Guanylin and uroguanylin are newly discovered, related peptides that activate common guanylyl cyclase signaling molecules and via 3’,5’-guanosine cyclic monophosphate regulate the activity of a variety of tissues and organs. Additionally, the message for both peptides is expressed in a variety of tissues and organs, including the intestinal tract and kidney, and thus may serve as part of a functional endocrine axis linking these two major organ systems in fluid/volume homeostasis. This manuscript reviews the discovery and nature of the guanylin and uroguanylin peptides, their actions on the intestinal mucosa and kidney, the distribution and molecular biology of the guanylyl cyclase C receptor, and explores the future directions of this rapidly developing, expanding field of inquiry.

Keywords:
Guanylin, Uroguanylin, Guanylyl cyclase, Cyclic GMP
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© 1997 S. Karger AG, Basel
1997
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