4.6 Article

Apolipoproteins E and C-III in apo B- and non-apo B-containing lipoproteins in middle-aged women from the Stanislas cohort: effect of oral contraceptive use and common apolipoprotein E polymorphism

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ATHEROSCLEROSIS
卷 155, 期 2, 页码 509-516

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ELSEVIER SCI IRELAND LTD
DOI: 10.1016/S0021-9150(00)00600-6

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oral contraceptives; lipoproteins; apolipoprotein E; apolipoprotein C-III; apolipoprotein E polymorphism

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Oral contraceptive (OC) use and common apo E polymorphism are well known to modify serum lipid and lipoprotein concentrations. The combined effect of OC use and apo E genotype on the concentration of apo E or apo C-III in apo B- (apo E-LpB or apo C-III-LpB) or in non-ape B-containing lipoparticles (apo E-Lp-non-B or apo C-III-Lp-non-B) are unknown. Our study comprised 613 women, aged 30-45 years, genotyped for common apo E polymorphism and who differed in their combined low-dose OC consumption. The concentrations of apo C-III. apo C-III-LpB and apo C-III-Lp-non-B were significantly higher in OC users than in non-users by 13. 23 and 8%, respectively, without significant interaction with the apo E genotype. The concentrations of apo E and apo E-Lp-non-B were significantly lower (differences bring - 14% and - 31% respectively) in OC users than in controls whereas the apo E-LpB concentration was significantly higher ( + 19%), resulting in a redistribution of apo E from Lp-non-B towards LpB. Total apo E and apo E-Lp-non-B concentrations were higher in subjects carrying the epsilon2 allele and lower in those with the epsilon4 allele epsilon3/epsilon3 compared to epsilon3/epsilon3 subjects (P < 0.001). The opposite held for the apo E- LpB concentration (P < 0.05). The main finding is the significant interaction between apo E genotype and OC use (P < 0.01) on apo E-Lp-non-B concentration, the 4 carriers showing the smallest differences between OC users and non-users in comparison with the epsilon2 Or epsilon3/epsilon3 carriers. These results suggest that the common apo E polymorphism can modulate the OC use effect. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.

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