Abstract:
OBJECTIVE:The regulation of apoptosis of intestinal mucosal cells is important in maintenance of normal intestinal physiology. SUMMARY:Sphingosine-1-phosphate (S1P) has been shown to play a critical role in cellular protection to otherwise lethal stimuli in several nonintestinal tissues. METHODS:The current study determines whether S1P protected normal intestinal epithelial cells (IECs) from apoptosis and whether Akt activation was the central pathway for this effect. RESULTS:S1P demonstrated significantly reduced levels of apoptosis induced by tumor necrosis factor-alpha (TNF-alpha)/cycloheximide (CHX). S1P induced increased levels of phosphorylated Akt and increased Akt activity, but did not affect total amounts of Akt. This activation of Akt was associated with decreased levels of both caspase-3 protein levels and of caspase-3 activity. Inactivation of Akt by treatment with the PI3K chemical inhibitor LY294002 or by overexpression of the dominant negative mutant of Akt (DNMAkt) prevented the protective effect of S1P on apoptosis. Additionally, silencing of the S1P-1 receptor by specific siRNA demonstrated a lesser decrease in apoptosis to S1P exposure. CONCLUSION:These results indicate that S1P protects intestinal epithelial cells from apoptosis via an Akt-dependent pathway.
journal_name
Dig Dis Scijournal_title
Digestive diseases and sciencesauthors
Greenspon J,Li R,Xiao L,Rao JN,Marasa BS,Strauch ED,Wang JY,Turner DJdoi
10.1007/s10620-008-0393-9subject
Has Abstractpub_date
2009-03-01 00:00:00pages
499-510issue
3eissn
0163-2116issn
1573-2568journal_volume
54pub_type
杂志文章abstract:BACKGROUND:Partially covered metal stents (PCMS) have been increasingly used for both malignant and benign biliary indications. This study reports their complications and subsequent management. METHODS:Over 5 years, all patients receiving biliary PCMS were followed prospectively until stent-related dysfunction or deat...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-009-0756-x
更新日期:2010-02-01 00:00:00
abstract::Plasma pancreatic polypeptide (PP) responses to food, secretin (1 CU/kg, intravenous) and bombesin (60 pmol/kg/20 min intravenous) were compared in 14 normal subjects and in 17 patients with chronic pancreatitis and pancreatic insufficiency. Basal plasma PP concentrations were significantly higher in normal subjects t...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01317049
更新日期:1984-02-01 00:00:00
abstract::We evaluated the sequence diversity of the hypervariable region 1 (HVR1) of hepatitis C virus (HCV) in HCV-infected patients in whom the mode of transmission is unknown. The sequence diversity of HVR1 in 26 Japanese patients with chronic HCV infection of unknown mode of transmission (UT) was compared with 17 patients ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1023/a:1026693512265
更新日期:1999-10-01 00:00:00
abstract::Over a one-year period, 95 children and adolescents presenting with epigastric pain and/or vomiting, and without associated risk factors for development of peptide disease, underwent endoscopic antral biopsies for pathologic diagnosis and to detect presence of Campylobacter ss. pylori (C. pylori). Additional biopsies ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01537100
更新日期:1989-10-01 00:00:00
abstract:BACKGROUND:The relationship of gastric cancer to the presence of interleukin-8 (IL-8) 251 T/A has been reported with conflicting results. AIM:To further explore the association of IL-8 251 allele polymorphism with gastric cancer susceptibility. METHODS:We performed an extensive search of relevant studies and carried ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章,meta分析,评审
doi:10.1007/s10620-009-0978-y
更新日期:2010-07-01 00:00:00
abstract:BACKGROUND:HIV progression is characterized by immune activation and microbial translocation from the gut. Short-chain fatty acids (SCFAs) are essential for gut homeostasis. Decreased intestinal SCFAs play a role in rapid HIV progression. AIMS:To compare the SCFA profile, intestinal microbiome, and intestinal mucosal ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-018-5428-2
更新日期:2019-07-01 00:00:00
abstract:BACKGROUND:Liver metastasis is an indicator of unfavorable responses to immunotherapy in colorectal cancer patients. However, the difference of immune microenvironment between primary tumors and liver metastases has not been well understood. PATIENTS AND METHODS:Fifty-four colon cancer with liver metastasis patients w...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-020-06203-8
更新日期:2020-03-19 00:00:00
abstract::Manometry is considered the gold standard for evaluating sphincter of Oddi dysfunction. It has recently been demonstrated that the ultrasound (US) secretin test proposed a few years ago as a noninvasive test for the study of sphincter of Oddi dysfunction yields a substantial percentage of pathological findings in pati...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1023/a:1026658618605
更新日期:1999-02-01 00:00:00
abstract::We have studied three patients with chronic HBV infection who had a superimposed bout of type A hepatitis. The patients recovered uneventfully without observing a change in their clinical course afterwards. In one patient we observed transient disappearance of DNA polymerase during type A hepatitis; we have postulated...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01312556
更新日期:1983-08-01 00:00:00
abstract:BACKGROUND:Nonalcoholic fatty liver disease (NAFLD) is one of the most common liver diseases in affluent countries. Recent studies have reported that circular RNAs (circRNAs) are important regulators of hepatic steatosis. However, the role and mechanism of circRNA in NAFLD are poorly understood. AIMS:This study is to ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-018-5290-2
更新日期:2019-01-01 00:00:00
abstract::The literature regarding the effect of nicotine and cigarette smoke on gastric blood flow is conflicting. The hydrogen gas clearance technique was used to measure the effects of nicotine and cigarette smoke on basal gastric mucosal blood flow in anesthetized rats. Blood flow was measured before, during, and after trea...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01320320
更新日期:1986-05-01 00:00:00
abstract:BACKGROUND:The receptor for formylated peptides, formyl peptide receptor 1 (FPR1), potently activates and serves as a chemoattractant receptor for neutrophils. AIM:Given the abundance of neutrophils in the inflamed colon, our aim was to determine if the FPR1 mediates colonic neutrophil migration, using the dextran sod...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-012-2082-y
更新日期:2012-07-01 00:00:00
abstract::The mechanisms of pentagastrin-induced gastric mucosal blood flow (GMBF) response were investigated in anesthetized rats. A rat stomach was mounted on an ex vivo chamber, perfused with saline, and GMBF was measured by a laser Doppler flowmetry simultaneously with acid secretion. Pentagastrin infused intravenously prod...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF02282323
更新日期:1996-03-01 00:00:00
abstract::We explored the function of the intestine's mucosal barrier to foreign antigen entry in Crohn's disease. Macroscopically and microscopically uninvolved areas of the small intestines of patients with Crohn's disease were examined. We studied 27 endoscopic biopsy samples from 17 patients with Crohn's disease and 14 samp...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF02088568
更新日期:1996-07-01 00:00:00
abstract::H. pylori may colonize columnar-lined esophagus, although an etiologic role in esophageal adenocarcinoma is unproven. H. pylori can adhere to intestinal metaplasia in the stomach. This study was designed to examine if H. pylori adheres to specialized intestinal metaplasia in columnar-lined esophagus. Esophageal biopsi...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1023/a:1026628307895
更新日期:1999-06-01 00:00:00
abstract:BACKGROUND:Proton pump inhibitors (PPIs) may reduce the risk of esophageal adenocarcinoma (EAC) in patients with Barrett's esophagus. PPIs are prescribed for virtually all patients with Barrett's esophagus, irrespective of the presence of reflux symptoms, and represent a de facto chemopreventive agent in this populatio...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-014-3186-3
更新日期:2014-06-01 00:00:00
abstract:BACKGROUND:Colorectal cancer (CRC) screening is cost-effective and prevents death from CRC if used appropriately. Physicians do not recommend CRC screening according to guidelines. Physician-related factors associated with CRC screening knowledge are unknown. AIMS:We tested the accuracy of CRC screening knowledge in a...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-018-5339-2
更新日期:2019-02-01 00:00:00
abstract:BACKGROUND:COVID-19 has caused a backlog of endoscopic procedures; colonoscopy must now be prioritized to those who would benefit most. We determined the proportion of screening and surveillance colonoscopies appropriate for rescheduling to a future year through strict adoption of US Multi-Society Task Force (USMSTF) g...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-020-06539-1
更新日期:2020-08-16 00:00:00
abstract::We report the findings in two sisters with active cirrhosis and an anti-liver-kidney microsomal antibody (anti-LKM) of the autoimmune type. This unusual disease is characterized by the presence of high levels of antibodies that react with the smooth and rough endoplasmic reticulum of the liver and other tissues. Our p...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01296532
更新日期:1986-11-01 00:00:00
abstract:UNLABELLED:Recent evidence suggests a role for gut bacteria and antibiotics in the pathophysiology and treatment of irritable bowel syndrome (IBS), respectively. While the benefits of the antibiotic rifaximin have demonstrated efficacy and durable improvement in symptoms over 3 months, the long-term need for retreatmen...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-011-1728-5
更新日期:2011-07-01 00:00:00
abstract::Two patients are presented having lymphomatous involvement of the central nervous system in whom dysphagia was the predominant symptom. All indicated studies failed to reveal evidence of direct esophageal involvement, and the dysphagia improved during treatment of the neural component. Esophageal manometric studies re...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01311710
更新日期:1982-02-01 00:00:00
abstract::Extraintestinal symptoms are often found in patients with irritable bowel syndrome (IBS). Recent studies suggest that IBS is associated with bronchial hyperresponsiveness. But it is still arguable that the bronchial hyperresponsiveness is associated with IBS patients. The purpose of this study is to investigate the po...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-005-2916-y
更新日期:2005-09-01 00:00:00
abstract::The aims of this study were to evaluate (i) the relationship between transpyloric flow (TF) assessed by Doppler ultrasonography and scintigraphy, (ii) the effects of healthy aging on TF and gastric emptying (GE), and (iii) the relationship between the glycemic response to oral glucose and TF. Ten healthy "young" (7 M,...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-005-2555-3
更新日期:2005-04-01 00:00:00
abstract::The 1993 Milwaukee Cryptosporidium outbreak posed several questions regarding appropriate management and prognosis of inflammatory bowel disease patients acutely infected with this organism. We prospectively identified and monitored 12 patients with stable ulcerative colitis or Crohn's disease who suffered abrupt clin...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1023/a:1018828507990
更新日期:1997-08-01 00:00:00
abstract:BACKGROUND:Trinitrobenzenesulfonic acid (TNBS)-induced colitis is one of the most widely used experimental colitis models. However, there is no standard procedure for inducing colitis by TNBS because it is difficult to achieve a uniform distribution of colitis. We have developed a modified method of murine TNBS-induced...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-013-3023-0
更新日期:2014-07-01 00:00:00
abstract::Theoretically, relative distal common bile duct obstruction due to sphincter of Oddi dysfunction may be a cause of poor gallbladder evacuation observed on quantitative cholescintigraphy. In this study, the relationship of sphincter of Oddi dysfunction to the gallbladder ejection fraction by quantitative cholescintigra...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF02090199
更新日期:1994-02-01 00:00:00
abstract::Although viral hepatitis infection is known to be associated with aplastic anemia, a causal link between viral hepatitis and aplastic anemia has not been convincingly demonstrated. A case of hepatitis B-associated severe aplastic anemia is described which only partially responded to conventional immunosuppressive trea...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1023/a:1016444611997
更新日期:2002-08-01 00:00:00
abstract:BACKGROUND:MELD attempts to objectively predict the risk of mortality of patients with liver cirrhosis and is commonly used to prioritize organ allocation. Despite the usefulness of the MELD, updated metrics could further improve the accuracy of estimates of survival. AIMS:To assess and compare the prognostic ability ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-018-5360-5
更新日期:2019-02-01 00:00:00
abstract::Activation of peroxisome proliferator-activated receptor gamma (PPARgamma) has been shown to inhibit the proliferation of gastric cancer cells. A common polymorphism at codon 12 of this gene (Pro12Ala) has been shown to confer protection against diabetes and colorectal cancer. We investigated the influence of PPARgamm...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-007-9944-8
更新日期:2008-03-01 00:00:00
abstract::Intravenous lidocaine was infused at 0.82 ml/min in a concentration of 1.2 mg/ml (2.3 mg/kg) for 120 min in awake chair-restrained baboons (Papio anubis), and measurements of esophageal peristalsis and LES pressure were compared before and after lidocaine or control infusions. Lidocaine produced a progressive and sign...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01315607
更新日期:1985-11-01 00:00:00