Abstract:
BACKGROUND & AIMS:Quantitative neurophysiological studies have identified the presence of at least 2 spinal neuronal populations (abrupt and sustained) that are excited by the noxious visceral stimulus colorectal distention. This study examined the effects of the kappa opioid receptor agonists fedotozine and U50488H on the activity of these neurons. METHODS:In decerebrate, cervical spinal cord-transected male rats, the lumbosacral spinal cord was exposed by a laminectomy. Dorsal horn neurons showing excitatory responses to colorectal distention (80 mm Hg, 20 seconds) were identified using microelectrodes. Cumulative doses of fedotozine and U50488H were administered intravenously or intrathecally, and antagonists were used. RESULTS:Intravenous fedotozine and U50488H dose-dependently inhibited the evoked activity of sustained neurons. This inhibition was partially reversed by the kappa opioid antagonist norbinaltorphimine. The same agents had insignificant effects on the evoked activity of abrupt neurons. Fedotozine inhibited spontaneous activity of both abrupt and sustained neurons. Intrathecally administered U50488H had no effect on abrupt or sustained neurons, but intrathecally administered fedotozine inhibited the evoked and spontaneous activity of both groups. CONCLUSIONS:Kappa opioid receptor agonists acting peripherally had differential effects on 2 spinal neuronal populations responsive to colorectal distention. Fedotozine had additional inhibitory effects acting within the spinal cord.
journal_name
Gastroenterologyjournal_title
Gastroenterologyauthors
Ness TJdoi
10.1053/gast.1999.0029900388keywords:
subject
Has Abstractpub_date
1999-08-01 00:00:00pages
388-94issue
2eissn
0016-5085issn
1528-0012pii
S0016508599001596journal_volume
117pub_type
杂志文章相关文献
GASTROENTEROLOGY文献大全abstract:BACKGROUND & AIMS:The effects of trypsin on pancreatic ductal epithelial cells (PDECs) vary among species and depend on the localization of proteinase-activated receptor 2 (PAR-2). We compared PAR-2 localization in human and guinea-pig PDECs, and used isolated guinea pig ducts to study the effects of trypsin and a PAR-...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2011.08.039
更新日期:2011-12-01 00:00:00
abstract:BACKGROUND & AIMS:Colorectal cancer screening with diagnostic imaging can detect polyps. The management of patients whose largest polyp is less than 10 mm is uncertain. The primary aim of this study was to determine rates of advanced histology in patients undergoing colorectal cancer screening whose largest polyp is 9 ...
journal_title:Gastroenterology
pub_type: 杂志文章,多中心研究
doi:10.1053/j.gastro.2008.06.083
更新日期:2008-10-01 00:00:00
abstract::We have developed an isolated intestinal cell system to study the regulation of cholecystokinin release. Enzymatically dispersed canine jejunal mucosal cells were separated by counterflow elutriation to enrich cholecystokinin content 20-fold. Release of cholecystokinin from freshly isolated cells was determined by rad...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(86)90632-3
更新日期:1986-09-01 00:00:00
abstract::In this review, we compared the outcome of 25 studies of experimentally induced pancreatitis in animals with 13 studies of human acute pancreatitis in which the same therapeutic agents were used (aprotinin, glucagon, 5-fluorouracil, somatostatin, peritoneal lavage). Whereas 81% of the animal studies had a positive out...
journal_title:Gastroenterology
pub_type: 临床试验,杂志文章,评审
doi:10.1016/0016-5085(87)90275-7
更新日期:1987-12-01 00:00:00
abstract::We have previously shown that in pregnancy fasting gallbladder volume is increased and emptying after a small volume liquid meal is incomplete. In this study we measured gallbladder volume throughout day and night in healthy women ingesting regular meals. Pregnant women, postpartum women, contraceptive-steroid users, ...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:
更新日期:1982-04-01 00:00:00
abstract:BACKGROUND & AIMS:The activation of Wnt/beta-catenin signaling causes the development of gastric and colon cancers. Sox17 represses Wnt/beta-catenin signaling and is down-regulated in colon cancer. This study was designed to elucidate the role of Sox17 during the course of gastrointestinal tumorigenesis. METHODS:Sox17...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2009.06.041
更新日期:2009-10-01 00:00:00
abstract:BACKGROUND & AIMS:Fish is a rich source of n-3 polyunsaturated fatty acids (PUFAs), such as eicosapentaenoic acid (EPA), docosapentaenoic acid (DPA), and docosahexaenoic acid (DHA). Although consumption of fish and n-3 PUFA has been reported to protect against the development of some types of cancer, little is known ab...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2012.02.018
更新日期:2012-06-01 00:00:00
abstract:BACKGROUND & AIMS:The mechanisms for tissue regeneration and renewal after acute pancreatitis are not well understood but may involve activation of Notch signaling. To study the effect of Notch signaling ablation during acute experimental pancreatitis, we used a chemical and genetic approach to ablate Notch signaling i...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2007.11.003
更新日期:2008-02-01 00:00:00
abstract:BACKGROUND & AIMS:Gastric emptying plays an important role in regulating food intake. This study was designed to investigate whether intraperitoneally injected urocortin reduces gastric emptying, feeding, and body weight in lean and ob/ob obese mice. METHODS:Food intake and body weight were measured after intraperiton...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/s0016-5085(99)70491-9
更新日期:1999-06-01 00:00:00
abstract:BACKGROUND & AIMS:CD8(+) T cells that produce interleukin (IL)-17 (Tc17 cells) promote inflammation and have been identified in tumors. We investigated their role in the pathogenesis of gastric cancer. METHODS:We used flow cytometry analyses to determine levels and phenotype of Tc17 cells in blood and tumor samples fr...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2012.06.010
更新日期:2012-10-01 00:00:00
abstract:BACKGROUND & AIMS:Therapies for perianal fistulas in patients with Crohn's disease are often ineffective in producing long-term healing. We performed a randomized placebo-controlled trial to determine the long-term efficacy and safety of a single local administration of allogeneic expanded adipose-derived stem cells (C...
journal_title:Gastroenterology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1053/j.gastro.2017.12.020
更新日期:2018-04-01 00:00:00
abstract:BACKGROUND & AIMS:Patients with Barrett's esophagus (BE) have a risk of esophageal adenocarcinoma of approximately 0.5% per year. Patients may have difficulty understanding this risk. This study assessed the perceived risk of cancer in patients with BE, and correlated their risk estimates with their health care use beh...
journal_title:Gastroenterology
pub_type: 评论,杂志文章
doi:10.1016/j.gastro.2005.05.055
更新日期:2005-08-01 00:00:00
abstract:BACKGROUND & AIMS:A Western-style diet, which is high in fat and sugar, can cause significant dyslipidemia and nonalcoholic fatty liver disease; the diet has an especially strong effect in women, regardless of total calorie intake. Dietary supplementation with beneficial microbes might reduce the detrimental effects of...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2020.03.010
更新日期:2020-08-01 00:00:00
abstract::A patient who developed symptomatic giardiasis after a tour of the Soviet Union is presented. The diagnosis was established by duodenal aspiration. A small intestinal biopsy revealed total villous atrophy in the absence of celiac sprue or a gastrointestinal immunodeficiency syndrome, a finding not previously described...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:
更新日期:1978-02-01 00:00:00
abstract:BACKGROUND & AIMS:Host cell lipid rafts form a scaffold required for replication of hepatitis C virus (HCV). Serine palmitoyltransferases (SPTs) produce sphingolipids, which are essential components of the lipid rafts that associate with HCV nonstructural proteins. Prevention of the de novo synthesis of sphingolipids b...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2013.06.012
更新日期:2013-10-01 00:00:00
abstract:BACKGROUND & AIMS:Lactase-phlorizin hydrolase (LPH) is an intestinal microvillus membrane glycoprotein that hydrolyzes lactose and phlorizin. These enzymatic activities have been assigned to glutamic acid (E) residues 1271 and 1747 in rabbit LPH. The aim of this study was to determine directly if this assignment was co...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(95)90583-9
更新日期:1995-10-01 00:00:00
abstract:BACKGROUND & AIMS:Cellular and molecular mechanisms of esophageal ulcer healing remain unexplored. We studied the sequential cellular events and the expression of keratinocyte growth factor (KGF) and its receptor (KGF-R) during the healing of experimental esophageal ulcers. METHODS:Esophageal ulcers were produced in r...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/gast.2002.31004
更新日期:2002-02-01 00:00:00
abstract::We investigated the possibility that monocyte suppressor cells play a role in the peripheral lymphocyte hyporesponsiveness of chronic liver disease by utilizing assays of monocyte-mediated suppressor activity in 46 patients with chronic liver disease and 46 controls. The percent change achieved by the addition of indo...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:
更新日期:1982-02-01 00:00:00
abstract::In the TMC435-C101 study, 6 patients infected with hepatitis C virus genotype 1 were treated with the protease inhibitor TMC435 (200 mg once daily) as monotherapy for 5 days. Approximately 1.5 years later, 5 of these patients were re-treated with TMC435 (200 mg once daily) plus pegylated interferon alfa-2a and ribavir...
journal_title:Gastroenterology
pub_type: 临床试验,杂志文章
doi:10.1053/j.gastro.2012.07.117
更新日期:2012-11-01 00:00:00
abstract::The hemodynamic effects of octreotide were studied in 20 patients with hepatitis B-related cirrhosis. In patients receiving a 100-micrograms bolus and a 100-micrograms/h infusion, heart rate, cardiac index, and systemic vascular resistance showed no significant changes, whereas right atrial pressure, pulmonary capilla...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(92)91117-m
更新日期:1992-07-01 00:00:00
abstract::The pathogenesis of gastroesophageal reflux disease (GERD) is complex and involves changes in reflux exposure, epithelial resistance, and visceral sensitivity. The gastric refluxate is a noxious material that injures the esophagus and elicits symptoms. Esophageal exposure to gastric refluxate is the primary determinan...
journal_title:Gastroenterology
pub_type: 杂志文章,评审
doi:10.1053/j.gastro.2017.09.047
更新日期:2018-01-01 00:00:00
abstract:BACKGROUND & AIMS:The morphology of acid damage to esophageal epithelium is characterized by marked cell (swelling) edema. This observation suggests that, in the process of acid damage, an increase in osmotic forces develops within the cell that accounts for the increase in cell water. The aim of this study was to docu...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(95)90328-3
更新日期:1995-08-01 00:00:00
abstract:BACKGROUND & AIMS:Cell stress signaling pathways result in phosphorylation of the eukaryotic translation initiation factor 2 subunit alpha (EIF2S1 or EIF2A), which affects regulation of protein translation. Translation reprogramming mitigates stress by activating pathways that result in autophagy and cell death, to eli...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2017.12.016
更新日期:2018-04-01 00:00:00
abstract:BACKGROUND & AIMS:The ratio of liver size to body weight (hepatostat) is tightly controlled, but little is known about how the physiologic functions of the liver help determine its size. Livers of mice repopulated with human hepatocytes (humanized livers) grow to larger than normal; the human hepatocytes do not recogni...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2015.05.043
更新日期:2015-09-01 00:00:00
abstract:BACKGROUND & AIMS:The molecular basis underlying visceral hypersensitivity in functional irritable bowel syndrome remains elusive, resulting in poor treatment effectiveness. Because alterations in spinal non-neuronal (astrocytic) glutamate reuptake are suspected to participate in chronic pain, we asked whether such pro...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2010.03.003
更新日期:2010-06-01 00:00:00
abstract:BACKGROUND & AIMS:Corticotropin-releasing factor (CRF) signaling pathways play a key role in the stress response through the activation of CRF(1) and CRF(2) receptors. We investigated the CRF receptor subtypes involved in gastric postoperative ileus. METHODS:Adult male mice (C57BL/6, CRF(1)-deficient, and wild-type), ...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/s0016-5085(03)01069-2
更新日期:2003-09-01 00:00:00
abstract::Our objectives in this study were (a) to determine the role of antroduodenal resistance in the control of fasting duodenogastric bile reflux in the dog and (b) to elucidate the contribution of the pylorus both to resistance and to reflux. Thus, we measured simultaneously throughout the interdigestive motor cycle (a) a...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(87)90566-x
更新日期:1987-11-01 00:00:00
abstract:BACKGROUND/AIMS:Growth factors and their receptors play a role in healing ulcers of the rat. Somatostatin is a putative growth factor in the gastric mucosa with multiple functions mediated by specific receptors. Therefore, the distribution of somatostatin receptors was evaluated in the gastric mucosa of healing ulcers....
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(94)90157-0
更新日期:1994-08-01 00:00:00
abstract::In this study, quantitation of the epithelial proliferation status of gastric glands and duodenal crypts was performed using endoscopic biopsy specimens from patients with rheumatological conditions requiring long-term anti-inflammatory and analgesic therapy, testing the hypothesis that long-term administration of non...
journal_title:Gastroenterology
pub_type: 临床试验,杂志文章
doi:10.1016/0016-5085(92)91720-o
更新日期:1992-05-01 00:00:00
abstract:BACKGROUND/AIMS:Hepatic glucuronidation is quantitatively the most important conjugation reaction by which an array of endogenous compounds and xenobiotics undergo biotransformation and detoxification. The active site of the uridine diphosphate (UDP) glucuronosyltransferases, which catalyze glucuronidation reactions, h...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(95)90023-3
更新日期:1995-01-01 00:00:00