期刊
JOURNAL OF NEUROCHEMISTRY
卷 109, 期 5, 页码 1363-1374出版社
WILEY
DOI: 10.1111/j.1471-4159.2009.06050.x
关键词
depression; Flinders Sensitive Line; selective serotonin reuptake inhibitor; serotonin transporter; serotonin 2A receptor; serotonin 4 receptor
资金
- Faculty of Health Sciences at the University of Copenhagen
- Lundbeck Foundation
- Augustinus Foundation
The 5-hydroxytryptamine (5-HT4) receptor may be implicated in depression and is a new potential target for antidepressant treatment. We have investigated the brain 5-HT4 receptor [H-3]SB207145 binding in the Flinders Sensitive Line rat depression model by quantitative receptor autoradiography, and related this to 5-HT transporter (S)-[N-methyl-H-3]citalopram binding. We also determined the regulation of 5-HT4 receptor binding by 1, 14, and 21 days of paroxetine administration and subchronic 5-HT depletion, and compared this with changes in 5-HT2A receptor [H-3]MDL100907 binding. In the Flinders Sensitive Line, the 5-HT4 receptor and 5-HT transporter binding were decreased in the dorsal and ventral hippocampus, and the changes in binding were directly correlated within the dorsal hippocampus. Chronic but not acute paroxetine administration caused a 16-47% down-regulation of 5-HT4 receptor binding in all regions evaluated including the basal ganglia and hippocampus, while 5-HT depletion increased the 5-HT4 receptor binding in the dorsal hippocampus, hypothalamus, and lateral globus pallidus. In comparison, the 5-HT2A receptor binding was decreased in the frontal and cingulate cortices after chronic paroxetine administration, and markedly reduced in several regions after 5-HT depletion. Thus, the 5-HT4 receptor binding was decreased in the Flinders Sensitive Line depression model and in response to chronic paroxetine administration.
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