Shlomo Keidar

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OBJECTIVE Clinical trials of vitamin E have failed to demonstrate a decrease in cardiovascular events. However, these studies did not address possible benefit to subgroups with increased oxidative stress. Haptoglobin (Hp), a major antioxidant protein, is a determinant of cardiovascular events in patients with Type 2 diabetes mellitus (DM). The Hp gene is(More)
Apolipoprotein E-deficient mice, since their introduction in the early 1990s, have proved to be a very popular model for studying spontaneous hypercholesterolemia and the subsequent development of atherosclerotic lesions. The pathogenesis of atherosclerotic lesions in these mice mimics that found in humans on a very short time-scale. Atherosclerotic lesion(More)
Atherosclerosis is characterized by macrophage foam cells formation, which originate from differentiating blood monocytes that have taken up oxidized LDL (Ox-LDL) at enhanced rate. Statin therapy exhibit pleiotropic effects on many components of atherosclerosis. We have studied the effect of atorvastatin therapy in hypercholesterolemic patients, on the(More)
To assess the effect of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitors on plasma cholesterol concentrations and on platelet aggregation, lovastatin or fluvastatin, 40 mg daily, was given to hypercholesterolemic patients. After 24 weeks, plasma low-density lipoprotein (LDL) cholesterol concentrations were reduced by 37% after lovastatin(More)
Homozygous familial hypercholesterolemia (HFH) is a very rare autosomal dominant disease characterized by accelerated severe atherosclerosis. We examined 18 patients from 9 families with HFH. The age range was 6-30 years (mean = 16 years). Male to female ratio was equal. All patients had huge, multiple tuberous xanthomas on the skin and tendons. Mean +/-(More)
The goal of the present study was to elucidate mechanisms for angiotensin II (Ang II) induction of oxidized low density lipoprotein (Ox-LDL) uptake by macrophages, the hallmark of early atherosclerosis. Compared with placebo treatment, Ang II injections (0.1 mL, 10(-7) mol/L per day) for 2 weeks to apolipoprotein E-deficient mice significantly increased(More)
BACKGROUND The renin-angiotensin-aldosterone system is involved in the pathogenesis of atherosclerosis, partially because of its pro-oxidative properties. We questioned the effect and mechanisms of action of administration of aldosterone to apolipoprotein E-deficient (E(0)) mice on their macrophages and aorta oxidative status and the ability of(More)
The study of biological aging has seen spectacular progress in the last decade and markers are increasingly employed for understanding physiological processes that change with age. Recently, it has been demonstrated that apolipoprotein E (apoE) has a major impact on longevity, but its mechanisms are still not fully understood. ApoE-deficient (E(o)) mice(More)
Hypertension is a known risk factor for the development of atherosclerosis. However, in most of the studies, no effect of blood pressure reduction was demonstrated on the incidence of coronary artery disease, except in the SHEP study in which it was shown that in older persons, with isolated systolic hypertension, antihypertensive stepped-care drug(More)
BACKGROUND Lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) is a membrane protein that can act as a surface endocytosis receptor for oxidized LDL (ox-LDL). As increased cellular uptake of ox-LDL by macrophages and activated smooth muscle cells may transform these cells into foam cells, potential interactions among LDL oxidation, ox-LDL(More)