the effect of des-tyr1-gamma-endorphin ( beta-lph62-77 , dt gamma e ) and des-tyr1-alpha-endorphin ( beta-lph62-76 , dt alpha e ) , administered intracerebroventricularly ( icv ) in doses of 0.01 , 0.1 , 1 and 10 micrograms , was studied on the alpha-methyl-p-tyrosine- ( alpha-mpt ) induced disappearance of catecholamines in a number of microdissected rat brain regions , which were selected on the basis of the neuroanatomy of the dopamine systems in the brain and of previous observations .
C0007412
catecholamines
C0013030
dopamine