Cited by 41Neuroendocrine regulation and behaviorOlfactory and Sensory Function StudiesHypothalamic control of reproductive hormones

Copulation or sensory cues from the female augment Fos expression in arginine vasopressin neurons of the posterodorsal medial amygdala of male rats

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Hari Dass, Shantala, Vyas, Ajai·2014·Frontiers in Zoology

Abstract

BACKGROUND: The posterodorsal part of the medial amygdala is essential for processing reproductively salient sensory information in rodents. This is the initial brain structure where information from olfactory system and male hormones intersect. The neurochemical identity of the neurons participating in the sensory processing in medial amygdala remains presently undetermined. Many neurons in this brain structure express arginine vasopressin in a testosterone-dependent manner, suggesting that this neuropeptide is maintained by the androgenic milieu. METHOD: Here we use Fos, a protein expressed by recently active neurons, to quantify activation of arginine vasopressin neurons after exposure to odor from physically inaccessible female. We compare it to mating with accessible female and to reproductively innocuous odor. RESULTS: We show that inaccessible female activate arginine vasopressin neurons in the male posterodorsal medial amygdala. The magnitude of activation is not further enhanced when physical access with resultant mating is granted, even though it remains undetermined if same population of AVP neurons is activated by both inaccessible female and copulation. We also show that arginine vasopressin activation cannot be fully accounted for by mere increase in the number of Fos and AVP neurons. CONCLUSION: These observations posit a role for the medial amygdala arginine vasopressin in reproductive behaviors, suggesting that these neurons serve as integrative node between the hormonal status of the animal and the availability of reproductive opportunities.

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  • Copulation with a female augments Fos expression in AVP-ir neurons in the MeP and BNST of adult male rats and mice.

    “In line with this, copulation with a female augments Fos expression in AVP-ir neurons in the MeP and BNST of adult male rats (Hari Dass & Vyas, 2014) and mice (Ho et al., 2010).”

    From Quantitative mapping reveals age and sex differences in vasopressin, but not oxytocin, immunoreactivity in the rat social behavior neural network (2017) · cites this paper as Hari Dass & Vyas, 2014

    Table 1 in Results and discussion shows a higher percentage of Fos-positive AVP-ir neurons in the MePD after copulation in male rats. The paper does not report that finding for the rat BNST; its discussion mentions BNST activation during copulation in mice, which the citing sentence attributes separately to Ho et al. (2010). (LLM, conf=0.88)

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Authors
Hari Dass, S., & Vyas, A.
Affiliations
Nanyang Technological University (SG)
Corresponding author
Vyas, Ajai
Venue
Frontiers in Zoology
Published
2014
Volume
11
Issue
1
Pages
42
ISSN
1742-9994 (ISSN-L)
OpenAlex
W2105344222
Cited by
41
References
49
Citations by year
2024: 2 · 2023: 3 · 2022: 4 · 2021: 6 · 2020: 1 · 2019: 5 · 2018: 1 · 2017: 3 · 2016: 6 · 2015: 7 · 2014: 3
FWCI
9.40
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Zoology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DR-NTU (Nanyang Technological University) (submittedVersion, cc-by)
Funders
  • Ministry of Education - Singapore
  • Nanyang Technological University
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Sensory Systems › Olfactory and Sensory Function Studies
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
vasopressin, posterodorsal medial amygdala, Fos expression, copulation, olfactory cues, androgen dependence, testosterone, reproductive behavior, male rats, sensory processing, neuronal activation

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