patients...
May 18, 2018: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/29777136/functional-proteomic-profiling-of-secreted-serine-proteases-in-health-and-inflammatory-bowel-disease
#6
Alexandre Denadai-Souza, Chrystelle Bonnart, Núria Solà Tapias, Marlène Marcellin, Brendan Gilmore, Laurent Alric, Delphine Bonnet, Odile Burlet-Schiltz, Morley D Hollenberg, Nathalie Vergnolle, Céline Deraison
While proteases are essential in gastrointestinal physiology, accumulating evidence indicates that dysregulated proteolysis plays a pivotal role in the pathophysiology of inflammatory bowel disease (IBD). Nonetheless, the identity of overactive proteases released by human colonic mucosa remains largely unknown. Studies of protease abundance have primarily investigated expression profiles, not taking into account their enzymatic activity. Herein we have used serine protease-targeted activity-based probes (ABPs) coupled with mass spectral analysis to identify active forms of proteases secreted by the colonic mucosa of healthy controls and IBD patients...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29770190/effects-of-molecular-hydrogen-dissolved-alkaline-electrolyzed-water-on-intestinal-environment-in-mice
#7
Yasuki Higashimura, Yasunori Baba, Ryo Inoue, Tomohisa Takagi, Kazuhiko Uchiyama, Katsura Mizushima, Yasuko Hirai, Chihiro Ushiroda, Yoshinori Tanaka, Yuji Naito
Increasing evidence indicates that molecular hydrogen-dissolved alkaline electrolyzed water (AEW) has various physiological activities such as antioxidative activity. Gut microbiota are deeply associated with our health through a symbiotic relationship. Recent reports have described that most gastrointestinal microbial species encode the genetic capacity to metabolize molecular hydrogen, meaning that molecular hydrogen might affect the gut microbial composition. Nevertheless, AEW effects on gut microbiota remain unknown...
January 2018: Medical Gas Research
https://www.readbyqxmd.com/read/29767701/microbiome-mediated-effects-of-the-mediterranean-diet-on-inflammation
#8
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/29766501/impact-of-gastrointestinal-disease-states-on-oral-drug-absorption-implications-for-formulation-design-a-pearrl-review
#9
REVIEW
Angela Effinger, Caitriona M O'Driscoll, Mark McAllister, Nikoletta Fotaki
OBJECTIVES: Drug product performance in patients with gastrointestinal (GI) diseases can be altered compared to healthy subjects due to pathophysiological changes. In this review, relevant differences in patients with inflammatory bowel diseases, coeliac disease, irritable bowel syndrome and short bowel syndrome are discussed and possible in vitro and in silico tools to predict drug product performance in this patient population are assessed. KEY FINDINGS: Drug product performance was altered in patients with GI diseases compared to healthy subjects, as assessed in a limited number of studies for some drugs...
May 16, 2018: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/29758344/the-effects-of-three-absorption-modifying-critical-excipients-on-the-in-vivo-intestinal-absorption-of-six-model-compounds-in-rats-and-dogs
#10
Dahlgren David, Roos Carl, Johansson Pernilla, Tannergren Christer, Lundqvist Anders, Langguth Peter, Sjöblom Markus, Sjögren Erik, Lennernäs Hans
Pharmaceutical excipients that may affect gastrointestinal (GI) drug absorption are called critical pharmaceutical excipients (CPEs), or absorption-modifying excipients (AMEs) if they act by altering the integrity of the intestinal epithelial cell membrane. Some of these excipients increase intestinal permeability, and subsequently the absorption and bioavailability of the drug. This could have implications for both the assessment of bioequivalence and the efficacy of the absorption-enhancing drug delivery system...
May 11, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29757965/nutrition-of-six-selected-neo-tropical-mammals-in-trinidad-and-tobago-with-the-potential-for-domestication
#11
REVIEW
Kavita Ranjeeta Lall, Kegan Romelle Jones, Gary Wayne Garcia
This review highlights the available literature on the nutrition of six neo-tropical animals with the potential for domestication-the agouti ( Dasyprocta leporina / D. aguti ), lappe ( Agouti paca ), capybara ( Hydrochoerus hydrochaeris ), manicou/opossum ( Didelphis marsupialis insularis ), collared peccary ( Peccary tajucu ) and the red brokcet deer ( Mazama americana ). Over 100 references were used, spanning over 100 years. The earliest being 1915 and the most recent being 2018. The references used in this review were synthesized to give a detailed look of the dentition, anatomy of the gastrointestinal tract and type of feed these animals consume...
May 14, 2018: Veterinary Sciences
https://www.readbyqxmd.com/read/29756575/effects-of-stress-on-the-mucus-microbial-interactions-in-the-gut
#12
Jianwen He, Huiduo Guo, Weijiang Zheng, Wen Yao
Stress shows both direct- and indirect-effects on the functions of the gastrointestinal tract, in particular on the mucus physiology and the composition of microbiota. Mucus mainly consists of heavily glycosylated proteins called mucins, which are secreted by goblet cells. The gut mucus layer is a pivotal part of the intestinal protection and colonized by commensal microbes, essential for the development and health of the host. There is a symbiotic interaction between intestinal microbiota and the host cells...
May 14, 2018: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/29756574/dietary-protein-and-gut-microbiome-composition-and-function
#13
Jianfei Zhao, Xiaoya Zhang, Hongbin Liu, Michael A Brown, Shiyan Qiao
Dietary protein and its metabolites, amino acids are essential nutrients for human and animals. Accumulated researches revealed that the gut microbiota mediate the crosstalk between protein metabolism and host immune response. Gut microbes are involved in the digestion, absorption, metabolism and transformation process of dietary protein in the gastrointestinal tract. Amino acids can be metabolized into numerous microbial metabolites, and these metabolites participate in various physiological functions related to host health and diseases...
May 14, 2018: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/29753416/acute-exposure-to-space-flight-results-in-evidence-of-reduced-lymph-transport-tissue-fluid-shifts-and-immune-alterations-in-the-rat-gastrointestinal-system
#14
W E Cromer, D C Zawieja
Space flight causes a number of alterations in physiological systems, changes in the immunological status of subjects, and altered interactions of the host to environmental stimuli. We studied the effect of space flight on the lymphatic system of the gastrointestinal tract which is responsible for lipid transport and immune surveillance which includes the host interaction with the gut microbiome. We found that there were signs of tissue damage present in the space flown animals that was lacking in ground controls (epithelial damage, crypt morphological changes, etc...
May 2018: Life Sciences in Space Research
https://www.readbyqxmd.com/read/29751733/intestinal-absorption-of-fructose
#15
Ronaldo P Ferraris, Jun-Yong Choe, Chirag R Patel
Increased understanding of fructose metabolism, which begins with uptake via the intestine, is important because fructose now constitutes a physiologically significant portion of human diets and is associated with increased incidence of certain cancers and metabolic diseases. New insights in our knowledge of intestinal fructose absorption mediated by the facilitative glucose transporter GLUT5 in the apical membrane and by GLUT2 in the basolateral membrane are reviewed. We begin with studies related to structure as well as ligand binding, then revisit the controversial proposition that apical GLUT2 is the main mediator of intestinal fructose absorption...
May 11, 2018: Annual Review of Nutrition
https://www.readbyqxmd.com/read/29750964/review-apelin-in-disease
#16
REVIEW
Hanna Antushevich, Maciej Wójcik
Apelin, a regulatory peptide, is a ligand of the APJ receptor that belongs to the G protein-coupled receptor family. Apelin and APJ are widely distributed in the body and play potential physiological roles in the cytoprotection of many internal organs. This review article summarizes information about the roles of the apelin/APJ system in neurological, metabolic, hypertension, respiratory, gastrointestinal, hepatic, kidney and cancerous diseases. It is suggested that apelin positively affects the treatment of non-cancerous diseases and may be considered as a therapeutic drug in many illnesses...
May 8, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29749705/fecal-clostridiales-distribution-and-short-chain-fatty-acids-reflect-bowel-habits-in-irritable-bowel-syndrome
#17
Giorgio Gargari, Valentina Taverniti, Claudio Gardana, Cesare Cremon, Filippo Canducci, Isabella Pagano, Maria Raffaella Barbaro, Lara Bellacosa, Anna Maria Castellazzi, Chiara Valsecchi, Sara Carlotta Tagliacarne, Massimo Bellini, Lorenzo Bertani, Dario Gambaccini, Santino Marchi, Michele Cicala, Bastianello Germanà, Elisabetta Dal Pont, Maurizio Vecchi, Cristina Ogliari, Walter Fiore, Vincenzo Stanghellini, Giovanni Barbara, Simone Guglielmetti
Irritable bowel syndrome (IBS), a common functional gastrointestinal disorder, is classified according to bowel habits as IBS with constipation (IBS-C), with diarrhea (IBS-D), with alternating constipation and diarrhea (IBS-M), and unsubtyped (IBS-U). The mechanisms leading to the different IBS forms are mostly unknown. This study aims to evaluate whether specific fecal bacterial taxa and/or short-chain fatty acids (SCFAs) can be used to distinguish IBS subtypes and are relevant for explaining the clinical differences between IBS sub-categories...
May 11, 2018: Environmental Microbiology
https://www.readbyqxmd.com/read/29743727/different-rearing-conditions-alter-gut-microbiota-composition-and-host-physiology-in-shaoxing-ducks
#18
Shumei Wang, Li Chen, Maozhang He, Junda Shen, Guoqin Li, Zhengrong Tao, Rurong Wu, Lizhi Lu
Emerging evidences have linked the gut microbiota to poultry physiology. Gut microbiota composition in Shaoxing ducks were profiled under different rearing conditions: raised on the litter floor and the plastic mesh floor. A total of 46 and 39 luminal content samples from the duodenum, ileum, and cecum of the ducks reared under the two conditions were analyzed by 16S rRNA gene amplicon sequencing analysis. Proteobacteria (48.66%), Proteobacteria (33.38%), and Bacteroidetes (55.35%) were the dominant phyla in the duodenum, ileum, and cecum of the ducks reared on the litter floor respectively, while Firmicutes (30...
May 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29736887/transfer-behavior-of-the-weakly-acidic-bcs-class-ii-drug-valsartan-from-the-stomach-to-the-small-intestine-during-fasted-and-fed-states
#19
Rania Hamed, Sabreen Hasan Alnadi
The objective of this study was to investigate the transfer behavior of the weakly acidic BCS class II drug valsartan from the stomach to the small intestine during fasted and fed states. An in vitro transfer model previously introduced by Kostewicz et al. (J Pharm Pharmacol 56(1):43-51, 2004) based on a syringe pump and a USP paddle apparatus was used to determine the concentration profiles of valsartan in the small intestine. Donor phases of simulated gastric fluid during fasted (FaSSGF) and fed (FeSSGF) states were used to predisperse Diovan® tablets (160 mg valsartan)...
May 7, 2018: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29735288/clinical-practice-guidelines-for-the-treatment-of-systemic-lupus-erythematosus-by-the-mexican-college-of-rheumatology
#20
Daniel Xibillé-Friedmann, Marcela Pérez-Rodríguez, Sandra Carrillo-Vázquez, Everardo Álvarez-Hernández, Francisco Javier Aceves, Mario C Ocampo-Torres, Conrado García-García, José Luis García-Figueroa, Javier Merayo-Chalico, Ana Barrera-Vargas, Margarita Portela-Hernández, Sandra Sicsik, Lilia Andrade-Ortega, Víctor Manuel Rosales-Don Pablo, Aline Martínez, Pilar Prieto-Seyffert, Mario Pérez-Cristóbal, Miguel Ángel Saavedra, Zully Castro-Colín, Azucena Ramos, Gabriela Huerta-Sil, María Fernanda Hernández-Cabrera, Luis Javier Jara, Leonardo Limón-Camacho, Lizbet Tinajero-Nieto, Leonor A Barile-Fabris
There are national and international clinical practice guidelines for systemic lupus erythematosus treatment. Nonetheless, most of them are not designed for the Mexican population or are devoted only to the treatment of certain disease manifestations, like lupus nephritis, or are designed for some physiological state like pregnancy. The Mexican College of Rheumatology aimed to create clinical practice guidelines that included the majority of the manifestations of systemic lupus erythematosus, and also incorporated guidelines in controversial situations like vaccination and the perioperative period...
May 4, 2018: Reumatología Clinica
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