Abstract：
:The protein ornithine decarboxylase antizyme (AZ) is inhibitory to both polyamine transport and synthesis. Experiments were performed to examine the distribution and regulation of AZ mRNA in cells of the small intestinal epithelium, a tissue exposed to high concentrations of extracellular polyamines and high levels of ornithine decarboxylase (ODC) activity. AZ mRNA was expressed in acutely isolated epithelial cells of rat jejunum and ileum; expression was higher in proximal than distal small intestine. In cells isolated from jejunal crypt-villus axis, AZ was expressed to high levels in cells from the small intestinal crypts but the message fell to near undetectable levels in cells of the villus tip. Western blot analysis demonstrated that distribution of AZ protein followed the distribution of AZ message. The distribution of ornithine decarboxylase activity along the crypt-villus axis was also determined. ODC activity and ODC protein were higher in cells from the upper villus than in cells isolated from the crypt. The intestinal lumen contains extremely high concentrations of free polyamines. The effect of depletion of endogenous polyamines or the addition of exogenous polyamines on AZ mRNA was evaluated in IEC-6 cells. Cells were depleted of intracellular polyamines by 72 hr of incubation in difluoromethylornithine. The fall in intracellular polyamine content was accompanied by a corresponding fivefold fall in AZ mRNA. When polyamine-depleted cells were treated with putrescine, the level of the AZ mRNA transcript was increased ninefold. These data demonstrate the expression of AZ gene in the longitudinal and crypt-villus axes of rat small intestine and show that AZ gene transcription is modulated by polyamines, an effect which may be involved in product suppression of polyamine synthesis.
journal_name
Dig Dis Scijournal_title
Digestive diseases and sciencesauthors
Gill JE,Christian JF,Seidel ERdoi
10.1023/a:1015886212653subject
Has Abstractpub_date
2002-07-01 00:00:00pages
1458-64issue
7eissn
0163-2116issn
1573-2568journal_volume
47pub_type
杂志文章abstract：BACKGROUND:Diarrhea, a major pathological hallmark of inflammatory bowel disease, is characterized by a significant reduction in the expression and function of key intestinal ion transporters. The adoptive naïve CD4+ T cell transfer colitis is an immune-based, chronic colitis mouse model which resembles human Crohn's d...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-019-05945-4
更新日期：2020-06-01 00:00:00
abstract：BACKGROUND:While the short-term benefits of exclusive enteral nutrition (EEN) for induction of remission in children with Crohn's disease (CD) are well documented, the longer-term outcomes are less clear. AIM:This retrospective study aimed to ascertain the outcomes for up to 24 months following EEN in a group of child...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-012-2232-2
更新日期：2012-08-01 00:00:00
abstract：:Serum levels of immunosuppressive acidic protein (IAP) were determined in 68 patients undergoing resection of colorectal cancer and 21 healthy subjects. Eighteen patients had perioperative transfusion of allogeneic blood (transfused patients) and 50 patients had no blood transfusion (nontransfused patients). Transfuse...
journal_title：Digestive diseases and sciences
pub_type： 临床试验,杂志文章
doi：10.1023/a:1026619111897
更新日期：1999-08-01 00:00:00
abstract：:Squamous cell carcinoma represents the most common primary malignant lesion of the esophagus (1). The initial manifestation of lymphosarcoma infrequently occurs in the gastrointestinal tract, and in one large series, there were no lymphosarcomas presenting in the esophagus (2). In the case described below, a primary h...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01324907
更新日期：1979-11-01 00:00:00
abstract：:Biomagnetic measurements are based on the noninvasive recording of magnetic signals produced by biological sources such as nervous system and muscle. The aim of this study was to obtain multichannel magnetic field recordings from the human gastrointestinal tract and to localize the sources of these signals three-dimen...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1018852208687
更新日期：1998-04-01 00:00:00
abstract：BACKGROUND:Enhanced cell expression of MAdCAM-1 is critical in tissue recruitment of lymphocytes in response to stimuli expressing the α4β7 integrin. MAdCAM-1 is well characterized in gut mucosa with emerging evidence of hepatic expression. AIMS:(i) Compare quantitative/semi-quantitatively MAdCAM-1 expression in relat...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-013-2755-1
更新日期：2013-09-01 00:00:00
abstract：INTRODUCTION:Crohn's disease (CD) follows a relapsing and remitting course incurring cumulative bowel damage over time. The question of whether or not the timing of the initiating biologic therapy affects long-term disease progression remains unanswered. Herein, we calculated rates of change in the Lémann index-which q...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-018-5434-4
更新日期：2019-11-01 00:00:00
abstract：BACKGROUND AND AIMS:Previous studies have demonstrated the value of systematic feedback in enhancing endoscopic procedure performance. It remains unknown whether feedback may play a role in modifying physician performance in outpatient practice. This study aimed to assess the impact of systematic feedback on duration o...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-011-1673-3
更新日期：2011-10-01 00:00:00
abstract：:The development of a fulminant hepatic failure (FHF) model is necessary for evaluating the efficacy of extracorporeal liver support systems. Recognizing the multifaceted functions of the liver, including synthesis and degradation, we investigated blood chemistry, histological findings, and survival rate in D-galactosa...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1010653504568
更新日期：2001-08-01 00:00:00
abstract：BACKGROUND:Ileocolic anastomosis is an essential step in the treatment to restore continuity of the gastrointestinal tract following ileocolic resection in patients with Crohn's disease (CD). However, the association between anastomotic type and surgical outcome is controversial. AIMS:The aim of this meta-analysis is ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章,meta分析
doi：10.1007/s10620-014-3039-0
更新日期：2014-07-01 00:00:00
abstract：BACKGROUND:The Child-Turcotte-Pugh (CTP) score is a widely used and validated predictor of long-term survival in cirrhosis. However, the cutpoints for stratifying laboratory variables in CTP have never been validated. OBJECTIVE:The objective of this study was to identify evidence-based cutpoints for the CTP laboratory...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-016-4239-6
更新日期：2016-11-01 00:00:00
abstract：:The effect of luminal 150 mmol saline, 0.05-0.2% (w/v) lysolecithin, and 5-20% (v/v) ethanol was studied on the mucosal morphology of the proximal small intestine in conscious guinea pigs as well as on the mucosal penetration and transfer to portal venous blood of luminal horseradish peroxidase (HRP). No ultrastructur...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01311253
更新日期：1984-11-01 00:00:00
abstract：:Among the multifactorial causes of undernutrition in old age, gastrointestinal mucosa altered function and resulting specific malabsorption are the most relevant. Despite numerous studies that have dealt with the effects of aging on the digestive tract of mammals, results showed discrepancies in terms of proliferation...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/b:ddas.0000037826.94345.f8
更新日期：2004-08-01 00:00:00
abstract：:The study aimed to examine the serum serological response among H. pylori-infected patients with various upper gastrointestinal diagnoses; to ascertain whether it could be predictive to the diagnostic outcome of dyspepsia. One hundred seventy H. pylori-infected patients with dyspeptic symptoms but without previous tre...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1005460130305
更新日期：2000-04-01 00:00:00
abstract：:The effects of vasoactive intestinal polypeptide (VIP), glucagon, and secretin on lower esophageal sphincter pressure were investigated in awake baboons. The three hormones were compared with respect to effect on (1) resting lower esophageal sphincter pressure and (2) maximal stimulatory response to pentagastrin. VIP ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01297119
更新日期：1979-05-01 00:00:00
abstract：:Colonic mucus is decreased in a rat model of spastic constipation, and some types of water-insoluble dietary fiber increase colonic mucus when consumed by rats for several weeks. However, little is known about the effect of water-soluble dietary fiber on the colonic mucus. The aim of the present study was to investiga...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1010644021888
更新日期：2001-07-01 00:00:00
abstract：BACKGROUND AND AIM:Negative association has been reported between presence of Helicobacter pylori and developing gastroesophageal reflux disease (GERD) and its complications. The aim of this study was to determine whether H. pylori (HP) can be protective against GERD in an African American (AA) population. METHODS:Fro...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-012-2349-3
更新日期：2012-11-01 00:00:00
abstract：:The relationship between the GOT/GPT ratio in nonviral liver disorders and underlying physical condition and life-style were evaluated. The subjects were 12,808 male railway company workers who underwent an annual health checkup. Nonviral liver disorders were defined as elevated transaminases (GOT > 76 IU/liter or GPT...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1017959801493
更新日期：2002-03-01 00:00:00
abstract：:Both increased duodenogastric reflux and chronic aspirin ingestion are associated with the development of gastric ulcers in man. Animal studies suggest aspirin increases duodenogastric reflux. Prostaglandin E2 protects gastric mucosa from the effects of many injurious agents and inhibits gastric motility, but its effe...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01320256
更新日期：1985-06-01 00:00:00
abstract：:A biliary form of the alpha 1-acid glycoprotein (AAG) promotes cholesterol crystallization in the lower-molecular-weight, concanavalin A-bound fraction of gallbladder bile. In addition, bile AAG concentration is higher in cholesterol gallstone patients with multiple stones than in control patients without gallstone di...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF02065520
更新日期：1995-06-01 00:00:00
abstract：BACKGROUND:Controlled attenuation parameter (CAP) has been developed to estimate the extent of hepatic steatosis. AIMS:The purpose was to evaluate the usefulness of CAP in assessing hepatic steatosis and its change using magnetic resonance imaging proton density fat fraction (MRI-PDFF) as reference standard. METHODS:...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-019-05883-1
更新日期：2020-05-01 00:00:00
abstract：BACKGROUND:An imbalance in gut microbiota seems to contribute to the development of chronic inflammatory disorders of the gastrointestinal tract, such as ulcerative colitis (UC). Although it has been suggested that probiotic supplementation is an effective approach to colitis, its effects on intestinal flora and on muc...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章,随机对照试验
doi：10.1007/s10620-010-1384-1
更新日期：2011-04-01 00:00:00
abstract：BACKGROUND:Procedure-induced bleeding is a major complication after endoscopic intervention. AIMS:The aim of this study was to investigate the risk of endoscopy-related bleeding in patients with chronic hematologic thrombocytopenia. METHODS:We investigated endoscopy-related bleeding in 175 procedures performed on 108...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-016-4427-4
更新日期：2017-03-01 00:00:00
abstract：INTRODUCTION:Combined heart-liver transplantation (CHLT) has resulted in acceptable survival rates compared to orthotopic liver transplantation (OLT) alone and orthotopic heart transplantation alone. Using the US transplant registry, we compared outcomes following sequential and combined HLT. METHODS:We conducted a re...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-019-05958-z
更新日期：2020-08-01 00:00:00
abstract：:The role of carbonic anhydrase in the process of proximal duodenal mucosal bicarbonate secretion was investigated in the guinea pig. In a series of experiments in vivo, the duodenum was perfused with 24 mmol/liter NaHCO3 solution (+ NaCl for isotonicity) to ensure that active duodenal HCO3- secretion against a concent...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF02087561
更新日期：1994-05-01 00:00:00
abstract：:Hilar cancers carry a dismal prognosis. Palliation of obstructive jaundice in patients with hilar cancer can be achieved by either surgical or nonsurgical means. Selection of the appropriate palliative measures is a challenging problem. Segmental bilioenteric anastomosis procedures were performed on 19 patients with h...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1005569128877
更新日期：2000-08-01 00:00:00
abstract：:The value of intense nutritional support in inflammatory bowel disease is still debated. Claims have been made that total enteral nutrition is as effective as total parental nutrition. In this review, the use of parenteral and enteral nutritional support as primary therapy in patients with inflammatory bowel disease h...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章,评审
doi：10.1007/BF02064990
更新日期：1995-04-01 00:00:00
abstract：BACKGROUND AND AIMS:Capsule endoscopy (CE) has the problem that lumen visualization is impaired by bubbles, bile, and debris. The benefits of bowel preparation are still controversial and the best method remains to be determined. The objective of this study was to evaluate the effect of the method of bowel preparation ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章,随机对照试验
doi：10.1007/s10620-010-1500-2
更新日期：2011-06-01 00:00:00
abstract：:Little is known about the accuracy of intraesophageal pH monitoring, ie, do false negatives occur? This study was designed based on the assumption that if two pH probes are placed equidistant from a distal acid source, and the probes measure different values, then one probe might miss acid if it were there alone. We p...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01540333
更新日期：1989-05-01 00:00:00
abstract：:Sodium butyrate is a well-recognized differentiating agent inducing alkaline phosphatase activity, one of the epithelial differentiation markers. When IEC6 cells, a nontransformed, small intestinal epithelial cell line, were cultured with butyrate, this substrate induced alkaline phosphate activity in a time- and dose...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1018807524075
更新日期：1998-05-01 00:00:00
