Abstract：
:The 37-amino-acid calcitonin gene-related peptide (CGRP) occurs as a result of alternative processing of mRNA from the calcitonin gene. The potency of CGRP as a vasodilator and the occurrence of the peptide in nerves associated with blood vessels suggest an important role for CGRP in the regulation of blood flow. The finding that CGRP induces protracted vasodilatation when administered extra-vascularly, to mimic release from nerves, has led us to investigate how the vasodilator activity of CGRP is controlled in vivo. CGRP is often co-localized with substance P in C-fibre nerves. Here, we demonstrate that injection of CGRP with substance P into human skin converts the long-lasting vasodilatation induced by CGRP into a transient response. Experiments in animals reveal that the phenomenon is dependent on the action of proteases from mast cells stimulated by substance P. The results reveal a new regulatory interaction between two neuropeptides and provide evidence for an in vivo role for mast cell proteases.
journal_name
Naturejournal_title
Natureauthors
Brain SD,Williams TJdoi
10.1038/335073a0subject
Has Abstractpub_date
1988-09-01 00:00:00pages
73-5issue
6185eissn
0028-0836issn
1476-4687journal_volume
335pub_type
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