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Biomedical subjects

C E Johansson

Publications and source records attributed to C E Johansson.

4 recordsLinked to original sources
PubMed1991

The novel 5-HT1A receptor antagonist (S)-UH-301 antagonizes 8-OH-DPAT-induced effects on male as well as female rat copulatory behaviour.

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.

8-Hydroxy-2-(di-n-propylamino)tetralin↗
PubMed1991

The effects of long-term treatment with 8-OH-DPAT on the lordosis response and hypothermia in female rats.

The effects of long-term treatment with a low dose of the 5-HT1A agonist 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT) on steroid hormone-dependent copulatory behaviour in female rats, the lordosis response, and on the hypothermic response of female rats were studied. Female rats were treated for 15 days, once daily, and tested on days 1 and 15 of treatment. They received 25 micrograms/kg on test days and 50 micrograms/kg on all other days. Subsensitivity was not induced to the inhibitory effect of 8-OH-DPAT on the lordosis response. In contrast, however, the acute effect of 8-OH-DPAT on body temperature was abolished by the long-term treatment. The results presented indicate that the induction of subsensitivity to the effects of 8-OH-DPAT is not primarily dependent on the pre- or post synaptic locus of action. Our data suggest that hormonal mechanisms are involved.

8-Hydroxy-2-(di-n-propylamino)tetralin↗
PubMed1990

The long-term effects of 8-hydroxy-2-(di-n-propyl-amino)tetralin (8-OH-DPAT) on copulatory and exploratory behaviour in male rats.

The long-term effects of low doses of the 5-HT1A-agonist, 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT), were studied to assess differences in the development of subsensitivity in 8-OH-DPAT-induced behavioural responses. Male rats received 33 or 100 micrograms/kg per day s.c. for 8 or 15 days. The chronic treatment did not alter the facilitatory effects of 8-OH-DPAT on male copulatory behaviour. In contrast, the effects on exploratory activity and the induction of flat body posture observed after the acute treatment were attenuated by prolonged administration of 8-OH-DPAT. The results presented indicate that gonadal hormones are involved in 5-HT receptor regulatory mechanisms.

8-Hydroxy-2-(di-n-propylamino)tetralin↗