title: Small dense LDL phenotype is associated with postprandial increases of large VLDL and remnant-like particles in patients with acute myocardial infarction.
abstract: BACKGROUND
  The small dense low-density lipoprotein (LDL) phenotype (pattern B), high concentrations of remnant-like particles (RLPs), and postprandial lipemia are newly recognized risk factors for coronary heart disease (CHD). However, the associations of these lipoprotein abnormalities remain unclear. The aim of this study was to investigate the relationships among LDL phenotype, very-low-density lipoprotein (VLDL) subclasses, and postprandial lipoprotein metabolism in CHD patients.
  
  
  METHODS
  We performed an oral fat tolerance test in 32 patients with acute myocardial infarction and compared the following parameters between patients characterized by either large buoyant LDL (pattern A) versus pattern B: lipids and apolipoproteins (apo) in the plasma and Svedberg flotation rates (Sf) >400 (chylomicron), Sf 60-400 (large VLDL), and Sf 20-60 (small VLDL) fractions.
  
  
  RESULTS
  Fasting levels of triglyceride, RLP-cholesterol and RLP-triglyceride were slightly higher in the pattern B patients. Postprandial increases of RLP-cholesterol and the cholesterol and triglyceride of large VLDL fractions were significantly greater in the pattern B patients. The areas under the curves of cholesterol, triglyceride, and apo-B in large VLDL fractions were significantly higher in pattern B, while those in small VLDL were not. RLP-cholesterol and RLP-triglyceride in fasting and fed states correlated very highly with the corresponding cholesterol and triglyceride concentrations in large VLDL fractions.
  
  
  CONCLUSIONS
  These results suggest that postprandial increase of large VLDL fractions and RLPs contribute to the formation of small dense LDL in CHD patients.
authors.affiliation: Third Department of Internal Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8666, Japan. skoba@med.showa-u.ac.jp
authors.forename: Shinji
authors.initials: S
authors.lastname: Koba
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Hirano
authors.forename: Satoru
authors.initials: S
authors.lastname: Murayama
authors.forename: Tomomi
authors.initials: T
authors.lastname: Kotani
authors.forename: Fumiyosi
authors.initials: F
authors.lastname: Tsunoda
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Iso
authors.forename: Yoshihisa
authors.initials: Y
authors.lastname: Ban
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kondo
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Suzuki
authors.forename: Takashi
authors.initials: T
authors.lastname: Katagiri
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015906:Angioplasty, Balloon, Coronary; D001059:Apoproteins / Q000235:genetics / Q000378:metabolism; D019540:Area Under Curve; D015415:Biomarkers / Q000097:blood; D008076:Cholesterol, HDL / Q000235:genetics / Q000378:metabolism; D008078:Cholesterol, LDL / Q000145:classification / Q000235:genetics* / Q000378:metabolism; D015243:Cholesterol, VLDL / Q000145:classification / Q000235:genetics* / Q000378:metabolism; D003920:Diabetes Mellitus / Q000453:epidemiology / Q000235:genetics / Q000378:metabolism; D005215:Fasting / Q000378:metabolism; D005260:Female; D020022:Genetic Predisposition to Disease / Q000453:epidemiology / Q000235:genetics; D005838:Genotype; D006706:Homeostasis / Q000502:physiology; D006801:Humans; D007328:Insulin / Q000235:genetics / Q000378:metabolism; D007333:Insulin Resistance / Q000235:genetics; D007564:Japan; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000453:epidemiology / Q000235:genetics* / Q000628:therapy; D010316:Particle Size; D010343:Patient Admission; D010641:Phenotype; D019518:Postprandial Period / Q000235:genetics*; D012307:Risk Factors; D013223:Statistics as Topic; D013997:Time Factors; D014280:Triglycerides / Q000235:genetics / Q000378:metabolism
chemical_list: D001059:Apoproteins; D015415:Biomarkers; D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D015243:Cholesterol, VLDL; D007328:Insulin; D014280:Triglycerides