Abstract:
OBJECTIVE:We have previously identified that primary human hepatocellular carcinoma (HCC) is associated with altered guanine nucleotide regulatory protein (G-protein) expression concomitant with decreased adenylyl cyclase (AC) and increased mitogen activated protein kinase (MAPK) activity in vivo. This study aims to address the potential link between Gs protein regulation of AC activity/ cyclic adenosine monophosphate (cAMP) production and the subsequent downstream regulation of MAPK activity and mitogenesis. DESIGN:Pharmacological agents which selectively interact with specific target proteins involved in signal transduction via the Gs-AC-cAMP-MAPK signalling pathway were employed in cultured human HCC cell lines in these studies. These agents allow us to address the role of individual components of these pathways in the regulation of mitogenesis in HCC. METHODS:These studies utilized three distinct human HCC cell lines (HepG2, Hep3B and SKHep) in the absence and presence of agents that alter AC-cAMP dependent signalling. De novo DNA synthesis was determined as a marker of altered cellular proliferation, and MAPK activity was determined as the ability to catalyse myelin basic protein (MBP) phosphorylation. RESULTS:8-Bromo-cAMP (8-Br-cAMP; a cell-permeable cAMP analogue) and forskolin (AC activator) dose-dependently decreased thymidine incorporation in all three cell lines. In addition, serum-stimulated [3H] thymidine incorporation was significantly decreased in HepG2, Hep3B and SKHep cell lines following treatment with either 8-Br-cAMP or forskolin. By contrast, MDL12330A (MDL; irreversible AC inhibitor) enhanced thymidine incorporation in all three cell lines. Treatment with either 8-Br-cAMP or forskolin significantly decreased serum-stimulated MAPK activity. CONCLUSIONS:These data suggest that cAMP acts as an anti-mitogenic agent in these hepatic tumorigenic cell lines in vitro such that inhibition of AC activity promotes MAPK activity and cellular mitogenesis in HCC.
journal_name
Eur J Gastroenterol Hepatoljournal_title
European journal of gastroenterology & hepatologyauthors
Schmidt CM,McKillop IH,Cahill PA,Sitzmann JVdoi
10.1097/00042737-199912000-00009subject
Has Abstractpub_date
1999-12-01 00:00:00pages
1393-9issue
12eissn
0954-691Xissn
1473-5687journal_volume
11pub_type
杂志文章abstract:BACKGROUND/AIMS:As a module of a standard ultrasound imaging device, acoustic radiation force impulse (ARFI) is a new technology for liver stiffness evaluation (LSE). We aimed to evaluate accuracy, feasibility, reproducibility, and training effect of ARFI for liver fibrosis evaluation. METHODS:One hundred and one pati...
journal_title:European journal of gastroenterology & hepatology
pub_type: 临床试验,杂志文章
doi:10.1097/MEG.0b013e328339e0a1
更新日期:2010-09-01 00:00:00
abstract:BACKGROUND:This study aimed to investigate the association between nonalcoholic fatty pancreas disease and the severity of acute pancreatitis (AP). PATIENTS AND METHODS:Among the 1662 AP patients admitted between August 2010 and August 2017, 82 eligible patients with moderately severe acute pancreatitis (SAP) and SAP ...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/MEG.0000000000001477
更新日期:2019-08-01 00:00:00
abstract::End-stage liver disease and its related complications exert a huge disease burden and reduce the survival rates of many patients. Albumin administration for patients with decompensated liver cirrhosis has been a controversial topic of discussion. The aim of this study is to investigate whether albumin reduces the mort...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/MEG.0000000000001932
更新日期:2020-09-23 00:00:00
abstract:OBJECTIVES:Perforated jejunal diverticulitis (PJD) is rare, but it has high mortality rates. The role of nonsurgical management is debated. The aim of this study is to assess the outcomes of medical and surgical management of PJD. PATIENTS AND METHODS:A single-centre study on a series of emergency patients diagnosed w...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/MEG.0000000000001265
更新日期:2019-01-01 00:00:00
abstract:OBJECTIVE:To evaluate the clinical presentation, biochemical (ascites and serum) and laparoscopic findings, and to assess the efficacy of triple antituberculous therapy without rifampicin for 6 months in patients with tuberculous peritonitis. METHODS:Twenty-six tuberculous peritonitis patients (11 male, 15 female) wit...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/00042737-200105000-00019
更新日期:2001-05-01 00:00:00
abstract:OBJECTIVE:To study the effect of supplemental calcium carbonate on faecal water, calcium, bile acid and lipid concentration and output in intestinal bypass subjects with diarrhoea. DESIGN:Prospective, single-arm treatment trial of oral calcium carbonate, 2400 or 3600 mg Ca2+ per day, given for 12 weeks. METHODS:Faeca...
journal_title:European journal of gastroenterology & hepatology
pub_type: 临床试验,杂志文章
doi:10.1097/00042737-199606000-00012
更新日期:1996-06-01 00:00:00
abstract:OBJECTIVE:To determine whether alpha 1-antitrypsin deficiency is involved in the pathogenesis of chronic liver disease in patients with porphyria cutanea tarda and in their recently described high prevalence of hepatitis C virus infection. DESIGN:Consecutive patients diagnosed as having porphyria cutanea tarda and chr...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/00042737-199604000-00018
更新日期:1996-04-01 00:00:00
abstract:OBJECTIVES:The factors associated with hepatitis C virus (HCV) treatment uptake and responses were assessed among HCV/HIV co-infected individuals referred for HCV therapy at an urban HIV clinic. METHODS:Retrospective review of HIV/HCV patients enrolled in the HCV treatment program at the John Ruedy Immunodeficiency Cl...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/MEG.0b013e328341ef54
更新日期:2011-01-01 00:00:00
abstract:BACKGROUND:Increasing HDL cholesterol concentrations by stimulating de-novo apolipoprotein A-I (apoA-I) production in the liver and/or in the small intestine is a potential strategy to reduce coronary heart disease risk. Although there is quite some knowledge concerning regulatory effects in the liver, less is known co...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/meg.0b013e328321b0c8
更新日期:2009-06-01 00:00:00
abstract:OBJECTIVE:COX-2, the inducible isoenzyme, was found to be overexpressed in approximately 85% of colorectal adenocarcinomas, contributing to key steps in tumor development. COX-2 polymorphisms that might modify the levels of protein expression would be anticipated to have a substantial influence on disease phenotype. Th...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/MEG.0b013e3283352cbb
更新日期:2010-05-01 00:00:00
abstract::Adult Still's disease is a well-characterized rheumatic disorder of unknown origin, which may affect multiple organs and may have a fatal course. However, liver failure has rarely been described in adult Still's disease. We present the case of a 25-year-old woman who was admitted with acute liver failure 2 years after...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/00042737-200301000-00015
更新日期:2003-01-01 00:00:00
abstract:OBJECTIVE:The actual degree of pain or discomfort experienced during colonoscopy varies between patients. This prospective study was conducted to determine what variables, apart from the endoscopist's skill, are associated with a patient's discomfort during this procedure. DESIGN/METHODS:From December 2003 to Septembe...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/01.meg.0000219097.32811.24
更新日期:2007-08-01 00:00:00
abstract:OBJECTIVE:Short bowel syndrome patients frequently experience impaired health-related quality of life. This syndrome is also associated with increased costs for the individuals concerned and the community. Intake of specially processed cereals has been demonstrated to decrease intestinal secretion. This study evaluates...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/MEG.0b013e328303c00a
更新日期:2008-11-01 00:00:00
abstract:OBJECTIVE:Ileocaecal resection is the most common operation performed in Crohn's disease. Our study aimed to identify the risk factors for anastomotic recurrence following primary ileocaecal resection. PATIENTS AND METHODS:We retrospectively analysed data from all Crohn's disease surgical patients in a single colorect...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/MEG.0000000000001206
更新日期:2018-10-01 00:00:00
abstract::A 27-year-old woman with chronic renal failure, who had been treated with chronic ambulatory peritoneal dialysis and had developed sclerosing peritonitis, was admitted to the hospital with intra-abdominal sepsis. In spite of antibiotic therapy, sepsis recurred and was associated with intrahepatic cholestasis. In addit...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/00042737-199801000-00017
更新日期:1998-01-01 00:00:00
abstract:BACKGROUND:Data from studies in patients with nonalcoholic steatohepatitis (NASH) suggest an increased hepatic fatty acid oxidation. We have previously shown higher fasting plasma bile acid concentrations in patients with NASH. In-vivo and in-vitro studies suggest that bile acids by binding to peroxisome proliferator-a...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/MEG.0b013e328345c8c7
更新日期:2011-05-01 00:00:00
abstract:BACKGROUND:Hereditary angioneurotic oedema (HAE) is a rare cause of ascites. As acute abdominal attacks of the disease can mimic surgical emergencies, prompt and accurate diagnosis is essential. This study was undertaken to evaluate the usefulness of serial abdominal ultrasound (US) examinations. PATIENTS AND METHODS:...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/00042737-200110000-00016
更新日期:2001-10-01 00:00:00
abstract:BACKGROUND AND AIM:The accurate detection of synchronous neoplasia is important to reduce the risk of recurrence after endoscopic resection. Trimodal imaging endoscopy (TMIE) was developed for this purpose. Our aim was to compare the effects of TMIE and white-light imaging endoscopy (WLIE) in gastric neoplasia detectio...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/MEG.0000000000000278
更新日期:2015-03-01 00:00:00
abstract:OBJECTIVES:The objective of the study was to examine the characteristics of spontaneous bacterial peritonitis (SBP) caused by streptococci, in particular viridans group streptococci (VGS), and to investigate a potential association between the long-term administration of norfloxacin and high-level resistance to fluoroq...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/00042737-200509000-00008
更新日期:2005-09-01 00:00:00
abstract::Primary biliary cirrhosis (PBC) is a chronic cholestatic liver disease. Frequently, it can slowly progress to cirrhosis and, finally, death. Liver transplantation is the only way to avoid this endpoint. For patients not accepted for liver transplantation, only symptomatic treatment remains. In advanced PBC, one of the...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/00042737-199908000-00021
更新日期:1999-08-01 00:00:00
abstract::Endoscopic sclerotherapy or ligation and/or drugs are the standard treatments for the prevention of variceal rebleeding. Failure of this treatment indicates the need for rescue transjugular intrahepatic portosystemic shunt (TIPS) implantation. The current practice to use endoscopic treatment as first-line and TIPS as ...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章,评审
doi:10.1097/00042737-200104000-00007
更新日期:2001-04-01 00:00:00
abstract::This leading article refers to the paper by Abdelrazeq AS, Owen C, Smith L, McAdam JG, Pearson HJ, Leveson SH. Nicorandil-associated para-stomal ulceration: case series Eur J Gastroenterol Hepatol 2006; 18:1293-1295. We apologise to all concerned for the dissociation between the two papers, which was due to an adminis...
journal_title:European journal of gastroenterology & hepatology
pub_type: 评论,杂志文章,评审
doi:10.1097/MEG.0b013e328010b184
更新日期:2007-05-01 00:00:00
abstract:OBJECTIVE:Colonic fibrosis causing stricture is a recently described complication in cystic fibrosis (CF). Studies have suggested that ultrasound evidence of bowel thickening predicts this complication and that it is prevalent among children receiving large doses of high-strength pancreatin preparations. We performed u...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/00042737-199902000-00020
更新日期:1999-02-01 00:00:00
abstract:OBJECTIVES:Hepatitis C virus (HCV) is the major cause of cryoglobulinemia. Direct-acting antivirals (DAAs) have markedly changed the therapeutic outcomes in the treatment of patients with HCV. We evaluate the efficacy, safety, immunological, and clinical response of different DAA regimens in HCV-cryoglobulinemia. PATI...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/MEG.0000000000001239
更新日期:2018-10-01 00:00:00
abstract:BACKGROUND:Although small bowel capsule endoscopy (SBCE) has developed an established role in Crohn's disease (CD), there is paucity of data on impact of SBCE on subsequent management. We investigated the clinical utility of SBCE in patients with suspected and established CD and inflammatory bowel disease unclassified ...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/MEG.0b013e32835ddb85
更新日期:2013-06-01 00:00:00
abstract::Autoimmune pancreatitis is a clinical entity with many different clinical and biological characteristics that make diagnosis difficult. Sensitive and specific pancreatic antibodies are still lacking to assess the diagnosis as is the availability of interpretable pathological specimens. However, suggestive features con...
journal_title:European journal of gastroenterology & hepatology
pub_type: 评论,杂志文章
doi:10.1097/00042737-200412000-00005
更新日期:2004-11-01 00:00:00
abstract:OBJECTIVES:Discrimination of biliary atresia (BA) from other causes of neonatal cholestasis (NC) is challenging. We aimed to analyze the clinicopathological findings in cholestatic infants who were provisionally diagnosed with BA and then excluded by intraoperative cholangiography compared with those with a definitive ...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/MEG.0000000000000198
更新日期:2014-11-01 00:00:00
abstract:BACKGROUND:Correa's hypothesis proposes that gastric carcinogenesis is due to atrophic gastritis and hypochlorhydria which permit gastric bacterial colonization, the reduction of dietary nitrates to nitrites and the formation of potentially carcinogenic N-nitroso compounds (NOCs). OBJECTIVE:To test the hypothesis that...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/00042737-200012020-00006
更新日期:2000-02-01 00:00:00
abstract:BACKGROUND:Diabetes mellitus can occur after acute pancreatitis (AP), but there are currently no tools for evaluating the risk of developing diabetes after an attack of AP. The aim of the study was to develop a nomogram for prediction of new-onset diabetes mellitus after the first attack of AP. PATIENTS AND METHODS:We...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章
doi:10.1097/MEG.0000000000001307
更新日期:2019-03-01 00:00:00
abstract::The elucidation of the pathogenesis of faecal incontinence in patients with advanced diabetes mellitus has progressed during the last 15 years. In contrast to earlier concepts which promoted the concept that high stool volumes overwhelm normal continence mechanisms, recent studies indicate that the vast majority of di...
journal_title:European journal of gastroenterology & hepatology
pub_type: 杂志文章,评审
doi:
更新日期:1995-08-01 00:00:00