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Neural correlates of mating system diversity: oxytocin and vasopressin receptor distributions in monogamous and non-monogamous Eulemur
Open accessAbstract
Contemporary theory that emphasizes the roles of oxytocin and vasopressin in mammalian sociality has been shaped by seminal vole research that revealed interspecific variation in neuroendocrine circuitry by mating system. However, substantial challenges exist in interpreting and translating these rodent findings to other mammalian groups, including humans, making research on nonhuman primates crucial. Both monogamous and non-monogamous species exist within Eulemur, a genus of strepsirrhine primate, offering a rare opportunity to broaden a comparative perspective on oxytocin and vasopressin neurocircuitry with increased evolutionary relevance to humans. We performed oxytocin and arginine vasopressin 1a receptor autoradiography on 12 Eulemur brains from seven closely related species to (1) characterize receptor distributions across the genus, and (2) examine differences between monogamous and non-monogamous species in regions part of putative “pair-bonding circuits”. We find some binding patterns across Eulemur reminiscent of olfactory-guided rodents, but others congruent with more visually oriented anthropoids, consistent with lemurs occupying an ‘intermediary’ evolutionary niche between haplorhine primates and other mammalian groups. We find little evidence of a “pair-bonding circuit” in Eulemur akin to those proposed in previous rodent or primate research. Mapping neuropeptide receptors in these nontraditional species questions existing assumptions and informs proposed evolutionary explanations about the biological bases of monogamy.
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In lemurs, the pattern of OXTR and AVPR1a is largely similar.
“In lemurs, the pattern of OXTR and AVPR1a is largely similar (Grebe et al. 2021).”
From Distribution of brain oxytocin and vasopressin V1a receptors in chimpanzees (Pan troglodytes): comparison with humans and other primate species (2022) · cites this paper as Grebe et al. 2021
In lemurs, no OXTR binding was reported in the nucleus basalis of Meynert.
“A recent study in lemurs also reported no OXTR binding in this region (Grebe et al. 2021) (Fig. 3).”
From Distribution of brain oxytocin and vasopressin V1a receptors in chimpanzees (Pan troglodytes): comparison with humans and other primate species (2022) · cites this paper as Grebe et al. 2021
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Metadata
- Authors
- Grebe, N. M., Sharma, A., Freeman, S. M., Palumbo, M. C., Patisaul, H. B., Bales, K. L., & Drea, C. M.
- Affiliations
- Duke University (US)
- Utah State University (US)
- Oregon Health & Science University (US)
- North Carolina State University (US)
- University of California, Davis (US)
- Corresponding author
- Grebe, Nicholas M.
- ORCID
- Venue
- Scientific Reports
- Published
- 2021-02-12
- Volume
- 11
- Issue
- 1
- Pages
- 3746-3746
- ISSN
- 2045-2322 (ISSN-L)
- PMC
- PMC7881006
- OpenAlex
- W3127744282
- Cited by
- 26
- References
- 79
- Citations by year
- 2026: 2 · 2025: 3 · 2024: 3 · 2023: 5 · 2022: 9 · 2021: 4
- FWCI
- 5.14
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Reports (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- eScholarship (California Digital Library) (submittedVersion)
- Funders
- Directorate for Social, Behavioral and Economic Sciences (SBE-1808803)
- Duke Institute for Brain Sciences, Duke University
- Duke University
- National Institute of Mental Health (R21MH115680)
- Topics
- Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Neuroendocrine regulation and behavior
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Primate Behavior and Ecology
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Animal Behavior and Reproduction
- Keywords
- oxytocin, vasopressin, vasopressin 1a receptor, mating systems, monogamy, Eulemur, lemurs, strepsirrhine primates, sociality, comparative neuroendocrinology
- MeSH terms
- Animals, Brain, Brain Mapping, Biological Evolution, Female, Lemuridae, Male, Memory, Neurosecretory Systems, Oxytocin, Pair Bond, Primates, Reproduction, Sexual Behavior, Animal, Social Behavior, Species Specificity, Vasopressins, Receptors, Vasopressin, Receptors, Oxytocin, Evolution, Molecular
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