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Effects of aldehydes on CD36 expression.
M Viana1, L Villacorta, B Bonet
1Facultad de Ciencias Experimentales y de la Salud, Universidad San Pablo-CEU, Madrid, Spain. mviana@ceu.es
Free Radical Research
|August 10, 2005
Summary
Oxidized sunflower oil aldehydes increase CD36 scavenger receptor expression in monocytes. Alpha-tocopherol partially reduces this effect, offering potential insights into atherosclerosis development and dietary interventions.
Area of Science:
- Biochemistry
- Cell Biology
- Nutritional Science
Background:
- Lipid peroxidation during oil frying generates compounds that can alter gene expression and cellular behavior.
- Oxidized low-density lipoprotein (LDL) uptake, crucial for atherosclerosis, is mediated by the CD36 scavenger receptor.
- Alpha-tocopherol is known to down-regulate CD36 scavenger receptor expression.
Purpose of the Study:
- To investigate the impact of water-soluble aldehydes from oxidized sunflower oil on CD36 scavenger receptor expression in human monocytes (THP-1 cells).
- To evaluate the modulatory effect of alpha-tocopherol on CD36 expression in the presence of these aldehydes.
Main Methods:
- Water-soluble aldehydes were isolated from thermally oxidized sunflower oil.
- THP-1 monocytes were exposed to varying concentrations of these aldehydes, with or without alpha-tocopherol.
- CD36 expression was quantified using fluorescence-activated cell sorting (FACS).
Main Results:
- Incubation with water-soluble aldehydes led to a dose-dependent increase in CD36 protein expression on monocyte surfaces.
- Simultaneous treatment with alpha-tocopherol significantly reduced the aldehyde-induced CD36 expression.
Conclusions:
- Water-soluble aldehydes from oxidized culinary oil enhance CD36 scavenger receptor expression.
- Alpha-tocopherol partially mitigates the increase in CD36 expression induced by these aldehydes.