Effects of repeated oral doses of dexnorfenfluramine on 5-HT levels and 5-HT uptake sites in rat brain.

Abstract:

:The effects of oral dexnorfenfluramine (DNF; 1-4 mg/kg, twice daily for 4 days), the active metabolite of dexfenfluramine, were examined on rat regional brain indole contents and [3H]citalopram binding. Two hours after the last dose, serotonin (5-HT) and 5-hydroxyindoleacetic acid (5-HIAA) were dose-dependently lowered at doses above 1.5 mg/kg, with slight regional differences. Cortical 5-HT uptake sites were reduced only at the highest dose. Above 2 mg/kg DNF also caused a more lasting reduction (4 weeks) of regional indoles and cortical 5-HT uptake sites. At this longer time while the decrease in hippocampal 5-HT levels and cortical 5-HT uptake sites remained essentially constant, cortical and striatal 5-HT levels were lowered less than at 2 h, suggesting a return toward control values.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Gobbi M,Bergami A,Caltavuturo C,Valle FD,Mennini T,Caccia S

doi

10.1016/s0304-3940(96)13160-8

subject

Has Abstract

pub_date

1996-11-15 00:00:00

pages

5-8

issue

1

eissn

0304-3940

issn

1872-7972

pii

S0304394096131608

journal_volume

219

pub_type

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