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Oxytocin and Social Relationships: From Attachment to Bond Disruption

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Behavioral Pharmacology of Neuropeptides: Oxytocin

Part of the book series: Current Topics in Behavioral Neurosciences ((CTBN,volume 35))

Abstract

Social relationships throughout life are vital for well-being and physical and mental health. A significant amount of research in animal models as well as in humans suggests that oxytocin (OT) plays an important role in the development of the capacity to form social bonds, the mediation of the positive aspects of early-life nurturing on adult bonding capacity, and the maintenance of social bonding. Here, we focus on the extensive research on a socially monogamous rodent model organism, the prairie vole (Microtus ochrogaster). OT facilitates mating-induced pair bonds in adults through interaction with the mesolimbic dopamine system. Variation in striatal OT receptor density predicts resilience and susceptibility to neonatal social neglect in female prairie voles. Finally, in adults, loss of a partner results in multiple disruptions in OT signaling, including decreased OT release in the striatum, which is caused by an activation of the brain corticotropin releasing factor (CRF) system. The dramatic behavioral consequence of partner loss is increased depressive-like behavior reminiscent of bereavement. Importantly, infusions of OT into the striatum of adults prevents the onset of depressive-like behavior following partner loss, and evoking endogenous OT release using melanocortin agonists during neonatal social isolation rescues impairments in social bonding in adulthood. This work has important translational implications relevant to the disruptions of social bonds in childhood and in adults.

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Acknowledgments

The authors would like to acknowledge support from the Deutsche Forschungsgemeinschaft Grant DFG GRK 2147/1 to OJB and NIH Grants R01MH077776, R01MH096983, and 1P50MH100023 to LJY.

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Correspondence to Oliver J. Bosch or Larry J. Young .

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Bosch, O.J., Young, L.J. (2017). Oxytocin and Social Relationships: From Attachment to Bond Disruption. In: Hurlemann, R., Grinevich, V. (eds) Behavioral Pharmacology of Neuropeptides: Oxytocin. Current Topics in Behavioral Neurosciences, vol 35. Springer, Cham. https://doi.org/10.1007/7854_2017_10

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