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The influence of oxytocin administration on responses to infant faces and potential moderation by OXTR genotype

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Abstract

Rationale

Oxytocin is a neuropeptide that is associated with increases in social affiliative behaviors, particularly toward infants. However, no previous study has investigated healthy adults’ responses to infant faces following oxytocin administration. In addition, given that preliminary evidence suggests that a single-nucleotide polymorphism of the oxytocin receptor (OXTR) gene, rs53576, may influence behaviors associated with parental sensitivity, we assessed whether such responses vary according to OXTR rs53576 genotype.

Objectives

The present study assessed the effects of intranasally administered oxytocin and OXTR genotype on human adults’ preferences for infant faces.

Methods

A double-blind, between-groups design was used, with 57 genotyped volunteers randomly assigned to receive intranasally administered oxytocin or placebo. Fifty minutes following the administration of oxytocin or placebo, participants viewed infants’ and adults’ faces showing neutral expressions and assessed how appealing they found each face.

Results

Infants’ faces were more strongly preferred following oxytocin inhalation relative to placebo. When participants were separated according to genotype, this effect was only observed for participants homozygous for the rs53576G allele. Parallel effects were not seen for adults’ faces.

Conclusions

The present results are consistent with the hypothesis that acute oxytocin administration increases sensitivity to reward-relevant features of infants and/or reduces sensitivity to their aversive properties. The results are also consistent with suggestions of more efficient oxytocinergic function in rs53576G homozygotes.

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Acknowledgments

This research was supported by the Intramural Research Program of the NIH/NIMH. The authors would like to thank Andy Speer, Samantha Crowe, Nanette Schell, David Fink, Adriana Pavletic, and Judith Starling for their assistance in conducting this research.

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Correspondence to Abigail A. Marsh.

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Marsh, A.A., Yu, H.H., Pine, D.S. et al. The influence of oxytocin administration on responses to infant faces and potential moderation by OXTR genotype. Psychopharmacology 224, 469–476 (2012). https://doi.org/10.1007/s00213-012-2775-0

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  • DOI: https://doi.org/10.1007/s00213-012-2775-0

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