several other neuropeptides ( met-enkephalin , cholecystokinin-8 , thyrotropin releasing hormone , substance p and d-arg9-nt ) , at doses equimolar to 30 micrograms of nt , did not affect dopamine metabolites , whereas certain others ( beta-endorphin and bombesin ) increased their concentration in some brain areas .
C0086045
concentration
C0006104
brain