Letter to the editor (Scientific journals)
Rapid effects of aromatase inhibition on male reproductive behaviors in Japanese quail
Cornil, Charlotte; Taziaux, Mélanie; Baillien, M. et al.
2006In Hormones and Behavior, 49 (1), p. 45-67
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Keywords :
non-genomic effects; vorozole; consummatory sexual behavior; appetitive sexual behavior; rhythmic cloacal sphincter movements; meta-analysis
Abstract :
[en] Non-genomic effects of steroid hormones on cell physiology have been reported in the brain. However, relatively little is known about the behavioral significance of these actions. Male sexual behavior is activated by testosterone partly through its conversion to estradiol via the enzyme aromatase in the preoptic area (POA). Brain aromatase activity (AA) changes rapidly which might in turn be important for the rapid regulation of behavior. Here, acute effects of Vorozole (TM), an aromatase inhibitor, injected IP at different doses and times before testing (between 15 and 60 min), were assessed on male sexual behavior in quail. To limit the risk of committing both types of statistical errors (I and II), data of all experiments were entered into a meta-analysis. Vorozole (TM) significantly inhibited mount attempts (P < 0.05, size effect [g] = 0.527) and increased the latency to first copulation (P < 0.05, g = 0.251). The treatment had no effect on the other measures of copulatory behavior. Vorozole (TM) also inhibited appetitive sexual behavior measured by the social proximity response (P < 0.05, g = 0.534) or rhythmic cloacal sphincter movements (P < 0.001, g = 0.408). Behavioral inhibitions always reached a maximum at 30 min. Another aromatase inhibitor, androstatrienedione, induced a similar rapid inhibition of sphincter movements. Radioenzyme assays demonstrated that within 30 min Vorozole (TM) had reached the POA and completely blocked AA measured in homogenates. When added to the extracellular milieu, Vorozole (TM) also blocked within 5 min the AA in POA explants maintained in vitro. Together, these data demonstrate that aromatase inhibition rapidly decreases both consummatory and appetitive aspects of male sexual behavior. (c) 2005 Elsevier Inc. All rights reserved.
Disciplines :
Endocrinology, metabolism & nutrition
Neurosciences & behavior
Author, co-author :
Cornil, Charlotte  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biologie de la différenciation sexuelle du cerveau
Taziaux, Mélanie ;  Université de Liège - ULiège > CNCM/ Centre fac. de rech. en neurobiologie cell. et moléc.
Baillien, M.
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 effects of aromatase inhibition on male reproductive behaviors in Japanese quail
Publication date :
January 2006
Journal title :
Hormones and Behavior
ISSN :
0018-506X
eISSN :
1095-6867
Publisher :
Academic Press Inc Elsevier Science, San Diego, United States - California
Volume :
49
Issue :
1
Pages :
45-67
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 13 April 2009

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