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Article: Cold exposure or norepinephrine injections altered melatonin levels in the quail retina

TitleCold exposure or norepinephrine injections altered melatonin levels in the quail retina
Authors
Issue Date1989
PublisherElsevier Ireland Ltd. The Journal's web site is located at http://www.elsevier.com/locate/neulet
Citation
Neuroscience Letters, 1989, v. 100 n. 1-3, p. 130-134 How to Cite?
AbstractThe possible involvement of ambient temperature and norepinephrine on daytime levels of retinal melatonin were investigated in quails. For a minimum of 1 week, experimental animals were housed under constant room temperature of 23 ± 2°C and a daily 12:12 h light-dark cycle with light on at 06.00-1800 h. The quails were then transferred to a cold room of 4°C and cold-exposed for 0, 30, 60, 90 and 120 min. Retina samples were subsequently collected at mid-light for melatonin radioimmunoassay. An initial decline of melatonin was detected in the cold treated birds after 30 min of exposure. Thereafter prolongation of cold stimulation produced significant increases in the levels of retinal melatonin. In the second experiment, intra-peritoneal norepinephrine injections (0, 1, 10 and 100 μg/bird) at mid-light were found to increase the levels of retinal melatonin in quails. We postulate the cold-induced increase of retinal melatonin may be attributed to an augmented level of catecholamines released as a general neuroendocrine response to temperature decrements.
Persistent Identifierhttp://hdl.handle.net/10722/171535
ISSN
2015 Impact Factor: 2.107
2015 SCImago Journal Rankings: 1.035
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLee, PPNen_US
dc.contributor.authorShiu, SYWen_US
dc.contributor.authorAllen, AEen_US
dc.contributor.authorPang, SFen_US
dc.date.accessioned2012-10-30T06:15:34Z-
dc.date.available2012-10-30T06:15:34Z-
dc.date.issued1989en_US
dc.identifier.citationNeuroscience Letters, 1989, v. 100 n. 1-3, p. 130-134en_US
dc.identifier.issn0304-3940en_US
dc.identifier.urihttp://hdl.handle.net/10722/171535-
dc.description.abstractThe possible involvement of ambient temperature and norepinephrine on daytime levels of retinal melatonin were investigated in quails. For a minimum of 1 week, experimental animals were housed under constant room temperature of 23 ± 2°C and a daily 12:12 h light-dark cycle with light on at 06.00-1800 h. The quails were then transferred to a cold room of 4°C and cold-exposed for 0, 30, 60, 90 and 120 min. Retina samples were subsequently collected at mid-light for melatonin radioimmunoassay. An initial decline of melatonin was detected in the cold treated birds after 30 min of exposure. Thereafter prolongation of cold stimulation produced significant increases in the levels of retinal melatonin. In the second experiment, intra-peritoneal norepinephrine injections (0, 1, 10 and 100 μg/bird) at mid-light were found to increase the levels of retinal melatonin in quails. We postulate the cold-induced increase of retinal melatonin may be attributed to an augmented level of catecholamines released as a general neuroendocrine response to temperature decrements.en_US
dc.languageengen_US
dc.publisherElsevier Ireland Ltd. The Journal's web site is located at http://www.elsevier.com/locate/neuleten_US
dc.relation.ispartofNeuroscience Lettersen_US
dc.subject.meshAnimalsen_US
dc.subject.meshBody Temperature Regulationen_US
dc.subject.meshCold Temperatureen_US
dc.subject.meshMelatonin - Metabolismen_US
dc.subject.meshNorepinephrine - Pharmacologyen_US
dc.subject.meshQuail - Metabolismen_US
dc.subject.meshRetina - Drug Effects - Metabolism - Physiologyen_US
dc.titleCold exposure or norepinephrine injections altered melatonin levels in the quail retinaen_US
dc.typeArticleen_US
dc.identifier.emailShiu, SYW:sywshiu@hkucc.hku.hken_US
dc.identifier.authorityShiu, SYW=rp00384en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/0304-3940(89)90672-1-
dc.identifier.pmid2761759-
dc.identifier.scopuseid_2-s2.0-0024514160en_US
dc.identifier.volume100en_US
dc.identifier.issue1-3en_US
dc.identifier.spage130en_US
dc.identifier.epage134en_US
dc.identifier.isiWOS:A1989U769300023-
dc.publisher.placeIrelanden_US
dc.identifier.scopusauthoridLee, PPN=7406119629en_US
dc.identifier.scopusauthoridShiu, SYW=7005550655en_US
dc.identifier.scopusauthoridAllen, AE=7402802774en_US
dc.identifier.scopusauthoridPang, SF=7402528719en_US

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