impairment of serotonergic transmission by the antiparkinsonian drug l-dopa: mechanisms and clinical implications
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2017
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Abstract
The link between the anti-Parkinsonian drug L-3,4-dihydroxyphenylalanine (L-DOPA) and the serotonergic (5-HT) system has been long established and has received increased attention during the last decade. Most studies have focused on the fact that L-DOPA can be transformed into dopamine (DA) and released from 5-HT terminals, which is especially important for the management of L-DOPA-induced dyskinesia. In patients, treatment using L-DOPA also impacts 5-HT neurotransmission; however, few studies have investigated the mechanisms of this effect. The purpose of this review is to summarize the electrophysiological and neurochemical data concerning the effects of L-DOPA on 5-HT cell function. This review will argue that L-DOPA disrupts the link between the electrical activity of 5-HT neurons and 5-HT release as well as that between 5-HT release and extracellular 5-HT levels. These effects are caused by the actions of L-DOPA and DA in 5-HT neurons, which affect 5-HT neurotransmission from the biosynthesis of 5-HT to the impairment of the 5-HT transporter. The interaction between L-DOPA and 5-HT transmission is especially relevant in those Parkinson’s disease (PD) patients that suffer dyskinesia, comorbid anxiety or depression, since the efficacy of antidepressants or 5-HT compounds may be affected.
| Reference Key |
miguelez2017frontiersimpairment
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|---|---|
| Authors | ;Cristina Miguelez;Abdelhamid Benazzouz;Abdelhamid Benazzouz;Luisa Ugedo;Philippe De Deurwaerdère;Philippe De Deurwaerdère |
| Journal | macromolecular bioscience |
| Year | 2017 |
| DOI |
10.3389/fncel.2017.00274
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| URL | |
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