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Human β‑Defensin 1 and β‑Defensin 3 (Mouse Ortholog mBD14) Function as Full Endogenous Agonists at Select Melanocortin Receptors

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journal contribution
posted on 26.03.2018, 00:00 by Mark D. Ericson, Anamika Singh, Srinivasa R. Tala, Erica M. Haslach, Marvin L. S. Dirain, Jay W. Schaub, Viktor Flores, Natalie Eick, Cody J. Lensing, Katie T. Freeman, Branden A. Smeester, Danielle N. Adank, Stacey L. Wilber, Robert Speth, Carrie Haskell-Luevano
β-Defensin 3 (BD3) was identified as a ligand for the melanocortin receptors (MCRs) in 2007, although the pharmacology activity of BD3 has not been clearly elucidated. Herein, it is demonstrated that human BD3 and mouse BD3 are full micromolar agonists at the MCRs. Furthermore, mouse β-defensin 1 (BD1) and human BD1 are also MCR micromolar agonists. This work identifies BD1 as an endogenous MCR ligand and clarifies the controversial role of BD3 as a micromolar agonist.