https://doi.org/10.29046/JJP.012.1.001">
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Jefferson Journal of Psychiatry

Abstract

In its simplest form, the serotonin deficiency theory of depression postulates that there is a net reduction in serotonin transmission in depressive illness. The pathophysiological change may result from two different mechanisms. The first involves a decrease in serotonin (5-HT) availability which has the consequential effect of compensatory receptor up-regulation or super sensitivity. The second mechanism implies a primary defect in receptor activity and/or signal transduction. The objective of this review is to analyze the serotonin system in depression as it relates to the above two postulates.

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https://doi.org/10.29046/JJP.012.1.001">