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https://www.readbyqxmd.com/read/29788407/deregulation-of-sgk1-in-ulcerative-colitis-a-paradoxical-relationship-between-immune-cells-and-colonic-epithelial-cells
#1
Rocco Spagnuolo, Vincenzo Dattilo, Lucia D'Antona, Cristina Cosco, Rossana Tallerico, Valeria Ventura, Francesco Conforti, Caterina Camastra, Rosellina M Mancina, Giada Catalogna, Vincenzo Cosco, Rodolfo Iuliano, Ennio Carbone, Nicola Perrotti, Rosario Amato, Patrizia Doldo
Background: Inflammatory bowel disease (IBD) is due to the interaction of genetic and environmental factors that trigger an unbalanced immune response ultimately resulting in the peculiar inflammatory reaction. Experimental models of IBD point to a role of T-cell-derived cytokines (Th17) and to SGK1 as mediator of the Th17 switch. We hypothesize that SGK1, a salt inducible kinase, directs lymphocytic behavior and tissue damage. Methods: Eleven controls and 32 ulcerative colitis (UC) patients were randomized according to endoscopic Mayo score...
May 18, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29788266/dietary-magnesium-alleviates-experimental-murine-colitis-through-upregulation-of-the-transient-receptor-potential-melastatin-6-channel
#2
Valentina Trapani, Valentina Petito, Angelica Di Agostini, Daniela Arduini, Willem Hamersma, Giuseppe Pietropaolo, Francesca Luongo, Vincenzo Arena, Egidio Stigliano, Loris R Lopetuso, Antonio Gasbarrini, Federica I Wolf, Franco Scaldaferri
Background: Magnesium (Mg) is essential for human health and is absorbed mainly in the intestine. In view of the likely occurrence of an Mg deficit in inflammatory bowel disease (IBD) and the documented role of Mg in modulating inflammation, the present study addresses whether Mg availability can affect the onset and progression of intestinal inflammation. Methods: To study the correlation between Mg status and disease activity, we measured magnesemia by atomic absorption spectroscopy in a cohort of IBD patients...
May 18, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29788098/helicobacter-pylori-colonization-protects-against-chronic-experimental-colitis-by-regulating-th17-treg-balance
#3
Hongchen Zhang, Yun Dai, Yun Liu, Ting Wu, Jing Li, Xiaolei Wang, Weihong Wang
Background: Epidemiological studies have demonstrated an inverse association between Helicobacter pylori infection and the risk of developing inflammatory bowel disease (IBD). The mechanisms by which H. pylori infection protects against IBD are unclear. Here, we explored the possible protective effects and mechanisms of gastric H. pylori colonization on a chronic colitis model, with focus on whether H. pylori exerted its effects through regulating Th17/Treg immune responses. Methods: Chronic colitis was induced by dextran sulfate sodium (DSS) treatment...
May 17, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29785192/-panax-notoginseng-promotes-repair-of-colonic-microvascular-injury-in-sprague-dawley-rats-with-experimental-colitis
#4
Shiying Wang, Ping Tao, Lei Zhao, Wangjun Zhang, Hongyi Hu, Jiang Lin
To investigate the therapeutic effects of PN on intestinal inflammation and microvascular injury and its mechanisms, dextran sodium sulfate- (DSS-) or iodoacetamide- (IA-) induced rat colitis models were used. After colitis model was established, PN was orally administered for 7 days at daily dosage of 1.0 g/kg. Obvious colonic inflammation and mucosal injuries and microvessels were observed in DSS- and IA-induced colitis groups. DAI scores, serum concentrations of VEGFA121, VEGFA165, VEGFA165/VEGFA121, IL-6, and TNF- α , and expression of Rap1GAP and TSP1 proteins in the colon were significantly higher while serum concentrations of IL-4 and IL-10 and MVD in colon were significantly lower in the colitis model groups than in the normal control group...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29784012/treatment-of-experimental-colitis-by-endometrial-regenerative-cells-through-regulation-of-b-lymphocytes-in-mice
#5
Xiaoxi Xu, Yong Wang, Baoren Zhang, Xu Lan, Shanzheng Lu, Peng Sun, Xiang Li, Ganggang Shi, Yiming Zhao, Hongqiu Han, Caigan Du, Hao Wang
BACKGROUND: Endometrial regenerative cells (ERCs), a novel type of mesenchymal-like stem cell derived from menstrual blood, have been recently evaluated as an attractive candidate source in ulcerative colitis (UC); however, the mechanism is not fully understood. The present study was designed to investigate the effects of ERCs, especially on B-cell responses in UC. METHODS: In this study, colitis was induced by administering 3% dextran sodium sulfate (DSS) via free drinking water for 7 days to BALB/c mice...
May 22, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29774025/co-stimulation-impaired-bone-marrow-derived-dendritic-cells-prevent-dextran-sodium-sulfate-induced-colitis-in-mice
#6
Carl Engman, Yesica Garciafigueroa, Brett Eugene Phillips, Massimo Trucco, Nick Giannoukakis
Dendritic cells (DC) are important in the onset and severity of inflammatory bowel disease (IBD). Tolerogenic DC induce T-cells to become therapeutic Foxp3+ regulatory T-cells (Tregs). We therefore asked if experimental IBD could be prevented by administration of bone marrow-derived DC generated under conventional GM-CSF/IL-4 conditions but in the presence of a mixture of antisense DNA oligonucleotides targeting the primary transcripts of CD40, CD80, and CD86. These cell products (which we call AS-ODN BM-DC) have demonstrated tolerogenic activity in preventing type 1 diabetes and preserving beta cell mass in new-onset type 1 diabetes in the NOD mouse strain, in earlier studies...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29773813/amelioration-of-experimental-autoimmune-encephalomyelitis-and-dss-induced-colitis-by-ntg-a-009-through-the-inhibition-of-th1-and-th17-cells-differentiation
#7
Suman Acharya, Maheshwor Timilshina, Liyuan Jiang, Sabita Neupane, Dong-Young Choi, Sang Won Park, Sang Yeul Lee, Byeong-Seon Jeong, Jung-Ae Kim, Tae-Gyu Nam, Jae-Hoon Chang
CD4+ T cells are the central for the mammalian adaptive immune system. Naïve CD4+ T cells mainly differentiate in to pro-inflammatory Th1, Th2 and Th17 cells upon antigenic stimulation. IFN-γ secreting Th1 cells and IL-17 secreting Th17 cells are found to play key roles in autoimmune diseases like multiple sclerosis (MS) and ulcerative colitis (UC). In this study we found NTG-A-009, 6-aminopyridin-3-ol, has great inhibitory effect on in vitro differentiation of Th1 and Th17 cells without affecting regulatory T cells...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29760543/microbiota-modification-by-probiotic-supplementation-reduces-colitis-associated-colon-cancer-in-mice
#8
Maria Carolina S Mendes, Daiane Sm Paulino, Sandra R Brambilla, Juliana A Camargo, Gabriela F Persinoti, José Barreto C Carvalheira
AIM: To investigate the effect of probiotic supplementation during the development of an experimental model of colitis associated colon cancer (CAC). METHODS: C57BL/6 mice received an intraperitoneal injection of azoxymethane (10 mg/kg), followed by three cycles of sodium dextran sulphate diluted in water (5% w/v). Probiotic group received daily a mixture of Lactobacillus acidophilus , Lactobacillus rhamnosus and Bifidobacterium bifidum . Microbiota composition was assessed by 16S rRNA Illumina HiSeq sequencing...
May 14, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29752571/w-e-w-roediger-causative-factors-of-ulcerative-colitis-and-crohn-s-disease-an-exploratory-guide-wakefield-press-2016-reprinted-2017-106-pp-isbn-978-174305-433-8
#9
Michael W Whitehouse
This monograph provides the background for new developments in gastroenterological pharmacology, particularly focussing on the two chronic inflammatory bowel diseases, ulcerative colitis (UC) and Crohn's disease (CD). These currently cause significant morbidity but largely elude satisfactory treatment. This is a challenge to drug designers and experimental physiologists alike. Their efforts will be much enhanced by further understanding the aspects of molecular pathogenesis and physiological dysregulation outlined in this valuable and timely survey...
May 11, 2018: Inflammopharmacology
https://www.readbyqxmd.com/read/29745777/current-experimental-and-future-treatments-in-inflammatory-bowel-disease-a-clinical-review
#10
Christian L Hvas, Mia Bendix, Anders Dige, Jens F Dahlerup, Jørgen Agnholt
Inflammatory bowel diseases (IBDs) may result from dysregulated mucosal immune responses directed toward the resident intestinal microbiota. This review describes the hallmark immunobiology of Crohn's disease and ulcerative colitis as well as therapeutic targets and mechanisms of action for current, experimental, and future treatments in IBD. Conventional therapies include 5-aminosalicylic acid, glucocorticosteroids, thiopurines, and methotrexate. Since 1997, monoclonal antibodies have gained widespread use...
May 10, 2018: Immunopharmacology and Immunotoxicology
https://www.readbyqxmd.com/read/29744610/walnut-phenolic-extract-inhibits-nuclear-factor-kappab-signaling-in-intestinal-epithelial-cells-and-ameliorates-experimental-colitis-and-colitis-associated-colon-cancer-in-mice
#11
Seong-Joon Koh, Youn-I Choi, Yuri Kim, Yoo-Sun Kim, Sang Woon Choi, Ji Won Kim, Byeong Gwan Kim, Kook Lae Lee
PURPOSE: Walnuts (Juglans regia) are known to have anti-cancer and immunomodulatory effects. However, little information is available on the effects of walnut phenolic extract (WPE) on intestinal inflammation and colitis-associated colon cancer. METHODS: COLO205 cells were pretreated with WPE and then stimulated with tumor necrosis factor (TNF)-α. In the acute colitis model, wild type mice (C57BL/6) were administered 4% dextran sulfate sodium (DSS) for 5 days. In the chronic colitis model, interleukin (IL)-10-/- mice were administered with either the vehicle or WPE (20 mg/kg) by oral gavage daily for 2 weeks...
May 9, 2018: European Journal of Nutrition
https://www.readbyqxmd.com/read/29740735/dandelion-root-extract-protects-ncm460-colonic-cells-and-relieves-experimental-mouse-colitis
#12
Aiguo Ding, Xianhui Wen
The protective potential of dandelion on acute hepatitis, lung injury and colorectal cancer has recently been revealed. Importantly, ulcerative colitis (UC), a clinically defined inflammatory bowel disease, accelerates the risk of colorectal cancer. However, studies focusing on the activity of dandelion on UC are extremely limited. In the present study, we found that an aqueous extract of dandelion root increases cell viability and decreases apoptosis in dextran sodium sulfate (DSS)-incubated NCM460 human colonic epithelial cells, probably through removing the production of reaction oxygen species and blocking nuclear factor-kappaB signaling...
May 8, 2018: Journal of Natural Medicines
https://www.readbyqxmd.com/read/29740348/could-sodium-chloride-be-an-environmental-trigger-for-immune-mediated-diseases-an-overview-of-the-experimental-and-clinical-evidence
#13
REVIEW
Eric Toussirot, Matthieu Béreau, Charline Vauchy, Philippe Saas
Immune mediated diseases (IMDs) are complex chronic inflammatory diseases involving genetic and environmental factors. Salt intake has been proposed as a diet factor that can influence the immune response. Indeed, experimental data report the influence of sodium chloride on the differentiation of naive CD4+ T cells into IL-17 secreting T helper (Th) cells (Th17 cells), by a mechanism involving the serum glucocorticoid kinase-1 (SGK1) that promotes the expression of the IL-23 receptor (IL-23R). The IL-23/IL-23R is critical for pathogenic inflammatory Th17 cell differentiation...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29738575/adoptive-transfer-of-dendritic-cells-expressing-cd11c-reduces-the-immunological-response-associated-with-experimental-colitis-in-balb-c-mice
#14
Lisiery N Paiatto, Fernanda G D Silva, Áureo T Yamada, Wirla M S C Tamashiro, Patricia U Simioni
INTRODUCTION: In addition to conventional therapies, several new strategies have been proposed for modulating autoimmune diseases, including the adoptive transfer of immunological cells. In this context, dendritic cells (DCs) appear to be one of the most promising treatments for autoimmune disorders. The present study aimed to evaluate the effects of adoptive transfer of DCs obtained from both naïve and ovalbumin (OVA)-tolerant mice on the severity of TNBS induced colitis and analyze the eventual protective mechanisms...
2018: PloS One
https://www.readbyqxmd.com/read/29731832/costus-root-granules-improve-ulcerative-colitis-through-regulation-of-tgf-%C3%AE-mediation-of-the-pi3k-akt-signaling-pathway
#15
Xiaohong Wang, Dan Li, Yong Zhang, Shuang Wu, Fang Tang
Ulcerative colitis is a chronic nonspecific inflammatory disease that occurs in the colon and rectum. Costus root is a type of traditional Chinese medicine that exhibits antibacterial properties and serves an inhibitory role in the regeneration of gut bacteria. However, the molecular mechanisms underlying Costus root-mediated improvements in ulcerative colitis remain unclear. A complex formula of Costus root granules was created and investigated in the present study for its therapeutic effects in a rat model of ulcerative colitis...
May 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29728388/fecal-microbiota-transplantation-in-experimental-ulcerative-colitis-reveals-associated-gut-microbial-and-host-metabolic-reprogramming
#16
Zhixiang Yan, Xue-Jiao Gao, Ting Li, Bin Wei, Panpan Wang, Ying Yang, Ru Yan
Fecal microbiota transplantation (FMT) is gaining attention for the treatment of ulcerative colitis (UC). Data from individual case studies have suggested that FMT may be beneficial for UC but the detailed microbial and molecular basis remains unknown. Here, we employ 16S rRNA gene sequencing and metabolomics to investigate the influence of FMT on gut microbial community composition and host metabolism in the dextran sulfate sodium (DSS) induced UC rat model. The findings from this pilot study suggest that FMT from normal donors to UC recipients could alleviate UC symptoms without close resemblance of donor's gut microbial and metabolic pattern...
May 4, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29710854/frondanol-a-nutraceutical-extract-from-cucumaria-frondosa-attenuates-colonic-inflammation-in-a-dss-induced-colitis-model-in-mice
#17
Sandeep B Subramanya, Sanjana Chandran, Saeeda Almarzooqi, Vishnu Raj, Aisha Salem Al Zahmi, Radeya Ahmed Al Katheeri, Samira Ali Al Zadjali, Peter D Collin, Thomas E Adrian
Frondanol is a nutraceutical lipid extract of the intestine of the edible Atlantic sea cucumber, Cucumaria frondosa, with potent anti-inflammatory effects. In the current study, we investigated Frondanol as a putative anti-inflammatory compound in an experimental model of colonic inflammation. C57BL/6J male black mice (C57BL/6J) were given 3% dextran sodium sulfate (DSS) in drinking water for 7 days to induce colitis. The colitis group received oral Frondanol (100 mg/kg body weight/per day by gavage) and were compared with a control group and the DSS group...
April 30, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29710467/antioxidant-and-anti-inflammatory-effect-of-plumieride-in-dextran-sulfate-sodium-induced-colitis-in-mice
#18
Thaise Boeing, Priscila de Souza, Tiago José Bonomini, Luísa Nathália Bolda Mariano, Lincon Bordignon Somensi, Ruth Meri Lucinda, Angela Malheiros, Luísa Mota da Silva, Sérgio Faloni de Andrade
This study aimed to investigate the potential effect of plumieride, an iridoid glycoside isolated from Alamanda cathartica L. flowers, against dextran sulfate sodium (DSS)-induced colitis in mice. Colitis was induced in female swiss mice by adding DSS 3% to the drinking water. The animals were treated with vehicle (water), 5-aminosalicylic acid (100?mg/kg) or plumieride (10, 30 and 100?mg/kg) once a day, during 7 days. The body weight progression and the disease activity index was evaluated daily. On the eighth day, colons were collected for the measurement of the size, histological, histochemical, biochemical and inflammatory analysis...
March 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29709917/knockout-of-ceramide-kinase-aggravates-pathological-and-lethal-responses-in-mice-with-experimental-colitis
#19
Satomi Suzuki, Ai Tanaka, Hiroyuki Nakamura, Toshihiko Murayama
Sphingolipids and their metabolic enzymes are implicated in ulcerative colitis. Ceramide kinase (CerK) catalyzes the phosphorylation of ceramide to ceramide-1-phosphate (C1P). Previous studies showed the activation of CerK by the pro-inflammatory cytokine interleukin-1β, the C1P-induced up-regulation of prostanoids exerting protective effects against colitis, and the C1P-induced down-regulation of the pro-inflammatory cytokine tumor necrosis factor-α. In order to elucidate CerK/C1P functions in colitis, we examined the severity of dextran sodium sulfate (DSS)-induced colitis in wild-type (WT) and CerK deletion (CerK(-/-) ) mice...
2018: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29702245/female-mice-carrying-a-defective-alox15-gene-are-protected-from-experimental-colitis-via-sustained-maintenance-of-the-intestinal-epithelial-barrier-function
#20
Saskia Kroschwald, Cheng-Ying Chiu, Dagmar Heydeck, Nadine Rohwer, Tatjana Gehring, Ulrike Seifert, Anke Lux, Michael Rothe, Karsten-Henrich Weylandt, Hartmut Kuhn
Lipoxygenases (ALOX) are involved in the regulation of cellular redox homeostasis. They also have been implicated in the biosynthesis of pro- and anti-inflammatory lipid mediators and play a role in the pathogenesis of inflammatory diseases, which constitute a major health challenge owing to increasing incidence and prevalence in all industrialized countries around the world. To explore the pathophysiological role of Alox15 (leukocyte-type 12-LOX) in mouse experimental colitis we tested the impact of systemic inactivation of the Alox15 gene on the extent of dextrane sulfate sodium (DSS) colitis...
April 24, 2018: Biochimica et Biophysica Acta
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