Abstract:
BACKGROUND:P-glycoprotein (P-gp), the product of the multidrug resistance gene (MDR), is an ATP-dependent transmembrane pump, which is expressed in multiple cell lineages including epithelial and hematopoetic cells. The human MDR gene is located on chromosome 7 (7q21.1), a susceptibility loci for inflammatory bowel disease (IBD). A significant number of IBD patients carry mutations in this gene and P-gp-deficient FVB/N mice develop a severe spontaneous colitis, characterized by impaired intestinal barrier function and immune reactivity to intestinal bacterial antigens. METHODS:In this work we explored the role of mouse strain, as well as environmental insults, on the development of colonic inflammation in the absence of P-gp. Among the induction methods utilized, dextran sodium sulfate (DSS) disrupts the intestinal epithelium, while piroxicam is a nonsteroidal antiinflammatory (NSAID) drug that inhibits prostaglandin production and initiates colitis in IL10-deficient animals. Helicobacter bilis is a known mediator of bacterial-induced colitis. RESULTS:We demonstrate that crossing this mutation onto the C57BL/6 strain confers protection from spontaneous colitis. C57BL/6.mdr1a-deficient animals demonstrated increased histological inflammation, colonic shortening, fecal blood, and reduced body weight after 7 days of treatment with 2.25% DSS. C57BL/6.mdr1a-deficient mice treated with piroxicam or infected with H. bilis showed no weight loss, or alterations in colonic histology. CONCLUSIONS:These data indicate that the effects of P-gp deficiency are significantly modulated by background strain influences, but that the epithelium continues to have increased susceptibility to chemical injury in the C57BL/6 model.
journal_name
Inflamm Bowel Disjournal_title
Inflammatory bowel diseasesauthors
Staley EM,Schoeb TR,Lorenz RGdoi
10.1002/ibd.20824subject
Has Abstractpub_date
2009-05-01 00:00:00pages
684-96issue
5eissn
1078-0998issn
1536-4844journal_volume
15pub_type
杂志文章abstract::Ulcerative colitis (UC) and Crohn's disease (CD) may directly result in morbidity and rarely mortality from complications such as colorectal cancer or sepsis. Mortality rates compared with the matched general population, measured by standardized mortality ratio, may therefore be increased. This review examines the evi...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,评审
doi:10.1002/ibd.22871
更新日期:2012-08-01 00:00:00
abstract:BACKGROUND:Infliximab is efficacious in the management of moderate to severe Crohn's disease (CD). There are limited data regarding performance of infliximab in patients who require reinitiation of maintenance dosing following previous irregular exposure. METHODS:This was a retrospective, observational study of CD pat...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1002/ibd.21164
更新日期:2010-07-01 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::Inflammatory bowel disease is associated with industrialization, and its incidence has increased markedly over time. The prospect of reversing these trends motivates the search for the agent(s) involved. Modernity entails several physical and behavioral modifications that compromise both the photosynthesis of cholecal...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,评审
doi:10.1097/MIB.0b013e31828a3b6f
更新日期:2013-09-01 00:00:00
abstract:BACKGROUND:Faecalibacterium prausnitzii comprises 2 phylogroups, whose abundance in healthy and diseased gut and in conjunction with Escherichia coli has not yet been studied. This work aims to determine the contribution of F. prausnitzii phylogroups I and II in intestinal disease and to assess their potential diagnost...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/MIB.0000000000000590
更新日期:2016-01-01 00:00:00
abstract::This review examines preclinical and clinical studies relevant to our understanding of how the bidirectional gut-brain axis influences the natural history of inflammatory bowel disease. Preclinical studies provide proof of concept that preexisting behavioral illness, such as depression, results in increased susceptibi...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1093/ibd/izaa004
更新日期:2020-03-04 00:00:00
abstract:Background:We quantified loss of response (LOR) to vedolizumab (VDZ) in clinical practice and assessed the effectiveness of VDZ dose intensification for managing LOR. Methods:Retrospective review (May 2014-December 2016) of a prospectively maintained inflammatory bowel disease (IBD) registry. Kaplan-Meier estimates we...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1093/ibd/izy171
更新日期:2018-10-12 00:00:00
abstract:INTRODUCTION:No study to date has evaluated perinuclear antineutrophil cytoplasmic antibody (pANCA) and anti-Saccharomyces cerevisiae antibody (ASCA) in pediatric inflammatory bowel disease-unclassified (IBDU) as compared with Crohn's colitis (CC) and ulcerative colitis (UC), which represent the diagnostic challenge. W...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,多中心研究
doi:10.1097/MIB.0000000000000784
更新日期:2016-08-01 00:00:00
abstract:BACKGROUND:The aim of this study was to assess the clinical benefit and tolerability of adalimumab, a fully human monoclonal antibody to tumor necrosis factor (TNF), in patients with ulcerative colitis (UC). METHODS:Patients with active UC, including those who had lost response or developed intolerance to the chimeric...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1002/ibd.20924
更新日期:2009-09-01 00:00:00
abstract:BACKGROUND:The pathophysiological basis for corticosteroid (CS) failure in ulcerative colitis (UC) is unknown. A transactivation glucocorticoid bioassay (GBA) was developed to measure the biological activity of CS by quantifying glucocorticoid response elements. This approach eliminates differences in bioavailability, ...
journal_title:Inflammatory bowel diseases
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1002/ibd.21070
更新日期:2010-03-01 00:00:00
abstract:BACKGROUND:FTY720 is a novel reagent that possesses potent immunosuppressive activity. The immunosuppression induced by FTY720 is mediated by completely different mechanisms from those of conventional immunosuppressants, that is, by altering the tissue distribution of lymphocytes rather than inhibiting activation. In t...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/00054725-200405000-00002
更新日期:2004-05-01 00:00:00
abstract:BACKGROUND:Osteoporosis is a well-known complication of Crohn's disease (CD). Osteoprotegerin (OPG) concentration is elevated in patients with CD compared to healthy controls. Long-term infliximab (IFX) maintenance therapy improves the patients' bone mineral density. The effect of IFX on bone metabolism has not yet bee...
journal_title:Inflammatory bowel diseases
pub_type: 临床试验,杂志文章
doi:10.1002/ibd.20234
更新日期:2007-11-01 00:00:00
abstract:BACKGROUND:High levels of patient activation (having the knowledge, skills, and confidence to effectively manage one's care), have been associated with improved outcomes in many chronic conditions. There have been few studies of the effects of activation in patients with inflammatory bowel disease (IBD). We performed a...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1093/ibd/izy378
更新日期:2019-06-18 00:00:00
abstract::A prospective study was conducted to determine the implications of acute pouchitis on the long-term functional results of restorative proctocolectomy with J-pouch ileoanal anastomosis (IPAA). Between July 1988 and June 1996, 137 consecutive patients underwent IPAA for treatment of ulcerative colitis. 127 patients (93%...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1002/ibd.3780040405
更新日期:1998-11-01 00:00:00
abstract::The peak incidence of the inflammatory bowel diseases (IBDs) is between the second and fourth decades of life, which coincides with prime reproductive years. Unplanned or mistimed pregnancies may account for nearly half of all pregnancies and are associated with adverse consequences such as a higher risk of delayed pr...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1093/ibd/izz025
更新日期:2019-09-18 00:00:00
abstract:BACKGROUND:Inflammatory bowel disease (IBD) is characterized by a chronic inflammation of the gut, partly driven by defects in the expression and function of pattern recognition receptors, including the IFI16 protein. Because this protein is a target for autoantibodies and its aberrant expression was reported in coloni...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/MIB.0000000000000926
更新日期:2016-12-01 00:00:00
abstract:BACKGROUND:Data from CHARM, a 56-week, randomized controlled trial of adalimumab for patients with moderately to severely active Crohn's disease (CD), were used to evaluate outcomes of adalimumab dosage adjustment. METHODS:Patients randomized to blinded adalimumab 40 mg every other week (EOW) in CHARM were the focus o...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,随机对照试验
doi:10.1002/ibd.21328
更新日期:2011-01-01 00:00:00
abstract:BACKGROUND:We assessed whether selective granulocyte and monocyte/macrophage adsorption apheresis maintained clinical remission in asymptomatic inflammatory bowel disease (IBD) patients at significant risk of clinical relapse. METHODS:Sixty asymptomatic patients (age 18-70 years) with IBD (in clinical remission) with ...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,随机对照试验
doi:10.1002/ibd.20505
更新日期:2008-10-01 00:00:00
abstract:BACKGROUND:Vitamin D insufficiency has been suggested to be associated with high risk of Crohn's disease (CD). In France, where food fortification is limited, the major source of vitamin D is through sun exposure. The aim of this work was to analyze the relationship between residential sun exposure and the risk of inci...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/01.MIB.0000436275.12131.4f
更新日期:2014-01-01 00:00:00
abstract:BACKGROUND:We have previously demonstrated that inhibition of dipeptidyl peptidase (DP) activity partially attenuates dextran sulfate sodium (DSS) colitis in mice. The aim of this study was to further investigate the mechanisms of this protection. MATERIALS AND METHODS:Wildtype (WT) and DPIV(-/-) mice consumed 2% DSS ...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1002/ibd.21241
更新日期:2010-08-01 00:00:00
abstract:OBJECTIVE:Our goal in this multicentric prospective study was 2-fold: first, to test the diagnostic accuracy of ultrasound, color Doppler imaging (CDI), and contrast-enhanced ultrasound (CEUS) in identifying disease activity in patients with Crohn's disease (CD) compared with endoscopy as the reference standard; and, s...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1093/ibd/izaa134
更新日期:2021-01-01 00:00:00
abstract:BACKGROUND:The incidence of pediatric inflammatory bowel disease (IBD) around the world is increasing. However, there is a scarcity of data on the epidemiology of pediatric IBD in the Southern Hemisphere. This study aimed to document the point prevalence of pediatric IBD in New Zealand on June 30, 2015. METHODS:All pa...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/MIB.0000000000001138
更新日期:2017-08-01 00:00:00
abstract:BACKGROUND:Little knowledge exists about the association between anti-tumor necrosis factor-alpha (anti-TNF-α) therapy for inflammatory bowel disease during late pregnancy and adverse birth outcomes. We aimed to examine whether treatment with anti-TNF-α during the third trimester affected preterm birth and low birth we...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1097/MIB.0000000000001234
更新日期:2017-11-01 00:00:00
abstract:BACKGROUND:Fatigue is highly prevalent among patients with inflammatory bowel disease (IBD) and may have an unfavorable impact on quality of life (QoL). The IBD-Fatigue scale (with components SCORE1 and SCORE2) is a recently developed disease-specific questionnaire. We sought to validate a Greek version of IBD-F and us...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1093/ibd/izaa201
更新日期:2020-08-07 00:00:00
abstract:BACKGROUND:Inflammatory bowel disease (IBD) is proposed to result from a dysregulated mucosal immune response to the colonic flora in genetically susceptible individuals. Enterotoxigenic Bacteroides fragilis (ETBF), a molecular subclass of the common human commensal, B. fragilis, has been associated with IBD. This stud...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1002/ibd.20265
更新日期:2007-12-01 00:00:00
abstract:BACKGROUND:Toll-like receptor 5 (TLR5) is implicated in the innate and adaptive immune responses that are associated with inflammatory bowel disease (IBD). In humans TLR5 is expressed on CD4(+) T cells and costimulation with flagellin potentiates effector and regulatory T cell responses. The aim of this study was to de...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1002/ibd.21738
更新日期:2012-01-01 00:00:00
abstract:BACKGROUND:The objectives of this study were to determine the prevalence and incidence of inflammatory bowel disease (IBD) in a representative Lebanese cohort and to describe practice prevalence trends, disease characteristics, and impact on quality of life (QoL) of IBD patients in Lebanon. METHODS:All of a university...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1002/ibd.20022
更新日期:2007-04-01 00:00:00
abstract::Inflammatory bowel disease (IBD) has classically been associated with malnutrition and weight loss, although this has become less common with advances in treatment and greater proportions of patients attaining clinical remission. However, micronutrient deficiencies are still relatively common, particularly in CD patie...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章,评审
doi:10.1002/ibd.22906
更新日期:2012-10-01 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:Background:Endoscopic monitoring is fundamental for evaluating the therapeutic response in IBD, but a validated endomicroscopic mucosal healing (MH) score is not available to date. However, confocal laser endomicroscopy (CLE) might define MH more precisely than conventional endoscopy. The major aim was to establish and...
journal_title:Inflammatory bowel diseases
pub_type: 杂志文章
doi:10.1093/ibd/izx012
更新日期:2017-12-19 00:00:00