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Platelet serotonergic functions and light therapy in seasonal affective disorder.

Abstract：

:We investigated platelet 14C-serotonin uptake and platelet [3H]LSD and [3H]paroxetine binding in 11 patients with seasonal affective disorder (SAD). Patients were reinvestigated after light therapy, applied at 07.00-09.00 h for 10 consecutive days. The degree of depression was rated before and after light therapy using the Comprehensive Psychopathological Rating Scale (CPRS). Baseline data in patients were compared with data from a control group consisting of 11 age- and sex-matched healthy volunteers. Seven patients responded to light therapy with a > 50% reduction in CPRS scores. In non-responders, the reduction in CPRS was 24.7 +/- 5.5%. There was a significant inverse correlation (P = 0.014) between Km for platelet 14C-serotonin uptake and CPRS scores. Patients had significantly higher Bmax for platelet [3H]LSD binding (P = 0.04) and significantly lower Bmax for platelet [3H]paroxetine binding (P = 0.016). There was a strong, multiple correlation between Bmax for [3H]LSD, as the dependent variable, and Km, Vmax and Bmax for [3H]paroxetine binding in patients (P < 0.0001) but not in controls. Responders to light therapy had significantly higher Km (P = 0.023) and significantly lower Bmax for [3H]paroxetine binding (P = 0.028) than non-responders. Bmax for [3H]paroxetine binding increased significantly to normal levels after light therapy. The results indicate that SAD is associated with aberrations in the serotonin uptake mechanism. The enhanced 5-HT2-receptor density may reflect a consequential up-regulation.

journal_name

Psychiatry Res

journal_title

Psychiatry research

authors

Stain-Malmgren R,Kjellman BF,Aberg-Wistedt A

doi

10.1016/s0165-1781(98)00017-1

subject

Has Abstract

pub_date

1998-05-08 00:00:00

pages

163-72

issue

3

eissn

0165-1781

issn

1872-7123

pii

S0165178198000171

journal_volume

78

pub_type

杂志文章

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