Excitotoxin lesions suggest an aspartatergic projection from rat medial prefrontal cortex to ventral tegmental area

High affinity D-[3H]aspartate uptake and amino acid concentrations were examined in synaptosome-enriched preparations of microdissected rat ventral tegmental area 6-7 days following N-methyl-D-aspartate lesions confined to medial prefrontal cortex. Specific reductions were observed in the high affinity uptake of D-[3H]aspartate (59% of control, P less than 0.005) and concentrations of L-aspartate (79% of control, P less than 0.05) in the ventral tegmental area suggesting the presence of an aspartatergic projection from medial prefrontal cortex to this area.