Abstract:
:Nitrogen load can be reduced by substituting dietary protein intake with keto or hydroxy analogues of amino acids. To investigate their intestinal absorption, human jejunal brush border membrane vesicles were used to measure uptake of L-leucine hydroxy analogue (L-LHA) and L-lactate. Uptake assays were performed under voltage-clamped conditions in the presence of valinomycin and K+ inside and outside. Both inward directed H(+)- and Na(+)-gradients stimulated uptake of both substrates. The H(+)-gradient was the major driving force and led to an increased rate of L-LHA or L-lactate transport. The proton ionophore FCCP abolished the H(+)-gradient-driven but not the Na(+)-gradient-driven uptakes of both substrates. The H(+)-gradient-driven uptake of both substrates was trans-stimulated by L-LHA, D-LHA, L-valine hydroxy analogue or L-lactate, respectively. In the presence of a Na(+)-gradient the uptake of tracer L-lactate was trans-stimulated only after preloading the vesicles with L-lactate but not by L-LHA. It can be concluded that the H(+)-gradient-driven transport of L- or D-hydroxy analogues of branched chain amino acids and L-lactate across the human intestinal brush border membrane is mediated by the same carrier.
journal_name
Eur J Clin Investjournal_title
European journal of clinical investigationauthors
Friedrich M,Murer H,Sterchi E,Berger EGdoi
10.1111/j.1365-2362.1992.tb01939.xkeywords:
subject
Has Abstractpub_date
1992-02-01 00:00:00pages
73-8issue
2eissn
0014-2972issn
1365-2362journal_volume
22pub_type
杂志文章abstract:BACKGROUND:The intestinal handling of dextran, an alpha-1,6-linked glucose polymer, is poor compared with starch, and some ingested dextran might therefore reach the lower small intestine. As luminal sugar up-regulates SGLT1 (sodium-dependent glucose transporter) locally, we report the effects of a dextran-enriched die...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1046/j.1365-2362.1998.00352.x
更新日期:1998-08-01 00:00:00
abstract:BACKGROUND:Angiotensin-converting enzyme inhibitors may affect reactive oxygen species in humans in vitro and in vivo. In the present study we evaluated whether angiotensin-converting enzyme inhibitors may affect NAD(P)H oxidase activity. MATERIALS AND METHODS:The production of reactive oxygen species was measured spe...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1046/j.1365-2362.2002.01064.x
更新日期:2002-10-01 00:00:00
abstract::Three different types of cardiovascular sequelae attributed to interferon therapy have been reported: arrhythmia, ischaemic heart disease and cardiomyopathy. We evaluated the left ventricular ejection fraction (LVEF) during alpha interferon therapy (3 MU administered subcutaneously three times a week for 6 months) in ...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1995.tb01528.x
更新日期:1995-01-01 00:00:00
abstract:BACKGROUND AND AIMS:Diabetes dramatically increases the risk of cardiovascular complications and mortality. Hydrogen sulphide plays an important role in reducing oxidative stress. Several studies demonstrated that hydrogen sulphide protects islet beta cells from oxidant stress damage and decreases apoptosis. The aim of...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/eci.13354
更新日期:2021-01-01 00:00:00
abstract:BACKGROUND:Acute ischaemic stroke (AIS) triggers both systemic and neurovascular inflammation, influencing poststroke recovery. In smokers with AIS, inflammation might be further upregulated, increasing ischaemia/reperfusion injury. Here, the predictive value of leucocyte and adhesion molecules levels on poststroke out...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/eci.12795
更新日期:2017-10-01 00:00:00
abstract:BACKGROUND: Cirrhotic patients are at considerable risk for bacterial infections, possibly through increased intestinal permeability and bacterial overgrowth. Proton pump inhibitors (PPIs) may increase infection risk. We aimed to explore the potential association between PPI use and bacterial infection risk in cirrhot...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.2011.02643.x
更新日期:2012-07-01 00:00:00
abstract:OBJECTIVE:To investigate alterations in endothelial nitric oxide synthase and inducible nitric oxide synthase mRNA expressions and nitric oxide release in the myocardium during ischaemia/reperfusion and determine whether these changes are ischaemic and/or reperfusion dependent. MATERIALS AND METHODS:Isolated rat heart...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.2005.01553.x
更新日期:2005-09-01 00:00:00
abstract:BACKGROUND:C-reactive protein (CRP) is a well-documented predictor of cardiovascular diseases and mortality. We aimed to better understand the distribution and determinants of CRP in the population. MATERIALS AND METHODS:Study participants were men and women aged 40-79 in the UK-based EPIC-Norfolk population-based coh...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/eci.12116
更新日期:2013-09-01 00:00:00
abstract::The cellular mechanisms controlling adaptive intestinal mucosal hypo- and hyperplasia are poorly understood but changes in tissue polyamine levels and in the activity of the key enzymes controlling their synthesis (ornithine decarboxylase: ODC) and degradation (diamine oxidase: DAO) have been implicated. Therefore, in...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1987.tb01130.x
更新日期:1987-10-01 00:00:00
abstract:BACKGROUND:Pseudoxanthoma elasticum (PXE), a rare heritable disorder caused by mutations of the ABCC6 gene, is characterized by fragmentation and mineralization of elastic fibres. We determined the extent of degradation of elastin by measuring and comparing the amount of desmosines in plasma and urine of PXE patients, ...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.2004.01306.x
更新日期:2004-02-01 00:00:00
abstract::Primary biliary cirrhosis and primary sclerosing cholangitis are well recognized chronic cholestatic liver diseases that are considered to have an autoimmune basis. Recent progress in the study of autoimmune liver diseases has improved the recognition and characterization of these conditions. An important component of...
journal_title:European journal of clinical investigation
pub_type: 杂志文章,评审
doi:10.1046/j.1365-2362.2001.00765.x
更新日期:2001-01-01 00:00:00
abstract:BACKGROUND:Recent data suggest that the mammalian target of rapamycin (mTOR) is involved in the regulation of growth of neoplastic cells in chronic myeloid leukaemia (CML). PATIENTS AND METHODS:We treated six patients with imatinib-resistant CML in haematological relapse (leukocytes > 20,000 microL(-1)) with rapamycin...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.2007.01892.x
更新日期:2008-01-01 00:00:00
abstract:AIMS:Obesity, diabetes and cardiovascular disease are associated with COVID-19 risk and severity. Because epicardial adipose tissue (EAT) expresses ACE2, we wanted to identify the main factors associated with ACE2 levels and its cleavage enzyme, ADAM17, in epicardial fat. MATERIALS AND METHODS:Epicardial and subcutane...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/eci.13463
更新日期:2020-11-29 00:00:00
abstract::Antibodies against prostaglandins (PG)F2alpha, E1 and E2 were obtained inrabbits immunized with respectively PG F2alpha, PG E1 and PG E2 conjugated to bovine serum albumin by carbodiimide. A radioimmunoassay capable of measuring 7 pg of PG Falpha, 2 pg of PG E2 and 14 pg of PG E1 in human peripheral plasma is describe...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1975.tb00459.x
更新日期:1975-07-29 00:00:00
abstract:BACKGROUND:We recently reported high high-density lipoprotein (HDL) cholesterol as a predictor of recurrent risk in a subgroup of postinfarction patients defined by hypercholesterolemia and high C-reactive protein (CRP) levels. We investigated whether a similar high-risk subgroup might exist for incident cardiovascular...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.2010.02287.x
更新日期:2010-06-01 00:00:00
abstract:BACKGROUND:Increasing evidence indicates that nonalcoholic fatty liver disease (NAFLD) is linked to an increased risk of extra-hepatic conditions. However, it is currently uncertain whether NAFLD is associated with the risk of gastroesophageal reflux disease (GERD). We performed a systematic review and meta-analysis of...
journal_title:European journal of clinical investigation
pub_type: 杂志文章,meta分析
doi:10.1111/eci.13158
更新日期:2019-09-01 00:00:00
abstract::Immunoreactive parathyroid hormone (PTH) levels and nephrogenous cyclic adenosine monophosphate (cAMP) have been reported to be useful parameters in the diagnosis of hyperparathyroidism. Measurements in hyperparathyroid patients usually give values above the normal range when PTH is measured with a carboxyterminal rad...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1984.tb01128.x
更新日期:1984-06-01 00:00:00
abstract:BACKGROUND:Profilin-1 is a ubiquitous, actin-binding protein that plays an important role in the regulation of actin polymerization and cytoskeleton remodelling and contributes to vascular dysfunction. We conducted this study to investigate the association of serum profilin-1 levels with fatal and nonfatal CVE in a coh...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/eci.12839
更新日期:2017-12-01 00:00:00
abstract::Estimations of the prevalence of central nervous system involvement in patients with systemic lupus erythematosus (SLE) vary from 25 to 75%. In order to assess possible deficits in memory, attention, and/or reaction time, a battery of neuropsychological tests was administered to 15 patients with SLE and to two matched...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:
更新日期:1992-10-01 00:00:00
abstract:BACKGROUND:Parental history of type 2 diabetes (T2D) is associated with cardiometabolic risk. We aimed to investigate the associations of parental history of T2D with cardiometabolic biomarkers and to subsequently investigate to what extent these putative associations were explained by modifiable factors. MATERIALS AN...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.2012.02685.x
更新日期:2012-09-01 00:00:00
abstract:INTRODUCTION:Optimizing the approach to older adults with cancer is now a priority given the increasing frequency of new cancer diagnoses that are made in the older population. The comprehensive geriatric assessment (CGA) represents the gold-standard for (1) defining prognosis and ability to withstand cancer treatments...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/eci.13347
更新日期:2021-01-01 00:00:00
abstract:BACKGROUND:Given that role of magnesium in insulin secretion is uncertain, our objective was to determine whether oral supplementation with magnesium chloride (MgCl(2)) improves the ability of beta-cells to compensate for variations in insulin sensitivity in non-diabetic individuals with significant hypomagnesaemia. M...
journal_title:European journal of clinical investigation
pub_type: 杂志文章,随机对照试验
doi:10.1111/j.1365-2362.2010.02422.x
更新日期:2011-04-01 00:00:00
abstract::In controls and in patients suffering from congestive heart failure (CHF) the circulating levels of catecholamines, neuropeptide Y-like immunoreactivity (NPY-LI), vasoactive intestinal peptide-LI (VIP-LI), substance P-LI (SP-LI) and calcitonin generated peptide-LI (CGRP-LI) markers of sympathetic, parasympathetic and ...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1990.tb01796.x
更新日期:1990-02-01 00:00:00
abstract::Factors affecting erythrocyte K+ content and plasma electrolytes during light exercise were examined in 8 normal subjects and 27 patients with chronic obstructive lung disease. The patients were classified into bronchitis, emphysema and intermediate groups. Arterial blood was obtained during rest, after 2, 5, and 7 mi...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1975.tb00469.x
更新日期:1975-09-12 00:00:00
abstract:BACKGROUND:There is an ongoing debate on a potential protective role of habitual physical activity and passive heat therapy on the risk of COVID-19, a respiratory infectious disease that can manifest as severe pneumonia. To explore these putative roles, we evaluated the independent and joint associations of cardiorespi...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/eci.13490
更新日期:2021-01-10 00:00:00
abstract::The concentration in serum of cathodal trypsinogen has been studied in certain clinical and experimental situations. The concentration correlated with pancreatic amylase activity. Low levels were found in patients with malabsorption due to exocrine pancreatic insufficiency. The concentration rose after endoscopic retr...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1978.tb00868.x
更新日期:1978-12-01 00:00:00
abstract::Eur J Clin Invest 2012; 42 (6): 579-588 ABSTRACT: Glucose-based methods are currently gold standards for identifying individuals at risk of type 2 diabetes. Obviously, these methods only consider one of many pathologies of impaired glucose metabolism and they all suffer from a poor specificity as type 2 diabetes risk ...
journal_title:European journal of clinical investigation
pub_type: 杂志文章,评审
doi:10.1111/j.1365-2362.2012.02678.x
更新日期:2012-06-01 00:00:00
abstract:BACKGROUND:The Treating to New Targets (TNT) study has recently provided evidence that reduction in LDL-C levels below 2·6 mmol L⁻¹ lowers the risk of cerebrovascular events by an additional 20% to 25%, thereby confirming the value of statin therapy in preventing transient ischaemic attacks and stroke. Despite the prot...
journal_title:European journal of clinical investigation
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1111/j.1365-2362.2010.02387.x
更新日期:2011-02-01 00:00:00
abstract::Reduced glutathione (GSH) and activity of GSH related enzymes play a key role in defence against oxygen free radicals, whose production is, as known, raised in patients affected by diabetes mellitus, and at the same time they may contribute to the process of platelet aggregation. The purpose of this study was to evalu...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1995.tb01983.x
更新日期:1995-09-01 00:00:00
abstract::Activities of urea cycle enzymes were measured in the liver of starved rats 12 and 48 h after bilateral nephrectomy. Control experiments (sham-operated, starved rats) revealed that the activities of only two enzymes of the cycle are altered in the uraemic state: argininosuccinic acid synthetase (EC 6.3.4.5.), which is...
journal_title:European journal of clinical investigation
pub_type: 杂志文章
doi:10.1111/j.1365-2362.1975.tb00423.x
更新日期:1975-02-01 00:00:00