title: Distribution and composition of HDL subclasses in students whose parents suffered prematurely from a myocardial infarction in comparison with controls.
abstract: The purpose of this study was to analyze the distribution and composition of the HDL subclasses in students whose parents suffered from a premature coronary heart disease (CHD), in comparison with a control group without any familial history of CHD. In the first part of this study, we observed significantly lower apo A-I concentrations in the cases than in the controls. Since there was a significant difference in smoking habits between cases and controls, and since we wanted to study the effect of a parental history of premature CHD on the composition of the HDL subclasses independently of smoking, the present study was conducted on the 17 pairs of non-smokers male cases and controls. In agreement with the results on total serum, we observed lower apo A-I concentrations in the HDL2b and HDL2a + 3a fractions in the cases compared to the controls. The apo A-II and cholesterol levels in these fractions were not significantly different between the 2 groups. The selective decrease of apo A-I in the HDL subclasses with the lowest density might be due to a decreased number of particles containing only apo A-I, with which a protective effect against atherosclerosis might be associated.
mesh_terms: D000328:Adult; D016632:Apolipoprotein A-I; D016633:Apolipoprotein A-II; D001054:Apolipoproteins A / Q000097:blood; D002784:Cholesterol / Q000097:blood; D005260:Female; D006801:Humans; D008075:Lipoproteins, HDL / Q000097:blood*; D008297:Male; D009203:Myocardial Infarction / Q000097:blood / Q000235:genetics*; D012306:Risk
chemical_list: D016632:Apolipoprotein A-I; D016633:Apolipoprotein A-II; D001054:Apolipoproteins A; D008075:Lipoproteins, HDL; D002784:Cholesterol