Serum Paraoxonase Activity and the Extent of Lipid Peroxidation Are not Affected by Increased Levels of Human Apolipoprotein A-I: Studies in Transgenic Mice
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Mira Rosenblat
Abstract
The present study analyzed the effect of increased concentrations of human apolipoprotein (apo) A-I in transgenic mice serum on paraoxonase activity and on lipid peroxidation. In the transgenic mice serum, in comparison to control (non-transgenic) C57BL/6 mice, we found high concentrations of human apoA-I and high-density lipoprotein (HDL)-cholesterol, but serum lipid peroxidation (basal and free radical-induced) and serum paraoxonase activity were similar in the two mouse groups. Comparing the individual results, no significant correlation was found between free radical-induced serum lipid peroxidation and apoA-I concentrations. Serum paraoxonase activity also did not correlate with serum concentrations of human apoA-I. However, a significant inverse relationship (R2=0.75) was observed between the individual values of paraoxonase activity and free radical-induced lipid peroxidation in both mouse groups. Direct analysis of the effect of pure human apoA-I and paraoxonase (using the specific paraoxonase inhibitor PD-92770) on lipid peroxidation also revealed that paraoxonase, but not apoA-I, protects serum lipids from oxidation.
We thus conclude that the increased human apoA-I concentration in the mouse serum neither affect serum paraoxonase activity, nor protects against lipid peroxidation, whereas paraoxonase significantly inhibits serum lipid peroxidation.
Copyright © 2002 by Walter de Gruyter GmbH & Co. KG
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- Serum Paraoxonase Activity and the Extent of Lipid Peroxidation Are not Affected by Increased Levels of Human Apolipoprotein A-I: Studies in Transgenic Mice
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- Science, Alchemy and Light: Paintings by Joseph Wright of Derby
- Approved IFCC Reference Method for the Measurement of HbA1c in Human Blood
- Meetings and Awards
Articles in the same Issue
- Editorial
- Growing Significance of Myeloperoxidase in Non-infectious Diseases
- Serum Paraoxonase Activity and the Extent of Lipid Peroxidation Are not Affected by Increased Levels of Human Apolipoprotein A-I: Studies in Transgenic Mice
- Relationship between the Sialic Acid Content of Low-Density Lipoprotein (LDL) and Autoantibodies to Oxidized LDL in the Plasma of Healthy Subjects and Patients with Atherosclerosis
- The Presence of Heparin-Platelet Factor 4 Antibodies as a Marker of Hypercoagulability during Hemodialysis
- Clinical Evaluation of Changes in the Morphology of Eosinophils
- The n-3 and n-6 Polyunsaturated Fatty Acid Composition of Plasma Phospholipids in Pregnant Women and Their Infants. Relationship with Maternal Linoleic Acid Intake
- Quantification of Sirolimus by Liquid Chromatography-Tandem Mass Spectrometry Using On-Line Solid-Phase Extraction
- The Effects of Affinity-Purified Anti-DNA Antibodies Derived from Patients with Systemic Lupus Erythematosus on the Fluorescent Antinuclear Antibody Assay Using HEp-2 Cells
- Relationships between Serum Markers of Monocyte/Macrophage Activation in Type 1 Gaucher's Disease
- Gender Differences in C-Reactive Protein Concentrations - Confirmation with Two Sensitive Methods
- Serum Cholinesterase Activity in Patients with Burns
- Serum Lipids and Apolipoproteins in Patients with Psoriasis
- Reference Intervals for a Complete Blood Count Determined on different Automated Haematology Analysers: Abx Pentra 120 Retic, Coulter Gen-S, Sysmex SE 9500, Abbott Cell Dyn 4000 and Bayer Advia 120
- Science, Alchemy and Light: Paintings by Joseph Wright of Derby
- Approved IFCC Reference Method for the Measurement of HbA1c in Human Blood
- Meetings and Awards
