Abstract
In a series of three experiments, we evaluated the degree to which the effects of acutely administered ethanol on aggressive behavior of male CFW mice toward a male intruder interact with, and depend on, androgen levels. In the first experiment, mice were tested at 15 min after 0, 0.1, 0.3, 1.0, 1.7, or 3.0 g/kg of ethanol PO. The highest dose (3.0 g/kg) significantly suppressed aggression by the male residents. In the second experiment, aggressive behavior was suppressed from 5 to 60 min after 3.0 g/kg ethanol administration PO. The third experiment evaluated the role of testosterone in these effects in another set of male mice that were castrated and then implanted with a 7.5-mm or 2.5-mm silastic capsule of testosterone (T) or a silastic capsule containing cholesterol as a control. The castrated mice with 2.5-mm T capsules or cholesterol capsules had lower baseline levels of aggression than intact mice or castrated males with 7.5-mm T capsules, but they demonstrated an alcohol dose-response pattern similar to that of the intact males. The castrated males with 7.5-mm T capsules had a different dose-response curve than the other males. Doses of 1.0 and 1.7 g/kg ethanol PO significantly enhanced aggression; 5.6 g/kg was required to suppress aggression. Ethanol effects on aggressive behavior did not require T or changes in T level, but T levels altered behavioral sensitivity to ethanol.
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DeBold, J.F., Miczek, K.A. Testosterone modulates the effects of ethanol on male mouse aggression. Psychopharmacology 86, 286–290 (1985). https://doi.org/10.1007/BF00432215
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DOI: https://doi.org/10.1007/BF00432215