Evaluation of the effect of chronic antidepressant treatment on neurokinin-1 receptor expression in the rat brain.

Abstract:

:Clinically effective antidepressants are thought to exert their therapeutic effects by facilitating central monoamine neurotransmission. However, recent data showing that neurokinin-1 receptor (NK1R) antagonists have antidepressant properties in both animal and clinical studies raise the possibility that classical antidepressants may also influence NK1R expression in the brain. To test this hypothesis, rats were treated with desipramine, paroxetine, venlafaxine, tranylcypromine or vehicle for 14-42 days. NK1R binding sites and mRNA were determined in a wide variety of brain areas using in situ hybridization and quantitative receptor autoradiography. In all areas examined, the abundance of NK1R binding sites was unchanged after 14 days of treatment. None of the treatments altered the number of NK1R binding sites following 42 days treatment with the exception that an increase was found in the locus coeruleus with tranylcypromine. Taken together, we report that repeated treatment with antidepressants of different classes does not cause significant changes in NK1R expression.

journal_name

Neuropharmacology

journal_title

Neuropharmacology

authors

Sartori SB,Burnet PWJ,Sharp T,Singewald N

doi

10.1016/j.neuropharm.2004.02.013

subject

Has Abstract

pub_date

2004-06-01 00:00:00

pages

1177-1183

issue

8

eissn

0028-3908

issn

1873-7064

pii

S0028-3908(04)00051-6

journal_volume

46

pub_type

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