Long‐range projections of oxytocin neurons in the marmoset brain

Author:

Lefevre Arthur12ORCID,Meza Jazlynn1,Miller Cory T.13

Affiliation:

1. Cortical Systems and Behavior Laboratory University of California San Diego La Jolla California USA

2. Institute of Cognitive Sciences Marc Jeannerod CNRS and University of Lyon Bron France

3. Neuroscience Graduate Program University of California San Diego La Jolla California USA

Abstract

AbstractThe neurohormone oxytocin (OT) has become a major target for the development of novel therapeutic strategies to treat psychiatric disorders such as autism spectrum disorder because of its integral role in governing many facets of mammalian social behavior. Whereas extensive work in rodents has produced much of our knowledge of OT, we lack basic information about its neurobiology in primates making it difficult to interpret the limited effects that OT manipulations have had in human patients. In fact, previous studies have revealed only limited OT fibers in primate brains. Here, we investigated the OT connectome in marmoset using immunohistochemistry, and mapped OT fibers throughout the brains of adult male and female marmoset monkeys. We found extensive OT projections reaching limbic and cortical areas that are involved in the regulation of social behaviors, such as the amygdala, the medial prefrontal cortex, and the basal ganglia. The pattern of OT fibers observed in marmosets is notably similar to the OT connectomes described in rodents. Our findings here contrast with previous results by demonstrating a broad distribution of OT throughout the marmoset brain. Given the prevalence of this neurohormone in the primate brain, methods developed in rodents to manipulate endogenous OT are likely to be applicable in marmosets.

Funder

Common Fund

HORIZON EUROPE Marie Sklodowska-Curie Actions

Publisher

Wiley

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