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Article: Effect of photic manipulation on the level of melatonin in the retinas of frogs (Rana tigrina regulosa)

TitleEffect of photic manipulation on the level of melatonin in the retinas of frogs (Rana tigrina regulosa)
Authors
Issue Date1985
PublisherAcademic Press. The Journal's web site is located at http://www.elsevier.com/locate/ygcen
Citation
General And Comparative Endocrinology, 1985, v. 58 n. 3, p. 464-470 How to Cite?
AbstractThe level of melatonin in the frog (Rana tigirina regulosa) retina was studied at midlight and middark in a 12L:12D cycle and under different lighting conditions. It was found that the frog displayed a diurnal rhythm of melatonin in the retina with high levels in the dark period. When the animal was subjected to an extended dark period, the level of retinal melatonin was significantly (P < 0.05) increased. In addition, the normal low level of retinal melatonin in the light period was significantly (P < 0.05) increased after dark treatment, and the normal high level of retinal melatonin in the dark period was significant (P < 0.05) lowered following light exposure. These results suggest that synthesis and secretion of melatonin in the frog retina is controlled by environmental lighting. This supports the hypothesis that melatonin plays an important role in the regulation of the photomechanical changes of eye pigmentation, an important element in the control of light sensitivity and acuity in the eyes of vertebrates. Moreover, these findings suggest that the photoreceptor may be a neuroendocrine or neurohumoral transducer which transduces the environmental lighting into neuroendocrine or neurohumoral secretion, melatonin.
Persistent Identifierhttp://hdl.handle.net/10722/171492
ISSN
2015 Impact Factor: 2.667
2015 SCImago Journal Rankings: 1.245
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorPang, SFen_US
dc.contributor.authorShiu, SYWen_US
dc.contributor.authorTse, SFen_US
dc.date.accessioned2012-10-30T06:15:25Z-
dc.date.available2012-10-30T06:15:25Z-
dc.date.issued1985en_US
dc.identifier.citationGeneral And Comparative Endocrinology, 1985, v. 58 n. 3, p. 464-470en_US
dc.identifier.issn0016-6480en_US
dc.identifier.urihttp://hdl.handle.net/10722/171492-
dc.description.abstractThe level of melatonin in the frog (Rana tigirina regulosa) retina was studied at midlight and middark in a 12L:12D cycle and under different lighting conditions. It was found that the frog displayed a diurnal rhythm of melatonin in the retina with high levels in the dark period. When the animal was subjected to an extended dark period, the level of retinal melatonin was significantly (P < 0.05) increased. In addition, the normal low level of retinal melatonin in the light period was significantly (P < 0.05) increased after dark treatment, and the normal high level of retinal melatonin in the dark period was significant (P < 0.05) lowered following light exposure. These results suggest that synthesis and secretion of melatonin in the frog retina is controlled by environmental lighting. This supports the hypothesis that melatonin plays an important role in the regulation of the photomechanical changes of eye pigmentation, an important element in the control of light sensitivity and acuity in the eyes of vertebrates. Moreover, these findings suggest that the photoreceptor may be a neuroendocrine or neurohumoral transducer which transduces the environmental lighting into neuroendocrine or neurohumoral secretion, melatonin.en_US
dc.languageengen_US
dc.publisherAcademic Press. The Journal's web site is located at http://www.elsevier.com/locate/ygcenen_US
dc.relation.ispartofGeneral and Comparative Endocrinologyen_US
dc.subject.meshAnimalsen_US
dc.subject.meshCircadian Rhythmen_US
dc.subject.meshDarknessen_US
dc.subject.meshLighten_US
dc.subject.meshMelatonin - Metabolismen_US
dc.subject.meshRanidaeen_US
dc.subject.meshRetina - Metabolism - Radiation Effectsen_US
dc.titleEffect of photic manipulation on the level of melatonin in the retinas of frogs (Rana tigrina regulosa)en_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.doi10.1016/0016-6480(85)90120-0-
dc.identifier.pmid4007481-
dc.identifier.scopuseid_2-s2.0-0021863809en_US
dc.identifier.volume58en_US
dc.identifier.issue3en_US
dc.identifier.spage464en_US
dc.identifier.epage470en_US
dc.identifier.isiWOS:A1985AHL5500016-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridPang, SF=7402528719en_US
dc.identifier.scopusauthoridShiu, SYW=7005550655en_US
dc.identifier.scopusauthoridTse, SF=7006643152en_US

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