gaba , baclofen , adenosine , atp , serotonin , norepinephrine , somatostatin , and dynorphin a inhibited the current through ca2+ channels in a substantial fraction of cells , while substance p , vasoactive intestinal polypeptide , [ d-ala2 , d-leu5 ] -enkephalin , cholecystokinin-8 ( sulfated ) , calcitonin gene-related peptide , angiotensin ii , neurotensin , vasopressin , and thyrotropin-releasing hormone had no effect .
C0016904
gaba
C0004609
baclofen