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- W2096023746 abstract "Although both cholesterol and plant sterols are abundant in our diets, our intestinal epithelial cells selectively and efficiently rid the body of plant sterols. However, a rare mutation in plant sterol excretion in humans results in the accumulation of plant sterols, particularly sitosterol, in the plasma and tissues. Sitosterol differs from cholesterol only in an extra ethyl group on the sterol side chain. Significantly, sitosterolemia is associated with accelerated atherothrombotic vascular disease, notably myocardial infarction. An important process that promotes atherothrombosis is advanced lesional macrophage death, leading to plaque necrosis. One of the causes of atherosclerotic macrophage death is sterol-induced cytotoxicity. We therefore compared the effects of excess intracellular sitosterol vs. cholesterol on macrophage death. Whereas excess cholesterol kills macrophages by caspase-dependent apoptosis, sitosterol kills macrophages by a caspase-independent pathway involving necroptosis and autophagy. The finding that an ethyl group on the sterol side chain fundamentally alters the way cells respond to excess sterols adds new insight into the mechanisms of sterol-induced cell death and may provide at least one explanation for the excess atherosclerotic heart disease in patients with sitosterolemia." @default.
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- W2096023746 date "2007-01-08" @default.
- W2096023746 modified "2023-10-16" @default.
- W2096023746 title "A Two-Carbon Switch to Sterol-Induced Autophagic Death" @default.
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- W2096023746 doi "https://doi.org/10.4161/auto.3398" @default.
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