Oxytocin and vasopressin enhance responsiveness to infant stimuli in adult marmosets |
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| Affiliation: | 1. Department of Psychology, University of Nebraska at Omaha, United States;2. Callitrichid Research Center, United States;3. Department of Biology, University of Nebraska at Omaha, United States;1. University of Antwerp, Department of Biology, B-2610 Antwerp, Belgium;2. Centre for Research and Conservation, Royal Zoological Society of Antwerp, B-2018 Antwerp, Belgium;3. Helsinki University, Finnish Centre of Excellence in Intersubjectivity in Interaction, FI-00014 Helsinki, Finland;4. University of Antwerp, Statua Center for Statistics, B-2000 Antwerp, Belgium;1. Department of Neurobiology and Behavior, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan;2. Department of Forensic Pathology and Sciences, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan;3. Department of Nursing, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8520, Japan;4. Department of Human Genetics, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan;1. Department of Zoology, University of Cambridge, Cambridge, UK;2. Department of Zoology and Entomology, Mammal Research Institute, University of Pretoria, Pretoria, South Africa;3. Kalahari Mole-rat Project, Kuruman River Reserve, Van Zylsrus, South Africa;4. Metapopulation Research Centre (MRC), Department of Biosciences, University of Helsinki, Helsinki, Finland;5. Ecology and Evolution in Microbial Model Systems, EEMiS, Department of Biology and Environmental Science, Linnaeus University, SE-391 82 Kalmar, Sweden;1. Department of Psychology, Cornell University, Ithaca, NY 14853, USA;2. Department of Integrative Biology, Oklahoma State University, Stillwater, OK 74078, USA |
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| Abstract: | The neuropeptides oxytocin (OT) and arginine-vasopressin (AVP) have been implicated in modulating sex-specific responses to offspring in a variety of uniparental and biparental rodent species. Despite the large body of research in rodents, the effects of these hormones in biparental primates are less understood. Marmoset monkeys (Callithrix jacchus) belong to a clade of primates with a high incidence of biparental care and also synthesize a structurally distinct variant of OT (proline instead of leucine at the 8th amino acid position; Pro8-OT). We examined the roles of the OT and AVP systems in the control of responses to infant stimuli in marmoset monkeys. We administered neuropeptide receptor agonists and antagonists to male and female marmosets, and then exposed them to visual and auditory infant-related and control stimuli. Intranasal Pro8-OT decreased latencies to respond to infant stimuli in males, and intranasal AVP decreased latencies to respond to infant stimuli in females. Our study is the first to demonstrate that Pro8-OT and AVP alter responsiveness to infant stimuli in a biparental New World monkey. Across species, the effects of OT and AVP on parental behavior appear to vary by species-typical caregiving responsibilities in males and females. |
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