Regular ArticlePurification and Characterization of Urotensin II from the Brain of a Teleost (Trout, Oncorhynchus mykiss) and an Elasmobranch (Skate, Raja rhina)
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Ancient fishes and the functional evolution of the corticosteroid stress response in vertebrates
2021, Comparative Biochemistry and Physiology -Part A : Molecular and Integrative PhysiologyCitation Excerpt :Thus, CRF remains to be unequivocally identified in elasmobranchs; however, the definitive presence of this neurohormone in agnathan, holocephalan, and chondrostean fishes strongly suggests its presence (Cardoso et al., 2016). Further support for the presence of CRF in elasmobranchs was demonstrated in the lesser spotted dogfish, where administration of human CRF resulted in an increase in circulating levels of 1α-hydroxycorticosterone (1α-OH-B; Conlon, Armour, and Hazon unpublished; see Waugh and Conlon, 1993), the primary corticosteroid in chondrichthyans (Idler and Truscott, 1966). Elasmobranchs also exhibit both a pituitary portal system and direct innervation of their anterior pituitary (Meurling, 1967a, 1967b).
Effects of peripherally administered urotensin II and arginine vasotocin on the QT interval of the electrocardiogram in trout
2016, Comparative Biochemistry and Physiology Part - C: Toxicology and PharmacologyCitation Excerpt :Urotensin II (UII) is a cyclic, 12-amino acid neuropeptide that was originally isolated and purified from the caudal neurosecretory system of the teleost fish Gillichthys mirabilis (longjaw mudsucker) on the basis of its smooth muscle-stimulating activity (Pearson et al., 1980). UII is also present in the central nervous system (CNS) of teleosts (Waugh and Conlon, 1993) and the UII receptor (UT) is strongly expressed in the caudal neurosecretory system, the CNS (brain and spinal cord) as well as in various peripheral tissues including the gill, kidney, ovary and heart (Lu et al., 2006; Evans et al., 2011; Sun et al., 2014). Interestingly, in this latter organ, pioneer studies in the goldfish Carassius auratus revealed a high density of specific binding sites for 125I-labeled goby UII (Lederis, 1984).
Endocrine Systems in Elasmobranchs
2015, Fish PhysiologyImpact of gene/genome duplications on the evolution of the urotensin II and somatostatin families
2012, General and Comparative EndocrinologyThe endocrinology of 1α-hydroxycorticosterone in elasmobranch fish: A review
2012, Comparative Biochemistry and Physiology - A Molecular and Integrative PhysiologyCitation Excerpt :Further, CRF belongs to a family of peptides that includes the urotensins, urotensin I (UI) and urotensin II (UII) (Lovejoy and Balment, 1999). Both these peptides have been isolated and sequenced from the caudal neurosecretory system of elasmobranchs (Conlon et al., 1992; Waugh et al., 1995) and UII has been identified in the brain of the longnose skate, Raja rhina (Waugh and Conlon, 1993). In teleost fish the stimulatory actions of UI on ACTH release have been described (Bernier et al., 2009).
Characterization of the true ortholog of the urotensin II-related peptide (URP) gene in teleosts
2012, General and Comparative EndocrinologyCitation Excerpt :The occurrence of four UII/URP genes in teleosts indicates that all these genes were also already present in the ancestor of jawed vertebrates. In cartilaginous fish, only UII in dogfish [3] and skate [35], and URP1 in elephant shark [22] have been identified so far. Whether the two other paralogous genes also exist in these species remains to be established.