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Urotensin II: from osmoregulation in fish to cardiovascular regulation in man
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Urotensin II (U-II) is a cyclic peptide first isolated from the urophysis of the teleost fish Gillichthys mirabilis where it is involved in osmoregulation.1 The human isoform was identified in 1998,2 and 1 yr later its cognate Gq G-protein coupled receptor, UT (de-orphanized GPR14) was identified.3 Human U-II is composed of 11 amino acids and is cleaved from a larger precursor. An additional urotensin-related peptide has also been identified. Human UT is encoded on chromosome 17q25.3, is intronless, and is composed of 389 amino acids. There are several single nucleotide polymorphisms of both U-II and UT and their association with the range of cardiovascular disease phenotypes is largely undefined. The peptide and receptor show diverse distribution, including brain, respiratory system, heart, vasculature, and kidney. U-II is currently described
Department of Cardiovascular Science, Pharmacology and Therapeutics Group, Division of Anaesthesia, Critical Care and Pain Management, University of Leicester, LRI, Leicester, LE1 5WW, UK
E-mail: DGL3@le.ac.uk
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