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https://www.readbyqxmd.com/read/28098786/retinoic-acid-and-its-role-in-modulating-intestinal-innate-immunity
#1
REVIEW
Paulo Czarnewski, Srustidhar Das, Sara M Parigi, Eduardo J Villablanca
Vitamin A (VA) is amongst the most well characterized food-derived nutrients with diverse immune modulatory roles. Deficiency in dietary VA has not only been associated with immune dysfunctions in the gut, but also with several systemic immune disorders. In particular, VA metabolite all-trans retinoic acid (atRA) has been shown to be crucial in inducing gut tropism in lymphocytes and modulating T helper differentiation. In addition to the widely recognized role in adaptive immunity, increasing evidence identifies atRA as an important modulator of innate immune cells, such as tolerogenic dendritic cells (DCs) and innate lymphoid cells (ILCs)...
January 13, 2017: Nutrients
https://www.readbyqxmd.com/read/28098515/a-randomized-open-label-trial-to-assess-the-effect-of-plant-sterols-associated-with-ezetimibe-in-low-density-lipoprotein-levels-in-patients-with-coronary-artery-disease-on-statin-therapy
#2
Gisane Biacchi Gomes, Ana Denise Zazula, Leonardo Seidi Shigueoka, Rosangela Alquieri Fedato, Ana Beatriz Brenner Affonso da Costa, Luiz Cesar Guarita-Souza, Cristina Pellegrino Baena, Marcia Olandoski, José Rocha Faria-Neto
Consumption of food products enriched with plant sterols and the use of ezetimibe reduce cholesterol absorption in the intestine and effectively reduce low-density lipoprotein (LDL) plasma levels. We evaluated the therapeutic effect of the ezetimibe+plant sterol association in patients with coronary artery disease still not reaching recommended lipid levels despite the use of statins. We performed a prospective open-label study with 41 patients with stable coronary disease and LDL >70 mg/dL. Patients were randomized into four groups for a 6-week treatment: the control (CT) group remained on the same statin therapy, the ezetimibe (EZ) group received 10 mg/day of ezetimibe, the plant sterol (PS) group received spread enriched with 2 g of plant sterols, and the ezetimibe+PS (EZ+PS) group received 10 mg/day EZ +2 g PS...
January 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28098291/investigation-into-the-bioavailability-of-milk-protein-derived-peptides-with-dipeptidyl-peptidase-iv-inhibitory-activity-using-caco-2-cell-monolayers
#3
Isabelle M E Lacroix, Xiu-Min Chen, David D Kitts, Eunice C Y Li-Chan
In recent years, peptides derived from a variety of dietary proteins have been reported to exhibit inhibitory activity against the dipeptidyl-peptidase IV (DPP-IV) enzyme, a target in the management of type 2 diabetes. While much attention has been given to the production and identification of peptides with DPP-IV inhibitory activity from food proteins, particularly dairy proteins, little is known on the bioavailability of these molecules. In this study, the stability and transport of five previously identified milk-derived peptides (LKPTPEGDL, LPYPY, IPIQY, IPI and WR) and a whey protein isolate (WPI) digest with DPP-IV-inhibitory activity were investigated using Caco-2 cell monolayers as a model system for human intestinal absorption...
January 18, 2017: Food & Function
https://www.readbyqxmd.com/read/28098247/c-jun-n-terminal-kinase-2-promotes-enterocyte-survival-and-goblet-cell-differentiation-in-the-inflamed-intestine
#4
A D Mandić, E Bennek, J Verdier, K Zhang, S Roubrocks, R J Davis, B Denecke, N Gassler, K Streetz, A Kel, M Hornef, F J Cubero, C Trautwein, G Sellge
c-Jun N-terminal kinases (JNKs) contribute to immune signaling but their functional role during intestinal mucosal inflammation has remained ill defined. Using genetic mouse models, we characterized the role of JNK1 and JNK2 during homeostasis and acute colitis. Epithelial apoptosis, regeneration, differentiation, and barrier function were analyzed in intestinal epithelium-specific (ΔIEC) or complete JNK1 and bone marrow chimeric or complete JNK2 deficient mice as well as double-knockout animals (JNK1(ΔIEC)JNK2(-/-)) during homeostasis and acute dextran sulfate sodium (DSS)-induced colitis...
January 18, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28098246/tryptophan-metabolite-activation-of-the-aryl-hydrocarbon-receptor-regulates-il-10-receptor-expression-on-intestinal-epithelia
#5
J M Lanis, E E Alexeev, V F Curtis, D A Kitzenberg, D J Kao, K D Battista, M E Gerich, L E Glover, D J Kominsky, S P Colgan
IL-10 is a potent anti-inflammatory cytokine that inhibits the production of proinflammatory mediators. Signaling by IL-10 occurs through the IL-10 receptor (IL-10R), which is expressed in numerous cell types, including intestinal epithelial cells (IECs), where it is associated with development and maintenance of barrier function. Guided by an unbiased metabolomics screen, we identified tryptophan (Trp) metabolism as a major modifying pathway in interferon-γ (IFNγ)-dominant murine colitis. In parallel, we demonstrated that IFNγ induction of indoleamine 2,3-dioxygenase 1, an enzyme that catalyzes the conversion of Trp to kynurenine (Kyn), induces IL-10R1 expression...
January 18, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28098206/protein-kinase-c-%C3%AE-signaling-is-required-for-dietary-prebiotic-induced-strengthening-of-intestinal-epithelial-barrier-function
#6
Richard Y Wu, Majd Abdullah, Pekka Määttänen, Ana Victoria C Pilar, Erin Scruten, Kathene C Johnson-Henry, Scott Napper, Catherine O'Brien, Nicola L Jones, Philip M Sherman
Prebiotics are non-digestible oligosaccharides that promote the growth of beneficial gut microbes, but it is unclear whether they also have direct effects on the intestinal mucosal barrier. Here we demonstrate two commercial prebiotics, inulin and short-chain fructo-oligosaccharide (scFOS), when applied onto intestinal epithelia in the absence of microbes, directly promote barrier integrity to prevent pathogen-induced barrier disruptions. We further show that these effects involve the induction of select tight junction (TJ) proteins through a protein kinase C (PKC) δ-dependent mechanism...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098047/vitamin-a-deficiency-suppresses-fish-immune-function-with-differences-in-different-intestinal-segments-the-role-of-transcriptional-factor-nf-%C3%AE%C2%BAb-and-p38-mitogen-activated-protein-kinase-signalling-pathways
#7
Li Zhang, Lin Feng, Wei-Dan Jiang, Yang Liu, Pei Wu, Sheng-Yao Kuang, Ling Tang, Wu-Neng Tang, Yong-An Zhang, Xiao-Qiu Zhou
The present study investigated the effects of dietary vitamin A on immune function in the proximal intestine (PI), mid intestine (MI) and distal intestine (DI) of young grass carp (Ctenopharyngodon idella). Fish were fed graded levels of dietary vitamin A for 10 weeks, and then a challenge test using an injection of Aeromonas hydrophila was conducted for 14 d. The results showed that, compared with the optimum vitamin A level, vitamin A deficiency significantly decreased fish growth performance, increased enteritis morbidity, decreased intestinal innate humoral immune response and aggravated intestinal inflammation...
January 18, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28097849/-case-report-intestinal-perforation-by-foreign-body
#8
Karol A Martínez Portilla, Cecilia Zubiri, Norma Balcarce, Anabella Zosi, Clara I Chereau
Accidental ingestion of foreign bodies in childhood is a common event that rarely requires interventional management and presents very few complications involving surgical treatment. We present a clinical case of a 10 month old infant, without abdominal manifestations, in whom it was incidentally found a foreign radiopaque body of 7 cm in length in the abdomen, compatible with a screw. It was not possible to extract it by endoscopy. Therefore, it was necessary to perform surgery and a perforation of the second and third portion of the duodenum was encountered...
February 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28097735/autoimmune-enteropathy-and-hepatitis-in-pediatric-heart-transplant-recipient
#9
Kimberly Lewis, Ryan Butts, J Antonio Quiros, Michelle Hudspeth, Katherine Twombley, Andrew Savage, Sally Self, Ali Burnette, Shaoli Sun
AIE is a rare disorder in children that presents with severe diarrhea and malabsorption, caused by immune-mediated damage to intestinal mucosa. AIE is often associated with various syndromes of immunodeficiency including IPEX syndrome (immune dysregulation, polyendocrinopathy and enteropathy, X-linked). Dysfunctional T regulatory cells are the source of pathology in both IPEX syndrome and AIE as they are essential in maintaining tolerance to self-antigens and eliminating autoreactive B cells. This case report describes a 10-year-old cardiac transplant and total thymectomy patient on chronic immunosuppression with tacrolimus that presented with AIE and extraintestinal manifestations of cyclical hepatitis...
January 17, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28097640/priming-increases-the-anti-tumor-effect-and-therapeutic-window-of-177-lu-octreotate-in-nude-mice-bearing-human-small-intestine-neuroendocrine-tumor-got1
#10
Johanna Dalmo, Johan Spetz, Mikael Montelius, Britta Langen, Yvonne Arvidsson, Henrik Johansson, Toshima Z Parris, Khalil Helou, Bo Wängberg, Ola Nilsson, Maria Ljungberg, Eva Forssell-Aronsson
BACKGROUND: (177)Lu-[DOTA(0), Tyr(3)]-octreotate ((177)Lu-octreotate) is used for treatment of patients with somatostatin receptor (SSTR) expressing neuroendocrine tumors. However, complete tumor remission is rarely seen, and optimization of treatment protocols is needed. In vitro studies have shown that irradiation can up-regulate the expression of SSTR1, 2 and 5, and increase (177)Lu-octreotate uptake. The aim of the present study was to examine the anti-tumor effect of a (177)Lu-octreotate priming dose followed 24 h later by a second injection of (177)Lu-octreotate compared to a single administration of (177)Lu-octreotate, performed on the human small intestine neuroendocrine tumor cell line, GOT1, transplanted to nude mice...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28097368/incidence-of-and-risk-factors-for-skin-cancer-in-organ-transplant-recipients-in-the-united-states
#11
Giorgia L Garrett, Paul D Blanc, John Boscardin, Amanda Abramson Lloyd, Rehana L Ahmed, Tiffany Anthony, Kristin Bibee, Andrew Breithaupt, Jennifer Cannon, Amy Chen, Joyce Y Cheng, Zelma Chiesa-Fuxench, Oscar R Colegio, Clara Curiel-Lewandrowski, Christina A Del Guzzo, Max Disse, Margaret Dowd, Robert Eilers, Arisa Elena Ortiz, Caroline Morris, Spring K Golden, Michael S Graves, John R Griffin, R Samuel Hopkins, Conway C Huang, Gordon Hyeonjin Bae, Anokhi Jambusaria, Thomas A Jennings, Shang I Brian Jiang, Pritesh S Karia, Shilpi Khetarpal, Changhyun Kim, Goran Klintmalm, Kathryn Konicke, Shlomo A Koyfman, Charlene Lam, Peter Lee, Justin J Leitenberger, Tiffany Loh, Stefan Lowenstein, Reshmi Madankumar, Jacqueline F Moreau, Rajiv I Nijhawan, Shari Ochoa, Edit B Olasz, Elaine Otchere, Clark Otley, Jeremy Oulton, Parth H Patel, Vishal Anil Patel, Arpan V Prabhu, Melissa Pugliano-Mauro, Chrysalyne D Schmults, Sarah Schram, Allen F Shih, Thuzar Shin, Seaver Soon, Teresa Soriano, Divya Srivastava, Jennifer A Stein, Kara Sternhell-Blackwell, Stan Taylor, Allison Vidimos, Peggy Wu, Nicholas Zajdel, Daniel Zelac, Sarah T Arron
Importance: Skin cancer is the most common malignancy occurring after organ transplantation. Although previous research has reported an increased risk of skin cancer in solid organ transplant recipients (OTRs), no study has estimated the posttransplant population-based incidence in the United States. Objective: To determine the incidence and evaluate the risk factors for posttransplant skin cancer, including squamous cell carcinoma (SCC), melanoma (MM), and Merkel cell carcinoma (MCC) in a cohort of US OTRs receiving a primary organ transplant in 2003 or 2008...
January 11, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/28097227/a-xenogeneic-free-system-generating-functional-human-gut-organoids-from-pluripotent-stem-cells
#12
Hajime Uchida, Masakazu Machida, Takumi Miura, Tomoyuki Kawasaki, Takuya Okazaki, Kengo Sasaki, Seisuke Sakamoto, Noriaki Ohuchi, Mureo Kasahara, Akihiro Umezawa, Hidenori Akutsu
Functional intestines are composed of cell types from all 3 primary germ layers and are generated through a highly orchestrated and serial developmental process. Directed differentiation of human pluripotent stem cells (hPSCs) has been shown to yield gut-specific cell types; however, these structures do not reproduce critical functional interactions between cell types of different germ layers. Here, we developed a simple protocol for the generation of mature functional intestinal organoids from hPSCs under xenogeneic-free conditions...
January 12, 2017: JCI Insight
https://www.readbyqxmd.com/read/28096887/thylakoids-reduce-body-fat-and-fat-cell-size-by-binding-to-dietary-fat-making-it-less-available-for-absorption-in-high-fat-fed-mice
#13
Karin G Stenkula, Eva-Lena Stenblom, Caroline Montelius, Emil Egecioglu, Charlotte Erlanson-Albertsson
BACKGROUND: Dietary thylakoids derived from spinach have beneficial effects on body fat accumulation and blood lipids as demonstrated in humans and rodents. Important mechanisms established include delayed fat digestion in the intestine, without causing steatorrhea, and increased fatty acid oxidation in intestinal cells. The objective of our study was to elucidate if increased fecal fat excretion is an important mechanism to normalize adipose tissue metabolism during high-fat feeding in mice supplemented with thylakoids...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28096858/prevalence-of-intestinal-parasitic-infections-in-jiroft-kerman-province-iran
#14
Maryam Barkhori Mahni, Mostafa Rezaeian, Eshrat Beigom Kia, Ahmad Raeisi, Khadijeh Khanaliha, Fatemeh Tarighi, Bahare Kamranrashani
BACKGROUND: Intestinal parasitic infections have a worldwide distribution. High prevalence of intestinal parasitic infections in individuals with low socioeconomic status and environmental conditions was found. No study has ever been conducted on the prevalence of these infections in Jiroft. Therefore, in this study prevalence of intestinal parasitic infections was evaluated in Jiroft, Kerman Province, Iran. METHODS: A total of 1060 individuals from rural and urban areas of Jiroft were sampled accidentally, during 2013-2014...
April 2016: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28096853/microsporidial-spores-in-fecal-samples-of-some-domesticated-animals-living-in-giza-egypt
#15
Ahmad Z Al-Herrawy, Mahmoud A Gad
BACKGROUND: The aim of the present work was to investigate the prevalence and species of intestinal microsporidiosis among animals in Giza, Egypt. METHODS: A total of 869 animal fecal samples were collected from domesticated animals (dogs, cats, rabbits, cattle, buffaloes, sheep, goats, donkeys and pigs) living in Giza, Egypt. Spores of microsporidia were concentrated from collected samples by centrifugation and finally stained with modified trichrome (MT) stain to detect microsporidial spores...
April 2016: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28096643/intestinal-obstruction-associated-with-ovarian-remnant-in-postmenopausal-female
#16
Ridhima Gupta, Pushpender Gupta
Ovarian remnant syndrome (ORS) is a rare condition, in which the ovarian tissue is inadvertently left behind after difficult oophorectomy. The most common preexisting conditions associated for this complication include endometriosis, pelvic inflammatory disease, and prior abdominal surgery as in these conditions, removal of ovarian tissue becomes difficult. This is likely due to the presence of the dense fibrotic adhesions between an ovary and the surrounding structures. This residual ovarian tissue can become functional and cystic...
October 2016: Journal of Mid-life Health
https://www.readbyqxmd.com/read/28096577/the-effect-of-atrial-natriuretic-peptide-infusion-on-intestinal-injury-in-septic-shock
#17
Ghada F Elbaradey, Nagat Sayed Elshmaa, Hossam Hodeib
BACKGROUND AND AIMS: The aim of this study is to assess the effect of atrial natriuretic peptide (ANP) on intestinal ischemia-reperfusion injury in septic shock. MATERIAL AND METHODS: A prospective randomized controlled, observer-blinded study was carried out in surgical Intensive Care Unit (ICU), University Hospital. Forty adult patients in septic shock were randomly divided into two groups, control group (Group C) received normal saline and ANP group (Group A) patients received ANP in the form of 1...
October 2016: Journal of Anaesthesiology, Clinical Pharmacology
https://www.readbyqxmd.com/read/28096541/the-mucosal-immune-system-master-regulator-of-bidirectional-gut-brain-communications
#18
REVIEW
Nick Powell, Marjorie M Walker, Nicholas J Talley
Communication between the brain and gut is not one-way, but a bidirectional highway whereby reciprocal signals between the two organ systems are exchanged to coordinate function. The messengers of this complex dialogue include neural, metabolic, endocrine and immune mediators responsive to diverse environmental cues, including nutrients and components of the intestinal microbiota (microbiota-gut-brain axis). We are now starting to understand how perturbation of these systems affects transition between health and disease...
January 18, 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28096451/quantitative-relationships-between-lacz-mutant-frequency-and-dna-adduct-frequency-in-muta%C3%A2-mouse-tissues-and-cultured-cells-exposed-to-3-nitrobenzanthrone
#19
Paul A White, George R Douglas, David H Phillips, Volker M Arlt
The frequency of stable DNA adducts in a target tissue can be used to assess biologically effective dose; however, the utility of the metric in a risk assessment context depends on the likelihood that the DNA damage will be manifested as mutation. Previously, we employed the Muta™Mouse system to examine the induction of lacZ mutants and DNA adducts following exposure to the well-studied mutagenic carcinogen 3-nitrobenzanthrone (3-NBA). In this follow-up work, we examined the empirical relationships between total adduct frequency and mutant frequency (MF) in tissues and cultured cells following acute 3-NBA exposure...
January 16, 2017: Mutagenesis
https://www.readbyqxmd.com/read/28096432/effects-of-activity-genetic-selection-and-their-interaction-on-muscle-metabolic-capacities-and-organ-masses-in-mice
#20
Scott A Kelly, Fernando R Gomes, Erik M Kolb, Jessica L Malisch, Theodore Garland
Chronic voluntary exercise elevates total daily energy expenditure (DEE) and food consumption, potentially resulting in organ compensation supporting nutrient extraction/utilization. Additionally, species with naturally higher DEE often have larger processing organs, which may represent genetic differences and/or phenotypic plasticity. We tested for possible adaptive changes in organ masses of 4 replicate lines of house mice selected (37 generations) for high running (HR lines) compared with 4 non-selected control (C) lines...
January 17, 2017: Journal of Experimental Biology
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