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Increased urotensin I and II immunoreactivity in the urophysis of Gillichthys mirabilis transferred to low salinity water

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dc.contributor.author Larson, B. A. en_US
dc.contributor.author Madani, Z. en_US
dc.date.accessioned 2012-01-24T17:49:23Z
dc.date.available 2012-01-24T17:49:23Z
dc.date.issued 1991-09 en_US
dc.identifier 1936919 en_US
dc.identifier 0370735 en_US
dc.identifier.citation General and comparative endocrinology. 1991 Sep; 83(3): 379-87. en_US
dc.identifier.issn 0016-6480 en_US
dc.identifier.uri http://dx.doi.org/10.1016/0016-6480(91)90143-T
dc.identifier.uri http://hdl.handle.net/10057/4163
dc.description Click on the DOI link below to access the article (may not be free). en_US
dc.description.abstract The function of the fish caudal neurosecretory system is uncertain, but a role in osmoregulation has been suggested by many investigators. Our objective was to determine if acclimation to water of different salinity has an effect on immunoreactive patterns and staining intensities of the two caudal neuropeptides, urotensins I (UI) and II (UII), in Gillichthys mirabilis. Five fish, originally maintained in seawater, were transferred to deionized fresh water (FW), and five were transferred to new seawater (SW). After 24 hr spinal cords were removed and fixed, FW and SW spinal cords were paired in blocks to receive identical treatment, and cryostat sections were double immunostained for both peptides using a double sequential immunofluorescence procedure. FW spinal cord exhibited increased staining intensities for both UI and UII in their urophyses (the neurohemal organ) compared to the SW spinal cords. The magnitude of intensity difference appeared greater for UI than for UII. In addition, the FW urophyses had more loci displaying intense, perivascular UI immunoreactivity than the SW urophyses. Thus, it appears that environmental salinity has an effect on the urophysial content of UI and UII in this euryhaline fish. The increased immunoreactivity in FW fish could reflect increased synthesis and storage, decreased release of the stored peptides, or decreased peptide degradation. en_US
dc.language.iso eng en_US
dc.publisher Academic Press en_US
dc.relation.ispartofseries General and comparative endocrinology en_US
dc.source NLM en_US
dc.subject Comparative Study en_US
dc.subject Research Support, Non-U.S. Gov't en_US
dc.subject.mesh Adaptation, Physiological en_US
dc.subject.mesh Animals en_US
dc.subject.mesh Female en_US
dc.subject.mesh Fishes/physiology en_US
dc.subject.mesh Fresh Water en_US
dc.subject.mesh Immunoenzyme Techniques en_US
dc.subject.mesh Male en_US
dc.subject.mesh Neurons/metabolism en_US
dc.subject.mesh Seawater en_US
dc.subject.mesh Spinal Cord/anatomy & histology en_US
dc.subject.mesh Urotensins/analysis en_US
dc.subject.mesh Spinal Cord/metabolism en_US
dc.title Increased urotensin I and II immunoreactivity in the urophysis of Gillichthys mirabilis transferred to low salinity water en_US
dc.type Article en_US
dc.description.version peer reviewed en_US
dc.rights.holder Copyright © 1991, Elsevier en_US

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