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Assessment of Sexual Behavior of Male Mice
Published on: March 5, 2020
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Behavioural changes in young ovariectomized mice via GPR30-dependent serotonergic nervous system.
Megumi Furukawa1,2,3, Nobuo Izumo4,5, Ryoken Aoki1,2,3
1Department of Functional Brain Activities, United Graduate School of Child Development, Osaka University, Suita, Japan.
The European Journal of Neuroscience
|August 27, 2024
Summary
Childhood ovariectomy in mice reduced activity and social behavior. Treatment with a G protein-coupled receptor 30 agonist reversed these effects, highlighting its role in regulating serotonin synthesis and behavior.
Area of Science:
- Neuroscience
- Endocrinology
- Behavioral Science
Background:
- Estradiol fluctuations impact the central nervous system and mental health.
- Menopausal estradiol decline is linked to depression and anxiety via the serotonin system.
- Estradiol's role in brain and behavior regulation during childhood and adolescence is understudied.
Purpose of the Study:
- Investigate the effects of decreased estradiol during childhood on behavior and the serotonin system.
- Examine the involvement of G protein-coupled receptor 30 (GPR30) in these processes.
Main Methods:
- Utilized an ovariectomized childhood mouse model (surgery at 4 weeks).
- Assessed spontaneous locomotor activity and social behavior using the three-chamber social test.
- Administered G-1, a GPR30 agonist, to ovariectomized mice.
- Analyzed tryptophan hydroxylase gene expression and serotonin release in specific brain regions (raphe nucleus, amygdaloid nucleus).
Main Results:
- Ovariectomy induced decreased locomotor activity and increased preference for novel mice.
- GPR30 agonist administration (G-1) suppressed these behavioral changes.
- Childhood ovariectomy increased tryptophan hydroxylase gene expression and serotonin release.
- G-1 administration ameliorated the neurochemical alterations induced by ovariectomy.
Conclusions:
- G protein-coupled receptor 30 plays a crucial role in regulating serotonin synthesis.
- GPR30-mediated pathways are involved in behavioral changes associated with decreased estradiol during childhood.
- This study provides insights into the neurobiological mechanisms underlying estradiol's influence on behavior during early life stages.
