Abstract
Lipid peroxidation products and defenses against free radical damage were determined in serum of 55 patients with senile dementia of the Alzheimer type (SDAT) and compared with values in 24 age-matched healthy control subjects. The following parameters were evaluated: lipid-conjugated dienes and trienes, malondialdehyde, superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activity in erythrocytes, vitamins E, C and A, zinc, selenium and copper, ceruloplasmin, transferrin and albumin. The results showed a statistically significant decrease in the levels of GSH-Px, vitamins E, C and A, zinc, transferrin and albumin in the SDAT group. On the other hand, most of the deficiencies concern the malnourished subgroup of the SDAT population (SOD, GSH-Px, vitamins E and C, selenium, zinc, transferrin and albumin). Such an alteration of free radical scavengers in the malnourished subgroup of the SDAT population could combine the radical and nutritional hypothesis advanced by some authors.
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