Article (Scientific journals)
Rapid decreases in preoptic aromatase activity and brain monoamine concentrations after engaging in male sexual behavior
Cornil, Charlotte; Dalla, C.; Papadopoulou-Daifoti, Z. et al.
2005In Endocrinology, 146 (9), p. 3809-3820
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Abstract :
[en] In Japanese quail, as in rats, the expression of male sexual behavior over relatively long time periods (days to weeks) is dependent on the local production of estradiol in the preoptic area via the aromatization of testosterone. On a short-term basis (minutes to hours), central actions of dopamine as well as locally produced estrogens modulate behavioral expression. In rats, a view of and sexual interaction with a female increase dopamine release in the preoptic area. In quail, in vitro brain aromatase activity (AA) is rapidly modulated by calcium-dependent phosphorylations that are likely to occur in vivo as a result of changes in neurotransmitter activity. Furthermore, an acute estradiol injection rapidly stimulates copulation in quail, whereas a single injection of the aromatase inhibitor vorozole rapidly inhibits this behavior. We hypothesized that brain aromatase and dopaminergic activities are regulated in quail in association with the expression of male sexual behavior. Visual access as well as sexual interactions with a female produced a significant decrease in brain AA, which was maximal after 5 min. This expression of sexual behavior also resulted in a significant decrease in dopaminergic as well as serotonergic activity after 1 min, which returned to basal levels after 5 min. These results demonstrate for the first time that AA is rapidly modulated in vivo in parallel with changes in dopamine activity. Sexual interactions with the female decreased aromatase and dopamine activities. These data challenge established views about the causal relationships among dopamine, estrogen action, and male sexual behavior.
Disciplines :
Neurosciences & behavior
Endocrinology, metabolism & nutrition
Author, co-author :
Cornil, Charlotte  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biologie de la différenciation sexuelle du cerveau
Dalla, C.
Papadopoulou-Daifoti, Z.
Baillien, M.
Dejace, C.
Ball, G. F.
Balthazart, Jacques  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biologie de la différenciation sexuelle du cerveau
Language :
English
Title :
Rapid decreases in preoptic aromatase activity and brain monoamine concentrations after engaging in male sexual behavior
Publication date :
September 2005
Journal title :
Endocrinology
ISSN :
0013-7227
eISSN :
1945-7170
Publisher :
Endocrine Soc, Chevy Chase, United States - Maryland
Volume :
146
Issue :
9
Pages :
3809-3820
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 20 April 2009

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