Cited by 186Neuroendocrine regulation and behaviorNeuropeptides and Animal PhysiologyPrimate Behavior and Ecology

The neuroanatomical distribution of oxytocin receptor binding and mRNA in the male rhesus macaque (Macaca mulatta)

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Freeman, Sara M., Inoue, Kiyoshi, Smith, Aaron L., Goodman, Mark M., Young, Larry J.·2014·Psychoneuroendocrinology

Abstract

The rhesus macaque (Macaca mulatta) is an important primate model for social cognition, and recent studies have begun to explore the impact of oxytocin on social cognition and behavior. Macaques have great potential for elucidating the neural mechanisms by which oxytocin modulates social cognition, which has implications for oxytocin-based pharmacotherapies for psychiatric disorders such as autism and schizophrenia. Previous attempts to localize oxytocin receptors (OXTR) in the rhesus macaque brain have failed due to reduced selectivity of radioligands, which in primates bind to both OXTR and the structurally similar vasopressin 1a receptor (AVPR1A). We have developed a pharmacologically-informed competitive binding autoradiography protocol that selectively reveals OXTR and AVPR1A binding sites in primate brain sections. Using this protocol, we describe the neuroanatomical distribution of OXTR in the macaque. Finally, we use in situ hybridization to localize OXTR mRNA. Our results demonstrate that OXTR expression in the macaque brain is much more restricted than AVPR1A. OXTR is largely limited to the nucleus basalis of Meynert, pedunculopontine tegmental nucleus, the superficial gray layer of the superior colliculus, the trapezoid body, and the ventromedial hypothalamus. These regions are involved in a variety of functions relevant to social cognition, including modulating visual attention, processing auditory and multimodal sensory stimuli, and controlling orienting responses to visual stimuli. These results provide insights into the neural mechanisms by which oxytocin modulates social cognition and behavior in this species, which, like humans, uses vision and audition as the primary modalities for social communication.

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Crossref · 10.1016/j.psyneuen.2014.03.023

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  • OT receptors are concentrated in cholinergic brain regions regulating visual and auditory attention in nonhuman primates.

    “OT receptors are concentrated in cholinergic brain regions regulating visual and auditory attention in nonhuman primates (6, 42, 43)”

    From Statistical and Methodological Considerations for the Interpretation of Intranasal Oxytocin Studies (2016) · cites this paper as [42]

    The Discussion section on the nucleus basalis of Meynert and pedunculopontine tegmental nucleus reports OXTR expression in cholinergic regions linked to visual attention in rhesus macaques. The trapezoid-body section detects OXTR in an auditory relay, but calls its proposed auditory role speculative; it does not establish that receptors are concentrated in cholinergic regions regulating auditory attention. (LLM, conf=0.87)

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  • In humans, visual processing of social cues is facilitated by intranasal oxytocin through increased attention to and recognition of emotional cues in faces.

    “Similarly, in humans, visual processing of social cues is facilitated by IN-OT through increased attention to and recognition of emotional cues in faces [98,99].”
  • The optimized and reliable method for measuring OXTR and AVPR1a has been previously validated in nonhuman primate and human brain tissue to selectively reveal OXTR or AVPR1a.

    “we measured both OXTR and AVPR1a with an optimized and reliable method previously validated in nonhuman primate and human brain tissue34,37,38.”
  • The OXTR radioligand 125I-OVTA and the AVPR1a radioligand 125I-LVA bind to both receptor types when used in primate brain.

    “These radioligands are now known to bind to both receptor types when they are used in primate brain37.”
  • 125I-OVTA and 125I-LVA bind selectively in rodents but have relatively high affinities for both oxytocin receptors and vasopressin receptor 1a in primates.

    “Although these compounds bind selectively to their respective receptors in rodents, they have now been shown to exhibit relatively high affinities for both OXTR and AVPR1a in primates (27,28).”

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Research works printed but not linked: 1

  1. Smith AL Freeman SM Voll RJ Young LJ Goodman MM Investigation of an F-18 oxytocin receptor selective ligand via PET imaging. Bioorg. Med. Chem. Lett 2013b 23 5415 5420 23978650 PMC3955700

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Authors
Freeman, S. M., Inoue, K., Smith, A. L., Goodman, M. M., & Young, L. J.
Affiliations
Emory University (US)
Corresponding author
Freeman, Sara M.
Venue
Psychoneuroendocrinology
Publisher
Elsevier BV
Published
2014-07
Volume
45
Pages
128-141
ISSN
0306-4530 (ISSN-L)
OpenAlex
W1989923863
Cited by
185
References
73
Citations by year
2026: 2 · 2025: 4 · 2024: 4 · 2023: 7 · 2022: 13 · 2021: 17 · 2020: 9 · 2019: 12 · 2018: 28 · 2017: 26 · 2016: 29 · 2015: 23 · 2014: 10 · 2013: 1
FWCI
43.40
Type
journal article
Language
en
Open access
Locations
  • Psychoneuroendocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (5t32mh073525-05, P51OD011107, P51OD011132)
  • National Institute of Mental Health (T32-MH073525, R21MH090776, T32MH073525-06, P50MH100023, MH090776)
  • National Center for Research Resources (P51RR000165)
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Social Sciences › Psychology › Social Psychology › Primate Behavior and Ecology
Keywords
oxytocin receptor, vasopressin 1a receptor, AVPR1A, rhesus monkeys, neuroanatomical distribution, nucleus basalis of Meynert, pedunculopontine nucleus, superior colliculus, trapezoid body, ventromedial hypothalamus, social cognition, visual attention, auditory processing, orienting response, autism spectrum disorder, schizophrenia
MeSH terms
Animals, Brain, Cricetulus, Cricetinae, Humans, Macaca mulatta, Male, Neurons, Oxytocin, Protein Binding, RNA, Messenger, Tissue Distribution, CHO Cells, Receptors, Oxytocin

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