Reference : Preoptic Aromatase Cells Project to the Mesencephalic Central Gray in the Male Japanese ...
Scientific journals : Article
Life sciences : Zoology
Human health sciences : Endocrinology, metabolism & nutrition
Social & behavioral sciences, psychology : Neurosciences & behavior
http://hdl.handle.net/2268/11744
Preoptic Aromatase Cells Project to the Mesencephalic Central Gray in the Male Japanese Quail (Coturnix Japonica)
English
Absil, Philippe [Université de Liège - ULg > > Centre de recherches du cyclotron >]
Riters, L. V. [> > > >]
Balthazart, Jacques mailto [Université de Liège - ULg > Département des sciences biomédicales et précliniques > Biologie de la différenciation sexuelle du cerveau >]
Nov-2001
Hormones & Behavior
40
3
369-83
Yes (verified by ORBi)
International
0018-506X
[en] Previous tract-tracing studies demonstrated the existence of projections from the medial preoptic nucleus (POM) to the mesencephalic central gray (GCt) in quail. GCt contains a significant number of aromatase-immunoreactive (ARO-ir) fibers and punctate structures, but no ARO-ir cells are present in this region. The origin of the ARO-ir fibers of the GCt was investigated here by retrograde tract-tracing combined with immunocytochemistry for aromatase. Following injection of fluorescent microspheres in GCt, retrogradely labeled cells were found in a large number of hypothalamic and mesencephalic areas and in particular within the three main groups of ARO-ir cells located in the POM, the ventromedial nucleus of the hypothalamus, and the bed nucleus striae terminalis. Labeling of these cells for aromatase by immunocytochemistry demonstrated, however, that aromatase-positive retrogradely labeled cells are observed almost exclusively within the POM. Double-labeled cells were abundant in both the rostral and caudal parts of the POM and their number was apparently not affected by the location of the injection site within GCt. At both rostro-caudal levels of the POM, ARO-ir retrogradely labeled cells were, however, more frequent in the lateral than in the medial POM. These data indicate that ARO-ir neurons located in the lateral part of the POM may control the premotor aspects of male copulatory behavior through their projection to GCt and suggest that GCt activity could be affected by estrogens released from the terminals of these ARO-ir neurons.
http://hdl.handle.net/2268/11744
10.1006/hbeh.2001.1702

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