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  • Title: Abnormalities in plasma lipoprotein in familial partial lecithin:cholesterol acyltransferase deficiency.
    Author: Kodama T, Akanuma Y, Okazaki M, Aburatani H, Itakura H, Takahashi K, Sakuma M, Takaku F, Hara I.
    Journal: Biochim Biophys Acta; 1983 Aug 01; 752(3):407-15. PubMed ID: 6871236.
    Abstract:
    Abnormalities in plasma lipoproteins from patients with familial partial lecithin:cholesterol acyltransferase deficiency were studied. In these patients the plasma cholesterol ester ratio was about 40% and plasma apolipoprotein B level remained within the normal range. The content of large-sized low-density-lipoproteins (LDL) was low. Apolipoprotein B-100 and B-48 were detected in very-low-density lipoproteins (VLDL) and LDL in patients' plasma. In patients' LDL, apolipoprotein B-48 was primarily present in large-sized particles. Apolipoprotein E and A-I were mainly detected in intermediate-sized LDL. High-density lipoproteins (HDL) were separated into three fractions by gel permeation chromatography. Large-sized HDL particles (150-200 A) including discoidal particles contained apolipoproteins, E, A-IV and A-I. The content of discoidal HDL was low and, on electron micrograph, rouleau-formed particles were rarely seen. Normal-sized HDL (80-100 A) contained apolipoproteins A-I and A-II and small-sized HDL (about 60 A) contained only apolipoprotein A-I. Although several lipoprotein abnormalities were similar to those in classical familial lecithin:cholesterol acyltransferase deficiency, remaining lecithin:cholesterol acyltransferase activity may, however, cause a lack of reduction of apolipoprotein B level, a low level of large-sized LDL and also a low level of discoidal HDL.
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