Document Detail


Virtually same oxidizability of LDL but higher Lp(a) levels in arterial compared to venous plasma.
MedLine Citation:
PMID:  25240239     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Plaque formation is confined to the arterial trunk. We assumed that due to the higher aeration of arterial compared to venous blood, higher levels of the atherogenic agent oxidized LDL might be present in arteries, contributing to plaque formation. We aimed to compare (i) the basal oxidative status of LDL in arterial and venous blood and (ii) the susceptibility of arterial and venous LDL to oxidation. The basal oxidative status of LDL was determined by measuring lipid hydroperoxide (LPO) concentrations, plasma levels of auto-antibodies against oxidized LDL, and by measuring oxidation-specific epitopes on LDL particles. The oxidizability of arterial vs. venous LDL (catalyzed by copper) was estimated by monitoring the time-course of conjugated dienes formation. Interestingly, we found the same basal oxidative status of LDL in arterial and venous plasma. LPO concentrations and levels of auto-antibodies against oxidized LDL were similar in arterial and venous plasma and amounts of oxidation-specific epitopes were similar on the respective LDL particles. Moreover, we found similar susceptibilities of arterial and venous LDL to (copper-mediated) oxidation. Lag-times until the onset of conjugated diene formation were slightly shorter in arterial compared to venous LDL in the presence of 5μM, but not in the presence of 1μM CuCl2. Additionally, we found significantly higher levels of the atherogenic lipoprotein(a) in arterial plasma. We conclude that not higher oxidizability of arterial LDL but higher arterial lipoprotein(a) levels might help to explain why sclerosis is confined to the arterial trunk.
Authors:
Gerd Hoerl; Gerhard Ledinski; Gerd Kager; Michael Thalhammer; Martin Koestenberger; Guenther Juergens; Thomas Gary; Gerhard Cvirn
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-9-17
Journal Detail:
Title:  Chemistry and physics of lipids     Volume:  -     ISSN:  1873-2941     ISO Abbreviation:  Chem. Phys. Lipids     Publication Date:  2014 Sep 
Date Detail:
Created Date:  2014-9-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0067206     Medline TA:  Chem Phys Lipids     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014. Published by Elsevier Ireland Ltd.
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