Correlation between platelet alpha(2)-adrenoreceptors and symptom severity in major depression.

Abstract:

BACKGROUND:Abnormalities in different parameters of the norepinephrine system have been widely described in major depression. The presence of alpha(2)-adrenoreceptors in blood platelets, similar to those in the brain, prompted us to evaluate them in depressed patients, as compared with healthy controls. METHODS:Fifteen outpatients affected by major depression, according to DSM IV criteria, and 15 comparable healthy control subjects, were included in the study. The alpha(2)-adrenoreceptors were measured by means of the specific binding of [(3)H]rauwolscine, a highly selective antagonist for this receptor subtype. The severity of depression was assessed by means of the Hamilton Rating Scale for Depression (HRSD). RESULTS:The results did not show any difference in [(3)H]rauwolscine binding parameters (B(max) and K(d)) between patients and controls. However, in the patients, a significant and positive correlation between B(max), which measures the density of the receptors, and HRSD total score was detected. CONCLUSIONS:Therefore, although no change in alpha(2)-adrenoreceptors seems to occur in major depression, the density of these receptors would seem to be related to the severity of depressive symptoms.

journal_name

Neuropsychobiology

journal_title

Neuropsychobiology

authors

Marazziti D,Baroni S,Masala I,Di Nasso E,Giannaccini G,Betti L,Lucacchini A,Cassano GB

doi

10.1159/000054930

keywords:

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

122-5

issue

3

eissn

0302-282X

issn

1423-0224

pii

54930

journal_volume

44

pub_type

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