Abstract
ATHEROSCLEROSIS in animals and humans is associated with an unresponsiveness of arteries and arterioles to endothelium-dependent vasodilators1–3—agents acting on smooth muscle indirectly by stimulating the release from endothelial cells of a vasodilator principle (endothelium-derived relaxing factor)4. Altered vasomotor regulation in atherosclerosis could partly reflect an injurious action of abnormal lipoproteins on endothelium5,6. Recently, 'cell-modified' or 'oxidized' low-density lipoprotein (EC-LDL) has received increasing attention because of its potential cytotoxic and atherogenic properties7. We report here that arteries exposed to EC-LDL in vitro show an endothelium-dependent vasoregulatory impairment closely resembling that of atherosclerotic arteries. Our results indicate that transfer of lysolecithin from EC-LDL to endothelial membranes produces a selective unresponsiveness to receptor-regulated endothelium-dependent vasodilators.
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Kugiyama, K., Kerns, S., Morrisett, J. et al. Impairment of endothelium-dependent arterial relaxation by lysolecithin in modified low-density lipoproteins. Nature 344, 160–162 (1990). https://doi.org/10.1038/344160a0
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DOI: https://doi.org/10.1038/344160a0
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