Differential responses to distinct psychotropic agents of selectively bred dominant and submissive animals

Behav Brain Res. 2013 Jan 1;236(1):225-235. doi: 10.1016/j.bbr.2012.08.040. Epub 2012 Sep 7.

Abstract

Dominance and submissiveness are two opposite poles of behavior representing important functional elements in the development of social interactions. We previously demonstrated the inheritability of these traits by selective breeding based upon the dominant-submissive relationships (DSR) food competition paradigm. Continued multigenerational behavioral selection of Sabra mice yielded animal populations with strong and stable features of dominance and submissiveness. We found that these animals react differentially to stressogenic triggers, antidepressants and mood stabilizing agents. The anxiolytic compound diazepam (1.5mg/kg, i.p.) reduced anxiety-like behavior of submissive animals, but showed anxiogenic effects among dominant animals. In the Forced Swim test, the antidepressant paroxetine (1, 3 and 10mg/kg, i.p.) markedly reduced immobility of submissive animals, demonstrating antidepressant-like effect. In contrast, when administered to dominant animals, paroxetine caused extreme (frenetic) activity. The mood stabilizer lithium (0.4%, p.o.) selectively influenced dominant mice, without affecting the behavior of submissive animals. In summary, we describe here two distinct animal populations possessing strong dominant and submissive phenotypes. We suggest that these populations hold potential as tools for studying the molecular basis and pharmacogenetics of dominant and submissive behavior.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aggression / physiology
  • Analysis of Variance
  • Animals
  • Antimanic Agents / pharmacology
  • Anxiety / genetics
  • Anxiety / psychology
  • Behavior, Animal / physiology*
  • Diazepam / pharmacology
  • Dominance-Subordination*
  • Drinking / drug effects
  • Hypnotics and Sedatives / pharmacology
  • Lithium Chloride / pharmacology
  • Male
  • Mice
  • Mice, Inbred BALB C
  • Mice, Inbred C57BL
  • Mice, Inbred ICR
  • Motor Activity / physiology
  • Paroxetine / pharmacology
  • Psychotropic Drugs / pharmacology*
  • Serotonin Uptake Inhibitors / pharmacology
  • Swimming / psychology

Substances

  • Antimanic Agents
  • Hypnotics and Sedatives
  • Psychotropic Drugs
  • Serotonin Uptake Inhibitors
  • Paroxetine
  • Lithium Chloride
  • Diazepam