Abstract:
BACKGROUND:Low blood levels of antioxidants are associated with an increased risk of developing coronary artery disease. Lipophilic antioxidants are transported in lipoproteins, and hypolipidaemic therapy may therefore alter their blood concentrations. METHODS:The present randomized, placebo-controlled cross-over study of 21 men with combined hyperlipidaemia examines whether 10-12 weeks of gemfibrozil treatment affects the serum concentrations of the antioxidants ubiquinone-10 or alpha- or gamma-tocopherol. RESULTS:Gemfibrozil treatment lowered plasma triglycerides and both total and very low-density lipoprotein (VLDL)-cholesterol (P < 0.001 for all by ANOVA), whereas high-density lipoprotein (HDL)-cholesterol increased (P < 0.001). The median serum levels of ubiquinone-10 decreased from 1.30 mumol L-1 (interquartile range 0.87-1.71 mumol L-1) with placebo to 0.76 mumol L-1 (0.66-0.95) with gemfibrozil treatment (P < 0.001). Corresponding levels for alpha- and gamma-tocopherol were: 68.5 mumol L-1 (51.1-84.7) vs. 40.8 mumol L-1 (30.3-55.0) and 8.6 mumol L-1 (5.2-16.7) vs. 4.3 mumol L-1 (3.5-7.0) respectively (P < 0.001 for both). The decrease in serum antioxidants was also evident when standardized for total cholesterol (P < 0.05) or LDL-cholesterol (P < 0.001). Normolipaemic control subjects had significantly lower antioxidant levels than placebo-treated patients: ubiquinone 0.63 mumol L-1 (0.41-1.05), alpha-tocopherol 34.3 mumol L-1 (27.3-45.6) and gamma-tocopherol 3.2 mumol L-1 (2.5-4.2) (P < 0.001 for all). The association of antioxidants with lipoprotein lipids was further established by positive correlations between the levels of antioxidants and those of total cholesterol (r = 0.64, P < 0.001) or total triglycerides (r = 0.71, P < 0.001). CONCLUSION:Gemfibrozil treatment of men with combined hyperlipidaemia reduces serum antioxidant levels to the levels seen in healthy normolipidaemic men. The mechanisms and the relevance of this finding remain unclear and need to be addressed in further studies.
journal_name
Eur J Clin Investjournal_title
European journal of clinical investigationauthors
Aberg F,Appelkvist EL,Bröijersén A,Eriksson M,Angelin B,Hjemdahl P,Dallner Gdoi
10.1046/j.1365-2362.1998.00262.xsubject
Has Abstractpub_date
1998-03-01 00:00:00pages
235-42issue
3eissn
0014-2972issn
1365-2362journal_volume
28pub_type
临床试验,杂志文章,随机对照试验abstract::To diagnose hypolactasia, determination of lactase enzyme activity in small intestinal biopsy material is considered to be the golden standard. Because of its strongly invasive character and the sampling problems, alternative methods have been looked for. We analysed the 13C-glucose response in serum after consumption...
journal_title:European journal of clinical investigation
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abstract:AIM:Observationally, low serum testosterone among men is associated with cardiovascular diseases and its risk factors, but it is unclear whether raising endogenous androgens would be protective. To clarify the role of androgens, the association of two different androgen biomarkers (serum testosterone and androstanediol...
journal_title:European journal of clinical investigation
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journal_title:European journal of clinical investigation
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abstract:BACKGROUND:Studies evaluating the relationship between soluble transferrin receptor (sTfR), a biomarker inversely related to body iron stores, and risk of type 2 diabetes mellitus (T2DM) are scarce and inconclusive. Furthermore, sTfR concentrations have been observed to be significantly higher in obese than in nonobese...
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journal_title:European journal of clinical investigation
pub_type: 杂志文章
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journal_title:European journal of clinical investigation
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journal_title:European journal of clinical investigation
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journal_title:European journal of clinical investigation
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journal_title:European journal of clinical investigation
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:European journal of clinical investigation
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journal_title:European journal of clinical investigation
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journal_title:European journal of clinical investigation
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journal_title:European journal of clinical investigation
pub_type: 杂志文章,多中心研究,随机对照试验
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journal_title:European journal of clinical investigation
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