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- W1996546400 abstract "Plasma lipoproteins from patients with familial lecithin:cholesterol acyltransferase (LCAT) deficiency have been fractioned by preparative ultra-centrifugation and gel filtration and their lipid content and reactivity studied. All of the lipoproteins are abnormal with respect to lipid concentration or relative lipid content. The low density lipoproteins (LDL) and high density lipoproteins (HDL) appear to react normally with partially purified LCAT from normal plasma. Also, the lipids of the very low density lipoproteins (VLDL) and LDL, like those of the corresponding lipoproteins of normal plasma, are indirectly altered by the action of LCAT on normal HDL. Thus, during incubation in vitro VLDL cholesteryl ester is increased and VLDL triglyceride is decreased, as described by others for VLDL from hyperlipemic plasma, and both the unesterified cholesterol and lecithin of the VLDL and LDL are decreased. The patients' VLDL and LDL are abnormal, however, in that they lose unesterified cholesterol and lecithin to normal HDL in the absence of LCAT. Also, the patients' HDL lose these lipids to erythrocyte membranes in the absence of the enzyme. Our results provide further evidence that the abnormal cholesterol and phospholipid composition of the patients' lipoproteins is caused by the LCAT deficiency. They support the postulate that an excess of unesterified cholesterol and lecithin develops as VLDL are converted to LDL and HDL and suggest that in the absence of LCAT this excess lipid distributes among plasma lipoproteins and plasma membranes. They further suggest that LCAT normally reduces this excess lipid through a combination of direct and indirect effects." @default.
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- W1996546400 title "Plasma lipoproteins in familial lecithin:cholesterol acyltransferase deficiency: lipid composition and reactivity in vitro" @default.
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- W1996546400 doi "https://doi.org/10.1172/jci106400" @default.
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