while somatostatin , substance p , adrenocorticotropin ( acth ) , beta-endorphin , and nerve growth factor ( ngf ) did not show any effect on cyclic amp metabolism , isoproterenol ( ip ) , norepinephrine ( ne ) and epinephrine ( e ) also markedly elevated the schwann cell cyclic amp concentration .
C0028351
norepinephrine
C0014563
epinephrine