Le Greves P, Nyberg F, Terenius L, Hökfelt T
Eur J Pharmacol. 1985 Sep 24;115(2-3):309-11. doi: 10.1016/0014-2999(85)90706-x.
Calcitonin gene-related peptide (CGRP) was found to potently inhibit a substance P endopeptidase isolated from human CSF. CGRP potentiated substance P irritant actions; a possible mechanism is interaction for a common metabolic step. Somatostatin is another peptide capable of competing with substance P endopeptidase.