Abstract
Estradiol (17 beta-estradiol, E-2) is a crucial estrogen hormone that regulates sexual, cognitive, social and affective behaviors in various species. However, complex central nervous system (CNS) effects of E-2, including its activity in males, remain poorly understood. The zebrafish (Danio rerio) is rapidly becoming a powerful novel model system in translational neuroscience research. Here, we evaluate the effects of a single 24-h exposure to 20 mu g/L of E-2 on behavioral and endocrine (cortisol) responses in adult male zebrafish. Overall, E-2 exerted pro-social effect in the social preference test, reduced whole-body cortisol levels, elevated exploration in the novel tank test and increased the shoal size in the shoaling test, indicative of an anxiolytic-like profile of this hormone in male zebrafish. Supporting mounting human and rodent evidence on the role of E-2 in behavioral regulation, the observed pro-social and anxiolytic-like effects of E-2 in male zebrafish reinforce the use of this aquatic organism in studying steroid-mediated CNS mechanisms of complex affective and social behaviors.
Original language | English |
---|---|
Article number | 135591 |
Number of pages | 8 |
Journal | Neuroscience Letters |
Volume | 747 |
DOIs | |
Publication status | Published - 16 Mar 2021 |
Keywords
- Anxiety
- Anxiety-like behavior
- Cortisol
- Estrogens
- Social behavior
- DANIO-RERIO
- ER-BETA
- SEXUAL-BEHAVIOR
- FEMALE
- ESTROGEN-RECEPTOR-BETA
- ESTRADIOL LEVELS
- ANXIETY DISORDERS
- NONREPRODUCTIVE BEHAVIOR
- STRESS
- BRAIN