pamp 12

PAMP-12 (human, porcine) acetate (PAMP-12 (human, porcine) acetate (196305-05-2 free base)) , a major component of ir-PAMP, is processed from the AM precursor, as is PAMP-20, and may participate in cardiovascular control.

PAMP-12 (unmodified), an endogenous peptide and potent MRGPRX2 (MrgX2) agonist (EC50=20-50 nM), induces hypotension by inhibiting catecholamine release from sympathetic nerve endings and adrenal chromaffin cells [1].

PAMP-12 (unmodified) TFA, an endogenous peptide and potent MRGPRX2 (MrgX2) agonist (EC50=20-50 nM), induces hypotension by inhibiting catecholamine secretion from sympathetic nerve endings and adrenal chromaffin cells [1].

PAMP-12(human, porcine) TFA, a significant constituent of immunoreactive (ir)-PAMP, derives from the adrenomedullin precursor and functions as a potent hypotensive peptide involved in cardiovascular regulation [1].

Proadrenomedullin N-terminal 12 peptide (PAMP-12), an endogenous fragment originating from the adrenal medulla and spanning amino acids 9-20 of human PAMP-20, plays a role in causing hypotension. It functions as an agonist for the MAS-related G protein-coupled receptor family member X2 (MRGPRX2), inhibiting forskolin-stimulated cAMP accumulation in CHO cells expressing human MRGPRX2 (EC50 = 57.2 nM) and selectively prompting calcium mobilization in these cells (EC50 = 41 nM), but not in cells expressing MRGPRX1, MRGPRX3, or MRGPRX4 at 1 µM. As an antagonist of nicotinic acetylcholine receptors (nAChRs), PAMP-12 obstructs carbachol-triggered catecholamine release and the influx of calcium and sodium (IC50s = 1.3, 0.39, and 0.87 µM, respectively) in primary bovine adrenal chromaffin cells, with no effect on histamine-induced responses (IC50s = >1 µM for all). Additionally, it decreases mean arterial blood pressure in normotensive rats at doses ranging from 10 to 50 nmol/kg.

Potent endogenous peptide agonist of Mas related GPR X2 (MRGPRX2, EC50 = 57.2 nM). Corresponds to amino acids 9 to 20 of proadrenomedullin.