Abstract：
:Because insulin resistance is inevitably associated with cardiovascular complications, there is a need to further investigate the potential involvement of oxidative stress and the cyclo-oxygenase (COX) pathway in the vascular modifications associated to this pathological context. Endothelial function was evaluated in control and fructose-fed rats (FFR) by i) in vitro study of endothelium-dependent and -independent relaxations of aortic rings, and ii) in vivo telemetric evaluation of pressor response to norepinephrine. After 9 weeks of diet, FFR displayed hypertriglyceridemia, hyperinsulinemia and exaggerated response to glucose overload. Aortic rings from control rats and FFR exhibited comparable endothelium-dependent relaxations to Ach. In the presence of indomethacin, relaxations were significantly reduced. FFR showed exaggerated pressor responses to norepinephrine that were abolished with indomethacin. Urinary nitrites/nitrates, 8-isoprostanes and thromboxane B2 excretion levels were markedly enhanced in FFR, whereas the plasma levels of 6-keto prostaglandin F1alpha were unchanged. In conclusion, fructose overload in rats induced hypertriglyceridemia and insulin resistance associated with an enhanced oxidative stress. This was associated with COX pathway dysregulation which could be one of the contributors to subsequent vascular dysfunction. Consequently, reduction of oxidative stress and regulation of the COX pathway could represent new potential therapeutic strategies to limit vascular dysfunction and subsequent cardiovascular complications associated with insulin resistance.
journal_name
Physiol Resjournal_title
Physiological researchauthors
Oudot A,Behr-Roussel D,Compagnie S,Caisey S,Le Coz O,Gorny D,Alexandre L,Giuliano Fsubject
Has Abstractpub_date
2009-01-01 00:00:00pages
499-509issue
4eissn
0862-8408issn
1802-9973pii
1583journal_volume
58pub_type
杂志文章abstract：:The lymphatic bioavailability (FL) of diazepam (DZ) and its major metabolite desmethyldiazepam (DDZ) was studied. DZ was administered in intravenous and intraduodenal boluses, and in intravenous infusion in three groups of rats with different total lipid (TL) content in the central lymph. The effect of a) different li...
journal_title：Physiological research
pub_type： 杂志文章
doi：
更新日期：1996-01-01 00:00:00
abstract：:The aging process is associated with a decline in mitochondrial functions. Mitochondria dysfunction is involved in initiation and progression of many health problems including neuromuscular, metabolic and cardiovascular diseases. It is well known that endurance exercise improves mitochondrial function, especially in t...
journal_title：Physiological research
pub_type： 杂志文章,评审
doi：10.33549/physiolres.933329
更新日期：2017-03-31 00:00:00
abstract：:No data are available about the effects of AT1 receptor antagonist losartan on the skeleton and there is also little information on the activity of an ACE inhibitor enalapril on bone metabolism. It is widely believed that the vasculature plays an important role in bone remodeling under normal and pathological conditio...
journal_title：Physiological research
pub_type： 杂志文章
doi：
更新日期：2001-01-01 00:00:00
abstract：:We investigated whether arginine vasopressin (AVP) has a central influence on the development of gastric mucosal lesions evoked by restraint-cold stress in rats. AVP and vasopressin V1 receptor antagonist were injected intracerebroventricularly (i.c.v.) and the rats were exposed to restraint-cold stress for five hours...
journal_title：Physiological research
pub_type： 杂志文章
doi：
更新日期：1999-01-01 00:00:00
abstract：:The most common etiology of non-syndromic monogenic obesity are mutations in gene for the Melanocortin-4 receptor (MC485) with variable prevalence in different countries (1.2-6.3 % of obese children). The aim of our study was 1) to search for MC4R mutations in obese children in Slovakia and compare their prevalence wi...
journal_title：Physiological research
pub_type： 杂志文章
doi：10.33549/physiolres.932968
更新日期：2015-01-01 00:00:00
abstract：:It has been suggested that thiazolidinediones (TZDs) ameliorate insulin resistance in muscle tissue by suppressing muscle lipid storage and the activity of novel protein kinase C (nPKC) isoforms. To test this hypothesis, we analyzed long-term metabolic effects of pioglitazone and the activation of nPKC-epsilon and -th...
journal_title：Physiological research
pub_type： 杂志文章
doi：10.33549/physiolres.931852
更新日期：2010-01-01 00:00:00
abstract：:The present study was performed to evaluate the role of neuronal nitric oxide synthase (nNOS)-derived nitric oxide (NO) during the developmental phase of hypertension in transgenic rats harboring the mouse Ren-2 renin gene (TGR). The first aim of the present study was to examine nNOS mRNA expression in the renal corte...
journal_title：Physiological research
pub_type： 杂志文章
doi：
更新日期：2002-01-01 00:00:00
abstract：:The overproduction of the free radical nitric oxide (NO) by activated immunocompetent cells with subsequent development of local oxidative stress is supposed to be one of the possible pathophysiological mechanisms of beta-cell damage during streptozotocin-induced diabetes. The blockade of increased NO production by si...
journal_title：Physiological research
pub_type： 杂志文章,评审
doi：
更新日期：2000-01-01 00:00:00
abstract：:Ischemic postconditioning and remote conditioning are potentially useful tools for protecting ischemic myocardium. This study tested the hypothesis that 2,3-dehydrosilybin (DHS), a flavonolignan component of Silybum marianum, could attenuate cardiomyocyte damage following hypoxia/reoxygenation by decreasing the genera...
journal_title：Physiological research
pub_type： 杂志文章
doi：10.33549/physiolres.932703
更新日期：2015-01-01 00:00:00
abstract：:Calcium cycling is a major determinant of cardiac function. S100A1 is the most abundant member of the calcium-binding S100 protein family in myocardial tissue. S100A1 interacts with a variety of calcium regulatory proteins such as SERCA2a, ryanodine receptors, L-type calcium channels and Na(+)/Ca(2+) exchangers, thus ...
journal_title：Physiological research
pub_type： 杂志文章,评审
doi：10.33549/physiolres.932712
更新日期：2014-01-01 00:00:00
abstract：:Mitochondrial dysfunction and oxidative stress participate in the development of diabetic complications, however, the mechanisms of their origin are not entirely clear. Coenzyme Q has an important function in mitochondrial bioenergetics and is also a powerful antioxidant. Coenzyme Q (CoQ) regenerates alpha-tocopherol ...
journal_title：Physiological research
pub_type： 杂志文章
doi：
更新日期：2000-01-01 00:00:00
abstract：:The objective of this study was to evaluate the effect of diet and 677 C-->T mutation of the methylenetetrahydrofolate reductase (MTHFR) gene on plasma homocyst(e)ine concentrations in an adolescent population (113 males, age: 14.2+/-2.4 years; 202 females, age: 14.9+/-2.1 years) from a region characterized by high ca...
journal_title：Physiological research
pub_type： 杂志文章
doi：
更新日期：2000-01-01 00:00:00
abstract：:The aim of present study was to investigate functional and physical alterations in membranes of heart mitochondria that are associated with remodeling of these organelles in acute phase of streptozotocin-induced diabetes and to elucidate the role of these changes in adaptation of the heart to acute streptozotocin-indu...
journal_title：Physiological research
pub_type： 杂志文章
doi：
更新日期：2008-01-01 00:00:00
abstract：:For better understanding of pathophysiological processes leading to increased retention of sodium as a consequence of hyperlipidemia, the properties of renal Na,K-ATPase, a key enzyme involved in maintaining sodium homeostasis in the organism, were studied. Enzyme kinetics of renal Na,K-ATPase were used for characteri...
journal_title：Physiological research
pub_type： 杂志文章
doi：10.33549/physiolres.932153
更新日期：2011-01-01 00:00:00
abstract：:The Prague Hereditary Hypercholesterolemic (PHHC) rat is a model of hypercholesterolemia. In previous experiments, it was found to be completely resistant to the development of atherosclerosis. It was assumed that the reverse transport of cholesterol (RCT) might be the reason for this resistance. In this study, RCT wa...
journal_title：Physiological research
pub_type： 杂志文章
doi：10.33549/physiolres.932680
更新日期：2014-01-01 00:00:00
abstract：:We investigated the effects of different weight loss protocols on leptin levels in obese females with the aim of addressing the leptin resistance which has been found to be an aggravating factor in obesity. Twenty-four obese females enrolled to one of three 12-week weight loss protocols: orlistat-induced weight loss (...
journal_title：Physiological research
pub_type： 临床试验,杂志文章
doi：
更新日期：2005-01-01 00:00:00
abstract：:In this work, we evaluated the effect of adaptation to heat on the fall of blood pressure (BP) induced by heat shock (HS) and the interrelation between nitric oxide (NO) and heat shock protein, HSP70. Experiments were carried out on Wistar rats. It was shown that HS resulted in a generalized and transient increase in ...
journal_title：Physiological research
pub_type： 杂志文章
doi：
更新日期：2000-01-01 00:00:00
abstract：:Parvalbumin (PV) is a calcium-binding protein that is expressed by numerous neuronal subpopulations in the central nervous system. Staining for PV was often used in neuroanatomical studies in the past. Recently, several studies have suggested that PV acts in neurons as a mobile endogenous calcium buffer that affects t...
journal_title：Physiological research
pub_type： 杂志文章
doi：
更新日期：2009-01-01 00:00:00
abstract：:Eukaryotic cytochrome c oxidase (CcO), the terminal component of the mitochondrial electron transport chain is a heterooligomeric complex that belongs to the superfamily of heme-copper containing terminal oxidases. The enzyme, composed of both mitochondrially and nuclear encoded subunits, is embedded in the inner mito...
journal_title：Physiological research
pub_type： 杂志文章,评审
doi：
更新日期：2006-01-01 00:00:00
abstract：:Parenteral nutrition-associated liver disease (PNALD) is a severe complication in patients completely dependent on parenteral nutrition (PN). The gold diagnostic standard, liver biopsy, is associated with significant health risk and therefore its use is limited. MicroRNAs (miRNAs) are small non-coding regulatory RNA m...
journal_title：Physiological research
pub_type： 杂志文章
doi：10.33549/physiolres.934103
更新日期：2019-08-29 00:00:00
abstract：:A new concept of cardioprotection based on the exploitation of endogenous mechanisms is known as ischemic preconditioning (IPC). It has been hypothesized that substances released during brief ischemic stress (e.g. catecholamines) stimulate the receptors and trigger multiple cell signaling cascades. Opening of ATP-sens...
journal_title：Physiological research
pub_type： 杂志文章
doi：
更新日期：2002-01-01 00:00:00
abstract：:Pulse dye densitometry (PDD) enables the evaluation of hemodynamic state as well as liver function. A repeated examination, even after a short pause (or under stress condition), enables to follow safely the dynamics of liver pathology. From presented parameters we have evaluated as reliable the C5-clearance, an expres...
journal_title：Physiological research
pub_type： 临床试验,杂志文章
doi：
更新日期：2009-01-01 00:00:00
abstract：:Increased excitability of the spinal motor system has been observed after loud and unexpected acoustic stimuli (AS) preceding H-reflexes. The paradigm has been proposed as an electrophysiological marker of reticulospinal tract activity in humans. The brainstem reticular formation also maintains dense anatomical interc...
journal_title：Physiological research
pub_type： 杂志文章,随机对照试验
doi：10.33549/physiolres.932182
更新日期：2011-01-01 00:00:00
abstract：:Hyperbaric oxygen (HBO) therapy, i.e. breathing pure oxygen under increased environmental pressures serves as a treatment for diverse medical conditions. However, elevated oxygen concentration can be detrimental to central nervous system or lungs. Our study aimed to evaluate the effects of repeated exposure to HBO on ...
journal_title：Physiological research
pub_type： 杂志文章
doi：10.33549/physiolres.934046
更新日期：2018-12-31 00:00:00
abstract：:Obstructive sleep apnea (OSA) has been demonstrated to be implicated in disorder of insulin secretion and diabetes mellitus. In this study, we aimed to evaluate the protective role of tempol, a powerful antioxidant, in chronic intermittent hypoxia (IH)-induced pancreatic injury. The rat model of OSA was established by...
journal_title：Physiological research
pub_type： 杂志文章
doi：10.33549/physiolres.934010
更新日期：2019-06-30 00:00:00
abstract：:Glucose tolerance, insulin binding to erythrocytes, insulinaemia, plasma total cholesterol, plasma triglycerides, weight of fat pads, food consumption and body weight changes were studied in genetically hypertensive lean Koletsky rats. Long-term treatment with dopaminergic agonist terguride (0.2 mg/kg/day) normalized ...
journal_title：Physiological research
pub_type： 杂志文章
doi：
更新日期：1997-01-01 00:00:00
abstract：:Insulin is known to increase blood flow in parallel to glucose uptake in skeletal muscle. However, it is not known if an increase in blood flow by itself is associated with an increase in glucose uptake in the absence of hyperinsulinemia. To investigate further this matter, the effect of increased blood flow on forear...
journal_title：Physiological research
pub_type： 杂志文章
doi：
更新日期：1999-01-01 00:00:00
abstract：:Considerable evidence demonstrates that phenotypic switching of vascular smooth muscle cells (VSMCs) is influenced by aging and hypertension. During phenotypic switching, VSMCs undergo a switch to a proliferative and migratory phenotype, with this switch being a common pathology in cardiovascular diseases. The aim of ...
journal_title：Physiological research
pub_type： 杂志文章
doi：10.33549/physiolres.933779
更新日期：2018-08-16 00:00:00
abstract：:In this study we analyzed the effects of melatonin (Mel, 1 mg/kg ip) on behavioral changes as well as cell and oxidative damage prompted by bilaterally olfactory bulbectomy. Olfactory bulbectomy caused an increase in lipid peroxidation products and caspase-3, whereas it prompted a decrease of reduced glutathione (GSH)...
journal_title：Physiological research
pub_type： 杂志文章
doi：10.33549/physiolres.931684
更新日期：2010-01-01 00:00:00
abstract：:Cardiac resynchronization therapy (CRT) has proven efficacious in reducing or even eliminating cardiac dyssynchrony and thus improving heart failure symptoms. However, quantification of mechanical dyssynchrony is still difficult and identification of CRT candidates is currently based just on the morphology and width o...
journal_title：Physiological research
pub_type： 杂志文章
doi：10.33549/physiolres.933805
更新日期：2017-12-30 00:00:00
