Effect of zinc deficiency on memory, oxidative stress and blood chemistry in rats

The effect of zinc deficiency on memory function, oxidative stress and blood chemistry in rats was investigated. Forty-two male (65.0±2.78 g) albino Sprague Dawley rats were equally divided into 3 groups, A, B and C. The 3 groups of rats were fed zinc deficient diet, zinc adequate diet and reference diet, respectively, and water ad libitum daily for 30 days. Body weight, feed and water intake of the rats were computed every day. A shuttle box was used for the short-term and long-term memory tests of these rats fed the respective diets. Two criteria were considered as behavioural test; these include latency in entering dark chamber and timespent in the light chamber before entering the dark chamber at days 2, 9, 16 and 23 after the first day of training using the shuttle box. After the memory testing was conducted, rats were sacrificed by decapitation, blood was taken and brain excised. Total brain protein, plasma creatinine, reduced glutathione (GSH) levels, specific activities of acetylcholinesterase, superoxide dismutase (SOD), aspartate aminotransferase (AST), alanineaminotransferase (ALT) and alkaline phosphatase (ALP) were determined. The control diet supported significantly (