neurotensin

noun

neu·​ro·​ten·​sin -ˈten(t)-sən 

: a protein composed of 13 amino acid residues that causes hypotension and vasodilation and is present in the brain

Neurotensin acts as a neuromodulator in the brain and, in particular, as a modulator of dopamine transmission. … In the periphery, it acts as a paracrine and endocrine modulator of digestive functions …

—Danielle Gully et al., Proceedings of the National Academy of Sciences