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https://www.readbyqxmd.com/read/29196621/remodelling-of-the-gut-microbiota-by-hyperactive-nlrp3-induces-regulatory-t-cells-to-maintain-homeostasis
#1
Xiaomin Yao, Chenhong Zhang, Yue Xing, Guang Xue, Qianpeng Zhang, Fengwei Pan, Guojun Wu, Yingxin Hu, Qiuhong Guo, Ailing Lu, Xiaoming Zhang, Rongbin Zhou, Zhigang Tian, Benhua Zeng, Hong Wei, Warren Strober, Liping Zhao, Guangxun Meng
Inflammasomes are involved in gut homeostasis and inflammatory pathologies, but the role of NLRP3 inflammasome in these processes is not well understood. Cryopyrin-associated periodic syndrome (CAPS) patients with NLRP3 mutations have autoinflammation in skin, joints, and eyes, but not in the intestine. Here we show that the intestines of CAPS model mice carrying an Nlrp3 R258W mutation maintain homeostasis in the gut. Additionally, such mice are strongly resistant to experimental colitis and colorectal cancer; this is mainly through a remodelled gut microbiota with enhanced anti-inflammatory capacity due to increased induction of regulatory T cells (Tregs)...
December 1, 2017: Nature Communications
https://www.readbyqxmd.com/read/29174402/commensal-fungi-recapitulate-the-protective-benefits-of-intestinal-bacteria
#2
Tony T Jiang, Tzu-Yu Shao, W X Gladys Ang, Jeremy M Kinder, Lucien H Turner, Giang Pham, Jordan Whitt, Theresa Alenghat, Sing Sing Way
Commensal intestinal microbes are collectively beneficial in preventing local tissue injury and augmenting systemic antimicrobial immunity. However, given the near-exclusive focus on bacterial species in establishing these protective benefits, the contributions of other types of commensal microbes remain poorly defined. Here, we show that commensal fungi can functionally replace intestinal bacteria by conferring protection against injury to mucosal tissues and positively calibrating the responsiveness of circulating immune cells...
November 18, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/29151692/fecal-calprotectin-measurement-is-a-marker-of-short-term-clinical-outcome-and-presence-of-mucosal-healing-in-patients-with-inflammatory-bowel-disease
#3
Athanasios Kostas, Spyros I Siakavellas, Charalambos Kosmidis, Anna Takou, Joanna Nikou, Georgios Maropoulos, John Vlachogiannakos, George V Papatheodoridis, Ioannis Papaconstantinou, Giorgos Bamias
AIM: To evaluate the utility of fecal calprotectin (FC) in predicting relapse and endoscopic activity during follow-up in an inflammatory bowel disease (IBD) cohort. METHODS: All FC measurements that were obtained during a 3-year period from patients with inflammatory bowel disease in clinical remission were identified. Data regarding the short-term (6 mo) course of the disease were extracted from the medical files. Exclusion criteria were defined as: (1) An established flare of the disease at the time of FC measurement, (2) Loss to follow up within 6 mo from baseline FC measurement, and, (3) Insufficient data on file...
November 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29127496/classification-of-eosinophilic-disorders-of-the-small-and-large-intestine
#4
Aoife J McCarthy, Kieran Sheahan
Eosinophilic gastrointestinal diseases (EGIDs), including eosinophilic gastroenteritis and eosinophilic colitis, have been increasing in prevalence in Western countries in recent years. Eosinophils are normally scanty in the gastrointestinal tract, and increased numbers of eosinophils can denote pathology. Normal values for tissue eosinophils vary widely between different segments of the colon, thus location of the biopsy is critically important for the interpretation of findings. However, no standard diagnostic criteria have been proposed for the diagnosis of eosinophilic gastroenteritis or eosinophilic colitis...
November 10, 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/29121863/multiplex-real-time-pcr-assay-for-detection-of-escherichia-coli-o157-h7-and-screening-for-non-o157-shiga-toxin-producing-e-coli
#5
Baoguang Li, Huanli Liu, Weimin Wang
BACKGROUND: Shiga toxin-producing Escherichia coli (STEC), including E. coli O157:H7, are responsible for numerous foodborne outbreaks annually worldwide. E. coli O157:H7, as well as pathogenic non-O157:H7 STECs, can cause life-threating complications, such as bloody diarrhea (hemolytic colitis) and hemolytic-uremic syndrome (HUS). Previously, we developed a real-time PCR assay to detect E. coli O157:H7 in foods by targeting a unique putative fimbriae protein Z3276. To extend the detection spectrum of the assay, we report a multiplex real-time PCR assay to specifically detect E...
November 9, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/29102418/the-utility-of-food-antigen-test-in-the-diagnosis-of-crohn-s-disease-and-remission-maintenance-after-exclusive-enteral-nutrition
#6
Gefei Wang, Jianan Ren, Guanwei Li, Qiongyuan Hu, Guosheng Gu, Huajian Ren, Zhiwu Hong, Jieshou Li
BACKGROUND: Crohn's disease (CD) involves intensive immunologic responses to food antigens. Exclusive enteral nutrition (EEN) showed efficacy in inducing disease remission. However, relapse commonly occurred when normal diet was reintroduced. We aimed to investigate the food-specific IgG antibodies of CD, and clarify the effects of exclusion diet guided by food-specific antibodies on remission maintenance after EEN. METHODS: All available data of food-specific antibodies were retrieved from the database and analyzed for the diagnostic value...
October 25, 2017: Clinics and Research in Hepatology and Gastroenterology
https://www.readbyqxmd.com/read/29036010/the-reasoning-beyond-the-potential-use-of-exclusive-enteral-nutrition-and-other-specified-diets-in-children-with-ulcerative-colitis
#7
Ron Shaoul, Stephanie Brown, Andrew S Day
The incidence of inflammatory bowel disease (IBD) is steadily on the rise in Western as well as in developing countries paralleling the increase of westernized diets, characterized by high protein and fat as well as excessive sugar intake, with less vegetables and fiber. Furthermore, nutrition is involved in several aspects of pediatric inflammatory bowel disease (IBD), ranging from disease etiology to induction and maintenance of remission of disease. Exclusive enteral nutrition (EEN) has been shown to induce remission, including in patients with isolated colonic disease, and leads to mucosal healing in Crohn disease (CD)...
October 13, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/29034459/amelioration-of-autoimmunity-with-an-inhibitor-selectively-targeting-all-active-centers-of-the-immunoproteasome
#8
Michael Basler, Elmer Maurits, Gerjan de Bruin, Julia Koerner, Herman S Overkleeft, Marcus Groettrup
BACKGROUND AND PURPOSE: MECL-1 (β2i), LMP2 (β1i), and LMP7 (β5i) are the proteolytically active subunits of the immunoproteasome, a special type of proteasome mainly expressed in hematopoietic cells. Targeting LMP7 has been shown to be therapeutically effective in pre-clinical models of autoimmune diseases. In this study, a recently described inhibitor of the immunoproteasome LU-005i was investigated with respect to selectivity and biological activity. EXPERIMENTAL APPROACH: The specificity of LU-005i and other immunoproteasome selective inhibitors was characterized using fluorogenic peptide substrates...
October 15, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28991085/crohn-s-disease-of-the-pouch-a-true-diagnosis-or-an-oversubscribed-diagnosis-of-exclusion
#9
Amy L Lightner, Joel G Fletcher, John H Pemberton, Kellie L Mathis, Laura E Raffals, Thomas Smyrk
BACKGROUND: After IPAA, 8% of patients with ulcerative colitis are later diagnosed with Crohn's disease of the pouch, associated with an increased rate of pouch failure. No study has reported on how often the clinical diagnosis is correlated with histologic findings of Crohn's disease in the excised pouch. OBJECTIVE: The purpose of this study was to determine whether the clinical diagnosis is consistent with pathologic confirmation at pouch excision. SETTINGS: The study was conducted at a tertiary IBD referral center...
November 2017: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/28977914/potential-link-between-fusobacterium-enrichment-and-dna-methylation-accumulation-in-the-inflammatory-colonic-mucosa-in-ulcerative-colitis
#10
Tomomitsu Tahara, Ichiro Hirata, Naoko Nakano, Sayumi Tahara, Noriyuki Horiguchi, Tomohiko Kawamura, Masaaki Okubo, Takamitsu Ishizuka, Hyuga Yamada, Dai Yoshida, Takafumi Ohmori, Kohei Maeda, Naruomi Komura, Hirokazu Ikuno, Yasutaka Jodai, Toshiaki Kamano, Mitsuo Nagasaka, Yoshihito Nakagawa, Tetsuya Tuskamoto, Makoto Urano, Tomoyuki Shibata, Makoto Kuroda, Naoki Ohmiya
BACKGROUND AND AIM: Fusobacterium enrichment has been associated with colorectal cancer development. Ulcerative colitis (UC) associated tumorigenesis is characterized as high degree of methylation accumulation through continuous colonic inflammation. The aim of this study was to investigate a potential link between Fusobacterium enrichment and DNA methylation accumulation in the inflammatory colonic mucosa in UC. METHODS: In the candidate analysis, inflamed colonic mucosa from 86 UC patients were characterized the methylation status of colorectal a panel of cancer related 24 genes...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28951510/increased-cholestatic-enzymes-in-two-patients-with-long-term-history-of-ulcerative-colitis-consider-primary-biliary-cholangitis-not-always-primary-sclerosing-cholangitis
#11
Erietta Polychronopoulou, Vasiliki Lygoura, Nikolaos K Gatselis, George N Dalekos
Several hepatobiliary disorders have been reported in ulcerative colitis (UC) patients with primary sclerosing cholangitis (PSC) being the most specific. Primary biliary cholangitis (PBC), previously known as primary biliary cirrhosis, rarely occurs in UC. We present two PBC cases of 67 and 71 years who suffered from long-standing UC. Both patients were asymptomatic but they had increased cholestatic enzymes and high titres of antimitochondrial antibodies (AMA)-the laboratory hallmark of PBC. After careful exclusion of other causes of cholestasis by MRI/magnetic resonance cholangiopancreatography (MRCP), virological and microbiological investigations, a diagnosis of PBC associated with UC was established...
September 25, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28766553/regulatory-t-cells-with-superior-immunosuppressive-capacity-emigrate-from-the-inflamed-colon-to-draining-lymph-nodes
#12
Y Nakanishi, R Ikebuchi, T Chtanova, Y Kusumoto, H Okuyama, T Moriya, T Honda, K Kabashima, T Watanabe, Y Sakai, M Tomura
Foxp3(+) Regulatory T cells (Tregs) play a critical role in the maintenance of colon homeostasis. Here we utilized photoconvertible KikGR mice to track immune cells from the caecum and ascending (proximal) colon in the steady state and DSS-induced colitis. We found that Tregs from the proximal colon (colonic migratory Tregs) migrated exclusively to the distal part of mesenteric lymph nodes (dMLN) in an S1PR1-dependent process. In the steady state, colonic migratory CD25(+) Tregs expressed higher levels of CD103, ICOS, LAG3 and CTLA-4 in comparison with pre-existing LN Tregs...
August 2, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28765569/locus-of-adhesion-and-autoaggregation-laa-a-pathogenicity-island-present-in-emerging-shiga-toxin-producing-escherichia-coli-strains
#13
David A Montero, Juliana Velasco, Felipe Del Canto, Jose L Puente, Nora L Padola, David A Rasko, Mauricio Farfán, Juan C Salazar, Roberto Vidal
Shiga Toxin-producing Escherichia coli (STEC) are a group of foodborne pathogens associated with diarrhea, dysentery, hemorrhagic colitis (HC) and hemolytic uremic syndrome (HUS). Shiga toxins are the major virulence factor of these pathogens, however adhesion and colonization to the human intestine is required for STEC pathogenesis. A subset of STEC strains carry the Locus of Enterocyte Effacement (LEE) pathogenicity island (PAI), which encodes genes that mediate the colonization of the human intestine. While LEE-positive STEC strains have traditionally been associated with human disease, the burden of disease caused by STEC strains that lacks LEE (LEE-negative) has increased recently in several countries; however, in the absence of LEE, the molecular pathogenic mechanisms by STEC strains are unknown...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28723632/potential-link-between-fusobacterium-enrichment-and-dna-methylation-accumulation-in-the-inflammatory-colonic-mucosa-in-ulcerative-colitis
#14
Tomomitsu Tahara, Ichiro Hirata, Naoko Nakano, Sayumi Tahara, Noriyuki Horiguchi, Tomohiko Kawamura, Masaaki Okubo, Takamitsu Ishizuka, Hyuga Yamada, Dai Yoshida, Takafumi Ohmori, Kohei Maeda, Naruomi Komura, Hirokazu Ikuno, Yasutaka Jodai, Toshiaki Kamano, Mitsuo Nagasaka, Yoshihito Nakagawa, Tetsuya Tuskamoto, Makoto Urano, Tomoyuki Shibata, Makoto Kuroda, Naoki Ohmiya
BACKGROUND AND AIM: Fusobacterium enrichment has been associated with colorectal cancer development. Ulcerative colitis (UC) associated tumorigenesis is characterized as high degree of methylation accumulation through continuous colonic inflammation. The aim of this study was to investigate a potential link between Fusobacterium enrichment and DNA methylation accumulation in the inflammatory colonic mucosa in UC. METHODS: In the candidate analysis, inflamed colonic mucosa from 86 UC patients were characterized the methylation status of colorectal a panel of cancer related 24 genes...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28691939/autoantibodies-against-glycoprotein-2-isoforms-in-pediatric-patients-with-inflammatory-bowel-disease
#15
Nadja Röber, Lydia Noß, Alexander Goihl, Dirk Reinhold, Josefine Jahn, Jan de Laffolie, Wolf Johannes, Gunter M Flemming, Dirk Roggenbuck, Karsten Conrad, Martin W Laass
BACKGROUND: Anti-Glycoprotein 2 (GP2) antibodies are associated with a more complicated course of Crohn's disease (CD) in adults. Four different GP2 isoforms with different length and antibody-binding sites have been identified so far but not been explored in serological studies. We aimed to investigate the diagnostic utility of autoantibodies against all 4 isoforms of GP2 in an exclusively pediatric population for the first time. METHODS: We included 278 children and adolescents with inflammatory bowel disease: 164 with CD, 114 with ulcerative colitis, 83 disease controls (acute gastrointestinal infection, nonspecific gastrointestinal functional disorders), and 219 healthy controls...
July 6, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28674245/a-c8-modified-graphene-msio2-composites-based-method-for-quantification-of-gallic-acid-in-rat-plasma-after-oral-administration-of-changtai-granule-and-its-application-to-pharmacokinetics
#16
Chen Xu, Yingjia Yu, Li Ling, Yang Wang, Jundong Zhang, Yan Li, Gengli Duan
A rapid, effective extraction technique has been established for measuring the gallic acid in rat plasma by using sandwich-structured graphene/mesoporous silica composites with C8-modified interior pore-walls as adsorbent. The unique characteristics of the graphene-silica composites excluded large molecules, like proteins, from the mesopore channels as a result of size exclusion effect, leading to a direct extraction of drug molecules from protein-rich biological samples such as plasma without any other pretreatment procedure...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28670225/management-of-ulcerative-colitis-in-taiwan-consensus-guideline-of-the-taiwan-society-of-inflammatory-bowel-disease
#17
REVIEW
Shu-Chen Wei, Ting-An Chang, Te-Hsin Chao, Jinn-Shiun Chen, Jen-Wei Chou, Yenn-Hwei Chou, Chiao-Hsiung Chuang, Wen-Hung Hsu, Tien-Yu Huang, Tzu-Chi Hsu, Chun-Chi Lin, Hung-Hsin Lin, Jen-Kou Lin, Wei-Chen Lin, Yen-Hsuan Ni, Ming-Jium Shieh, I-Lun Shih, Chia-Tung Shun, Yuk-Ming Tsang, Cheng-Yi Wang, Horng-Yuan Wang, Meng-Tzu Weng, Deng-Chyang Wu, Wen-Chieh Wu, Hsu-Heng Yen, Jau-Min Wong
Ulcerative colitis (UC) is an inflammatory bowel disease characterized by chronic mucosal inflammation of the colon, and the prevalence and incidence of UC have been steadily increasing in Taiwan. A steering committee was established by the Taiwan Society of Inflammatory Bowel Disease to formulate statements on the diagnosis and management of UC taking into account currently available evidence and the expert opinion of the committee. Accurate diagnosis of UC requires thorough clinical, endoscopic, and histological assessment and careful exclusion of differential diagnoses, particularly infectious colitis...
July 2017: Intestinal Research
https://www.readbyqxmd.com/read/28663163/validation-of-an-improved-computer-assisted-technique-for-mining-free-text-electronic-medical-records
#18
Marco Duz, John F Marshall, Tim Parkin
BACKGROUND: The use of electronic medical records (EMRs) offers opportunity for clinical epidemiological research. With large EMR databases, automated analysis processes are necessary but require thorough validation before they can be routinely used. OBJECTIVE: The aim of this study was to validate a computer-assisted technique using commercially available content analysis software (SimStat-WordStat v.6 (SS/WS), Provalis Research) for mining free-text EMRs. METHODS: The dataset used for the validation process included life-long EMRs from 335 patients (17,563 rows of data), selected at random from a larger dataset (141,543 patients, ~2...
June 29, 2017: JMIR Medical Informatics
https://www.readbyqxmd.com/read/28638582/an-overview-of-inflammatory-bowel-disease-general-consideration-and-genetic-screening-approach-in-diagnosis-of-early-onset-subsets
#19
REVIEW
Shahram Nemati, Shahram Teimourian
Inflammatory bowel disease (IBD) is the consequence of an aberrant hemostasis of the immune cells at the gut mucosal border. Based on clinical manifestation, laboratory tests, radiological studies, endoscopic and histological features, this disease is divided into three main types including Crohn's disease (CD), Ulcerative colitis (UC), and IBDunclassified (IBD-U). IBD is frequently presented in adults, but about 20% of IBD cases are diagnosed during childhood called pediatric IBD (PIBD). Some patients in the latter group emerge the first symptoms during infancy or under 5 years of age named infantile and very early onset IBD (VEO-IBD), respectively...
April 2017: Middle East Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28614561/association-of-preoperative-anti-tumor-necrosis-factor-therapy-with-adverse-postoperative-outcomes-in-patients-undergoing-abdominal-surgery-for-ulcerative-colitis
#20
Audrey S Kulaylat, Afif N Kulaylat, Eric W Schaefer, Andrew Tinsley, Emmanuelle Williams, Walter Koltun, Christopher S Hollenbeak, Evangelos Messaris
Importance: Despite the increasing use of anti-tumor necrosis factor (TNF) therapy in ulcerative colitis, its effects on postoperative outcomes remain unclear, with many patients requiring surgical intervention despite optimal medical management. Objective: To assess the association of preoperative use of anti-TNF agents with adverse postoperative outcomes. Design, Setting, and Participants: This analysis used insurance claims data from a large national database to identify patients 18 years or older with ulcerative colitis...
August 16, 2017: JAMA Surgery
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