RESUMEN
The aim of this study is looking at the effects of olive, flaxseed, and sesame oils on, brain and serum cholesterol and triacylglycerol levels of hyperlipidemic male rats. In the first place oils were chemically analysed for fatty acid composition. Rats were then fed on a diet containing 10% of the oils for a period of 12 weeks apart from positive control group which fed on high fat diet. The rats were then decapitated; brains were removed, and weighed; blood was collected for analyses. Cholesterol and triacylglycerol levels in the serum of all animals received different dietary oils were decreased significantly [P=0.05] relative to the negative control group. On the other hand, brain cholesterol and triacylglycerol levels of all animals received the dietary oils were not significantly affected. Serum cholesterol level of the rats fed on olive oil was significantly lower than that of the other groups. Moreover, those fed on fiaxseed oil diet had the lowest level of triacylglycerol comparing with other groups. Furthermore, it is concluded that brain lipid levels of rats are not connected with serum levels that differently affected by various dietary oils. Histological results showed a marked to slight improvement of brain tissues responding to flaxseed oil, and olive oil respectively. But slight histopathological changes were noticed in sesame oil diet group