Abstract:
OBJECTIVE:P-glycoprotein (P-gp), the functional product of the multidrug resistance gene (MDR), is a transmembrane protein that extrudes substrates from the intracellular environment. P-gp is expressed on the apical surface of epithelial cells and on cells from the hematopoietic lineage. Human MDR polymorphisms have been associated with the increased risk of inflammatory bowel disease, and FVB/N animals deficient in mdr1a expression develop spontaneous colitis. Previous studies using adult bone marrow chimeras indicated that colitis development in this animal model was contingent on P-gp deficiency in radiation-resistant epithelial cells; however, the use of adult animals may mask the role of hematopoietic immune cells in colitis initiation, due to preexisting epithelial abnormalities. SUBJECTS AND METHODS:To assess the importance of P-gp expression in intestinal epithelial and hematopoietic-derived cells on colitis induction in FVB.mdr1a(-/-) animals, we developed a neonatal model of bone marrow reconstitution. FVB/N and FVB.mdr1a(-/-) adult and neonatal animals were lethally irradiated and reconstituted with bone marrow from FVB/N or FVB.mdr1a(-/-) donors. Animals were observed for 20 weeks. RESULTS:Adult FVB/N animals deficient in P-gp expression in hematopoietically derived immune cells developed colitis similar to adult animals deficient in P-gp expression in radiation-resistant epithelial/stromal cells. Neonatal animals deficient in P-gp expression in hematopoietically derived immune cells developed a more histologically significant colitis than those deficient in P-gp expression in epithelial tissue. CONCLUSIONS:The use of a neonatal model of bone marrow reconstitution has revealed a critical role for P-gp expression in hematopoietically derived immune cells in colitis development in the FVB.mdr1a(-/-) model.
journal_name
J Pediatr Gastroenterol Nutrjournal_title
Journal of pediatric gastroenterology and nutritionauthors
Staley EM,Dimmitt RA,Schoeb TR,Tanner SM,Lorenz RGdoi
10.1097/MPG.0b013e31822860f1subject
Has Abstractpub_date
2011-12-01 00:00:00pages
666-73issue
6eissn
0277-2116issn
1536-4801journal_volume
53pub_type
杂志文章abstract::The clinical course of a child who developed an adenocarcinoma of the stomach at 11 years of age is described. At 6 years of age, the child was evaluated for abdominal pain, weight loss, and vomiting. She was found to have hemorrhagic, atrophic gastritis, achlorhydria, and panhypogammaglobulinemia. The gastritis impro...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/00005176-198805000-00025
更新日期:1988-05-01 00:00:00
abstract:BACKGROUND:In contrast to human milk, current infant formulas in the United States do not contain omega3 and omega6 long-chain polyunsaturated fatty acids. This may lead to suboptimal blood lipid fatty acid profiles and to a measurable diminution of visual function in developing term infants. The need for docosahexaeno...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00005176-200011000-00016
更新日期:2000-11-01 00:00:00
abstract::Polymorphonuclear leukocytes (PMN) from human colostrum were compared with blood and oral exudate PMN from the same donors for their locomotive, respiratory burst, phagocytic, and shape change (polarization) capabilities. Blood PMN were functionally superior to PMN from other sites. Colostrum PMN were similar to oral ...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/00005176-199311000-00016
更新日期:1993-11-01 00:00:00
abstract:BACKGROUND:Although perianal complications of Crohn disease (CD) are commonly encountered in clinical practice, the epidemiology of perianal CD among populations of children is poorly understood. We sought to characterize the prevalence of perianal disease in a large and diverse population of pediatric patients with CD...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章,多中心研究
doi:10.1097/MPG.0000000000001447
更新日期:2017-05-01 00:00:00
abstract::In a double-blind, placebo-controlled, randomized study we measured the effect of 1 mg/kg intravenous metoclopramide on the gastric emptying of a 15 ml/kg 5% glucose meal, using a phenol red dye dilution technique. In a group of nine infants referred for multiple daily episodes of regurgitation, metoclopramide doubled...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1988-03-01 00:00:00
abstract:OBJECTIVES:The aim of this systematic review and meta-analysis was to assess immune response to vaccination in children and young people with inflammatory bowel disease (IBD). In patients with IBDs, both the disease itself and its treatment can affect the vaccine response. METHODS:Medical databases were searched for r...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/MPG.0000000000002810
更新日期:2020-10-01 00:00:00
abstract:BACKGROUND AND AIM:Pediatric gastroenterology is the only pediatric subspecialty with nutrition as part of its official curriculum and objective; however, pediatric gastroenterology fellows believe that their baseline knowledge in nutrition is suboptimal. The purpose of the present study was to assess the perceived eff...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/MPG.0b013e3182638ce8
更新日期:2013-02-01 00:00:00
abstract:OBJECTIVE:Oral insulin (INS) has been shown to protect intestinal epithelial cells from injury caused by ischemia-reperfusion and endotoxemia. In the present study, we tested whether oral insulin can protect gut epithelial cells from methotrexate (MTX)-induced intestinal damage. MATERIALS AND METHODS:Adult male Spragu...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/MPG.0b013e31806008f1
更新日期:2008-08-01 00:00:00
abstract::Ingestion of hyperosmolal formula (HOF) by neonatal piglets has been shown to cause significant time-dependent reduction in phase 3 myoelectric activity, which persists in the terminal ileum. To determine whether a single hyperosmolal meal leads to elevated concentrations of gastrointestinal (GI) hormones that inhibit...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:
更新日期:1990-07-01 00:00:00
abstract:OBJECTIVES:We evaluated the response to infliximab in pediatric patients with ulcerative colitis (UC) and their long-term follow-up. We expanded our previous study of 14 patients and furthermore evaluated the success of weaning patients from infliximab. PATIENTS AND METHODS:We reviewed the charts of 27 pediatric patie...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/MPG.0b013e31802e98d4
更新日期:2007-03-01 00:00:00
abstract::The general goals of treatment of cyclic vomiting syndrome (CVS) are: interruption of established episodes, amelioration of symptoms in patients whose episodes cannot be interrupted, aborting episodes during prodromal symptoms, prophylaxis to abolish or lessen the frequency of episodes, and recovery. Complications of ...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章,评审
doi:10.1097/00005176-199501001-00015
更新日期:1995-01-01 00:00:00
abstract::Cholestatic liver disorders account for a large proportion of chronic liver ailments in adults, children and infants, and are among the leading indications for liver transplantation in all age groups. Recent studies have begun to characterize the cellular and molecular mechanisms of hepatocyte injury caused by the ret...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章,评审
doi:10.1097/01.mpg.0000226384.71859.16
更新日期:2006-07-01 00:00:00
abstract:OBJECTIVES:The aim of the study was to characterize the enteral feeding practices in infants after gastrointestinal surgery. METHODS:We performed a retrospective analysis of infants who underwent intestinal surgery at age <6 months who survived to be fed enterally between January 2012 and June 2017. Demographics, surg...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/MPG.0000000000002128
更新日期:2019-02-01 00:00:00
abstract:BACKGROUND:Cisapride is used frequently in premature neonates as a gastrointestinal prokinetic drug. Concerns exist, however, about its safety because of its effect on the QT interval. Premature infants could be at higher risk for side effects because of their immaturity. This prospective study investigated the pharmac...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/00005176-200108000-00015
更新日期:2001-08-01 00:00:00
abstract:OBJECTIVES:The aim of the present study was to evaluate diagnostic performance and actual costs in clinical practice of immumoglobulin (Ig)G/IgA deamidated gliadin peptide antibodies (DGP) as a complement to IgA antibodies against tissue transglutaminase (tTG) for the diagnosis of pediatric celiac disease (CD). METHOD...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/MPG.0b013e3182645c54
更新日期:2012-12-01 00:00:00
abstract:OBJECTIVES:The aim of the study was to assess clinical presentation, endoscopic findings, antibiotic susceptibility and treatment success of Helicobacter pylori (H. pylori) infected pediatric patients. METHODS:Between 2013 and 2016, 23 pediatric hospitals from 17 countries prospectively submitted data on consecutive H...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/MPG.0000000000002816
更新日期:2020-10-01 00:00:00
abstract:OBJECTIVES:Functional dyspepsia (FD) is a functional abdominal pain disorder. There is paucity of data on the economic impact of FD in children. Primary aim of our study was to estimate annual evaluation cost ("diagnosis and visit" cost) and secondary aim was to identify potential prognostic factors of FD in children. ...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/MPG.0000000000002599
更新日期:2020-04-01 00:00:00
abstract:BACKGROUND:Findings in studies in rodents have suggested that epithelial growth of the small intestine is dependent on activation of the immune system. The purpose of this study was to compare changes of postnatal epithelial growth with immunologic activity in humans. METHODS:Duodenal biopsies were obtained by endosco...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/00005176-199805000-00004
更新日期:1998-05-01 00:00:00
abstract:ABSTRACT:Neurogastroenterology and motility (NGM) disorders are common in childhood and are often very debilitating. Although pediatric gastroenterology fellows are expected to obtain training in the diagnosis and management of patients with these disorders, there is an ongoing concern for unmet needs and lack of expos...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/MPG.0000000000002965
更新日期:2021-01-01 00:00:00
abstract::Major events in gastrointestinal ontogeny occur in the infant rat in association with weaning, resulting in striking alterations in small intestinal structure and function. Although the dietary changes attendant to weaning are not essential for the initiation of these events, dietary nutrients have been shown to parti...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/00005176-199002000-00010
更新日期:1990-02-01 00:00:00
abstract:BACKGROUND:Helicobacter pylori infection is generally acquired early in life. However, it is still unknown whether a spontaneous eradication can occur. The purpose of this study was to evaluate whether H. pylori infection can undergo spontaneous eradication in children. METHODS:Three hundred and four Italian children ...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/00005176-199808000-00010
更新日期:1998-08-01 00:00:00
abstract:OBJECTIVES:Little is known about the effect of diet on the oral microbiota of infants, although diet is known to affect the gut microbiota. The aims of the present study were to compare the oral microbiota in breast-fed and formula-fed infants, and investigate growth inhibition of streptococci by infant-isolated lactob...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/MPG.0b013e31826f2bc6
更新日期:2013-02-01 00:00:00
abstract::Thin frozen sections of 11 jejunal biopsies from 10 children at different stages of coeliac disease were stained by immunofluorescence technique using a panel of anti-HLA class I (A, B, C) and anti-HLA class II (DR and DQ) monoclonal antibodies. On the epithelium of flattened mucosa, in contrast with control sections,...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/00005176-198701000-00010
更新日期:1987-01-01 00:00:00
abstract:BACKGROUND:It has been shown that gum arabic, a soluble fiber, enhances water, electrolyte, and glucose absorption from oral rehydration solutions in jejunal perfusion of healthy rats and in animals with theophylline-induced secretion or chronic osmotic-secretory diarrhea. This report concerns a study of the effectiven...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/00005176-199910000-00008
更新日期:1999-10-01 00:00:00
abstract:BACKGROUND:Although the dissociative sedative ketamine is used commonly for pediatric procedural sedation in other settings, the safety of this agent in pediatric gastroenterology is not well-studied. A 5-year experience with ketamine sedation for pediatric gastroenterology procedures was reviewed to document the safet...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/00005176-200101000-00010
更新日期:2001-01-01 00:00:00
abstract::Lactoferrin is an iron-binding protein present in high concentrations in human milk. The efficacy of supplementing iron bound to lactoferrin to iron-deficient and iron-sufficient young mice was evaluated in comparison with supplementation of iron as iron chloride. Mice fed a nonsupplemented milk diet (approximately 1 ...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/00005176-198311000-00021
更新日期:1983-11-01 00:00:00
abstract::This study was designed to establish whether the starting time of breast-feeding (BF) may have affected gut closure for macromolecules during the earliest postnatal period. An increase of serum IgA concentrations was taken as the index of gut permeability to macromolecules. In 14 neonates, BF started 1-6 h after birth...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:10.1097/00005176-198411000-00011
更新日期:1984-11-01 00:00:00
abstract::We assessed the effect of pH on volatilization of short-chain fatty acids during lyophilization. Acetic, propionic, valeric, and butyric acids were added to a fecal homogenate in amounts sufficient to raise the energy density by 18-27%. Fecal homogenate samples were either acidified (pH 2.8-3.2), alkalinized (pH 7.9-8...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:
更新日期:1987-11-01 00:00:00
abstract::A series of recent studies has suggested that preterm infants are capable of breast feeding at weights less than 1,500 g. However, estimating intake during breast feeding for these small infants is important for safe clinical practice and valid research. The purpose of this study was to compare the accuracy of test we...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00005176-199001000-00012
更新日期:1990-01-01 00:00:00
abstract::The development of alkaline phosphatase, maltase, and sucrase activities in the duodenum of the chick embryo was followed in organ culture in chemically defined medium; 14-day duodenum was used in most experiments, with comparisons being made with 18-day tissue. As has been previously shown for the other enzymes, sucr...
journal_title:Journal of pediatric gastroenterology and nutrition
pub_type: 杂志文章
doi:
更新日期:1982-01-01 00:00:00