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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Effect of calcitonin gene related peptide on the adenylate cyclase activity in abalone gill membranes.

The aim of the present study was to investigate and to compare the effect of calciotropic hormones, human calcitonin gene related peptide (CGRP) I and II, salmon calcitonin (CT) and human amylin on the adenylate cyclase activity in abalone gill membranes. In addition to human CGRPI, human CGRPII and salmon CT stimulated the adenylate cyclase activity. No effect was observed with amylin. The higher effect was observed with human CGRPI and II that induced a 160-170% increase of the enzyme activity. Fifty percent of the maximal activity was observed with 3 and 8 nM of CGRP I and II, respectively. Salmon CT induced a lower effect: the maximal activity was obtained with a hormone concentration of 266 nM and represented a 130% stimulation of the basal activity. In the presence of CGRP 8-37, a competitive antagonist of CGRP action, the stimulation observed with CGRPI was abolished and returned to the basal level.This study points out that, in invertebrates, CGRP receptors present in gill membranes are linked to an adenylate cyclase system similar to that described in vertebrates. In addition, these data are in favour of a role for CGRP in branchial function both in non-mammalian vertebrates and invertebrates[1]

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