adrenomedullin , rat

Adrenomedullin (rat), a potent vasodilator peptide, is secreted by both endothelial cells (EC) and vascular smooth muscle cells (VSMC) [1].

Adrenomedullin 11-50 rat is a peptide fragment of adrenomedullin that possesses systemic vasodilator activity at the level of calcitonin gene-related peptide-1 (CGRP1) receptor activation. Adrenomedullin and its peptide may be used in bone growth studies.

Adrenomedullin (1-50), rat, is a 50 amino acid peptide that induces selective arterial vasodilation via activation of the CGRP1 receptor. This peptide hormone is expressed in rat adrenal glands, lung, kidney, heart, and spleen, as well as in the duodenum and submandibular glands.

Pro-Adrenomedullin (N-20), rat is a polypeptide molecule with the sequence ARLDTSSQFRKKWNKWALSR-NH2.

Adrenomedullin (22-52) is a C-terminal fragment of adrenomedullin (1-52) . In vitro, adrenomedullin (22-52) reduces basal corticosterone production in a mixture of rat adrenocortical and adrenomedulllary cells. It also reverses increases in ACTH-stimulated corticosterone production induced by adrenomedullin (1-52). Adrenomedulin (22-52) (0.5 and 5 μg/kg/min) has no effect on basal regional cerebral blood flow but reverses increases in regional cerebral blood flow induced by rat adrenomedullin in rats. Unlike adrenomedullin (1-52), adrenomedullin (22-52) has no effect on mesenteric arterial perfusion pressure in cats.

Adrenomedullin (13-52) is a truncated form of adrenomedullin (1-52) . It induces nitric oxide-dependent relaxation of and inhibits release of angiotensin II and endothelin-1 from isolated rat aorta. In vivo, adrenomedullin (13-52) decreases mean arterial pressure (MAP) in spontaneously and renal hypertensive rats in a dose-dependent manner. Adrenomedullin (13-52) (10-3,000 ng per animal) reverses increases in lobar arterial pressure induced by U-46619 in a dose-dependent manner in cats but has no effect on basal lobar arterial pressure or systemic arterial pressure. It also potentiates inflammatory edema and neutrophil accumulation in rats.

Adrenomedullin (16-31), human TFA, a fragment containing amino acid residues 16-31 of human adrenomedullin (hADM), demonstrates significant CGRP1 receptor affinity and exhibits pressor activity in the rat systemic vascular bed while lacking this effect in cats [1].

Adrenomedullin (porcine) is a vasodilatory peptide that elicits endothelium-dependent relaxation in rat aorta at an IC50 of 2.4 nM and also induces endothelium-independent relaxation in porcine coronary arteries, with an IC50 of 27.6 nM [1].