Document Detail

Circadian information and messages in the modified photoreceptor cells of the avian pineal organ: retrospect and prospect.
MedLine Citation:
PMID:  6587289     Owner:  NLM     Status:  MEDLINE    
The modified photoreceptor cell (MP), homologous to the cone-like photoreceptor, is the principal cell type of the avian pineal organ. Two types of secretions (indoles and specific proteins-- pinealins ) are produced in this polarized cell. The synthesis of indoles undergoes striking circadian and circannual changes. MP appear to be receptoneuroendocrine cells which transduce circadian information into 5- methoxyindolic (melatonin, 5-methoxytryptophol, 5-methoxytryptamine) and possibly peptidic neurohormones. Taking into account different stages of differentiation and/or different physiological states (due to cyclic changes) for MP, several mechanisms of transduction of photoperiodic inputs into circadian hormonal outputs have been hypothesized.
J P Collin; M T Juillard; P Voisin
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ophthalmic research     Volume:  16     ISSN:  0030-3747     ISO Abbreviation:  Ophthalmic Res.     Publication Date:  1984  
Date Detail:
Created Date:  1984-07-09     Completed Date:  1984-07-09     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0267442     Medline TA:  Ophthalmic Res     Country:  SWITZERLAND    
Other Details:
Languages:  eng     Pagination:  107-13     Citation Subset:  IM    
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MeSH Terms
5-Methoxytryptamine / biosynthesis
Circadian Rhythm*
Indoles / biosynthesis
Melatonin / biosynthesis
Peptide Biosynthesis
Photoreceptor Cells / metabolism*
Pineal Gland / metabolism*
Reg. No./Substance:
0/Indoles; 0/Peptides; 0/polypeptide pineal extract; 608-07-1/5-Methoxytryptamine; 712-09-4/methoxytryptophol; 73-31-4/Melatonin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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