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https://www.readbyqxmd.com/read/29672174/th9-cells-probable-players-in-ulcerative-colitis-pathogenesis
#1
Mojtaba Shohan, Shokrollah Elahi, Hedayatollah Shirzad, Mahmoud Rafieian-Kopaei, Nader Bagheri, Emad Soltani
T lymphocytes represent an important part of adaptive immune system undertaking different functions to regulate immune responses. CD4+ T cells are the most important activator cells in inflammatory conditions. Depending on the type of induced cells and inflamed sites, expression and activity of different subtypes of helper T cells are changed. Recent studies have confirmed the existence of a new subset of helper T lymphocytes called Th9. Naive T cells can differentiate into Th9 subtypes if they are exposed simultaneously by interleukin (IL) 4 and transforming growth factor β and also secondary activation of a complicated network of transcription factors such as interferon regulatory factor 4 (IRF4) and Smads which are essential for adequate induction of this phenotype...
April 19, 2018: International Reviews of Immunology
https://www.readbyqxmd.com/read/29672155/an-endogenous-aryl-hydrocarbon-receptor-ahr-ligand-ite-induces-regulatory-t-cells-tregs-and-ameliorates-experimental-colitis
#2
Jessicca D Abron, Narendra P Singh, Manoj K Mishra, Robert L Price, Mitzi Nagarkatti, Prakash S Nagarkatti, Udai P Singh
Inflammatory bowel disease (IBD) is a chronic intestinal inflammatory condition that affects millions of people with high morbidity and health-care cost. The precise etiology of IBD is unknown, but clear evidence suggests that intestinal inflammation is caused by an excessive immune response to mucosal antigens. Recent studies have shown that activation of the aryl hydrocarbon receptor (AhR) induces regulatory T cells (Tregs) and suppresses autoimmune diseases. In the current study, we investigated if nontoxic ligand of AhR, 2-(1'H-indole-3'-carbonyl)-thiazole-4-carboxylic acid methyl ester (ITE), can attenuate dextran sodium sulphate (DSS)-induced colitis...
April 19, 2018: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/29668955/what-is-the-risk-of-progressive-multifocal-leukoencephalopathy-in-patients-with-ulcerative-colitis-or-crohn-s-disease-treated-with-vedolizumab
#3
Timothy Card, Jing Xu, Huifang Liang, Fatima Bhayat
Background: Progressive multifocal leukoencephalopathy is a serious condition linked to certain diseases and immunosuppressant therapies, including the α4 integrin antagonist natalizumab. No cases have been reported to date with vedolizumab, a selective antagonist of the α4β7 integrin expressed on gut-homing lymphocytes. This analysis aimed to describe the current and future expected occurrence of progressive multifocal leukoencephalopathy with vedolizumab use, were the risk the same as in other populations in which this disease has been studied...
April 13, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29666981/an-early-life-mucosal-insult-temporarily-decreases-acute-oxazolone-induced-inflammation-in-mice
#4
Katja M Bendtsen, Peter Tougaard, Axel K Hansen
Inflammatory priming of immune cells in early life may optimize the response to a subsequent inflammatory challenge later in life. To prime the immune cells in the gut in vivo through a short inflammatory insult, we administered a low dose of dextran sulfate sodium (DSS) to 5-weeks-old BALB/c mice in the drinking water. We hypothesized that DSS-primed mice would show decreased inflammation and difference in immunological profiling, when subjected to presensitizing and oxazolone-induced colitis by rectal instillation at 9 weeks compared to non-DSS-primed control mice...
April 18, 2018: Inflammation
https://www.readbyqxmd.com/read/29666308/estrogen-receptor-%C3%AE-contributes-to-t-cell-mediated-autoimmune-inflammation-by-promoting-t-cell-activation-and-proliferation
#5
Imran Mohammad, Inna Starskaia, Tamas Nagy, Jitao Guo, Emrah Yatkin, Kalervo Väänänen, Wendy T Watford, Zhi Chen
It has long been appreciated that most autoimmune disorders are characterized by increased prevalence in females, suggesting a potential role for sex hormones in the etiology of autoimmunity. To study how estrogen receptor α (ERα) contributes to autoimmune diseases, we generated mice in which ERα was deleted specifically in T lymphocytes. We found that ERα deletion in T cells reduced their pathogenic potential in a mouse model of colitis and correlated with transcriptomic changes that affected T cell activation...
April 17, 2018: Science Signaling
https://www.readbyqxmd.com/read/29624512/gastrointestinal-tract-vasculopathy-clinicopathology-and-description-of-a-possible-new-entity-with-protean-features
#6
Christine Y Louie, Michael A DiMaio, Gregory W Charville, Gerald J Berry, Teri A Longacre
Noninfectious gastrointestinal (GI) vasculopathic disorders are rare and are often overlooked in histopathologic examination or when forming differential diagnoses due to their rarity. However, involvement of the GI tract may lead to serious complications, including ischemia and perforation. Since awareness of the types of vasculopathy that may involve the GI tract is central to arriving at a correct diagnosis, we reviewed our institutional experience with GI tract vasculopathy in order to enhance diagnostic accuracy of these rare lesions...
April 5, 2018: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29616750/comparison-of-two-models-of-inflammatory-bowel-disease-in-rats
#7
Cristina Sorina Catana, Cristian Magdas, Flaviu Alexandru Tabaran, Elena Cristina Crăciun, Georgiana Deak, Virginia Ana Magdaş, Vasile Cozma, Călin Mircea Gherman, Ioana Berindan-Neagoe, Dan Lucian Dumitraşcu
BACKGROUND: There is a need for experimental animal models for inflammatory bowel diseases (IBD), but no proposed model has been unanimously accepted. OBJECTIVES: The aim of this study was to develop 2 affordable models of IBD in rats and to compare them. MATERIAL AND METHODS: We produced IBD in rats using either dextran sodium sulfate (DSS) or 2, 4, 6-trinitrobenzene sulfonic acid (TNBS). The requirements for experimental models were: a predictable clinical course, histopathology and inflammation similar to human ulcerative colitis (UC) and Crohn's disease (CD)...
March 26, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29610757/the-subtypes-of-microscopic-colitis-from-a-pathologist-s-perspective-past-present-and-future
#8
Peter Johan Heiberg Engel, Anne-Marie Kanstrup Fiehn, Lars Kristian Munck, Martin Kristensson
Microscopic colitis (MC) is a chronic inflammatory bowel disease, encompassing a triad of chronic diarrhea, normal endoscopy and characteristic histological findings. MC embraces two histological subtypes described as lymphocytic colitis (LC) and collagenous colitis (CC). The diagnostic criteria of MC were established several years ago and the histological description of LC and CC was based almost exclusively on heamatoxylin-eosin (HE) stained sections. Since the establishment of the diagnostic criteria, important changes have occurred in the concept and diagnostic methods of MC: the emergence of the entity "microscopic colitis incomplete" (MCi), comprising collagenous colitis incomplete (CCi) and lymphocytic colitis incomplete (LCi) and pathologists' increasing use of special stains in everyday diagnostics...
February 2018: Annals of Translational Medicine
https://www.readbyqxmd.com/read/29606936/vedolizumab-as-a-potential-culprit-in-the-development-of-ovarian-teratoma
#9
Judy A Trieu, Mohammad Bilal, Gurinder Luthra
Vedolizumab is a new humanized monoclonal antibody that has been reserved for those with moderate-to-severe Crohn's disease and ulcerative colitis who have failed immunomodulator and TNF-α antagonist therapy, and for those who have an increased risk for developing progressive multifocal leukoencephalopathy. Because it targets gastrointestinal tract-specific lymphocytes, meta-analyses and integrated studies have shown that vedolizumab causes fewer extraintestinal adverse effects, such as opportunistic infections and malignancies, compared with anti-TNF therapies...
September 2017: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/29603368/oral-budesonide-in-gastrointestinal-and-liver-disease-a-practical-guide-for-the-clinician
#10
REVIEW
Stephan Miehlke, Manuel Barreiro-de Acosta, Gerd Bouma, Daniel Carpio, Fernando Magro, Tom Moreels, Chris Probert
Oral budesonide is a second- generation steroid which allows local, selective treatment of the gastrointestinal tract and the liver, minimizing systemic exposure. The results of randomized trials comparing budesonide versus placebo or active comparators have led to expert recommendations that budesonide be used to treat mild or moderate active ileocecal Crohn's disease, microscopic colitis (including both collagenous and lymphocytic colitis), ulcerative colitis and non-cirrhotic autoimmune hepatitis. The mechanism of budesonide action obviates the need for dose tapering due to safety reasons after induction therapy...
March 30, 2018: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29601644/review-article-nonclinical-and-clinical-pharmacology-pharmacokinetics-and-pharmacodynamics-of-etrolizumab-an-anti-%C3%AE-7-integrin-therapy-for-inflammatory-bowel-disease
#11
REVIEW
M T Tang, M E Keir, R Erickson, E G Stefanich, F K Fuh, T Ramirez-Montagut, J M McBride, D M Danilenko
BACKGROUND: Novel treatments with superior benefit-risk profiles are needed to improve the long-term prognosis of patients with inflammatory bowel disease (IBD). Etrolizumab-a monoclonal antibody that specifically targets β7 integrins-is currently under phase III clinical evaluation in IBD. AIM: This review summarises the available pharmacological and pharmacokinetic/pharmacodynamic data for etrolizumab to provide a comprehensive understanding of its mechanism of action (MOA) and pharmacological effects...
March 30, 2018: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29596895/microscopic-ileitis-in-diverted-and-non-diverted-enteric-segments-an-under-recognized-condition-with-a-multifactorial-etiology
#12
Chunlai Zuo, Zhiyan Fu, Edward C Lee, Llewellyn Foulke, Gloria Q Young, David Cubero Rego, Hwajeong Lee
Microscopic ileitis has been infrequently reported in the literature with the few reported cases usually associated with concurrent microscopic colitis. Having encountered a case of collagenous ileitis involving the diverted distal limb of a loop ileostomy and sparing the proximal limb, we examined additional cases of loop ileostomy, end ileostomy, colostomy, and the accompanying diverted colorectal segment for features of microscopic ileitis and colitis. A total of 101 cases of diverted and non-diverted enteric segments were examined from 37 loop ileostomies, 16 end ileostomies and 12 colostomies status post Hartmann's procedure...
March 26, 2018: Human Pathology
https://www.readbyqxmd.com/read/29593893/identifying-and-managing-the-adverse-effects-of-immune-checkpoint-blockade
#13
REVIEW
Arthur Winer, J Nicholas Bodor, Hossein Borghaei
Immunotherapy has revolutionized the field of oncology. By inhibiting the cytotoxic T-lymphocyte-associated protein (CTLA-4) and programmed death-1 (PD-1) immune checkpoint pathways, multiple studies have demonstrated greatly improved survival in locally advanced and metastatic cancers including melanoma, renal, lung, gastric, and hepatocellular carcinoma. Trials in other malignancies are ongoing, and undoubtedly the number of drugs in this space will grow beyond the six currently approved by the Food and Drug Administration...
February 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29567622/th9-lymphocytes-and-functions-of-interleukin-9-with-the-focus-on-ibd-pathology
#14
REVIEW
Krzysztof Matusiewicz, Barbara Iwańczak, Małgorzata Matusiewicz
The work presents the newest knowledge on a new phenotype of T helper lymphocytes (Th9) and on Interleukin 9 (IL-9). Processes leading to transformation of naïve T lymphocyte into Th9 lymphocytes are presented, including the role of IL-4 and TGFβ signaling. Involvement of transcription factor network in production of IL-9 is described. Other cells capable of expressing IL-9 and secreting IL-9 are portrayed. Diversity of IL-9 effects caused by activation of IL-9 receptors on various types of cells is presented...
March 19, 2018: Advances in Medical Sciences
https://www.readbyqxmd.com/read/29557695/does-neutrophil-lymphocyte-ratio-have-good-diagnostic-value-in-neonatal-necrotizing-colitis
#15
Yang Yang, Zhao-Lan Cao, Xiao-Yu Zhou, Xiao-Qing Chen, Jing-Jing Pan, Rui Cheng
OBJECTIVE: The diagnostic value of neutrophil / lymphocyte (N/L) ratio in the early diagnosis of neonatal necrotizing colitis (NEC) was evaluated. METHODS: This is a cross-sectional study. From the 103 NEC cases, the preterm infants were randomly recruited into this study, including NEC I 41 cases, NEC II 34 cases and NEC III 28 cases. The control group included 58 preterm infants without NEC. Routine clinical data and blood samples of all NEC patients were collected within 24 hours after the established diagnosis of NEC...
March 20, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29552542/combination-of-ipilimumab-and-adoptive-cell-therapy-with-tumor-infiltrating-lymphocytes-for-patients-with-metastatic-melanoma
#16
John E Mullinax, MacLean Hall, Sangeetha Prabhakaran, Jeffrey Weber, Nikhil Khushalani, Zeynep Eroglu, Andrew S Brohl, Joseph Markowitz, Erica Royster, Allison Richards, Valerie Stark, Jonathan S Zager, Linda Kelley, Cheryl Cox, Vernon K Sondak, James J Mulé, Shari Pilon-Thomas, Amod A Sarnaik
Purpose: Adoptive cell therapy (ACT) using tumor-infiltrating lymphocytes (TIL) for metastatic melanoma can be highly effective, but attrition due to progression before TIL administration (32% in prior institutional experience) remains a limitation. We hypothesized that combining ACT with cytotoxic T lymphocyte-associated antigen 4 blockade would decrease attrition and allow more patients to receive TIL. Experimental design: Thirteen patients with metastatic melanoma were enrolled...
2018: Frontiers in Oncology
https://www.readbyqxmd.com/read/29548809/expression-and-location-of-il-17a-e-f-and-their-receptors-in-colorectal-adenocarcinoma-comparison-with-benign-intestinal-disease
#17
Yanbo Liu, Xuemei Sun, Xiaohui Zhao, Liping An, Zhuxing Wang, Jing Jiang, Weigao Shen, Xueliang Yang, Ying Sun
The research aimed to investigate secretion, expression and location of IL-17 relative ligands, IL-17 relative receptors, infiltrating inflammatory cells and parenchymal structural cells in colorectal cancer (CRC) compared with ulcerative colitis (UC) and benign hyperplastic polyp. 29 human intestinal tissues with CRC, 17 with UC and 7 with polyp were stained using immunohistochemistry to evaluate immunoreactivity for IL-17 family relative ligands including IL-17A, E, F and their respective relative receptors such as IL-17RA, IL-17RB and IL-17RC...
March 7, 2018: Pathology, Research and Practice
https://www.readbyqxmd.com/read/29546806/microscopic-colitis-in-patients-with-ulcerative-colitis-or-crohn-s-disease-a-retrospective-observational-study-and-review-of-the-literature
#18
Anna Wickbom, Johan Bohr, Nils Nyhlin, Anders Eriksson, Annika Lapidus, Andreas Münch, Kjell-Arne Ung, Lina Vigren, Åke Öst, Curt Tysk
OBJECTIVES: Onset of microscopic colitis (MC) in patients with ulcerative colitis (UC) or Crohn's disease (CD), or vice versa, has been reported occasionally but the subject is not well described. We therefore report a retrospective observational study of such patients and review the literature. METHODS: Forty-six Swedish gastroenterology clinics were contacted about patients with diagnoses of both inflammatory bowel disease (IBD) and MC. Publications were searched on PubMed...
March 16, 2018: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/29545957/refractory-abdominal-pain-in-a-patient-with-chronic-lymphocytic-leukemia-be-wary-of-acquired-angioedema-due-to-c1-esterase-inhibitor-deficiency
#19
Abdullateef Abdulkareem, Ryan S D'Souza, Joshua Mundorff, Pragya Shrestha, Oluwaseun Shogbesan, Anthony Donato
Acquired angioedema due to C1 inhibitor deficiency (C1INH-AAE) is a rare and potentially fatal syndrome of bradykinin-mediated angioedema characterized by episodes of angioedema without urticaria. It typically manifests with nonpitting edema of the skin and edema in the gastrointestinal (GI) tract mucosa or upper airway. Edema of the upper airway and tongue may lead to life-threatening asphyxiation. C1INH-AAE is typically under-diagnosed because of its rarity and its propensity to mimic more common abdominal conditions and allergic reactions...
2018: Case Reports in Hematology
https://www.readbyqxmd.com/read/29541900/immunohistochemical-assessment-of-cd30-lymphocytes-in-the-intestinal-mucosa-facilitates-diagnosis-of-pediatric-ulcerative-colitis
#20
Ondrej Fabian, Ondrej Hradsky, Tereza Drskova, Filip Mikus, Josef Zamecnik, Jiri Bronsky
BACKGROUND: Diagnosis of pediatric inflammatory bowel diseases (IBD) remains challenging. We aimed at the value of immunohistochemical assessment of CD30+ lymphocytes in the intestinal mucosa in differential diagnosis between pediatric Crohn's disease (CD) and ulcerative colitis (UC) and its utility as a predictor of future differentiation in patients with IBD unclassified (IBDU). METHODS: Seventy-four treatment naive pediatric patients with IBD (33 CD, 30 UC and 11 IBDU) were enrolled into the study...
March 14, 2018: Digestive Diseases and Sciences
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