Abstract:
:Based on in vitro experiments measuring daily secretion rates in the culture media of rat hepatocytes and in vivo experiments using pulse labeling of intracellular precursors, the present study examines the ontogenic expression of the polymeric immunoglobulin receptor and secretory component by hepatocytes during growth. Our data indicate that hepatocytes from infant and suckling rats (day 5, 15) cultured in serum-free and hormone-free conditions only secreted trace amounts of secretory component. Beginning on day 20, basal secretion rate showed a marked upsurge with a 10-fold increase by day 35. The addition of dexamethasone (10(-7) mol/L) to the culture media enhanced by 2.5-fold the basal secretion of secretory component by hepatocytes from 20-, 25-, and 35-day-old rats, while addition of insulin to the media had no effect. The response to dexamethasone was dose-dependent (10(-5), 10(-6), 10(-7) mol/L) and specific. In vivo pulse labeling of receptor precursors in hepatocytes from 40-day-old rats allowed the identification of three intracellular forms: a 105-kilodalton peptide and a 116-120-kilodalton mature doublet. In 13-day-old rats, three immature precursors were detected: a 105-kilodalton peptide and a high molecular weight doublet of 185-190 kilodaltons. Sucklings (13 days) treated with corticosterone showed a pattern of precursors similar to controls. These findings support the following conclusions: (a) hepatocytes from infant and suckling rats synthesize and process immature receptor precursors whose expression is unaffected by corticosterone treatment, and (b) active secretion of secretory component is initiated at weaning independently from humoral and hormonal factors while the magnitude of its production by the liver is under the control of glucocorticoids.
journal_name
Gastroenterologyjournal_title
Gastroenterologyauthors
Buts JP,Vaerman JP,Lescoat Gdoi
10.1016/0016-5085(92)90181-wkeywords:
subject
Has Abstractpub_date
1992-03-01 00:00:00pages
949-55issue
3eissn
0016-5085issn
1528-0012pii
0016-5085(92)90181-Wjournal_volume
102pub_type
杂志文章相关文献
GASTROENTEROLOGY文献大全abstract:BACKGROUND & AIMS:Linaclotide is a minimally absorbed peptide agonist of the guanylate cyclase-C receptor that stimulates intestinal fluid secretion and transit and reduces pain in animal models. We assessed the safety and efficacy of a range of linaclotide doses in patients with chronic constipation. METHODS:We perfo...
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.2009.12.050
更新日期:2010-03-01 00:00:00
abstract::Two Crohn's disease tissue-specific proteins are identified and purified several thousand-fold from crude tissue extracts by different chromatographic procedures. The two proteins migrate in sodium dodecyl sulfate-polyacrylamide gel electrophoresis as 200-210-kilodalton and 150-160-kilodalton species. They are glycopr...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(86)90564-0
更新日期:1986-08-01 00:00:00
abstract:BACKGROUND & AIMS:There is no clear and point for the response to treatment of gastrointestinal human cytomegalovirus (HCMV) disease. HCMV-DNA quantitation on gastrointestinal biopsy specimens has proven its value for the diagnosis of gastrointestinal HCMV disease in patients with acquired immunodeficiency syndrome (AI...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/gast.1996.v111.pm8690210
更新日期:1996-08-01 00:00:00
abstract:BACKGROUND & AIMS:Barrett's esophagus-associated high-grade dysplasia is commonly treated by endoscopy. However, most guidelines offer no recommendations for endoscopic treatment of mucosal adenocarcinoma of the esophagus (mAC). We investigated the efficacy and safety of endoscopic resection in a large series of patien...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2013.11.006
更新日期:2014-03-01 00:00:00
abstract:BACKGROUND AND AIMS:The mammalian intestinal epithelium self-renews rapidly and homeostasis is preserved via tightly controlled mechanisms. Long noncoding RNAs transcribed from ultraconserved regions (T-UCRs) control different cell functions, but little is known about their role in maintaining the integrity of the inte...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2017.10.009
更新日期:2018-02-01 00:00:00
abstract::Five carboxyl-terminal fragments of secretin ranging in size from 6 to 21 amino acid residues were tested for pancreatic secretory activity in the rat. None of the fragments displayed activity when given alone but each displayed significant activity when given after secretin. This apparent activity was shown to be the...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:
更新日期:1978-12-01 00:00:00
abstract::Hepatocellular carcinoma often affects blacks at an early age. The purpose of this study was to ascertain if the association between chronic hepatitis B virus infection and hepatocellular carcinoma is the same in young and older black patients. Serum markers of hepatitis B infection were measured by radioimmunoassay i...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(88)90434-9
更新日期:1988-02-01 00:00:00
abstract:BACKGROUND & AIMS:Standardized instruments are needed to assess the activity of eosinophilic esophagitis (EoE) and to provide end points for clinical trials and observational studies. We aimed to develop and validate a patient-reported outcome (PRO) instrument and score, based on items that could account for variations...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2014.08.028
更新日期:2014-12-01 00:00:00
abstract:BACKGROUND/AIMS:The role of cholecystokinin (CCK) in the regulation of gastric acid secretion is still controversial. This study examined the effect of the CCK-A receptor antagonist loxiglumide (lox) on gastrin- or CCK-induced gastric acid secretion and meal-stimulated plasma gastrin levels in a placebo-controlled stud...
journal_title:Gastroenterology
pub_type: 临床试验,杂志文章
doi:10.1016/0016-5085(94)90799-4
更新日期:1994-12-01 00:00:00
abstract:BACKGROUND & AIMS:De novo lipogenesis is believed to be involved in oncogenesis. We investigated the role of aberrant lipid biosynthesis in the pathogenesis of human hepatocellular carcinoma (HCC). METHODS:We evaluated expression of enzymes that regulate lipogenesis in human normal liver tissues and HCC and surroundin...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2010.12.006
更新日期:2011-03-01 00:00:00
abstract:BACKGROUND & AIMS:Elevated hepatic iron concentration may affect the response to antiviral therapy in chronic hepatitis C. This study explored the contribution of genetic hemochromatosis to iron accumulation in chronic hepatitis C. METHODS:HFE mutations (C282Y and H63D) were assessed in 184 patients with chronic hepat...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/s0016-5085(99)70236-2
更新日期:1999-01-01 00:00:00
abstract::Glycine protects renal tubule cells from cell death during adenosine triphosphate (ATP) depletion. Although the liver plays a key role in glycine metabolism, information is lacking regarding the effects of glycine on lethal hepatocellular injury. Thus, the aim of this study was to determine the potential cytoprotectiv...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(92)90338-y
更新日期:1992-06-01 00:00:00
abstract::Medical and recreational cannabis use has increased dramatically over the last decade, resulting from mainstream cultural acceptance and legalization in several countries worldwide. Cannabis and its derivatives affect many gastrointestinal processes via the endocannabinoid system (ECS). The ECS influences gastrointest...
journal_title:Gastroenterology
pub_type: 杂志文章,评审
doi:10.1053/j.gastro.2020.03.087
更新日期:2020-07-01 00:00:00
abstract:BACKGROUND & AIMS:The cyclic adenosine monophosphate (cAMP) and Ca(2+) signaling pathways synergize to regulate many physiological functions. However, little is known about the mechanisms by which these pathways interact. We investigated the synergy between these signaling pathways in mouse pancreatic and salivary glan...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2013.03.047
更新日期:2013-07-01 00:00:00
abstract:BACKGROUND & AIMS:The incidence of Barrett's esophagus and esophageal adenocarcinoma has increased despite surveillance of patients with Barrett's esophagus. Limited data indicate that nonsteroidal anti-inflammatory drug (NSAID) and statin use reduce the risk for esophageal adenocarcinoma. We investigated whether NSAID...
journal_title:Gastroenterology
pub_type: 杂志文章,多中心研究
doi:10.1053/j.gastro.2011.08.036
更新日期:2011-12-01 00:00:00
abstract:BACKGROUND & AIMS:The revised Bethesda guidelines for Lynch syndrome recommend microsatellite instability (MSI) testing all colorectal cancers in patients diagnosed before age 50 years and colorectal cancers diagnosed in patients between ages 50 and 59 years with particular pathology features. Our aim was to identify p...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2007.04.044
更新日期:2007-07-01 00:00:00
abstract:BACKGROUND & AIMS:Although a significant amount of regenerating gene (REG) Ialpha protein is present not only in normal gastric mucosa but also in gastric cancer tissues, its pathophysiologic role in gastric cancer development remains unclear. We investigated REG Ialpha protein expression in early gastric cancers, and ...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2004.12.045
更新日期:2005-03-01 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:Hepatobiliary complications occur in inflammatory bowel disease and may be caused by the translocation of intestinal toxins from portal blood into bile through leaky hepatocyte tight junctions. The role of tight junctions in the pathogenesis of hepatobiliary complications in experimental inflammatory ...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/gast.1997.v113.pm9322530
更新日期:1997-10-01 00:00:00
abstract:BACKGROUND & AIMS:The aim of this study was to determine whether expression of hepatitis C virus proteins alters hepatic morphology or function in the absence of inflammation. METHODS:Transgenic C57BL/6 mice with liver-specific expression of RNA encoding the complete viral polyprotein (FL-N transgene) or viral structu...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/gast.2002.31001
更新日期:2002-02-01 00:00:00
abstract::Several single-nucleotide polymorphisms (SNPs) have been associated with colorectal cancer (CRC) susceptibility. Most CRCs arise from adenomas, and SNPs therefore might affect predisposition to CRC by increasing adenoma risk. We found that 8 of 18 known CRC-associated SNPs (rs10936599, rs6983267, rs10795668, rs3802842...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2012.09.016
更新日期:2013-01-01 00:00:00
abstract::Previous investigations demonstrated that S-adenosyl-L-methionine suppresses the cholestatic effect of ethynylestradiol and reduces the irreversible binding of the estrogen to rat liver microsomes, probably favoring ethynylestradiol transformation into its methyl-derivatives. Since it is not known whether SAMe also pr...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:
更新日期:1981-01-01 00:00:00
abstract:BACKGROUND & AIMS:Hydrophobic bile acids have been implicated in the pathogenesis of cholestatic liver injury. The hypothesis that hydrophobic bile acid toxicity is mediated by oxidant stress in an in vivo rat model was tested in this study. METHODS:A dose-response study of bolus intravenous (i.v.) taurochenodeoxychol...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/s0016-5085(98)70644-4
更新日期:1998-01-01 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:Current information concerning endothelin in cirrhosis is conflicting. Plasma endothelin concentration has been found to be increased in some studies and normal or reduced in others. The present study was aimed to investigate the plasma levels of endothelin in cirrhosis and to assess whether it is involved i...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(93)90360-o
更新日期:1993-05-01 00:00:00
abstract:BACKGROUND & AIMS:Mutational inactivation of adenomatous polyposis coli (APC) is an early event in colorectal cancer (CRC) progression that affects the stability and increases the activity of β-catenin, a mediator of Wnt signaling. Progression of CRC also involves inactivation of signaling via transforming growth facto...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2011.11.026
更新日期:2012-03-01 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::Three structurally related peptides, ovine corticotropin-releasing factor, sauvagine, and urotensin I are selective mesenteric vasodilators in dogs. To assess the possible benefit of these peptides in nonocclusive mesenteric ischemia, they were compared with a nonselective vasodilator, sodium nitroprusside, in the ane...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1016/0016-5085(86)91122-4
更新日期:1986-03-01 00:00:00
abstract:BACKGROUND & AIMS:Human cervical cancer oncogene (HCCR-1) has appeared to act as a negative regulator of p53 and contributes to tumorigenesis of various organs including the colon. We identified the HCCR-1 binding protein deleted in polyposis 1 (DP1) and accessed the role of HCCR-1 and DP1 in colon tumorigenesis. METH...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2006.03.055
更新日期:2006-06-01 00:00:00
abstract:BACKGROUND & AIMS:A high-fat diet (HFD) can cause serious health problems, including alteration of gastrointestinal transit, the exact mechanism of which is not clear. Several microRNAs (miRNAs) are involved in energy homeostasis, lipid metabolism, and HFD-induced weight gain. We investigated the role of miRNAs in HFD-...
journal_title:Gastroenterology
pub_type: 杂志文章
doi:10.1053/j.gastro.2013.10.053
更新日期:2014-02-01 00:00:00