Endocrine Abstracts

Growth hormone-releasing hormone (GHRH) and pituitary adenylate cyclase-activating polypeptide (PACAP) belong to the same superfamily of regulatory neuropeptides which also comprises VIP, glucagon, secretin and GIP. Both GHRH and PACAP have been characterized on the basis of their hypophysiotropic activities. In the course of vertebrate evolution, the primary structure of GHRH has markedly diverged while the sequence of PACAP has been remarkably well preserved. In mammals, GHR...