Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:Q86TM3 (cage)
 29,987 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The effects of repeated treatment of rats with 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT), 1.0 mg/kg, subcutaneously, twice daily for 7 days, on the stimulation of post- and presynaptic 5-HT1A receptors were examined. The postsynaptic responses, hypothermia and inhibition of the cage-leaving response, evoked by 0.05 mg/kg 8-OH-DPAT, were measured 48 hr after the final injection. Another postsynaptic response, the 5-HT syndrome (flat body posture and forepaw treading) was observed after the third injection of 8-OH-DPAT (1.0 mg/kg s.c.). One presynaptic response examined was the 8-OH-DPAT-induced decrease in the concentration of 5-hydroxyindoleacetic acid (5-HIAA), that indicates a decrease in turnover of 5-HT, due to stimulation of 5-HT receptors on the cell bodies and measured as the ratio of 5-HIAA to 5-HT in the hippocampus, hypothalamus and medulla oblongata. Another presynaptic response was the 8-OH-DPAT-induced decrease in the accumulation of 5-hydroxytryptophan (5-HTP) in the hippocampus and hypothalamus, after inhibition of L-aromatic amino acid decarboxylase by 3-hydroxybenzylhydrazine (NSD 1015), that is due to stimulation of autoreceptors on the 5-HT cell bodies. The kinetic properties of 5-HT1A receptors in the cerebral cortex and hippocampus, hippocampus alone, hypothalamus and medulla oblongata were determined with [3H]8-OH-DPAT. It was found that the postsynaptic effects were markedly attenuated after the treatment, the hypothermic effect already after a single dose.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Different effects on the responses of functional pre- and postsynaptic 5-HT1A receptors by repeated treatment of rats with the 5-HT1A receptor agonist 8-OH-DPAT. 169 32

The effects of heterosexual interactions on the in vivo rate of regional brain monoamine synthesis were examined in the male rat. To this end, the animals were administered an inhibitor of cerebral aromatic L-amino acid decarboxylase, NSD-1015 (100 mg.kg-1 i.p.), and regional brain DOPA and 5-HTP accumulation, over a 15-35 min period of sexual interaction, was compared with the DOPA or 5-HTP accumulation in time-matched home cage controls. Using the DOPA and 5-HTP accumulation as an estimate for the rate of tyrosine and tryptophan hydroxylase activity, respectively, the present results demonstrate: (1) an increased demand on catecholamine synthesis in the neocortex, the amygdala and in the septal area; and (2) an increased dopamine and serotonin synthesis in the ventral striatum (excluding the olfactory tubercle), and in the dorsal striatum.
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PMID:Effects of sexual interactions on the in vivo rate of monoamine synthesis in forebrain regions of the male rat. 178 20

Regional changes in the rate of brain monoamine synthesis were monitored in male rats exposed to, but prevented from physical contact with, an estrous or an ovariectomized female. The in vivo rate of tyrosine and tryptophan hydroxylase activities were estimated by measuring the accumulation of DOPA and 5-HTP following inhibition of cerebral aromatic L-amino acid decarboxylase by means of 3-hydroxybenzylhydrazine (NSD-1015) treatment (100 mg/kg i.p.). 5 min upon NSD-1015 treatment, the males were exposed to an intact estrous female or an ovariectomized female for 20 min before decapitation and brain dissections. Exposure to an estrous female produced an increased rate of tyrosine and tryptophan hydroxylase activity in the medial prefrontal cortex, the dorso-lateral neostriatum and in the ventral neostriatum, in comparison with home-cage controls. By the same comparison, exposure to an ovariectomized female resulted in an increased rate of tyrosine hydroxylase activity in the medial prefrontal cortex, but not in the neostriatal areas, whereas tryptophan hydroxylase activity was unaffected. Finally, exposure to the empty test cage, with no stimulus females present, did not produce any statistically significant changes in the rate of tyrosine or tryptophan hydroxylase activity in any of the brain areas sampled. Taken together with recent findings from this laboratory, the present results demonstrate that the level of sexual motivation brought about by the olfactory, auditory and/or visual stimulation of a receptive female is associated with an increased demand on catecholamine and 5-hydroxytryptamine synthesis in the limbic forebrain of the male rat.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Effects of exposure to an estrous female on forebrain monoaminergic neurotransmission in the non-copulating male rat. 811 7