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J Sex Med. 2012 Mar;9(3):694-707. doi: 10.1111/j.1743-6109.2011.02616.x. Epub 2012 Feb 3.

Flibanserin and 8-OH-DPAT implicate serotonin in association between female marmoset monkey sexual behavior and changes in pair-bond quality.

Author information

1
Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI, USA. auberty@lacdr.leidenuniv.nl

Abstract

INTRODUCTION:

Psychopathological origins of personally distressing, hypoactive sexual desire disorder (HSDD) in women are unknown, but are generally attributed to an inhibitory neural regulator, serotonin (5-HT). Flibanserin, a 5-HT(1A) agonist and 5-HT(2A) antagonist, shows promise as a treatment for HSDD.

AIM:

To test the hypothesis that female marmoset sexual behavior is enhanced by flibanserin and diminished by 8-OH-DPAT, in order to evaluate the efficacy of serotonergic modulation of female sexual behavior in a pairmate social setting comparable to humans.

METHODS:

Sexual and social behavior were examined in eight female marmoset monkeys receiving daily flibanserin (15 mg/kg), 8-OH-DPAT (0.1 mg/kg), or corresponding vehicle for 15-16 weeks in a counterbalanced, within-subject design, while housed in long-term, stable male-female pairs.

MAIN OUTCOME MEASURES:

Marmoset pairmate interactions, including sexual and social behavior, were scored during weeks 5-6 of daily flibanserin, 8-OH-DPAT or vehicle treatment. 24-hour pharmacokinetic profiles of the drugs and their metabolites, as well as drug-induced acute symptoms of the 5-HT behavioral syndrome were also assessed.

RESULTS:

Two-way analysis of variance reveals that flibanserin-treated females attract more male sexual interest (P=0.020) and trigger increased grooming (P=0.001) between partners. In contrast, 8-OH-DPAT-treated females show increased rejection of male sexual advances (P=0.024), a tendency for decreased male sexual interest (P=0.080), and increased aggression with their male pairmates (P=0.049).

CONCLUSIONS:

While 8-OH-DPAT-treated female marmosets display decreased sexual receptivity and increased aggressive interactions with their male pairmates, flibanserin-treated female marmosets demonstrate increased affiliative behavior with their male pairmates. Such pro-affiliation attributes may underlie flibanserin's effectiveness in treating HSDD in women.

PMID:
22304661
PMCID:
PMC5898967
DOI:
10.1111/j.1743-6109.2011.02616.x
[Indexed for MEDLINE]
Free PMC Article

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