CLINICAL STUDY
Low apolipoprotein A-IV plasma concentrations in men with coronary artery disease
Florian Kronenberg, MD*,
Markus Stühlinger, MD ,
Evi Trenkwalder, PhD*,
F. S. Geethanjali, PhD ,
Otmar Pachinger, MD,
Arnold von Eckardstein, MD and
Hans Dieplinger, PhD*
* Institute of Medical Biology and Human Genetics, University of Innsbruck, Innsbruck, Austria
Innsbruck University Hospital, Department of Cardiology, Innsbruck, Austria
Department of Clinical Biochemistry, Christian Medical College and Hospital, Vellore, India
Institut für Klinische Chemie und Laboratoriumsmedizin, Zentrallaboratorium, Universität Münster, Münster, Germany
Manuscript received December 23, 1999;
revised manuscript received March 1, 2000,
accepted April 13, 2000.
Reprint requests and correspondence: Dr. Florian Kronenberg, Institute of Medical Biology and Human Genetics, University of Innsbruck, Schöpfstrasse 41, A-6020 Innsbruck, Austria
Florian.Kronenberg{at}uibk.ac.at
OBJECTIVES
The objective of this study was to evaluate the relation between apolipoprotein A-IV (apoA-IV) plasma concentrations and coronary artery disease (CAD).
BACKGROUND
Experimental in vitro and in vivo studies favor apoA-IV to be protective against the development of atherosclerosis. Mice that overexpress either human or mouse apoA-IV demonstrated a significant reduction of aortic atherosclerotic lesions compared with control mice. Data on apoA-IV plasma concentrations and CAD in humans are lacking.
METHODS
We determined in two independent case-control studies of a Caucasian and an Asian Indian population whether apoA-IV plasma concentrations are related to the presence of angiographically assessed CAD.
RESULTS
Plasma apoA-IV levels were significantly lower in 114 male Caucasian subjects with angiographically defined CAD when compared with 114 age-adjusted male controls (10.2 ± 3.8 mg/dL vs. 15.1 ± 4.0 mg/dL, p < 0.001). Logistic regression analysis indicated that the association between apoA-IV levels and CAD was independent of the high-density lipoprotein cholesterol and triglyceride concentrations. The inverse relationship between plasma levels of apoA-IV and the presence of CAD was confirmed in an independent sample of 68 male Asian Indians with angiographically documented CAD and 68 age-matched controls.
CONCLUSIONS
The results of this cross-sectional study demonstrate for the first time an association between low apoA-IV concentrations and CAD in humans and suggest that apoA-IV may play an antiatherogenic role in humans.
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Abbreviations and Acronyms
| | apoA-IV | = apolipoprotein A-IV | | apoA-I | = apolipoprotein A-I | | CAD | = coronary artery disease | | EARS | = European Atherosclerosis Research Study | | HDL | = high-density lipoprotein | | LDL | = low-density lipoprotein | | OR | = odds ratio |
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