Genetic variability in melatonin secretion originates in the number of pinealocytes in sheep

Genetic variability in plasma melatonin concentrations in ewes results from variations in pineal weight. This study investigated whether it is due to a difference in the number of pinealocytes, or in their size. Two groups of lambs were assigned before birth to being extremes (18 High and 21 Low) by...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Journal of endocrinology 2002-02, Vol.172 (2), p.397-404
Hauptverfasser:	Gomez Brunet, A, Malpaux, B, Daveau, A, Taragnat, C, Chemineau, P
Format:	Artikel
Sprache:	eng
Schlagworte:	Analysis of Variance Animals Animals, Newborn - anatomy & histology Animals, Newborn - genetics Animals, Newborn - physiology Biological and medical sciences Brain - anatomy & histology Breeding Cell Count Cell Size Computer Science Female Hypothalamus - anatomy & histology Life Sciences Melatonin - blood Melatonin - metabolism Organ Size - genetics Pineal Gland - cytology Pituitary Gland - anatomy & histology Sheep - anatomy & histology Sheep - genetics Sheep - physiology
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Genetic variability in plasma melatonin concentrations in ewes results from variations in pineal weight. This study investigated whether it is due to a difference in the number of pinealocytes, or in their size. Two groups of lambs were assigned before birth to being extremes (18 High and 21 Low) by calculating their genetic value on the basis of the melatonin concentrations of their parents. Lambs were bled from 1 week of age until 14 weeks of age. Pineal gland, brain and pituitary weights, length and width of the brain, and length of the hypothalamus were recorded. A significant effect (ANOVA) of genetic group (P
ISSN:	0022-0795 1479-6805
DOI:	10.1677/joe.0.1720397