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Dose dependent D2 effects on genital reflexes after MPOA injections of quinelorane and apomorphine
Abstract
This study investigated the effects on genital reflexes of unilateral MPOA injections of 0.1, 1, 3, and 10 micrograms of the D2 agonist quinelorane (LY-163502), and of 3 micrograms quinelorane administered together with 3 micrograms of the D1 antagonist SCH-23390. In addition, the effects of an MPOA injection of 10 micrograms apomorphine were tested. All but the lowest dose of quinelorane significantly decreased the latency to the first reflex. The 3 and 10 micrograms doses of quinelorane, and the combination of quinelorane and SCH-23390, decreased the total number of reflexes. In addition, 10 micrograms quinelorane increased the number of seminal emissions. 10 micrograms apomorphine, like 10 micrograms quinelorane, decreased the latency to the first reflex and increased the number of seminal emissions, but did not decrease the numbers of erections or penile movements. The ratio of D1/D2 activity may influence the number of erections displayed during ex copula testing.
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Pharmacologic stimulation of dopamine D2 receptors in the medial preoptic area decreases the frequency of erections while increasing seminal emissions.
“pharmacologic stimulation of dopamine D2 receptors in the medial preoptic area decreases the frequency of erections while increasing seminal emissions (Bazzett et al. 1991).”
From Perinatal Exposure to Low Levels of the Environmental Antiandrogen Vinclozolin Alters Sex-Differentiated Social Play and Sexual Behaviors in the Rat (2005) · cites this paper as Bazzett et al. 1991
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Cited by
Sorted by citations
Dopamine, the medial preoptic area, and male sexual behavior
DOMINGUEZ, J., & HULL, E. (2005) · Physiology & Behavior · doi:10.1016/j.physbeh.2005.08.006 · Cited by 277
Self-citationColbert, N. K. W., Pelletier, N. C., Cote, J. M., Concannon, J. B., Jurdak, N. A., Minott, S. B., & Markowski, V. P. (2005) · Environmental Health Perspectives · doi:10.1289/ehp.7509 · Cited by 60
“In a series of drug microinjection studies, this group has demonstrated that pharmacologic stimulation of dopamine D2 receptors in the medial preoptic area decreases the frequency of erections while increasing seminal emissions (Bazzett et al. 1991).”
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Metadata
- Authors
- Bazzett, T. J., Eaton, R. C., Thompson, J. T., Markowski, V. P., Lumley, L. A., & Hull, E. M.
- Affiliations
- University at Buffalo, State University of New York (US)
- Corresponding author
- Hull, E.M.
- Venue
- Life Sciences
- Publisher
- Elsevier BV
- Published
- 1991-01
- Volume
- 48
- Issue
- 24
- Pages
- 2309-2315
- ISSN
- 0024-3205 (ISSN-L)
- OpenAlex
- W2114651578
- Cited by
- 45
- References
- 0
- Citations by year
- 2025: 1 · 2022: 1 · 2019: 3 · 2016: 1 · 2014: 2
- FWCI
- 0.65
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Life Sciences (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Eli Lilly and Company
- National Institutes of Health
- National Institute of Mental Health (MH40826, R01MH040826)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
- Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
- Health Sciences › Medicine › Psychiatry and Mental health › Sexual function and dysfunction studies
- Keywords
- dopamine D2 receptor, dopamine D1 receptor, quinelorane, apomorphine, medial preoptic area, seminal emission, erection, dopamine agonists, dopamine antagonists
- MeSH terms
- Animals, Apomorphine, Benzazepines, Male, Penile Erection, Penis, Preoptic Area, Quinolines, Receptors, Dopamine, Reflex, Receptors, Dopamine D2, Rats
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