http://www.sciencedirect.com/science/article/pii/S0300908415004289
Dedicated
to the memory of L. Douste-Blazy (MD, DrSc, Professor of Biochemistry,
Faculty of Medicine, University of Toulouse, France).
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- Atherosclerosis is a universal process in humans. Brief picture of Atherogenesis.
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- The 'Lipid theory of atherosclerosis'. From early discoveries to modern era: cholesterol, LDL receptor and scavenger receptor pathways.
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- The 'oxidative theory of atherosclerosis'. Free radicals, Reactive oxygen species, LDL oxidation, biological properties and potential role of oxidized LDLs in atherogenesis.
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- Antioxidants are effective to prevent LDL oxidation and delay atherogenesis in animal models, but do not prevent myocardial infarction and coronary heart disease death in humans.
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- The 'Mediterranean diet' seems to be protective against cardiovascular events and death.
Abstract
Atherosclerosis
is a multifactorial process that begins early in infancy and affects
all the humans. Early steps of atherogenesis and the evolution towards
complex atherosclerotic plaques are briefly described. After a brief
history of the 'Lipid theory of atherosclerosis', we report the most
prominent discoveries on lipoproteins, their receptors and metabolism,
and their role in atherogenesis. The main focus is the 'oxidative theory
of atherosclerosis', with emphasis on free radicals and reactive oxygen
species, lipid peroxidation and LDL oxidation, biological properties of
oxidized LDL and their potential role in atherogenesis. Then, we report
the properties of antioxidants and antioxidant systems and their
effects in vitro, on cultured cells, in animal models and in humans. The
surprising discrepancy between the efficacy of antioxidants in vitro
and in animal model of atherosclerosis and the lack of protective effect
against cardiovascular events and death in epidemiological study and
clinical trials are discussed. In contrast, epidemiological studies seem
to indicate that the Mediterranean diet may protect (in part) against
atherosclerosis complications (myocardial infarction and cardiovascular
death).
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