Oxidative stress is thought to play an important role in the pathogenesis of disorders associated with atherosclerosis. Alpha-tocopherol is considered to be an effective lipophilic antioxidant, which protects lipid membranes against peroxidation and thus prevents cell damage by reaction with free radicals. However, measurement of alpha-tocopherol concentration in serum does not reflect the content of α-tocopherol in membranes whereas erythrocyte alpha-tocopherol may be good indicator of antioxidative status. Therefore a simple isocratic reversed phase HPLC method has been developed and validated for the determination of alpha-tocopherol in human erythrocytes in a clinical setting. The content of alpha-tocopherol in human erythrocyte membrane and lipoperoxidation were studied in patients with severe hypercholesterolemia treated by lipoprotein apheresis. The group of hypercholesterolemic patients (n = 14) treated by lipoprotein apheresis was compared to healthy adult normolipidemic controls. After lipoprotein apheresis, the content of in membrane alpha-tocopherol did not change significantly despite decreased tocopherol in serum and lipoprotein fractions. We observed significantly decreased lipoperoxidation as revealed by serum TBARS, representing end products of lipid peroxidation, which increased from third day afterwards and remained significantly higher in comparison to controls until the next LDL-apheresis. We conclude that aggressive lipid lowering procedure with lipoprotein apheresis was associated with favorable transient decrease of lipoperoxidation. Simultaneously the cell membrane bound antioxidative defense mechanisms as reflected by the content of alpha-tocopherol in human erythrocyte membrane where not depressed in spite of its decreased plasma lipid carrier. Another variables involved remain to be investigated.
- MeSH
- alfa-tokoferol krev MeSH
- antioxidancia metabolismus MeSH
- biologické markery krev MeSH
- časové faktory MeSH
- chromatografie s reverzní fází MeSH
- dospělí MeSH
- erytrocytární membrána metabolismus MeSH
- hyperlipoproteinemie typ II krev diagnóza terapie MeSH
- látky reagující s kyselinou thiobarbiturovou metabolismus MeSH
- lidé středního věku MeSH
- lidé MeSH
- lipoproteiny krev MeSH
- oxidační stres * MeSH
- peroxidace lipidů MeSH
- senioři MeSH
- separace krevních složek metody MeSH
- studie případů a kontrol MeSH
- výsledek terapie MeSH
- vysokoúčinná kapalinová chromatografie MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- Publikační typ
- abstrakt z konference MeSH
- MeSH
- aktivace makrofágů MeSH
- C-reaktivní protein diagnostické užití MeSH
- cévní endotel patofyziologie MeSH
- chemokin CCL2 diagnostické užití MeSH
- finanční podpora výzkumu jako téma MeSH
- hyperlipidemie terapie MeSH
- kohortové studie MeSH
- lidé MeSH
- ligand CD40 diagnostické užití MeSH
- neopterin diagnostické užití krev MeSH
- selektiny diagnostické užití klasifikace MeSH
- separace krevních složek MeSH
- Check Tag
- lidé MeSH
