Evaluation of the effects of weak and moderate static magnetic fields on the characteristics of human low density lipoprotein in vitro.
It has been suggested that exposure to electromagnetic fields may be a risk factor for cardiovascular disease in humans. Low density lipoprotein (LDL) modifications such as peroxidation and aggregation have been implicated in the pathogenesis of atherosclerosis. The present study investigated the effects of weak (0.125-0.5 mT) and moderate (1-4 mT) static magnetic fields (SMFs) on LDL oxidation, aggregation and zeta potential in vitro. Our results demonstrated that magnetic flux densities of 0.25 and 0.5 mT decreased, and magnetic flux densities of 3 and 4 mT increased the zeta potential and LDL oxidation in comparison with the control samples. All doses of SMFs increased the LDL aggregation in a time- and dose-dependent manner. It is concluded that SMFs can alter the susceptibility of LDL to oxidation and this alteration is dependent on the applied magnetic flux density. The SMF, in addition to its role in the production and stabilization of free radicals and promotion of lipid peroxidation, may influence the metabolism of lipoproteins and their interaction with other molecules such as apolipoproteins, enzymes and receptors through the alteration of the LDL zeta potential and its particles tendency to aggregation.
Plasma Physics Research Center, Sciences and Research Branch, Islamic Azad University, Tehran, Iran. abdi.soheila@gmail.com
Soheila
S
Abdi
Davoud
D
Dorranian
Amirnader Emami
AE
Razavi
Gholam Ali
GA
Naderi
Maryam
M
Boshtam
Mahmoud
M
Ghorannevis
D004307:Dose-Response Relationship, Radiation; D004563:Electrochemistry; D004574:Electromagnetic Fields; D024202:Electrophoretic Mobility Shift Assay; D006801:Humans; D015227:Lipid Peroxidation / Q000528:radiation effects; D008077:Lipoproteins, LDL / Q000737:chemistry / Q000528:radiation effects*; D060526:Magnetic Fields; D015394:Molecular Structure; D013053:Spectrophotometry / Q000379:methods; D013997:Time Factors
D008077:Lipoproteins, LDL; C099252:oxidized low density lipoprotein