Effects of chronic lithium treatment on serotonin binding sites in rat brain.

Abstract:

:The effects of lithium treatment on serotonin (5-HT) binding sites in the rat brain were investigated. Oral administration of lithium carbonate for 3 weeks did not influence 5-HT2 binding sites in the cerebral cortex. On the other hand, the number of 5-HT1 binding sites labeled with [3H]5-HT was decreased significantly in the hippocampus, but not in the cerebral cortex. While non-5-HT1A sites, defined as specific [3H]5-HT binding in the presence of 100 nM 8-hydroxy-2-(di-n-propylamino) tetralin (8-OH-DPAT), were not affected by lithium treatment in either brain region, chronic lithium administration reduced significantly the density of 5-HT1A sites labeled with [3H]8-OH-DPAT only in the hippocampus, but not in the cerebral cortex. These results suggest that 5-HT1A components are responsible for lithium-induced down-regulation of 5-HT1 binding sites in the hippocampus and that 5-HT1A sites in the hippocampus might be connected with the therapeutic efficacy of lithium.

journal_name

J Psychiatr Res

authors

Odagaki Y,Koyama T,Matsubara S,Matsubara R,Yamashita I

doi

10.1016/0022-3956(90)90016-j

subject

Has Abstract

pub_date

1990-01-01 00:00:00

pages

271-7

issue

3

eissn

0022-3956

issn

1879-1379

journal_volume

24

pub_type

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