Abstract：
:Although ethanol has been reported to inhibit intestinal amino acid absorption and peptide hydrolysis by the brush border membrane (BBM) peptidases, its effect on other events of protein absorption (such as peptide hydrolysis by cytosol peptidases, absorption of peptides across the BBM, and translocation of amino acids across the basolaterial membrane) has not yet been reported. To obtain a better understanding of the overall effect of ethanol on intestinal protein absorption, in the present study we have investigated the influence of ethanol on the cytosol peptidases. In order to examine the activity of these enzymes, without the influence of brush border digestion and translocation of peptides, the present study was carried out in vitro using a preparation of cytosol peptidases. Results show that exposure of the enzymes to 1-5% (w/v) ethanol caused a dose-dependent inhibition of hydrolysis of L-leucylglycine (Leu-Gly), glycyl-L-tyrosine (Gly-Tyr), and L-phenylalanylglycine (Phe-Gly) by the cytosol peptidases. These inhibitions were completely reversible. Kinetic studies indicated that ethanol depressed the hydrolysis of Leu-Gly and Gly-Tyr by a mixed type of inhibition, in which the Vmax decreased and the Km increased. In the hydrolysis of Phe-Gly, two enzymes were involved, and ethanol depressed the Vmax of both, without affecting their Km. These findings suggest that ethanol alters only the catalytic center of both enzymes involved in the hydrolysis of Phe-Gly and alters both the catalytic center and the substrate binding site of the enzymes involved in the hydrolysis of Leu-Gly and Gly-Tyr. The results of this study together with those of our previous investigation on BBM peptidases indicate that ethanol interferes with the intestinal hydrolysis of peptides and, therefore, probably with the absorption of protein.
journal_name
Dig Dis Scijournal_title
Digestive diseases and sciencesauthors
Dinda PK,Beck ITdoi
10.1007/BF01296861subject
Has Abstractpub_date
1984-01-01 00:00:00pages
46-55issue
1eissn
0163-2116issn
1573-2568journal_volume
29pub_type
杂志文章abstract：INTRODUCTION:Assessment of whole gut transit, by radio-opaque markers or scintigraphy, is used to evaluate patients with constipation for slow gastrointestinal transit. Wireless capsule motility, using the SmartPill GI monitoring system, samples and transmits intraluminal pH, pressure, and temperature data from a capsu...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-009-0899-9
更新日期：2009-10-01 00:00:00
abstract：:Gastroenterologists are in a unique position to assist women with chronic gastrointestinal disorders in order to optimize their health prior to pregnancy. Women, whether with chronic conditions or not, and their infants are more likely to be healthy when pregnancies are planned. Achieving a planned pregnancy at the id...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章,评审
doi：10.1007/s10620-016-4383-z
更新日期：2017-01-01 00:00:00
abstract：BACKGROUND:We hypothesized that the severity of dextran sodium sulfate (DSS)-induced colitis could differ between DSS preparations of the same molecular weight, and that this difference may be affected by the sulfur content. To test this, we used three DSS preparations of similar molecular weights but with different su...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-011-1881-x
更新日期：2012-02-01 00:00:00
abstract：:In a subset of patients with gastroesophageal reflux disease (GERD), symptoms persist in spite of proton pump inhibitor (PPI) therapy. Endoscopic gastroplication (EG) was reported to provide a novel therapeutic option in GERD. To evaluate symptomatic and objective outcome of EG in PPI refractory GERD, consecutive GERD...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-005-1610-4
更新日期：2005-02-01 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：BACKGROUND:Regenerating islet-derived 3 (Reg3) is abnormally expressed in several human digestive system diseases, including chronic pancreatitis (CP) and pancreatic cancer (PC). AIM:The purpose of this study was to clarify the mechanism of the enhanced expression of Reg3 in inflammation-induced PC. METHODS:C57BL/6 m...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-015-3787-5
更新日期：2015-12-01 00:00:00
abstract：:An altered adaptive response of the pancreas and small intestine to nutritional stress has an adverse impact upon nutritional status in elderly humans or senescent rats. We evaluated the effects of a pancreatic extract nutritional supplement on intestinal mucosa adaptation in LPS-treated aged rats. Endotoxemic rats we...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1026614605555
更新日期：1998-10-01 00:00:00
abstract：BACKGROUND/AIM:Transarterial chemoembolization (TACE) is the recommended treatment for patients with Barcelona stage B hepatocellular carcinoma; however, community practice varies from these American Association for the Study of Liver Diseases guidelines. In this study, we sought to assess factors determining outcome a...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-014-3247-7
更新日期：2014-11-01 00:00:00
abstract：BACKGROUND:HIV progression is characterized by immune activation and microbial translocation from the gut. Short-chain fatty acids (SCFAs) are essential for gut homeostasis. Decreased intestinal SCFAs play a role in rapid HIV progression. AIMS:To compare the SCFA profile, intestinal microbiome, and intestinal mucosal ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-018-5428-2
更新日期：2019-07-01 00:00:00
abstract：:Consumption of high-fiber diets has been recommended prior to fecal blood testing to increase bleeding from polyps, cancer, and other lesions associated with mucosal erosion in the gastrointestinal tract. The effect of a high-fiber diet on fecal hemoglobin loss was examined in 17 healthy subjects during two dietary pe...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01297143
更新日期：1991-07-01 00:00:00
abstract：:This analysis evaluated the association between sleep disturbance and gastrointestinal symptoms in women with and without irritable bowel syndrome (IBS), and examined the role of psychological distress in this relationship. Women with IBS (N = 82) reported considerably higher levels of sleep disturbance compared to co...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1005581226265
更新日期：2000-05-01 00:00:00
abstract：BACKGROUND:Liver fibrosis can progress to cirrhosis, hepatocellular carcinoma, or liver failure. Unfortunately, the antifibrotic agents are limited. Thrombin activates hepatic stellate cells (HSCs). Therefore, we investigated the effects of a direct thrombin inhibitor, dabigatran, on liver fibrosis. METHODS:Adult male...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-018-5311-1
更新日期：2019-01-01 00:00:00
abstract：BACKGROUND AND AIMS:Avoidance of gluten is critical for individuals with celiac disease (CD), but there is also concern that "extreme vigilance" to a strict gluten-free diet may increase symptoms such as anxiety and fatigue, and therefore, lower quality of life (QOL). We examined the associations of QOL with energy lev...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-018-4936-4
更新日期：2018-06-01 00:00:00
abstract：:Recent data would limit indications for serum CEA measurement primarily to follow-up of resected colonic malignancy, yet physician attitude and usage patterns may lag far behind current findings. This discrepancy was investigated at our institution, where more than 1100 CEAs costing $71,000 are ordered each year. Of 4...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01296746
更新日期：1982-04-01 00:00:00
abstract：:Upper gastrointestinal endoscopy was performed for the evaluation of infectious esophagitis in 19 consecutive subjects evaluated prospectively before orthotopic liver transplantation (OLTx), in a separate group of 27 subjects post-OLTx, and in 21 subjects following orthotopic renal transplantation (ORTx). None of the ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01535788
更新日期：1988-09-01 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：BACKGROUND:MELD attempts to objectively predict the risk of mortality of patients with liver cirrhosis and is commonly used to prioritize organ allocation. Despite the usefulness of the MELD, updated metrics could further improve the accuracy of estimates of survival. AIMS:To assess and compare the prognostic ability ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-018-5360-5
更新日期：2019-02-01 00:00:00
abstract：BACKGROUND:Average-risk women aged 50-59 years have a lower incidence and mortality of colorectal cancer relative to age-matched men, calling into question the benefit of screening colonoscopy in this age group. AIMS:We aimed to determine whether FOBT is an effective initial screening test in 50-59-year-old women. ME...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-018-5156-7
更新日期：2018-10-01 00:00:00
abstract：:With the growing popularity of propofol mediated deep sedation for upper gastrointestinal (GI) endoscopic procedures, challenges are being felt and appreciated. Research suggests that management of the airway is anything but routine in this setting. Although many studies and meta-analyses have demonstrated the safety ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章,评审
doi：10.1007/s10620-016-4375-z
更新日期：2017-01-01 00:00:00
abstract：:To examine the differentiating parameters between cholesterol and pigment gallstones, we compared the nucleation times, concentrations of biliary lipid and protein, and the distribution of vesicular cholesterol in gallbladder bile of 16 patients with cholesterol, eight patients with black pigment gallstones, and nine ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF01296790
更新日期：1993-01-01 00:00:00
abstract：BACKGROUND:The presence of necrotic collection in acute necrotizing pancreatitis (ANP) at intra-abdominal sites other than the retroperitoneum has not been systematically studied. AIM:To investigate unusual sites of necrotic collections at computed tomography (CT) and to evaluate association with pancreatic necrosis a...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-020-06526-6
更新日期：2020-08-10 00:00:00
abstract：:The perception that chronic hepatitis C is an asymptomatic disease contrasts with many studies that show a strong association between chronic hepatitis C, hepatocellular cancer, and fatal liver disease. In order to resolve these issues, it is logical to directly evaluate the quality of life in patients with chronic he...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/BF02087879
更新日期：1996-12-01 00:00:00
abstract：:The intrarectal administration of trinitrobenzene sulfonic acid in rats induces ulcerative colitis, which results in histological alterations of colonic mucosa, severe modification of the cellular antioxidant defense system, and enhanced production of inflammatory eicosanoids. This study evaluated the influence of dif...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1026655311878
更新日期：1998-12-01 00:00:00
abstract：:To date, tests of small intestinal passive permeability have involved the ingestion of test molecules whose permeation is assessed indirectly by measuring their urinary recovery. Excretion ratios of marker molecules (eg, lactulose-to-mannitol excretion ratio, LMER) are useful clinically. Measurement of permeability ma...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1026679123148
更新日期：1999-02-01 00:00:00
abstract：BACKGROUND AND AIM:Simultaneous dilatation of the common bile duct and pancreatic duct, "double-duct sign" (DDS), is an ominous finding concerning for pancreaticobiliary malignancy. Little evidence exists to guide the initial evaluation and subsequent follow-up for patients with DDS in the absence of jaundice or focal ...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-014-3133-3
更新日期：2014-09-01 00:00:00
abstract：:Background/Aims Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) as a newly identified biological agent has shown promising antitumor effects in a wide range of cancers. However, gastric cancer cells are less sensitive than other cancer cells to TRAIL-induced apoptosis.Here, we combined TRAIL with borte...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1007/s10620-010-1191-8
更新日期：2010-12-01 00:00:00
abstract：:The indications for surgery on cavernous hemangiomas, the most common benign tumors of the liver, remain unclear. This study reviewed 43 patients with cavernous hemangioma of the liver who underwent hepatic resection from 1984 to 2000. Patients were divided into three groups based on the reasons for surgery. Group I c...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1023099529229
更新日期：2003-05-01 00:00:00
abstract：:The aim of this study was to compare the additive effect of rebamipide with that of teprenone in combination with dual therapy on H. pylori eradication. A total of 102 H. pylori-positive gastric ulcer patients were assigned at random to two groups; in addition to dual therapy (amoxicillin 500 mg thrice daily and lanso...
journal_title：Digestive diseases and sciences
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：1998-09-01 00:00:00
abstract：:Data about colonic mucosa transport of short-chain fatty acids in cirrhotic patients are still lacking. The aim of the present study was to compare the rectal mucosa transport of n-butyrate and its effect on transport of other electrolytes and endoluminal pH in normal subjects and in cirrhotic patients by using a rect...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1011982024849
更新日期：2001-10-01 00:00:00
abstract：:Fractional systemic bioavailability of orally administered drugs was found to be unexpectedly low in liver cirrhosis, even after surgical portal-systemic shunting. Fecal loss or intestinal first-pass elimination were assumed to explain the finding. In this paper we evaluated alternative pathophysiological interpretati...
journal_title：Digestive diseases and sciences
pub_type： 杂志文章
doi：10.1023/a:1005678627599
更新日期：2001-03-01 00:00:00
