Journal
NUTRITION
Volume 16, Issue 11-12, Pages 1079-1081Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/S0899-9007(00)00446-9
Keywords
antioxidants; pycnogenol; malondialdehyde; free radicals
Categories
Ask authors/readers for more resources
To determine whether commonly used antioxidants alter malondialdehyde (MDA) modification of proteins, a known mechanism of free radical-related tissue injury, ie studied the effect of adding 1 mg/ml of pycnogenol, 5 mM of alpha -tocopherol, 5 mM of ascorbate, and 0.2 mg/mL of an ethanol equivalent of red and white wine on MDA-protein content of endothelial cells in culture. The addition of pycnogenol but not of the other antioxidants was associated with significant reduction in MDA-protein content compared with controls (0.521 +/- 0.041 in arbritrary units versus 1.011 +/- 0.021, P < 0.001). To determine whether the observed effect occurs distal to MDA generation, the effect of these antioxidants on the modification of bovine:serum albumin with MDA generated in a cell-free system was studied. In this cell-free assay, pycnogenol but not the other antioxidants reduced MDA-BSA generation by approximately 50%. It is concluded that pycnogenol may reduce MDA modification of proteins at a step distal to MDA generation. This may be an additional mechanism of protective effects of pycnogenol against oxidative stress. (C) Elsevier Science Inc. 2000.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available