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Neuromedin U and its receptors: structure, function, and physiological roles
Paul J Brighton1, Philip G Szekeres, Gary B Willars
1Department of Cell Physiology and Pharmacology, Maurice Shock Medical Sciences Building, University of Leicester, University Road, Leicester, LE1 9HN United Kingdom.
Pharmacological Reviews
|June 1, 2004
Summary
Neuromedin U (NMU) is a conserved neuropeptide with diverse physiological roles. Its two newly discovered receptors suggest specific functions and potential therapeutic targets for NMU-related conditions.
Area of Science:
- Neuroendocrinology
- Molecular Biology
- Physiology
Background:
- Neuromedin U (NMU) is a highly conserved neuropeptide found widely in the body, particularly in the gut and pituitary.
- Its structure, especially the C-terminus, is crucial for bioactivity, indicating evolutionary importance.
- Despite its conservation and broad distribution, NMU's exact physiological and pathophysiological roles remain unclear.
Purpose of the Study:
- To detail the isolation and characterization of Neuromedin U (NMU).
- To describe the discovery, cloning, distribution, and structure of the two NMU receptors.
- To outline the potential roles of NMU in physiology and pathophysiology.
Main Methods:
- Isolation and sequencing of Neuromedin U (NMU) from various species.
- Cloning and characterization of two distinct G-protein-coupled receptors for NMU.
- Analysis of NMU and receptor distribution throughout the body.
Main Results:
- Neuromedin U (NMU) is structurally conserved across species, with critical activity at its C-terminus.
- Two G-protein-coupled receptors for NMU have been identified with differential tissue distribution.
- NMU has been implicated in smooth muscle contraction, blood pressure, gut function, stress, and feeding behavior.
Conclusions:
- The discovery of NMU receptors opens avenues for understanding its diverse functions.
- Further research with receptor-specific ligands and knockout models is needed to elucidate NMU's full biological roles.
- Targeting NMU receptors may offer novel therapeutic strategies for various conditions.