title: Ubiquinol-10/lipids ratios in consecutive patients with different angiographic findings.
abstract: OBJECTIVE
  Information concerning un-supplemented plasma concentrations of ubiquinol-10 in coronary artery disease patients is still controversial. The aim of this study is to determine the levels of plasma ubiquinol-10 and ratios of ubiquinol-10 to plasma lipids in consecutive patients with different angiographic findings.
  
  
  METHODS
  Thirty-six consecutive patients who underwent coronary angiography were split in two groups with different atherosclerotic changes. These patients were un-supplemented with antioxidants and were not treated by lipid-lowering medication. We have measured a plasma level of ubiquinol-10 using high-performance liquid chromatography with coulometric detection. Conventional plasma lipids, markers of oxidative stress and other widely accepted risk factors of atherosclerosis have been determined too.
  
  
  RESULTS
  Plasma ubiquinol-10 to low-density lipoprotein cholesterol (LDL-C) ratios in patients with different angiographic findings have been found as 180+/-69 and 132+/-43, respectively (p=0.020). The ubiquinol-10/LDL-C ratio was significantly lower in angiographically positive patients. There were also significant differences in ubiquinol-10 per total cholesterol (109+/-47 and 80+/-26, respectively; p=0.031), per triglycerides (426+/-191 and 237+/-86, respectively; p=0.002) and per the sum of triglycerides and total cholesterol (86+/-35 and 61+/-20, respectively; p=0.013).
  
  
  CONCLUSIONS
  There have not been found any significant differences between levels of widely accepted risk factors for genesis and progress of atherosclerotic changes in these two groups of patients. Only the level of triglycerides and the total cholesterol minus high-density lipoprotein cholesterol/high-density lipoprotein cholesterol ratio were significantly higher in patients with stenosis. This ratio correlated with the ubiquinol-10/LDL-C ratio, which was significantly lower in patients with stenosis. Our results indicate that the ratio of ubiquinol-10/LDL-C is likely to be a risk factor for atherogenesis.
authors.affiliation: Faculty of Chemical Technology, Department of Biological and Biochemical Sciences, University of Pardubice, Strossova 239, 530 03 Pardubice, Czech Republic. pavla.zakova@upce.cz
authors.forename: Pavla
authors.initials: P
authors.lastname: Záková
authors.forename: Roman
authors.initials: R
authors.lastname: Kand'ár
authors.forename: Lucie
authors.initials: L
authors.lastname: Skarydová
authors.forename: Jirí
authors.initials: J
authors.lastname: Skalický
authors.forename: Andrej
authors.initials: A
authors.lastname: Myjavec
authors.forename: Petr
authors.initials: P
authors.lastname: Vojtísek
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000975:Antioxidants / Q000494:pharmacology; D015415:Biomarkers / Q000097:blood*; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000175:diagnosis* / Q000378:metabolism; D005260:Female; D006801:Humans; D008055:Lipids / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D014451:Ubiquinone / Q000031:analogs & derivatives* / Q000097:blood; D014810:Vitamin E / Q000378:metabolism
chemical_list: D000975:Antioxidants; D015415:Biomarkers; D008055:Lipids; D014451:Ubiquinone; D014810:Vitamin E; C026663:ubiquinol-10