Abstract:
BACKGROUND:L-arginine (L-Arg) is the substrate for both inducible nitric oxide (NO) synthase (NOS2) and arginase (ARG) enzymes. L-Arg is actively transported into cells by means of cationic amino acid transporter (SLC7) proteins. We have linked L-Arg and arginase 1 activity to epithelial restitution. Our aim was to determine if L-Arg, related amino acids, and metabolic enzymes are altered in ulcerative colitis (UC). METHODS:Serum and colonic tissues were prospectively collected from 38 control subjects and 137 UC patients. Dietary intake, histologic injury, and clinical disease activity were assessed. Amino acid levels were measured by high-performance liquid chromatography. Messenger RNA (mRNA) levels were measured by real-time PCR. Colon tissue samples from 12 Crohn's disease patients were obtained for comparison. RESULTS:Dietary intake of arginine and serum L-Arg levels were not different in UC patients versus control subjects. In active UC, tissue L-Arg was decreased, whereas L-citrulline (L-Cit) and the L-Cit/L-Arg ratio were increased. This pattern was also seen when paired involved (left) versus uninvolved (right) colon tissues in UC were assessed. In active UC, SLC7A2 and ARG1 mRNA levels were decreased, whereas ARG2 and NOS2 were increased. Similar alterations in mRNA expression occurred in tissues from Crohn's disease patients. In involved UC, SLC7A2 and ARG1 mRNA levels were decreased, and NOS2 and ARG2 increased, when compared with uninvolved tissues. CONCLUSIONS:Patients with UC exhibit diminished tissue L-Arg, likely attributable to decreased cellular uptake and increased consumption by NOS2. These findings combined with decreased ARG1 expression indicate a pattern of dysregulated L-Arg availability and metabolism in UC.
journal_name
Inflamm Bowel Disjournal_title
Inflammatory bowel diseasesauthors
Coburn LA,Horst SN,Allaman MM,Brown CT,Williams CS,Hodges ME,Druce JP,Beaulieu DB,Schwartz DA,Wilson KTdoi
10.1097/MIB.0000000000000790subject
Has Abstractpub_date
2016-08-01 00:00:00pages
1847-58issue
8eissn
1078-0998issn
1536-4844journal_volume
22pub_type
杂志文章abstract:Background:Both muscle-related complaints and elevated serum creatine kinase (CK) levels have been reported in patients with inflammatory bowel disease (IBD) treated with infliximab (IFX), mainly as case reports. The aim of this study was to investigate the effect of IFX therapy on serum CK levels in a cohort of Greek ...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1093/ibd/izy088
更新日期:2018-05-18 00:00:00
abstract:BACKGROUND:Childhood-onset Crohn's disease (CD) might reflect a more severe form of disease. To test this hypothesis we analyzed the long-term natural history of CD in an adult cohort of patients with childhood-onset compared to adult-onset CD. METHODS:We selected 206 childhood-onset CD patients among 2992 adult patie...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1002/ibd.21152
更新日期:2010-06-01 00:00:00
abstract::Restorative proctocolectomy with ileal-pouch anal anastomosis (RPC) is the operation of choice for ulcerative colitis (UC) patients requiring surgery. It is also used for patients with familial adenomatous polyposis (FAP). Pouchitis accounts for 10% of pouch failures. It is an idiopathic inflammatory condition that ma...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,评审
doi:10.1002/ibd.21911
更新日期:2012-06-01 00:00:00
abstract:BACKGROUND:Mucosal healing (MH) as a treatment target for ulcerative colitis is of growing interest because it is associated with improved clinical outcomes. However, the feasibility and probability of reaching MH in clinical practice is unknown. We therefore evaluated the feasibility of "treating to target" according ...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/01.MIB.0000437985.00190.aa
更新日期:2014-02-01 00:00:00
abstract::This review covers the use of steroids in the treatment of both ulcerative colitis and Crohn's disease. It looks at controlled trials and uncontrolled trials as to the benefits of this agent in both inducing and maintaining remission. The review also stresses the high incidence of toxicity with prolonged use of steroi...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,评审
doi:10.1097/00054725-200002000-00009
更新日期:2000-02-01 00:00:00
abstract:BACKGROUND:The unavailability of standardized parameters in bowel ultrasonography (US) commonly used in Crohn's disease (CD) and the shortage of skilled ultrasonographers are 2 limiting factors in the use of this imaging modality around the world. The aim of this study is to evaluate interobserver agreement among exper...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,多中心研究
doi:10.1093/ibd/izy091
更新日期:2018-08-16 00:00:00
abstract::We report genome-wide linkage results using model-free linkage analysis (Allegro) of 358 autosomal microsatellites in 260 new inflammatory bowel disease-affected relative pairs from 139 Caucasian families, including 108 Crohn's disease-affected relative pairs and 72 ulcerative colitis-affected relative pairs. Our resu...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/00054725-200409000-00004
更新日期:2004-09-01 00:00:00
abstract:INTRODUCTION:Concurrent cytomegalovirus (CMV) in inflammatory bowel disease-related colitis is an important yet complex clinical scenario associated with high rates of colectomy and other morbidity. This review aimed to examine the literature to produce a comprehensive diagnostic and treatment algorithm for the managem...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,评审
doi:10.1097/MIB.0000000000000958
更新日期:2016-12-01 00:00:00
abstract:BACKGROUND:Crohn's disease is a heterogeneous disease, and several classification systems have been developed to classify the patients in more homogeneous groups. Our aim was to assess the intra- and interobserver variation when classifying patients according to the widely used Vifenna classification. METHODS:Ten rand...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/01.mib.0000165115.18310.e7
更新日期:2005-07-01 00:00:00
abstract:Introduction:A new clinician-administered inflammatory bowel disease (IBD) Disability Index (IBDDI) was recently developed and validated among a population in France. We aimed to validate the IBDDI in a North American setting and adapt for use as a self-report tool. Methods:Persons 18-65 years old from the population-...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1093/ibd/izx063
更新日期:2018-03-19 00:00:00
abstract:BACKGROUND:Nonadherence to medications may affect disease outcomes. The aim of this article was to review methods of assessment, prevalence, and predictors of nonadherence to anti-tumor necrosis factor therapy in inflammatory bowel diseases (IBD). METHODS:Studies were identified through the electronic database of MEDL...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,评审
doi:10.1097/MIB.0b013e31828132cb
更新日期:2013-06-01 00:00:00
abstract::Crohn's disease is associated with an excessive T helper (TH) type 1 inflammatory immune response. Reducing the influx of disease-associated CD4+ TH1 cells into the inflamed intestine is likely to be beneficial in preventing a disease flare-up and even possibly in reducing the effect of acute disease. Thiazolidenedion...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/01.mib.0000160770.94199.9b
更新日期:2005-03-01 00:00:00
abstract:BACKGROUND:Mesenchymal stem cells (MSCs) have demonstrated significant potentials for the treatment of inflammatory bowel disease. Clinical feasible methods to individually document the MSC recruitment to intestinal mucosa is lacking. Here, we proposed that endomicroscopy could noninvasively track MSCs in vivo at cellu...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/MIB.0000000000000458
更新日期:2015-09-01 00:00:00
abstract:BACKGROUND AND AIMS:Ulcerative colitis (UC) is a form of inflammatory bowel disease, and antibodies against tumor necrosis factor (anti-TNF) are used for treatment. Many patients are refractory or lose response to anti-TNF, and predicting response would be an extremely valuable clinical tool. Unlike most biomarkers, cy...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1093/ibd/izy358
更新日期:2019-02-21 00:00:00
abstract:BACKGROUND:Ulcerative colitis is associated with increased colon permeability resulting in bacterial translocation into the lamina propria. We investigate the importance of the Toll-like receptor (TLR) regulating protein IL-1 receptor-associated kinase M (IRAK-M) using the erosive dextran sulfate sodium (DSS)-induced m...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1002/ibd.21287
更新日期:2010-10-01 00:00:00
abstract:BACKGROUND:This study aimed to evaluate the feasibility, acceptability, and effectiveness of a mindfulness-based intervention for patients with inflammatory bowel disease (MI-IBD). DESIGN:Treatment-as-usual control versus mindfulness-based stress reduction intervention. METHODS:Sixty patients participated in either t...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/MIB.0000000000000629
更新日期:2016-03-01 00:00:00
abstract:BACKGROUND:Vedolizumab is a gut-selective biologic that has shown efficacy in ulcerative colitis (UC) and Crohn's disease (CD). We studied the pharmacokinetics, pharmacodynamics, safety, tolerability, and efficacy of a new formulation of vedolizumab produced by an improved manufacturing process. METHODS:UC patients we...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,随机对照试验
doi:10.1002/ibd.21896
更新日期:2012-08-01 00:00:00
abstract:BACKGROUND:MicroRNAs (miRNAs) are dysregulated in the inflammatory bowel diseases, Crohn's disease (CD) and ulcerative colitis (UC), which arise due to dysfunctional host-microbe interactions and impairment of the barrier function of the intestine. Here, we sought to determine whether circulating miRNAs are biomarkers ...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/MIB.0000000000000285
更新日期:2015-03-01 00:00:00
abstract:BACKGROUND:Immunomodulator (IM) treatments in ulcerative colitis (UC) are not curative and carry increased risk of complications, sometimes leading to therapy changes, reduced treatment benefits, and eventual relapse. We assessed patterns of IM utilization and therapy changes, complications, and disease relapse in a re...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/MIB.0000000000000089
更新日期:2014-08-01 00:00:00
abstract:BACKGROUND:Consensus on what constitutes a quality colonoscopy report for patients with inflammatory bowel disease (IBD) is lacking. We developed a template for quality colonoscopy reporting that can be used broadly by endoscopists. METHODS:After a literature review of topics relevant to colonoscopy reporting, members...
journal_title:Inflammatory bowel diseases
pub_type: 共识发展会议,杂志文章
doi:10.1097/MIB.0000000000000764
更新日期:2016-06-01 00:00:00
abstract:BACKGROUND:Chronic granulomatous disease (CGD) is a rare inherited immunodeficiency disorder characterized by inability of phagocytes to kill certain bacteria and fungi. Histology from colon biopsies of CGD patients have shown the presence of inflammation and granulomas, almost indistinguishable from the findings seen ...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1002/ibd.20890
更新日期:2009-08-01 00:00:00
abstract:BACKGROUND AND AIMS:Crohn's disease (CD) is a chronic and invalidating inflammatory bowel disease of unknown etiology. The coordinated action of the cytochrome metabolizing subfamily CYP3A and the transport protein P-glycoprotein (P-gp) in the enterocyte results in a reduced bioavailability of drugs administered orally...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/00054725-200608000-00011
更新日期:2006-08-01 00:00:00
abstract:BACKGROUND:Anti-tumor necrosis factor-α (anti-TNF-α) treatments are increasingly used to treat pediatric Crohn's disease, even without a prior trial of immunomodulators, but the cost-effectiveness of such treatment algorithms has not been formally examined. Drug plan decision-makers require evidence of cost-effectivene...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1093/ibd/izz267
更新日期:2020-07-17 00:00:00
abstract:BACKGROUND:Patients with Crohn's disease (CD) with small bowel strictures are at risk of surgery. Double-balloon enteroscopy (DBE) can evaluate the status of the small intestine, and retrograde contrast through the scope enables the surgeon to obtain information beyond the reach of the scope. This study aimed to examin...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/MIB.0000000000001175
更新日期:2017-12-01 00:00:00
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journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1093/ibd/izaa343
更新日期:2021-01-13 00:00:00
abstract::An interleukin (IL)-10 family cytokine, IL-22 is characterized by several unique biological properties, including 1) the target restricted to innate cells; 2) the distinct expression pattern between large and small intestines; 3) alteration of the cellular source depending on several factors; 4) the dual abilities to ...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,评审
doi:10.1002/ibd.22929
更新日期:2012-09-01 00:00:00
abstract:BACKGROUND:Clinical observations or animal studies implicate enteric glial cells in motility disorders, irritable bowel syndrome, inflammatory bowel disease, gastrointestinal (GI) infections, postoperative ileus, and slow transit constipation. Mechanisms underlying glial responses to inflammation in human GI tract are ...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/MIB.0000000000000854
更新日期:2016-08-01 00:00:00
abstract::Ulcerative colitis and Crohn's disease both confer an increased risk of developing colorectal cancer. The use of 5-aminosalicylate as a remission-inducing agent has been long accepted. Its use as a potential chemoprophylactic agent has been proposed and is used by some practitioners. This review examines the most rece...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,评审
doi:10.1002/ibd.20186
更新日期:2007-10-01 00:00:00
abstract::The traditional goals of Crohn's disease therapy, to induce and maintain clinical remission, have not clearly changed its natural history. In contrast, emerging evidence suggests that achieving and maintaining mucosal healing may alter the natural history of Crohn's disease, as it has been associated with more sustain...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,评审
doi:10.1002/ibd.22977
更新日期:2013-02-01 00:00:00
abstract::Crohn's disease (CD) leads to the development of complications through progressive uncontrolled inflammation and the transmural involvement of the bowel wall. Most of the available literature on penetrating CD focuses on the perianal phenotype. The management of nonperianal penetrating complications poses its own set ...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,评审
doi:10.1093/ibd/izx108
更新日期:2018-03-19 00:00:00