Pro-Adrenomedullin(153-185),human, (C143H224N42O43), a peptide with the sequence H2N-SLPEAGPGRTLVSSKPQAHGAPAPPSGSAPHFL-OH, MW= 3219.6. Adrenomedullin (AM) is a ubiquitously expressed peptide initially isolated from phaechromyctoma in 1993¹. AM was initially identified as a vasodilator, some have cited this as the most potent endogenous vasodilatory peptide found in the body². Differences in opinion regarding the ability of AM to relax vascular tone arises from the differences in the model system used³. Other effects of AM include increasing the tolerance of cells to oxidative stress and hypoxic injury and angiogenesis. AM is seen as a positive influence in diseases such as hypertension, myocardial infarction, chronic obstructive pulmonary disease and other cardiovascular diseases, whereas it can be seen as a negative factor in potentiating the potential of cancerous cells to extend their blood supply and cause cell proliferation.

References:
1.Kitamura K, Kato J, Kawamoto M, Tanaka M, Chino N, Kangawa K, et al. The intermediate form of glycine-extended adrenomedullin is the major circulating molecular form in human plasma. Biochem Biophys Res Commun 1998;244:551-555
2. Cockcroft et al., Br J Clin Pharmacol. 1997 Jul;44(1):57-60.
3. Hamid SA, Baxter GF, Pharmacol Ther. Feb;105(2):95-112.2005.