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  • Title: Concentrations of apolipoproteins B, C-I, C-II, C-III, E and lipids in serum and serum lipoproteins of normal subjects during alimentary lipaemia.
    Author: Annuzzi G, Holmquist L, Carlson LA.
    Journal: Scand J Clin Lab Invest; 1989 Feb; 49(1):73-81. PubMed ID: 2727620.
    Abstract:
    The effect of alimentary lipaemia, induced by ingestion of 100 g of fat (cream), on lipids and apolipoprotein B, C-I, C-II, C-III and E levels was evaluated in 16 normotriglyceridaemic subjects. Apolipoprotein concentrations were determined by enzyme immunoassay in whole serum and, in a subsample of seven subjects, in serum lipoprotein fractions of d less than 1.006 kg/l (supernatant) containing very low density lipoproteins (VLDL) and chylomicrons and of d greater than 1.006 kg/l (infranatant) containing low density lipoproteins (LDL) and high density lipoproteins (HDL). Triglyceride concentrations in the supernatant were increased by 164% 3 h after the fat ingestion. The level of alimentary lipaemia was positively related to the fasting serum concentrations of triglycerides and apolipoproteins C-II and C-III and inversely related to the fasting concentration of apolipoprotein E in the infranatant lipoprotein fraction with d greater than 1.006 kg/l. No significant changes in the serum levels of apolipoproteins B, C-I and E were found during the postprandial lipaemia. By contrast, serum concentrations of apolipoproteins C-II and C-III were decreased (compared to the fasting levels) 6 h after the fatty meal. In the 3-h samples all apolipoproteins were increased in the supernatant (VLDL + chylomicrons) and a corresponding decrease was observed in the infranatant (LDL + HDL). In conclusion, this study shows that in normotriglyceridaemic subjects a high serum level of apo C-II is not associated with a more rapid clearance of alimentary lipaemia than a low level.(ABSTRACT TRUNCATED AT 250 WORDS)
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