Abstract：
:There is a growing body of experimental and clinical evidence to suggest that oral or rectal administration of 5-ASA or 5-ASA conjugates is associated with significant adverse side effects including pancreatitis, hepatitis, and renal toxicity. The objective of this study was to assess the ability of 5-ASA to interact with low-molecular-weight iron to yield oxygen-derived free radicals and to determine whether these oxidants could damage model biological compounds. We found that 5-ASA was very effective at chelating ferric iron (Fe3+), and it rapidly reduced Fe3+ to the ferrous form (Fe2+). Addition of the 5-ASA/Fe2+ chelate to solutions containing polyunsaturated fatty acids or deoxyribose resulted in lipid peroxidation and oxidative carbohydrate degradation, respectively. These results are consistent with the formation of the highly reactive (and cytotoxic) hydroxyl radical. Formation of this free radical species was confirmed by the ability of hydroxyl radical scavengers (dimethyl sulfoxide, dimethyl thiourea) to inhibit the 5-ASA/Fe-mediated oxidative reactions. Maximum hydroxyl radical formation was achieved at a 5-ASA-to-Fe3+ ratio of 1.0 (20 microM 5-ASA and 20 microM Fe3+). Increasing this ratio significantly inhibited OH. formation with a concomitant reduction in lipid peroxidation and deoxyribose degradation. Finally, we demonstrated that 5-ASA promotes the reductive release of Fe3+ from ferritin. Data obtained in this study suggest that 5-ASA may, under certain conditions, promote the formation of potentially injurious free radical species. These oxidative reactions may contribute to some of the adverse side effects known to be associated with the newer preparations of 5-ASA.
journal_name
Dig Dis Scijournal_title
Digestive diseases and sciencesauthors
Grisham MB,Ware K,Marshall S,Yamada T,Sandhu ISdoi
10.1007/BF01296008subject
Has Abstractpub_date
1992-09-01 00:00:00pages
1383-9issue
9eissn
0163-2116issn
1573-2568journal_volume
37pub_type
杂志文章abstract：:We retrospectively reviewed the role of ursodeoxycholic acid in infants having nonsurgical cholestasis attending the Hepatology Clinic, New Children Hospital, Cairo University, Egypt, from 1985 until 2005. Files of 496 infants with neonatal hepatitis and 97 with intrahepatic bile duct paucity were included; of them 24...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-008-0600-8
更新日期：2009-10-01 00:00:00
abstract：BACKGROUND:Birth characteristics, including weight and gestational age, may be associated with risk of Barrett's esophagus (BE), the only known precursor for esophageal adenocarcinoma; however, data are limited. AIMS:To examine associations between various birth characteristics and BE, and whether these associations a...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-015-3967-3
更新日期：2016-04-01 00:00:00
abstract：BACKGROUND:Nonalcoholic fatty liver disease (NAFLD) is now recognized as a leading cause of liver dysfunction. Gastroesophageal reflux disease (GERD) is a common disorder causing symptoms that often impair patients' quality of life. In recent years, the prevalence of both these diseases has increased, partially overlap...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-014-3113-7
更新日期：2014-08-01 00:00:00
abstract：:The effects of ecabet sodium (ecabet), 12-sulfodehydroabietic acid monosodium salt, on gastric mucin biosynthesis in rat antrum were compared with those in the corpus. Intragastric administration of ecabet significantly increased [3H]glucosamine incorporation into antral mucin as well as into corpus mucin during five ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1005469913079
更新日期：2000-03-01 00:00:00
abstract：:We investigated whether S-adenosyl-L-methionine (SAMe) influences the inhibitory effect of ethanol on bile secretion and ethanol hepatotoxicity in the isolated perfused rat liver. SAMe (25 mg/kg intramuscularly three times a day) was administered for three days consecutively. Liver was then isolated and perfused with ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF02285216
更新日期：1995-07-01 00:00:00
abstract：:Metoclopramide tablets have been approved for use in the acute and chronic management of diabetic gastroparesis. Its efficacy as an antiemetic has been well documented. We measured the acute and chronic effects of oral metoclopramide on gastric liquid emptying in 12 diabetic patients with symptoms of stasis using scin...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01318364
更新日期：1985-01-01 00:00:00
abstract：INTRODUCTION:Voluntary muscle activity, including swallowing, decreases during the night. The association between nocturnal awakenings and swallowing activity is under-researched with limited information on the frequency of swallows during awake and asleep periods. AIM:The aim of this study was to assess nocturnal swa...
journal_title：Digestive diseases and sciences
pub_type： 临床试验,杂志文章
doi：10.1007/s10620-012-2474-z
更新日期：2013-04-01 00:00:00
abstract：:The destruction of the integrity of the gastric epithelial barrier underlies the pathology of many gastric diseases, including gastric tumors. The Helicobacter pylori virulence factor CagA is one of the main destroyers of the gastric epithelial barrier. There are differences among CagA proteins that originate from dif...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章,评审
doi：10.1007/s10620-013-2589-x
更新日期：2013-07-01 00:00:00
abstract：BACKGROUND:Liver fibrosis is a common scarring response to chronic liver injury. It is a precursor to cirrhosis and liver carcinoma. Hepatic stimulator substance (HSS), a known liver-specific but species-nonspecific growth factor, has been shown to protect hepatocytes from various toxins. METHODS:We have investigated ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-012-2168-6
更新日期：2012-08-01 00:00:00
abstract：:The objective of this study was to determine if HCV can be transmitted from patient to patient in psychiatric institutions and to determine possible routes of infection. We did a cross-sectional survey of 196 Japanese psychiatric patients tested for HCV and HBV markers and 400 age- and sex-matched controls. Anti-HCV w...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1005472812403
更新日期：2000-02-01 00:00:00
abstract：:Hepatic vein thrombosis (Budd-Chiari syndrome) is a rare complication of ulcerative colitis and has not previously been reported in association with Crohn's disease. We here report the first known case of Crohn's disease presenting as the Budd-Chiari syndrome. ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01536715
更新日期：1989-12-01 00:00:00
abstract：:Viral dynamic studies in chronic hepatitis C virus (HCV) infection indicate a significantly shortened survival of virus-infected cells. Since at the steady state of chronic viral infection, the rate of infected cell elimination equals new cell regeneration, this would imply a high rate of hepatocyte turnover in chroni...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1015800126283
更新日期：2002-07-01 00:00:00
abstract：:In the pathogenesis of gastroesophageal reflux disease (GERD), gastric acid is considered to be one of the most important factors, but little is known about the degree of gastric acid secretion in GERD patients. In this study, we evaluated it in GERD patients and control subjects by 24-h intragastric pH, and serologic...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/b:ddas.0000030090.84412.2a
更新日期：2004-05-01 00:00:00
abstract：:Concordance between gram-negative enteric and other toxin-producing bacteria in blood and stool culture, endotoxin (lipopolysaccharide), and interleukin-6 (IL-6) was measured in 60 preterm infants (600-1600 g) as a clinical index in neonatal necrotizing enterocolitis (NEC). E. coli, Klebsiella, Enterobacter, and Clost...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1018826204819
更新日期：1997-02-01 00:00:00
abstract：:Cholecystokinin (CCK) decreases lower esophageal sphincter pressure (LESP) in man. Cholestyramine, a nonabsorbable bile salt binding resin, stimulates endogenous CCK secretion. We have investigated the effect of oral ingestion of 16 g cholestyramine without and with infusion of the CCK receptor antagonist CR1505 (loxi...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01296114
更新日期：1993-10-01 00:00:00
abstract：:The involvement of oxygen free radicals in the development of the ethanol-induced gastric mucosal damage has been investigated. We found that oral administration of superoxide dismutase reduced the incidence of ethanol-induced mucosal lesions. Reduction of superoxide dismutase activity by diethyldithiocarbamate led to...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01550977
更新日期：1988-07-01 00:00:00
abstract：:The time-dependent appearance of phospholipase A2 (PLA2) activity in the preservation media of ischemic rat intestinal grafts is described. In controls, Ca2+-dependent, secretory PLA2 activity accumulated rapidly during the first 6 hr of ischemia, followed by a linear increase for up to 48 hr. LDH levels, by contrast,...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1018876717308
更新日期：1997-05-01 00:00:00
abstract：:Chemiluminescence (CL) analysis of monocytes and polymorphonuclear cells (PMNs) was performed on 13 patients with Crohn's disease (CD) and 10 healthy volunteers. The percentages of monocyte populations in mononuclear cells obtained from the patients with CD were greater than those from the healthy volunteers, but the ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01535990
更新日期：1988-08-01 00:00:00
abstract：:A model for gastric mucosal injury is proposed in which a key pathogenetic event is the disruption in the normal relationships among several circadian rhythms of gastric function. In the rat a circadian rhythm in acid secretion was found to be out of phase with a circadian rhythm in gastric pepsin secretion, another a...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF02087766
更新日期：1994-08-01 00:00:00
abstract：:The wound-healing property of Preparation-H, a widely used over-the-counter hemorrhoidal product was investigated in a randomized, controlled, double-blind trial. Artificial ulcers were created in the rectum of 12 healthy male volunteers and the size of these ulcers followed until complete healing by visual examinatio...
journal_title：Digestive diseases and sciences
pub_type： 临床试验,杂志文章
doi：10.1007/BF01318426
更新日期：1984-09-01 00:00:00
abstract：:In a Caucasian woman with a history of ocular and pulmonary sarcoidosis, the occurrence of sclerosing peritonitis with exudative ascites but without any of the well-known causes of this syndrome prompts us to consider that sclerosing peritonitis is a manifestation of sarcoidosis. The dramatic improvement that occurred...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01299875
更新日期：1992-11-01 00:00:00
abstract：:Alterations in insulin and glucagon levels might account for the plasma amino acid imbalance of cirrhotics. In order to verify this hypothesis we evaluated basal insulin, glucagon, branched-chain amino acids, aromatic amino acids, and free tryptophan in 13 controls and 37 cirrhotics divided on the basis of their menta...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01333703
更新日期：1979-08-01 00:00:00
abstract：:Gastrointestinal motor dysfunction persists in a large number of children subjected to surgical treatment for Hirschsprung's disease, indicating abnormalities in the remaining intestine. The aim of the study was to detect possible alterations in frequency and topographic distribution of enteric neurons and interstitia...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1015085923245
更新日期：2002-05-01 00:00:00
abstract：:Nitric oxide appears to play an important role in maintaining gastric mucosal integrity. This study aimed to investigate whether a nitric oxide donor (sodium nitroprusside) or stimulation of endogenous nitric oxide synthesis (with acetylcholine) protects against gastric ischemia-reperfusion injury. Rats were subjected...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF02090210
更新日期：1994-02-01 00:00:00
abstract：:Chronic pancreatitis associated with inflammatory bowel disease is now considered as extraintestinal manifestation of that disease. The clinical and radiological features of the new entity are markedly different from those of chronic calcifying pancreatitis. We report the case of a 68-year-old man presenting with a ps...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1010733308228
更新日期：2001-04-01 00:00:00
abstract：:Cytomegalovirus (CMV) inclusions were found at colonic perforation sites in three patients with clinical settings suggesting a compromised immunologic status. This could be interpreted as: (1) CMV was an etiologic agent in these perforations; or (2) CMV was an opportunistic superinfection in areas of preexisting infla...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01297124
更新日期：1979-05-01 00:00:00
abstract：:This work studied the effects of hydrocortisone treatment in experimental acute pancreatitis on cytokines, phospholipase A2, and breakdown products of arachidonic acid and survival. Edematous and necrotizing pancreatitis were induced in Wistar rats by cerulein hyperstimulation and retrograde intraductal infusion of so...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1011902729392
更新日期：2001-10-01 00:00:00
abstract：:Hepatitis C virus (HCV) infection has an estimated prevalence of 3% around the world. Unfortunately, many persons with HCV infection are asymptomatic. The aim of this study was to determine the prevalence of hepatitis C Virus infection in asymptomatic persons. This study was carried out in a population-based cross-sec...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-005-2565-1
更新日期：2005-04-01 00:00:00
abstract：:The purpose of this study is to determine the long-term relapse rate and associated risk factors in HBeAg-positive chronic hepatitis B (CHB) patients who had maintained virologic response (VR) for 1 year after lamivudine (LMV) discontinuation. We enrolled 55 treatment-naive HBeAg-positive CHB patients who achieved and...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-008-0508-3
更新日期：2009-07-01 00:00:00
abstract：BACKGROUND:Double-balloon enteroscopy (DBE) is a safe and useful procedure for managing small bowel bleeding. However, there are limited studies regarding the preferable timing of DBE and its impact on long-term outcomes. AIM:We aimed to evaluate the association between the timing of DBE and the long-term outcomes of ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-019-05627-1
更新日期：2019-10-01 00:00:00
