Linked Life Data

2338608

Source:http://linkedlifedata.com/resource/pubmed/id/2338608

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1990-6-20
pubmed:abstractText
"Synaptic" ribbons and spherules are typical organelles of the mammalian pinealocytes, that present quantitative day-night variations parallel to pineal melatonin levels. The European hamster is a wild photoperiodic mammal whose pineal melatonin concentrations do not vary during the 24 hr light-dark cycle. The aim of this study was thus to see if a rhythmic variation in synaptic structures was nevertheless present in this species. It was found that, in contrast to all of the photoperiodic species studied to date, the European hamster pinealocyte contains no ribbons, and virtually no spherules. Moreover, constant administration of melatonin does not result in the occurrence of these organelles; nevertheless, the pinealocytes have the potentiality to produce spherules and, to a lesser extent, ribbons, as they are observed in ganglionectomized animals and in the deep pineal of some hamsters after ablation of the superficial part of the gland. The formation of pineal synaptic structures, normally lacking in the European hamster, thus seems directly related to the noradrenergic innervation of the gland.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0742-3098
pubmed:author
pubmed:issnType
Print
pubmed:volume
8
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1-10
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
"Synaptic" ribbons and spherules lacking in the pineal gland of the European hamster appear after ganglionectomy.
pubmed:affiliation
CNRS-URA 1332, Université Louis Pasteur, Strasbourg, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't