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  • Title: The novel 5-HT1A receptor antagonist (S)-UH-301 antagonizes 8-OH-DPAT-induced effects on male as well as female rat copulatory behaviour.
    Author: Johansson CE, Meyerson BJ, Hacksell U.
    Journal: Eur J Pharmacol; 1991 Sep 04; 202(1):81-7. PubMed ID: 1838499.
    Abstract:
    The 5-HT1A receptor agonist 8-hydroxy-2-(dipropylamino)tetralin (8-OH-DPAT) facilitates male rat copulatory behaviour but inhibits female rat copulatory behaviour. The effect of the novel 5-HT1A receptor antagonist (S)-5-fluoro-8-hydroxy-2-(dipropylamino)tetralin [S)-UH-301) on these 8-OH-DPAT-induced responses was tested. 8-OH-DPAT was given s.c. in a dose of 0.176 mumol/kg (50 micrograms/kg). The doses of (S)-UH-301 given s.c. were 1.76 mumol/kg (0.53 mg/kg) and 5.28 mumol/kg (1.60 mg/kg). The administration of (S)-UH-301 10 min before 8-OH-DPAT antagonized the 8-OH-DPAT-induced effects on both male and female rat copulatory behaviour. The results presented strongly support the classification of (S)-UH-301 as a 5-HT1A receptor antagonist. In addition, the effect of the enantiomer of (S)-UH-301, (R)-5-fluoro-8-hydroxy-2-(dipropylamino)tetralin [R)-UH-301), on male rat copulatory behaviour was tested. This enantiomer was found to facilitate male rat copulatory behaviour in a 8-OH-DPAT-like manner, supporting a 5-HT1A agonistic action of (R)-UH-301.
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