Title : Central 5-HT1A receptor-mediated modulation of heart rate dynamics and its adjustment by conditioned and unconditioned fear in mice.

Pub. Date : 2013 Oct

PMID : 23902597






3 Functional Relationships(s)
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1 Pretest 5-HT1A receptor activation by 8-OH-DPAT (0.5 but not 0.1 and 0.02 mg kg(-1) ) caused bradycardia and increased HR variability. 8-Hydroxy-2-(di-n-propylamino)tetralin 5-hydroxytryptamine (serotonin) receptor 1A Mus musculus
2 The 5-HT1A receptor antagonist WAY-100635 (0.03 mg kg(-1) ) blocked these effects of 8-OH-DPAT. 8-Hydroxy-2-(di-n-propylamino)tetralin 5-hydroxytryptamine (serotonin) receptor 1A Mus musculus
3 CONCLUSIONS AND IMPLICATIONS: Pre-training 5-HT1A receptor activation by 8-OH-DPAT (0.5 mg kg(-1) ) impaired memory of conditioned auditory fear based on an attenuated HR increase, whereas pretest administration did not prevent the fear-conditioned HR increase but induced pathological HR dynamics through central ANS dysregulation with cardiac effects similar to acute SSRI overdose. 8-Hydroxy-2-(di-n-propylamino)tetralin 5-hydroxytryptamine (serotonin) receptor 1A Mus musculus