Effect of oxytocin on transepithelial transport of water and Na+ in distinct ventral regions of frog skin (Rana catesbeiana)

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorBevevino, L. H.
dc.creatorProcopio, J.
dc.creatorSesso, A.
dc.creatorSanioto, SML
dc.date2014-05-20T15:27:50Z
dc.date2016-10-25T18:02:46Z
dc.date2014-05-20T15:27:50Z
dc.date2016-10-25T18:02:46Z
dc.date1996-06-01
dc.date.accessioned2017-04-06T00:04:14Z
dc.date.available2017-04-06T00:04:14Z
dc.identifierJournal of Comparative Physiology B-biochemical Systemic and Environmental Physiology. New York: Springer Verlag, v. 166, n. 2, p. 120-130, 1996.
dc.identifier0174-1578
dc.identifierhttp://hdl.handle.net/11449/37761
dc.identifierhttp://acervodigital.unesp.br/handle/11449/37761
dc.identifier10.1007/BF00301175
dc.identifierWOS:A1996UW72900005
dc.identifierhttp://dx.doi.org/10.1007/BF00301175
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/881013
dc.descriptionThoracic, abdominal, and pelvic fragments of ventral skin of Rana catesbeiana were analysed regarding the effect of oxytocin on: (1) transepithelial water transport; (2) short-circuit current, (3) skin conductance and electrical potential difference; (4) Na+ conductance, the electromotive force of the Nat transport mechanism, and shunt conductance; (5) short-circuit current responses to fast Na+ by K+ replacement in the outer compartment, and (6) epithelial microstructure. Unstimulated water and Na+ permeabilities were low along the ventral skin. Hydrosmotic and natriferic responses to oxytocin increased from thorax to pelvis, Unstimulated Na+ conductance was greater in pelvis than in abdomen, the other electrical parameters being essentially similar in both skin fragments. Contribution of shunt conductance to total skin conductance was higher in abdominal than in pelvic skin. Oxytocin-induced increases of total skin conductance, Na+ conductance, and shunt conductance in pelvis were significantly larger than in abdomen, An oscillatory behaviour of the short-circuit current was observed only in oxytocin-treated pelvic skins. Decrease of epithelial thickness and increase of mitochondria-rich cell number were observed from thorax to pelvis, Oxytocin-induced increases of interspaces were more conspicuous in pelvis and abdomen than in thorax.
dc.languageeng
dc.publisherSpringer
dc.relationJournal of Comparative Physiology B: Biochemical Systemic and Environmental Physiology
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectwater transport
dc.subjectsodium transport
dc.subjectoxytocin
dc.subjectsodium conductance
dc.subjectfrog skin
dc.titleEffect of oxytocin on transepithelial transport of water and Na+ in distinct ventral regions of frog skin (Rana catesbeiana)
dc.typeOtro


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