Serotonin 4 receptor brain binding and oxytocin-promoted affective and social cognition in healthy women – A randomized controlled trial

Vibeke Høyrup Dam*, Sidsel Høgsgaard Andersen, Sofie Trolle Pedersen, Dea Siggaard Stenbæk, Vibe Gedsoe Frokjaer

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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Abstract

Background
Oxytocin is a neuropeptide known for its prosocial properties and role in social bonding, and intervention with intranasal oxytocin is posited to modulate affective and social cognition (i.e., hot cognition). Serotonin (5-HT) neurotransmission is also involved in emotional and social behaviors and appear to work in concert with oxytocin. However, this interaction so far remains elusive in humans. Therefore, we here investigate the relation between brain 5-HT 4 receptor (5-HT4R) levels and oxytocin-modulated hot cognition.

Methods
Using a double blind, placebo-controlled, randomized crossover design, 35 healthy women received a dose of 24 IU intranasal oxytocin or placebo one month apart. The women were naturally cycling and to control for hormonal fluctuations across the menstrual cycle, intervention days were placed during the early follicular phase. Following intervention cognitive domains including affective memory, affective bias in emotion processing, moral emotions and social information preference were assessed. In a subgroup (n = 25), Positron Emission Tomography (PET) was used to image 5-HT4R brain binding at baseline with the [11C]SB207145 radiotracer.

Results
No effect of oxytocin intervention relative to placebo was observed for any of the cognitive outcomes. Likewise, regional brain 5-HT4R binding at baseline was not associated with cognitive responses to oxytocin intervention.

Conclusion
Our data suggest that intervention with intranasal oxytocin does not have an overall effect on hot cognition in healthy women and further that 5-HT4R brain architecture does not mediate cognitive effects of oxytocin in the healthy state.
OriginalsprogEngelsk
Artikelnummer100224
TidsskriftComprehensive Psychoneuroendocrinology
Vol/bind17
Antal sider5
ISSN2666-4976
DOI
StatusUdgivet - 2024

Bibliografisk note

Funding Information:
This study was funded by the Independent Research Fund Denmark (ID 4183-00420B ). The funders had no role in the design and conduct of the study, collection, management, analysis and interpretation of the data preparation, review or approval of the manuscript.

Publisher Copyright:
© 2024 The Authors

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