Gm. Bartoli et al., DIETARY FISH-OIL INHIBITS HUMAN ERYTHROCYTE MG,NAK-ATPASE, Biochemical and biophysical research communications, 213(3), 1995, pp. 881-887
The effects of long-term treatment with a high dose (7.7 g/day) of n-3
polyunsaturated fatty acids (PUFA) were studied for human red blood c
ells (RBCs). RBCs isolated from healthy subjects treated for 30 and 18
0 days with n-3 PUFA showed the following modifications: (1) a time de
pendent modification of membrane fatty acid composition with a concomi
tant increase in membrane lipid unsaturation; (2) an increase in lipid
peroxidation, expressed as malondialdehyde release, induced in vine b
y t-butyl hydroperoxide (t-BOOH); (3) a time-dependent decrease in sus
ceptibility to hemolysis, expressed as K+ leakage, induced in vitro by
t-BOOH; (4) a time -dependent decrease in total and ouabain-insensiti
ve Mg, NaK-ATPase activity. These results suggest that long term dieta
ry supplementation with high doses of n-3 PUFA significantly modifies
RBC structure and function that might lead to harmful side effects. (C
) 1995 Academic Press, Inc.