Estrogen masculinizes neural pathways and sex-specific behaviors

Wu, M. V., Manoli, D. S., Fraser, E. J., Coats, J. K., Tollkuhn, J., Honda, S., Harada, N., Shah, N. M. (October 2009) Estrogen masculinizes neural pathways and sex-specific behaviors. Cell, 139 (1). pp. 61-72. ISSN 1097-4172 (Electronic)0092-8674 (Linking)

DOI: 10.1016/j.cell.2009.07.036


Sex hormones are essential for neural circuit development and sex-specific behaviors. Male behaviors require both testosterone and estrogen, but it is unclear how the two hormonal pathways intersect. Circulating testosterone activates the androgen receptor (AR) and is also converted into estrogen in the brain via aromatase. We demonstrate extensive sexual dimorphism in the number and projections of aromatase-expressing neurons. The masculinization of these cells is independent of AR but can be induced in females by either testosterone or estrogen, indicating a role for aromatase in sexual differentiation of these neurons. We provide evidence suggesting that aromatase is also important in activating male-specific aggression and urine marking because these behaviors can be elicited by testosterone in males mutant for AR and in females subjected to neonatal estrogen exposure. Our results suggest that aromatization of testosterone into estrogen is important for the development and activation of neural circuits that control male territorial behaviors.

Item Type: Paper
Uncontrolled Keywords: Animals Animals, Newborn Aromatase/metabolism Brain/ metabolism Cell Survival Estrogens/biosynthesis/ metabolism Female Male Mice Neural Pathways Neurons/metabolism Receptors, Androgen/metabolism Sex Characteristics Sexual Behavior, Animal Territoriality
Subjects: organism description > animal behavior
bioinformatics > genomics and proteomics > small molecules > estrogen
organs, tissues, organelles, cell types and functions > tissues types and functions > neural networks
organism description > animal behavior > sex behaviors
CSHL Authors:
Communities: CSHL labs > Tollkuhn lab
Depositing User: Matt Covey
Date: 2 October 2009
Date Deposited: 23 Jul 2015 19:52
Last Modified: 23 Jul 2015 19:52
PMCID: PMC2851224
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