Use of different precursors of fatty acid biosynthesis in the brain in chronic hyperphenylalaninemia

: The incorporation of 14C from 2-14C-acetate, 1-6-14C-glucose and 5-14-C-glutamate into fatty acids of brain lipids under chronic hyperphenylalaninemia (HPA) was investigated. A decrease of lipogenesis intensity was demonstrated in young rat brain. In the HPA a decrease in the labelling of fatty acids occurred due to inhibition of the enzymes of fatty acid biosynthesis and to disturbance of metabolic pathways involved in lipogenesis via acentyl-CoA.