Abstract:
BACKGROUND & AIMS:Hepatic steatosis is frequent in chronic hepatitis C. Several mechanisms might be implicated, including metabolic cofactors and direct viral effects on intracellular lipid pathways. In a transgenic mouse model, hepatitis C virus (HCV) was shown to inhibit microsomal triglyceride transfer protein (MTP) activity, which is essential for hepatic lipoprotein assembly and secretion. No data are available on liver MTP activity in HCV-infected patients. We therefore investigated liver MTP gene expression and its lipid transfer activity in untreated cases infected with the major HCV genotypes showing variable degrees of hepatic steatosis. METHODS:MTP messenger RNA (mRNA) levels were measured by real-time polymerase chain reaction, and MTP activity was assessed by fluorescent assay in liver biopsy specimens of 58 HCV-positive patients. A set of metabolic and serum lipid markers was also measured at the time of liver biopsies. RESULTS:MTP mRNA levels showed a statistically significant (P = .001) inverse correlation with the degree of steatosis, independently of the HCV genotype. MTP mRNA levels also had an inverse correlation with serum insulin (P = .0002), homeostasis model assessment-insulin resistance (HOMA-IR) (P = .005), and body mass index (P = .02) in patients with HCV-1 and HCV-2 and with serum HCV-RNA (P = .02) in HCV-3 patients. Liver MTP-specific activity was significantly reduced in HCV-3 patients compared with those with other HCV genotypes (P = .004) and correlated with reduced serum cholesterol, apo B, and low-density lipoproteins. CONCLUSIONS:MTP may play a central role in HCV-related steatosis, being modulated by different genotype-specific mechanisms, mainly hyperinsulinemia in non-HCV-3 patients, and more profound and direct virus-related effects in HCV-3-infected individuals.
journal_name
Gastroenterologyjournal_title
Gastroenterologyauthors
Mirandola S,Realdon S,Iqbal J,Gerotto M,Dal Pero F,Bortoletto G,Marcolongo M,Vario A,Datz C,Hussain MM,Alberti Adoi
10.1053/j.gastro.2006.02.035subject
Has Abstractpub_date
2006-05-01 00:00:00pages
1661-9issue
6eissn
0016-5085issn
1528-0012pii
S0016-5085(06)00391-Xjournal_volume
130pub_type
杂志文章相关文献
GASTROENTEROLOGY文献大全abstract:BACKGROUND & AIMS:Persons infected with Helicobacter pylori show an enhanced meal-stimulated gastrin release compared with uninfected controls. The aim of this study was to determine in animal models whether this gastrin release could be related to chronic gastric inflammation, elevated luminal ammonia level, or a comb...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/gast.1996.v110.pm8608890
更新日期:1996-03-01 00:00:00
abstract::This report defines criteria and reviews the epidemiology, pathophysiology, and management of common anorectal disorders: fecal incontinence (FI), functional anorectal pain and functional defecation disorders. FI is defined as the recurrent uncontrolled passage of fecal material for at least 3 months. The clinical fea...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2016.02.009
更新日期:2016-03-25 00:00:00
abstract:BACKGROUND & AIMS:Intestinal myofibroblasts are known to respond to inflammatory signals and may play a role in Crohn's disease-associated fibrosis. However, putative involvement by myofibroblasts in innate immune responses as part of intestinal host defense has not been characterized. We therefore analyzed expression ...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/s0016-5085(03)00403-7
更新日期:2003-06-01 00:00:00
abstract::The effects of a variety of substances influencing the initiation of cyclic motor events at the gastroduodenal junction were studied in conscious sheep. A significant and long-lasting decrease in the frequency of cyclic events from approximately 100 min to 30-40 min was elicited by the intraduodenal bulb administratio...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:
更新日期:1984-11-01 00:00:00
abstract::The human gastrointestinal tract contains distinct microbial communities that differ in composition and function based on their location, as well as age, sex, race/ethnicity, and diet of their host. We describe the bacterial taxa present in different locations of the GI tract, and their specific metabolic features. Th...
journal_title:Gastroenterology
pub_type: 杂志文章,评审
doi:10.1053/j.gastro.2014.01.052
更新日期:2014-05-01 00:00:00
abstract::Hyperplasia of the oxyntic enterochromaffinlike cells in response to long-lasting blockade of acid secretion is closely related to hypergastrinemia. In the present study, the effect of a specific gastrin receptor antagonist on proton pump inhibitor-induced changes on serum gastrin levels, mucosal height, as well as ga...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(92)91183-5
更新日期:1992-11-01 00:00:00
abstract:BACKGROUND & AIMS:Leptin production has been reported in the rat and in human stomach. It initiates intestinal nutrient absorption. In this study, we analyzed the effect of vagal stimulation on leptin release in the human stomach. METHODS:We studied the secretion of gastric acid and leptin on stimulation with insulin ...
journal_title:Gastroenterology
pub_type: 临床试验,杂志文章
doi:10.1053/gast.2002.31385
更新日期:2002-02-01 00:00:00
abstract::To study directly the functions of the cells that line the bile ducts inside the liver, we developed a new technique for isolating intrahepatic bile duct epithelial cells (IBDECs) from normal rat liver. Parenchymal and nonparenchymal cells were separated from whole liver by enzymatic digestion and mechanical disruptio...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(89)91695-8
更新日期:1989-11-01 00:00:00
abstract:BACKGROUND & AIMS:Serotonin transporter (SERT) plays a critical role in regulating serotonin (5-hydroxytryptamine [5-HT]) availability in the gut. Elevated 5-HT levels are associated with diarrheal conditions such as irritable bowel syndrome and enteric infections. Whether alteration in SERT activity contributes to the...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2009.09.002
更新日期:2009-12-01 00:00:00
abstract::A case of spontaneous rupture of a nonparasitic liver cyst, documented by serial computed tomography scans, is reported. The patient was closely followed clinically after the rupture of the cyst and was treated conservatively, without surgical intervention. No peritonitis developed. This unusual complication of nonpar...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(89)91438-8
更新日期:1989-07-01 00:00:00
abstract::Impaired metabolism of short-chain fatty acids, as well as a modified fecal ionogram, have been reported in ulcerative colitis. Fecal water samples from 62 patients with ulcerative colitis were analyzed in the present investigation to evaluate changes in SCFAs and lactic acid in relation to activity and severity of di...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/s0016-5085(88)80078-7
更新日期:1988-12-01 00:00:00
abstract::In the anesthetized ferret jejunum, the role of extrinsic and intrinsic nerves in the relationship between intestinal motor activity and transmural potential difference (PD) was studied. In the vagally intact ferret and after sympathetic blockade, spontaneous bursts of jejunal motor activity were associated with fluct...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(85)90644-4
更新日期:1985-12-01 00:00:00
abstract:BACKGROUND & AIMS:During hepatic fibrogenesis, the hepatic extracellular matrix changes to fibrillar collagens types I and III, and cirrhosis is believed to produce an irreversible scar. In this study, we investigated whether gene delivery of human matrix metalloproteinase-1, which degrades collagens types I and type I...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/gast.2003.50063
更新日期:2003-02-01 00:00:00
abstract:BACKGROUND & AIMS:Hepcidin is an antimicrobial peptide thought to be involved in the regulation of intestinal iron absorption. To further investigate its role in this process, we examined hepatic and duodenal gene expression in rats after the switch from a control diet to an iron-deficient diet. METHODS:Adult rats on ...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/gast.2002.35353
更新日期:2002-09-01 00:00:00
abstract:BACKGROUND & AIMS:Epithelial cells of the small intestine migrate to the tip of the villus at which they are shed. It is not understood how the intestinal barrier is maintained during this high cell turnover. The aim of this study was to use high-resolution in vivo light microscopy to investigate the mechanism of epith...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2005.06.015
更新日期:2005-09-01 00:00:00
abstract::To determine the frequency of a sustained remission and to assess the long-term prognosis of relapse and retreatment, 66 patients with severe hepatitis B surface antigen-negative chronic active hepatitis and prolonged follow-up after initial corticosteroid withdrawal (mean, 10 +/- 0.4 yr) were evaluated. Selection of ...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(87)90862-6
更新日期:1987-01-01 00:00:00
abstract:BACKGROUND & AIMS:During severe pancreatitis, interleukin (IL)-1beta and tumor necrosis factor (TNF)-alpha are produced in large quantities. The aim of this study was to determine whether either one plays a more dominant role and if their detrimental effects are additive. METHODS:Necrotizing pancreatitis was induced i...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/gast.1997.v113.pm9352880
更新日期:1997-11-01 00:00:00
abstract:BACKGROUND & AIMS:Guidelines recommend a 10-year interval between screening colonoscopies with negative results for average-risk individuals. However, many patients are examined at shorter intervals. We investigated outcomes of individuals with no polyps who had repeat colonoscopy in <10 years. METHODS:Data were colle...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2014.04.020
更新日期:2014-08-01 00:00:00
abstract::Characteristics of electrical activities, and the relationship between electrical and motor activities, were studied in circular and longitudinal (taenia) muscle of the human colon that was obtained from 21 individuals. Recordings were obtained with suction electrodes, the sucrose-gap method, and microelectrodes. The ...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(85)90513-x
更新日期:1985-02-01 00:00:00
abstract:BACKGROUND & AIMS:Gastroesophageal reflux typically occurs after meals. During dual gastric and esophageal pH monitoring, we observed that postprandial refluxate was often more acidic than the gastric contents. This study aimed to investigate this phenomenon. METHODS:Dual gastric and esophageal pH tracings were analyz...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/gast.2001.27997
更新日期:2001-10-01 00:00:00
abstract:BACKGROUND & AIMS:A previous 4-week trial of telbivudine in patients with chronic hepatitis B indicated marked antiviral effects with good tolerability, leading to the present 1-year phase 2b trial. METHODS:This randomized, double-blind, multicenter trial evaluated the efficacy and safety of telbivudine 400 or 600 mg/...
journal_title:Gastroenterology
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1016/j.gastro.2005.05.053
更新日期:2005-08-01 00:00:00
abstract::The histological and immunohistochemical characteristics of the liver in 44 children (28 boys, 16 girls) with extrahepatic biliary atresia at different stages of the clinical course were studied. Thirty-four wedge liver biopsy specimens taken during Kasai operations (25 specimens) and relaparotomy (9 specimens) and 20...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(92)90342-v
更新日期:1992-06-01 00:00:00
abstract::Aspartame [Nutrasweet, Equal (Searle Consumer Products, Chicago, Ill.)] is the methyl ester of the dipeptide aspartylphenylalanine (Asp-Phe). After hydrolysis of the ester bond in the intestinal lumen, the dipeptide is apparently absorbed and digested in the same manner as dipeptides derived from protein digestion. We...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(86)90697-9
更新日期:1986-10-01 00:00:00
abstract::We investigated the ability of isolated human colonic epithelial cells to express the common acute lymphoblastic leukemia antigen (CALLA), the transferrin receptor, and the 4F2 antigen in response to different types of stimuli. The expression of these markers was assessed by immunofluorescence using monoclonal antibod...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(89)90387-9
更新日期:1989-12-01 00:00:00
abstract::The study of cholesterol gallstone disease would be facilitated if the nucleation time of cholesterol crystals could be measured in duodenal bile and was correlated with nucleation occurring in vivo. Therefore, our aims were to determine (a) if nucleation time could be measured in duodenal bile, (b) the effect of bact...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(91)90480-9
更新日期:1991-07-01 00:00:00
abstract:BACKGROUND/AIMS:Approximately 50% of patients with functional dyspepsia have Helicobacter pylori infection; it remains controversial whether this infection causes chronic symptoms, but rigorously conducted therapeutic trials should establish whether H. pylori plays a role in functional dyspepsia. The aim here was to de...
journal_title:Gastroenterology
pub_type: 杂志文章,评审
doi:10.1016/0016-5085(94)90007-8
更新日期:1994-05-01 00:00:00
abstract::The effects of some newly developed tachykinin antagonists that are selective for the neurokinin (NK)-1 (L 668,169) or the NK-2 (MEN 10,207, L 659,877 and R 396) tachykinin receptor on the cholinergic and noncholinergic contraction and on the nonadrenergic noncholinergic relaxation produced by electrical field stimula...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(92)91787-5
更新日期:1992-01-01 00:00:00
abstract::Familial gastrointestinal stromal tumor (GIST) is a rare autosomal dominant genetic disorder associated with KIT germline mutations. In sporadic forms of the disease, somatic mutations target either KIT or PDGFRA genes. In a kindred in which 5 individuals had GIST, no germline mutation in KIT coding sequence has been ...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2003.10.079
更新日期:2004-01-01 00:00:00
abstract:BACKGROUND & AIMS:The NOD2 gene, which is strongly associated with susceptibility to Crohn's disease (CD) of the terminal ileum, interacts with bacterial lipopolysaccharide (LPS), inducing cellular activation. However, the mechanisms by which NOD2 mutations cause terminal ileitis are unknown, and NOD2 is expressed most...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/s0016-5085(03)00661-9
更新日期:2003-07-01 00:00:00
abstract:BACKGROUND & AIMS:Helicobacter pylori-negative idiopathic ulcers are increasingly recognized. The secular trend and long-term outcome of this condition are unknown. METHODS:We prospectively studied consecutive patients with bleeding gastroduodenal ulcers from January to December 2000. The incidence and etiology of ulc...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2005.03.026
更新日期:2005-06-01 00:00:00