Cited by 35Neuroendocrine regulation and behaviorNeurotransmitter Receptor Influence on BehaviorSexual function and dysfunction studies

Oxytocin injected into the hippocampal ventral subiculum induces penile erection in male rats by increasing glutamatergic neurotransmission in the ventral tegmental area

Succu, Salvatora, Sanna, Fabrizio, Argiolas, Antonio, Melis, Maria Rosaria·2011·Neuropharmacology

Abstract

Oxytocin (100 ng) injected unilaterally into the ventral subiculum of the hippocampus induces penile erection episodes, which started 30 min after treatment and were abolished by the prior injection of d(CH(2))(5)Tyr(Me)(2)-Orn(8)-vasotocin (2 μg), an oxytocin receptor antagonist, into the ventral subiculum. Oxytocin-induced penile erection occurred 15 min after the increase of the concentration of extracellular dopamine in the dialysate obtained from either the nucleus accumbens or the prelimbic medial prefrontal cortex, which was also abolished by d(CH(2))(5)Tyr(Me)(2)-Orn(8)-vasotocin. An increase in extracellular glutamic acid concentration was also observed in the same dialysate obtained from the ventral tegmental area, but not from the prelimbic medial prefrontal cortex or the nucleus accumbens in which dopamine concentration was measured, 15 min after the injection of oxytocin into the ventral subiculum. This effect was also abolished by the prior injection of d(CH(2))(5)Tyr(Me)(2)-Orn(8)-vasotocin into the ventral subiculum. These results confirm previous findings showing that ventral subiculum oxytocin-induced penile erection is mediated by an increase of glutamic acid neurotransmission in the ventral tegmental area. This in turn increases mesolimbic and mesocortical dopaminergic activity, releasing dopamine in the nucleus accumbens and in the prelimbic medial prefrontal cortex. These results are in line with previous studies supporting the hypothesis that the ventral subiculum participates in a complex neural circuit controlling not only penile erection and copulation, but also sexual motivation, arousal and rewarding.

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Crossref · 10.1016/j.neuropharm.2011.03.026

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  • Activation of oxytocin neurons thought to target the VTA stimulates mesocorticolimbic dopaminergic neurons.

    “Recent studies show activation of oxytocin neurons thought to target the VTA stimulates mesocorticolimbic dopaminergic neurons (Melis et al., 2007, Melis et al., 2009, Succu et al., 2011, Succu et al., 2008).”

    From Oxytocin, motivation and the role of dopamine (2014) · cites this paper as Succu et al., 2011

  • The effect of oxytocin stimulation of the amygdala and hippocampus on penile erection and accumbal dopamine is suggested to occur due to activation of glutamatergic projections from the amygdala and hippocampus that act to stimulate mesolimbic dopamine neurons within the VTA.

    “This is suggested to occur due to activation of glutamatergic projections from the amygdala and hippocampus that act to stimulate mesolimbic dopamine neurons within the VTA (Melis et al., 2009, Succu et al., 2011).”

    From Oxytocin, motivation and the role of dopamine (2014) · cites this paper as Succu et al., 2011

  • Dopamine release in the nucleus accumbens stimulates dopamine neurons within the PVN that can ultimately activate oxytocinergic neurons and induce penile erection.

    “dopamine release in the nucleus accumbens has been demonstrated to produce stimulation of dopamine neurons within the PVN that can ultimately activate oxytocinergic neurons and induce penile erection (Melis et al., 2007, Melis et al., 2009, Succu et al., 2011, Succu et al., 2007).”

    From Oxytocin, motivation and the role of dopamine (2014) · cites this paper as Succu et al., 2011

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Authors
Succu, S., Sanna, F., Argiolas, A., & Melis, M. R.
Affiliations
University of Cagliari (IT)
Corresponding author
Melis, Maria Rosaria
Venue
Neuropharmacology
Publisher
Elsevier BV
Published
2011-07
Volume
61
Issue
1-2
Pages
181-188
ISSN
0028-3908 (ISSN-L)
OpenAlex
W2020991134
Cited by
35
References
66
Citations by year
2024: 2 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 3 · 2019: 2 · 2018: 1 · 2017: 4 · 2016: 3 · 2015: 2 · 2013: 6 · 2012: 5
FWCI
5.21
Type
journal article
Language
en
Open access
closed
Locations
  • Neuropharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • UNICA IRIS Institutional Research Information System (University of Cagliari) (submittedVersion)
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Psychiatry and Mental health › Sexual function and dysfunction studies
Keywords
oxytocin, penile erection, ventral subiculum, hippocampus, ventral tegmental area, glutamatergic neurotransmission, dopamine, nucleus accumbens, arginine vasotocin, oxytocin receptor, mesolimbic dopamine system, sexual behavior, sexual motivation
MeSH terms
Animals, Hippocampus, Injections, Intraventricular, Male, Neural Pathways, Synaptic Transmission, Oxytocin, Penile Erection, Rats, Sprague-Dawley, Ventral Tegmental Area, Glutamic Acid, Rats

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