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Showing 1-30 of 41 results for "H6891" within Papers
A M Jenner et al.
Neuroscience, 169(1), 109-115 (2010-04-27)
Despite apolipoprotein E's important role in cholesterol transport and metabolism in the brain as well as its influence on Alzheimer's disease, the impact of the human APOE genotype on cholesterol metabolism in brain has not been fully examined. This study
Lucia Trevisi et al.
Journal of vascular research, 47(3), 241-251 (2009-11-07)
The atherogenic potential of oxidized low-density lipoproteins (oxLDL) has been correlated to their 7beta-hydroxycholesterol (7betaOHC) content; oxLDLs have a dual effect on endothelial cell viability, inducing apoptosis or proliferation depending on the concentration. Considering that 7betaOHC is apoptotic for endothelial
Tijana Mitić et al.
Biochimie, 95(3), 548-555 (2012-09-04)
The atherogenic 7-oxysterols, 7-ketocholesterol (7-KC) and 7β-hydroxycholesterol (7βOHC), can directly impair arterial function. Inter-conversion of 7-KC and 7βOHC has recently been shown as a novel role for the glucocorticoid-metabolizing enzyme 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1). Since this enzyme is expressed
Mun'delanji C Vestergaard et al.
Biochimica et biophysica acta, 1808(9), 2245-2251 (2011-05-24)
The effect of temperature change(s) on the dynamics of giant unilamellar vesicles containing oxidized and non-oxidized cholesterol was investigated and characterized. We have demonstrated that (i) major cholesterol auto-oxidation products, 7β-hydroxycholesterol (7β) and 7-ketocholesterol (7keto), rendered vesicles more responsive to
G Lizard et al.
Arteriosclerosis, thrombosis, and vascular biology, 19(5), 1190-1200 (1999-05-14)
Oxidized low density lipoproteins (LDLs) play a central role in atherosclerosis, and their toxicity is due, at least in part, to the formation of oxysterols that have been shown to induce apoptosis in various cell types. As 7beta-hydroxycholesterol and 7-ketocholesterol
Mahmoud M Mostafa et al.
The Journal of biological chemistry, 296, 100065-100065 (2020-11-14)
Ligand-activated glucocorticoid receptor (GR) elicits variable glucocorticoid-modulated transcriptomes in different cell types. However, some genes, including Krüppel-like factor 9 (KLF9), a putative transcriptional repressor, demonstrate conserved responses. We show that glucocorticoids induce KLF9 expression in the human airways in vivo and
Raymond C S Seet et al.
Free radical biology & medicine, 50(12), 1787-1793 (2011-03-23)
Cigarette smoking predisposes to the development of multiple diseases involving oxidative damage. We measured a range of oxidative damage biomarkers to understand which differ between smokers and nonsmokers and if the levels of these biomarkers change further during the act
Carlo I G Tuberoso et al.
Food chemistry, 199, 18-27 (2016-01-19)
Juices obtained from cold-pressed saffron (Crocus sativus L.) floral by-products were evaluated as a potential source of compounds with antioxidant and cytotoxic activities. Floral by-products were split in two batches for extraction 24 and 48h after flower harvesting, respectively. The
Wei Li et al.
Biochemical and biophysical research communications, 409(4), 711-716 (2011-05-31)
Endothelial dysfunction and cell death play an important role in pathogenesis of atherosclerosis. 7-Oxysterols, the major cytotoxic component found in oxidized low-density lipoprotein, are toxic to endothelial cells. However, the pathways and molecular mechanism involved in the process remain incompletely
Steve Catarino et al.
Acta ophthalmologica, 90(4), e255-e263 (2012-02-09)
This study aimed at elucidating the molecular mechanisms involved in the regulation of IL-8 production by several oxysterols in retinal pigment epithelium (RPE) cells. A human cell line from RPE (ARPE-19) was used to test the role of cholesterol and
Yongsheng Wang et al.
Natural product research, 24(16), 1518-1522 (2010-09-14)
In this study, cholest-5-en-3β,7β-diol and 3β-hydroxy-cholest-5-en-7-one were isolated from Oviductus Ranae by column chromatographies on Sephadex LH-20, octadecylsilyl (ODS) and pre high-performance liquid chromatography (HPLC). Their structures were elucidated on the basis of chemical and spectral analyses, including electrospray ionisation-mass
Bungo Shirouchi et al.
Cytotechnology, 72(1), 175-187 (2020-01-15)
Nuclear receptors, such as liver X receptors (LXRs) and sterol regulatory element-binding proteins (SREBPs), are key regulators of lipogenic genes, including fatty acid synthase (FASN). It has been reported that several oxycholesterols (OCs) act as LXR ligands; however, it is
Cinzia Mascia et al.
Free radical biology & medicine, 49(12), 2049-2057 (2010-10-07)
Cholesterol and its oxidation products, namely oxysterols, have very recently been shown to potentially interfere with homeostasis of the human digestive tract, by promoting and sustaining irreversible damage of the colonic epithelial layer. This report concerns the strong proinflammatory action
Jan de Weille et al.
Biochemical pharmacology, 86(1), 161-167 (2013-03-30)
Oxysterols possess anti-proliferative properties that may be used with much effect in the treatment of cancer. We have demonstrated previously that 7 beta-hydroxycholesterol (7b-HC) provokes both metabolic stress, as witnessed by AMPK activation, and changes in lipid raft composition in
Wei Li et al.
Free radical research, 43(11), 1072-1079 (2009-08-27)
Peripheral natural killer (NK) cells are reduced in patients with coronary artery disease and highly susceptible to apoptosis induced by oxidized lipids including 7beta-hydroxycholesterol (7betaOH) in vitro. The present study aimed to further explore the mechanisms behind 7betaOH-mediated cytotoxicity to
W T Wong et al.
Nutrition, metabolism, and cardiovascular diseases : NMCD, 21(3), 157-164 (2009-12-17)
Oxidized low-density lipoprotein (ox-LDL) causes atherosclerosis and endothelial dysfunction. No study up to the present date has examined the relative contribution of all the oxidized components in ox-LDL to inhibition on vascular function. Our aim was to investigate the effects
Amit Laskar et al.
Journal of cardiovascular pharmacology, 56(3), 263-267 (2010-06-24)
Dimethyl sulfoxide (DMSO) is a widely used vehicle for water-insoluble substances and exerts a wide range of pharmacologic effects including anti-inflammatory and free radical scavenging properties. Additionally, in an animal model, DMSO inhibited cholesterol-induced atherosclerosis. Despite such profound pharmacologic effects
Paola Gamba et al.
Aging cell, 10(3), 403-417 (2011-01-29)
All three cholesterol oxidation products implicated thus far in the pathogenesis of Alzheimer's disease, 7β-hydroxycholesterol, 24-hydroxycholesterol, and 27-hydroxycholesterol, markedly enhance the binding of amyloid-beta (Aβ) to human differentiated neuronal cell lines (SK-N-BE and NT-2) by up-regulating net expression and synthesis
Wei Li et al.
Free radical biology & medicine, 53(11), 2054-2061 (2012-09-19)
Oxysterol accumulation and p53 expression mainly in macrophages have been associated with cell death and necrotic core formation in human atheroma progression. Oxidative stress and lysosomal membrane permeabilization (LMP) in macrophages are important causes of macrophage apoptosis. However, it is
Xiaoyang Xu et al.
Journal of cellular and molecular medicine, 21(2), 364-374 (2016-09-16)
Statins, 3-hydroxyl-3-methylglutaryl coenzyme A reductase inhibitors, are the first-line medications prescribed for the prevention and treatment of coronary artery diseases. The efficacy of statins has been attributed not only to their systemic cholesterol-lowering actions but also to their pleiotropic effects
Luisa Tesoriere et al.
The British journal of nutrition, 114(3), 368-375 (2015-07-15)
Toxic oxysterols in a hypercholesterolaemia-relevant proportion cause suicidal death of human erythrocytes or eryptosis. This process proceeds through early production of reactive oxygen species (ROS), release of prostaglandin (PGE2) and opening of PGE2-dependent Ca channels, membrane phosphatidylserine (PS) externalisation, and
Zhongmei Tang et al.
Analytical chemistry, 82(18), 7706-7712 (2010-08-28)
Chemical derivatization is useful for improving the ionization characteristics of poorly or nonionizable analytes in liquid chromatography-mass spectrometry (LC-MS). Dansyl chloride has been widely used as a derivatizing reagent for fluorescence detection and for facilitating the MS detection of phenols
I Spyridopoulos et al.
Arteriosclerosis, thrombosis, and vascular biology, 21(3), 439-444 (2001-03-07)
Controversy exists about the net effect of alcohol on atherogenesis. A protective effect is assumed, especially from the tannins and phenolic compounds in red wine, owing to their inhibition of low density lipoprotein (LDL) oxidation. However, increased atherogenesis occurs in
Sau-Yeen Loke et al.
Journal of neurochemistry, 124(6), 770-781 (2013-01-09)
Oxysterols such as 7β-hydroxycholesterol (7β-HC) and 7-ketocholesterol (7-KC) have been linked to the pathophysiology of neurodegenerative diseases. This study was carried out to examine the effect of oxysterols on global gene expression in the rat prefrontal cortex (PFC). 7β-HC, 7-KC
Yzzam Hammoud et al.
Biochimie, 95(3), 568-577 (2012-09-11)
Prolonged exposure to oxidized low density lipoprotein (oxLDL) can alter various aspects of cell biology, including modification of vasomotor responses and downregulation of calcium channel proteins in aortic smooth muscle cells. However, the components of oxLDL responsible for these effects
Thomas Nury et al.
Biochimie, 153, 181-202 (2018-07-23)
The involvement of organelles in cell death is well established especially for endoplasmic reticulum, lysosomes and mitochondria. However, the role of the peroxisome is not well known, though peroxisomal dysfunction favors a rupture of redox equilibrium. To study the role
Andrea Civra et al.
The Journal of steroid biochemistry and molecular biology, 193, 105424-105424 (2019-07-16)
Oxysterols are cholesterol oxidation derivatives. Those containing an additional hydroxyl group on the side chain of the cholesterol molecule result from a physiological enzymatic synthesis and include the majority of oxysterols present in the circulation. Among these, 25-hydroxycholesterol (25OHC) and
Kévin Ragot et al.
Biochemical pharmacology, 86(1), 67-79 (2013-03-12)
There is some evidence that oxidized derivatives of cholesterol, 7-ketocholesterol (7KC) and 7β-hydroxycholesterol (7βOHC), are increased in the plasma of patients with neurodegenerative diseases associated with demyelinization of the central nervous system (CNS). It was therefore of interest to investigate
G Lizard et al.
FEBS letters, 419(2-3), 276-280 (1998-01-15)
The oxysterols, 7beta-hydroxycholesterol and 7-ketocholesterol, are involved in the cytotoxicity of oxidized LDL. To elucidate their molecular mechanisms, the human promonocytic leukemia cells U937 and U4 were used. U4 cells overexpressing Bcl-2 were obtained by transfection of U937 cells. 7Beta-hydroxycholesterol
Morten Blaabjerg et al.
Ugeskrift for laeger, 175(5), 285-286 (2013-02-02)
Cerebrotendinous xanthomatosis (CTX) is a rare, but treatable lipid storage disorder caused by mutation in the CYP27A1 gene. The disorder results in deposition of cholestanol in various tissues. The classical CTX phenotype includes diarrhoea, juvenile cataract, xanthoma and progressive neurological
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