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- W2060857466 abstract "Tricyclic antidepressants and serotonin (5-HT) uptake inhibitors rapidly block uptake sites, or transporters; however, their therapeutic effects are only seen after 2-3 weeks of treatment. Thus, direct blockade of 5-HT and noradrenaline (NA) transporters cannot account entirely for their clinical efficacy, and other long-term changes may be involved. Adult Sprague-Dawley rats were treated for 21 days with daily injections of either desipramine, trimipramine, fluoxetine, or venlafaxine; a fifth group that was used as a control, received daily saline injections. Identified cortical areas, hippocampal divisions and nuclei raphe dorsalis, raphe medialis and locus coeruleus were examined by quantitative autoradiography using either [3H]citalopram to label 5-HT transporters, or [3H]nisoxetine for NA uptake sites. Increases in [3H]nisoxetine binding were found in the cingulate, frontal, parietal, agranular insular, entorhinal and perirhinal cortices as well as in the hippocampal divisions CA1, CA3, dentate gyrus and subiculum, and in nucleus raphe dorsalis of trimipramine-treated animals compared to the control rats. Also, densities of NA transporters decreased in temporal cortex, CA2 and nucleus raphe dorsalis in fluoxetine-treated rats as compared to the controls. Also, there was a decrease in NA transporters in the locus coeruleus of the desipramine-treated animals as compared to the densities measured in the control group. Chronic treatment with desipramine or trimipramine, which do not directly inhibit 5-HT uptake, compared to fluoxetine and venlafaxine, lead to increases in 5-HT transporter densities in cingulate, agranular insular and perirhinal cortices. The present study shows differential region-specific effects of antidepressants on 5-HT and NA transporters, leading to distinct consequences in forebrain areas." @default.
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- W2060857466 date "2001-01-01" @default.
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- W2060857466 title "Effects of chronic antidepressant treatments on 5-HT and NA transporters in rat brain: an autoradiographic study" @default.
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- W2060857466 doi "https://doi.org/10.1016/s0197-0186(00)00043-7" @default.
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