Abstract:
:Although transient increases in intracellular Ca2+ ([Ca2+]i) underlie a number of important physiological processes, sustained elevations in [Ca2+]i mediate damage to a number of tissues and cell types including gastric mucosal cells. Increases in [Ca2+]i can activate phospholipid hydrolysis via increases in phospholipase A2 (PLA2) activity and subsequent cell injury. In the present study we have examined whether [Ca2+]i-induced gastric cellular injury is mediated by PLA2 activation. Gastric mucosal cells were harvested from rat stomachs after pronase digestion. Cell integrity was assessed using trypan blue dye exclusion and release of lysozomal enzymes. PLA2 activity was estimated colorimetrically by determination of thiol release from the substrate, arachidonyl thio-PC. In these studies calcium ionophore A23187 (3-25 microM) resulted in an increase in cell injury. The damage produced by A23187 (12.5 microM) was inhibited by preincubation of cells with the PLA2 inhibitor, quinacrine (1-100 microM). Quinacrine did not reduce ethanol (10% w/v) mediated-cell damage. Similarly Ca2+ ionophore A23187 treatment resulted in a concentration-dependent increase in PLA2 activity in gastric cells. The increase in PLA2 activity was attenuated if cells were incubated in Ca2+-depleted medium containing EGTA (4 mM). Furthermore lysophospholipids generated by PLA2 (lysophosphatidylethanolamine and lysophosphatidylcholine; 100 microM) also increased the degree of cell injury. Pretreatment of cells with the PAF antagonist WEB 2086 (10(-6) and 10(-5) M), the leukotriene synthase inhibitor 5,6-dehydroarachidonic acid (10 microM), or the thromboxane synthase inhibitor furegrelate (1 microM) decrease A23187-mediated cell injury. These data suggest that Ca2+ ionophore-mediated increases in [Ca2+]i result in gastric cell injury and this effect is mediated in part by PLA2 activation and subsequent release of free fatty acids and lysophosphatides.
journal_name
Dig Dis Scijournal_title
Digestive diseases and sciencesauthors
Tepperman BL,Soper BDdoi
10.1023/a:1026688819939subject
Has Abstractpub_date
1999-03-01 00:00:00pages
494-502issue
3eissn
0163-2116issn
1573-2568journal_volume
44pub_type
杂志文章abstract::Our aim was to understand the mechanism of immunological changes associated with the use of an adsorptive-type extracorporeal device (Adacolumn) that has been developed for selective adsorption of granulocytes and monocytes/macrophages from peripheral blood of patients with active ulcerative colitis. The column is fil...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1023/a:1015330816364
更新日期:2002-06-01 00:00:00
abstract::The effects of the water-soluble and delayed-release formulations of a nonsteroidal antiinflammatory drug, diclofenac, on the healing of gastroduodenal mucosal lesions were compared in a double-blind, double cross-over, placebo-controlled endoscopic study conducted in 14 healthy volunteers. Severe endoscopic lesions (...
journal_title:Digestive diseases and sciences
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF01297025
更新日期:1991-05-01 00:00:00
abstract:BACKGROUND:Notoginsenoside R1 (NG-R1) is the predominant active ingredient and a novel triterpene saponin compound extracted from the roots of Panax notoginseng. To date, to the best of our knowledge, there are no previous studies concerning the effect of NG-R1 on hepatocellular carcinoma (HCC). AIMS:To investigate th...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-019-05856-4
更新日期:2020-05-01 00:00:00
abstract::Vitamin D deficiency is frequently observed in patients with Crohn's disease and may be associated with an increased risk of development of metabolic bone disease. To estimate the incidence of metabolic bone disease by noninvasive methods, 31 patients (17-75 years old) with Crohn's disease and low 25-hydroxyvitamin D ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01536381
更新日期:1989-07-01 00:00:00
abstract::We describe the first reported case of mantle zone lymphoma of the colon presenting as diffuse ileocolitis simulating severe inflammatory bowel disease. This case serves to illustrate the importance of immunohistochemistry in establishing the diagnosis of lymphoma in extranodal sites. ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01300394
更新日期:1992-06-01 00:00:00
abstract::The current cost of endoscopically screening patients with gastroesophageal reflux disease (GERD) and Barrett's esophagus (BE) is considerable. A nonendoscopic device that allows for screening of these patients would offer significant cost savings. This pilot study evaluates the utility of cytologically diagnosing BE ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1023/a:1012771328187
更新日期:2001-12-01 00:00:00
abstract::Nos2 knockout mice were compared to wild-type mice for susceptibility to colitis in response to a diet supplemented with deoxycholate, a bile acid increased in the colon of individuals on a high-fat diet. Wild-type mice fed a fat-related diet, supplemented with 0.2% DOC, develop colonic inflammation associated with in...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-006-9608-0
更新日期:2007-03-01 00:00:00
abstract::The purpose of this study was to investigate the histogenesis of experimental tumors in the rat esophagus. Thirty rats received 0.0015% N-methyl-N-amylnitrosamine (MNAN) in the drinking water for 12 weeks. Another 30 rats received tap water. All rats then received tap water until sacrifice. Rats from each group were s...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01536636
更新日期:1988-01-01 00:00:00
abstract::To study the efficacy of standard blood tests of liver function (LFTs) and technetium-99m liver scan followed by laparoscopy in the diagnosis of solid malignant tumors of the liver, 100 consecutive patients were evaluated who had these tests because of clinical suspicion of liver neoplasm. Malignant liver tumors were ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01333702
更新日期:1979-08-01 00:00:00
abstract::Management of pancreatic cystic lesions relies on patients' clinical presentation, imaging, and endoscopic ultrasound. Current research in basic science, radiology, and endoscopy is evolving and making progress in this condition which is relatively common in the general population. This review focuses on the recent en...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章,评审
doi:10.1007/s10620-017-4544-8
更新日期:2017-07-01 00:00:00
abstract::One hundred sixty-two patients chronically ingesting ibuprofen, piroxicam, or naproxen for osteoarthritis, who had abdominal pain and an endoscopically proven gastric ulcer were evaluated for eight weeks in a randomized, double-blind trial comparing misoprostol (200 micrograms four times daily with meals and at bedtim...
journal_title:Digestive diseases and sciences
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1007/BF01308074
更新日期:1992-12-01 00:00:00
abstract:BACKGROUND AND AIMS:Traditional endoscopic management of benign biliary strictures (BBS) consists of placement of one or more plastic stents. Emerging data support the use of covered self-expandable metal stents (CSEMS). We sought to assess outcome of endoscopic temporary placement of CSEMS in patients with BBS. METHO...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-013-2859-7
更新日期:2014-01-01 00:00:00
abstract::There are no requirements concerning the amplitude of simultaneous contractions among the present criteria for the manometric diagnosis of diffuse esophageal spasm. The purpose of this investigation was to determine whether the current criteria effectively identify an appropriately homogenous patient population. Sixty...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF02088558
更新日期:1996-07-01 00:00:00
abstract::The original version of the article unfortunately contained an error in the surname of the second author, Dr. Ferdinando D'Amico in the author group. ...
journal_title:Digestive diseases and sciences
pub_type: 已发布勘误
doi:10.1007/s10620-020-06613-8
更新日期:2020-09-25 00:00:00
abstract::The aims of this study were to select the patients with a potential for progression to hepatic failure due to lamivudine-resistant HBV and to standardize the treatment for patients with lamivudine-resistant HBV. Patients (n = 47) with reactivated hepatitis due to lamivudine-resistant HBV were classified into two group...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-008-0384-x
更新日期:2008-11-01 00:00:00
abstract::Orlistat (tetrahydrolipstatin) is a potent inhibitor of gastric and pancreatic lipase activity causing a diminution of free fatty acids in the intestinal lumen. The release of cholecystokinin (CCK) critically depends on the presence of free fatty acids in the small intestine. Postprandial CCK release and gallbladder c...
journal_title:Digestive diseases and sciences
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF02100135
更新日期:1996-12-01 00:00:00
abstract::To investigate the colonic adenoma-adenocarcinoma progression sequence, DNA ploidy analysis was performed on hyperplastic polyps to adenocarcinomas. DNA ploidy data were then compared with immunocytochemical staining for proliferating cell nuclear antigen (PCNA). In hyperplastic polyps to villous adenomas, all cases w...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF02064188
更新日期:1995-05-01 00:00:00
abstract:INTRODUCTION:A significant proportion of patients with Crohn's disease (CD) lose response to antibodies directed against tumor necrosis factor α (TNF). Prior TNF-antagonist failure is associated with lower rates of response to subsequent TNF-antagonist therapy. In patients failing two anti-TNF agents, a choice exists b...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-011-1896-3
更新日期:2012-02-01 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::The neutralizing capacity of two antacids (Alucol = A, Syntrogel = S), differing both in their composition and theoretical neutralizing capacity, was evaluated in vitro and in vivo. In vitro at pH 3.5, 1 ml of A or S neutralizes 3.9 and 1.6 meq of acid, respectively, in an aqueous solution. When tested in vivo in the ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01320257
更新日期:1985-06-01 00:00:00
abstract:BACKGROUND:It is not known if genetic background, characteristics at diagnosis, physical and psychological well-being, and adherence to a gluten-free diet are comparable between patients with familial or sporadic celiac disease. These issues were investigated in a follow-up study. METHODS:Altogether 1064 patients were...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-020-06490-1
更新日期:2020-07-23 00:00:00
abstract::Although the pathogenic mechanisms of inflammatory bowel diseases are not fully understood, colonic microbiota may affect the induction of colonic inflammation, and some probiotics and prebiotics have been reported to suppress colitis. The inhibitory effects of brown rice fermented by Aspergillus oryzae (FBRA), a fibe...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-007-0063-3
更新日期:2008-06-01 00:00:00
abstract::The motor function of the gallbladder after partial distal gastrectomy for gastric carcinoma (Billroth-I reconstruction) and its relationship to the motor function of the stomach was investigated using a double-isotope method. In this method, [99mTc]N-54-pyridoxyl-5-methyltryptophan ([99mTc]PMT) was utilized as a trac...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF02064968
更新日期:1995-04-01 00:00:00
abstract:BACKGROUND:Gastric acidification inhibits motilin-induced gastric phase III contractions. However, the underlying mechanism has not been thoroughly investigated. Here, we studied the inhibitory mechanism by gastric acidification on motilin-induced contraction in Suncus murinus (S. murinus). METHODS:We measured interdi...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-015-4023-z
更新日期:2016-06-01 00:00:00
abstract::Our aims were to measure antral axial forces in patients with suspected upper gut dysmotilities and to compare the number of antral contractions detected by an axial force catheter and by manometric sensors in the distal antrum and pylorus. Fifteen patients (2 men, 13 women; mean age 42 years) underwent studies for 3 ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF02213125
更新日期:1996-04-01 00:00:00
abstract::Stimulation of the intrinsic nerves of the esophageal body leads to a twitch of the circular muscle after the end of the stimulation (the esophageal off-response), and the twitch spreads in the distal direction because of a latency gradient in the onset of the off-response between the proximal and the distal esophagus...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01536324
更新日期:1989-04-01 00:00:00
abstract::Choledochoduodenostomy may be followed by the "sump syndrome." This previously required surgical intervention. We describe the successful application of endoscopic therapy in two patients with this syndrome. ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/BF01318873
更新日期:1980-08-01 00:00:00
abstract:BACKGROUND:The overwhelming majority of reported duodenal and colonic SEMS placements in the literature have used the 0.035″ guidewire almost to the exclusion of guidewires of other diameters. AIMS:The purpose of this study was to compare technical and clinical outcomes in patients undergoing duodenal or colonic SEMS ...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-011-1932-3
更新日期:2012-03-01 00:00:00
abstract::Over the past two decades, evidence has accumulated to challenge the traditional view that cardiac mucosa, which is comprised exclusively of mucus glands, is the normal lining of the most proximal portion of the stomach (the gastric cardia). There is now considerable evidence to suggest that cardiac mucosa develops as...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章,评审
doi:10.1007/s10620-018-5063-y
更新日期:2018-08-01 00:00:00
abstract:BACKGROUND AND AIMS:Patients with diarrhea-predominant irritable bowel syndrome (IBS-D) appear to have increased intestinal permeability; it has been suggested that activation of protease-activated receptor-2 (PAR-2) receptors is responsible for this alteration. The aims of this study are to evaluate (1) if rectal (lar...
journal_title:Digestive diseases and sciences
pub_type: 杂志文章
doi:10.1007/s10620-009-1094-8
更新日期:2010-10-01 00:00:00