Effect of constant temperatures, darkness and light on the secretion of melatonin by pineal explants and retinas in the gecko Christinus marmoratus.
Brain Res
; 675(1-2): 345-8, 1995 Mar 27.
Article
em En
| MEDLINE
| ID: mdl-7796151
ABSTRACT
The effects of temperature and lighting conditions on the secretion of melatonin by the pineal organ of the nocturnal gecko Christinus marmoratus was studied using in vitro perifusion. In a 12L12D lighting regime, a high-amplitude melatonin rhythm was detectable at a constant temperature of 20 and 30 degrees C but not at 10 or 37 degrees C. There were sustained high levels of melatonin in constant darkness and sustained low levels in constant light. No retinal melatonin was detected using static and perifusion culture techniques. These results show that the pineal organ of C. marmoratus maintains light sensitivity in vitro but does not contain an oscillator coupled to the melatonin synthetic pathway.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Glândula Pineal
/
Retina
/
Temperatura
/
Escuridão
/
Luz
/
Lagartos
/
Melatonina
Limite:
Animals
Idioma:
En
Revista:
Brain Res
Ano de publicação:
1995
Tipo de documento:
Article
País de afiliação:
Austrália