Search results for "Cholesterol"
showing 10 items of 1211 documents
In vivo consequences of cholesterol-24S-hydroxylase (CYP46A1) inhibition by voriconazole on cholesterol homeostasis and function in the rat retina
2014
International audience; Cholesterol 24S-hydroxylase (CYP46A1) converts cholesterol into 24S-hydroxycholesterol in neurons and participates in cholesterol homeostasis in the central nervous system, including the retina. We aimed to evaluate the consequences of CYP46A1 inhibition by voriconazole on cholesterol homeostasis and function in the retina. Rats received daily intraperitoneal injections of voriconazole (60 mg/kg), minocycline (22 mg/kg), voriconazole plus minocycline, or vehicle during five consecutive days. The rats were submitted to electroretinography to monitor retinal functionality. Cholesterol and 24S-hydroxycholesterol were measured in plasma, brain and retina by gas chromatog…
Lipoprotein(a) levels in relation to albumin concentration in childhood nephrotic syndrome
1999
have been found in patients with end-stage renal disMethods. To investigate a model of nephrotic syndrome in eases, whereas after kidney transplantation, Lp(a) levels the absence of renal failure, we studied a group of 84 children seem to decrease [7‐9]. To explain the increase of Lp(a) in different clinical stages of the disease for a period of five plasma levels in end-stage renal diseases, it has been years. We evaluated the direct relationships between lipoproteins, including Lp(a), and/or plasma albumin and proteinuria. suggested that the kidney might play a role in Lp(a) Results. Lp(a) levels were significantly higher in the subjects metabolism as a catabolic site or by producing some…
National trends in total cholesterol obscure heterogeneous changes in HDL and non-HDL cholesterol and total-to-HDL cholesterol ratio : a pooled analy…
2020
Artículo con numerosos autores. Sólo quedan reflejados el primero, los pertenecientes a la UAM y el colectivo
Lipid profile, cardiovascular disease and mortality in a Mediterranean high-risk population: The ESCARVAL-RISK study
2017
Introduction The potential impact of targeting different components of an adverse lipid profile in populations with multiple cardiovascular risk factors is not completely clear. This study aims to assess the association between different components of the standard lipid profile with allcause mortality and hospitalization due to cardiovascular events in a high-risk population. Methods This prospective registry included high risk adults over 30 years old free of cardiovascular disease (2008-2012). Diagnosis of hypertension, dyslipidemia or diabetes mellitus was inclusion criterion. Lipid biomarkers were evaluated. Primary endpoints were all-cause mortality and hospital admission due to corona…
Molecular mechanisms of hepatotoxic cholestasis by clavulanic acid: Role of NRF2 and FXR pathways.
2021
Treatment of β-lactamase positive bacterial infections with a combination of amoxicillin (AMOX) and clavulanic acid (CLAV) causes idiosyncratic drug-induced liver injury (iDILI) in a relevant number of patients, often with features of intrahepatic cholestasis. This study aims to determine serum bile acid (BA) levels in amoxicillin/clavulanate (A + C)-iDILI patients and to investigate the mechanism of cholestasis by A + C in human in vitro hepatic models. In six A + C-iDILI patients, significant elevations of serum primary conjugated BA definitely demonstrated A + C-induced cholestasis. In cultured human Upcyte hepatocytes and HepG2 cells, CLAV was more cytotoxic than AMOX, and, at subcytoto…
Biosynthesis and transformation of 20α 21-dihydroxycholesterol by rat adrenal preparations
1979
Abstract The biosynthesis of [ 3 H]-20α, 21 dihydroxycholestderol from [ 3 H]-20α-hydroxycholesterol and its transformation to [ 3 H]-21-hydroxypregnenolone by rat adrenal preparations has been demonstrated. 20α-Hydroxycholesterol was transformed to 20α, 21-dihydroxycholesterol by microsomal preparations in the presence of NADPH and 20α-21-dihydroxycholesterol was metabolized to 21-hydroxypregnenolone by mitochondrial preparations in the presence of a NADPH-generating-system. Comparison of the Michaelis-Menten-Kinetics of the steps “20α, 21-dihydroxycholesterol → 21-hydroxycholesterol” and “20α-hydroxycholesterol → pregnenolone” revealed that both compounds behaved as analogue substrates of…
Management of homozygous familial hypercholesterolaemia in two brothers
2018
Homozygous familial hypercholesterolaemia (HoFH) is a rare, genetic disorder of abnormally high levels of low-density lipoprotein cholesterol (LDL-C) requiring aggressive interventions to retard the evolution of atherosclerotic cardiovascular disease. We treated two brothers (ages 46 years and 47 years) with HoFH with statins, lipoproteinapheresis (LA) and the microsomal triglyceride transfer protein inhibitor lomitapide. Both brothers carried the p.Thr434Arg homozygous LDLR mutation and had childhood total cholesterol levels >700 mg/dL. Inter-LA LDL-C levels remained high; therefore, they were given escalating doses of oral lomitapide (5–10 mg/day). One brother was able to maintain LDL-C l…
Statin Treatment and Prognosis of Elderly Patients Discharged after Non-ST Segment Elevation Acute Coronary Syndrome
2019
<b><i>Background:</i></b> Statins are recommended for secondary prevention. Our aims were to describe the proportion of very elderly patients receiving statins after non-ST segment elevation acute coronary syndrome (NST-ACS) and to determine the prognostic implications of statins use. <b><i>Methods:</i></b> This prospective registry was performed in 44 hospitals that included patients ≥80 years discharged after a NST-ACS from April 2016 to September 2016. <b><i>Results:</i></b> We included 523 patients, the mean age was 84.2 ± 4.0 years and 200 patients (38.2%) were women. Previous statin treatment was recorded in 282 p…
An innovative lipid-lowering approach to enhance attainment of low-density lipoprotein cholesterol goals
2020
Aims To improve attainment of LDL-cholesterol (LDL-c) targets, an expert group proposed an algorithm for lipid-lowering therapy during hospitalization for acute coronary syndrome and during follow-up. We aimed to assess adherence to this algorithm, and evaluate its impact on LDL-c levels and on attainment of therapeutic LDL-c targets in a population of post-acute coronary syndrome patients. Methods and results Prospective, observational study including patients admitted for acute coronary syndrome between February 2017 and September 2018. Patients admitted without statins or ezetimibe were considered ‘naïve’. Baseline LDL-c was admission LDL-c in naïve patients, and for those taking lipid-…
Insulin resistance and acute coronary syndrome
2010
BACKGROUND: Insulin resistance (IR), which can be quantified by HOMA index (fasting glucose X fasting insulin/22.5), is considered the "primum movens" for the development of Metabolic Syndrome. Many authors have suggested that insulin resistance could raise both incidence and mortality of coronary heart disease (CHD). IR is also associated with important predictors of cardiovascular disease, as increased concentration of LDL or triglyceride, decreased concentration of HDL, high systolic blood pressure, visceral obesity. There is accumulating evidence that chronic sub-clinical inflammation, as measured by inflammatory markers as C-reactive protein (CRP) and fibrinogen, is related with insuli…