Adrenomedullin (AM) is a 52 amino acid peptide involved in the pathophysiology of several human diseases. Here we show the gene structure, organ distribution, and regulated expression of AM in monkey. The monkey AM (mAM) gene is located on the short arm of chromosome 9 and it codes for a 185 amino acid preprohormone, which contains two amidated peptides identical to the human AM and proadrenomedullin N-terminal 20 peptide. The promoter region of the mAM gene contains a variety of transcription factor binding motifs. mAM is widely expressed throughout many organs as shown by real-time PCR and immunohistochemical techniques, and we have found similar levels of circulating plasma AM in monkeys and humans. A significant upregulation of the mAM mRNA was observed in monkey cells exposed to low oxygen tension conditions, TGF-beta1, all-trans-retinoic acid, and dexamethasone. Our collective data show a high degree of homology between mAM and hAM, which renders the monkey an attractive animal model for future pharmacological and pre-clinical studies targeting AM.
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