Effect of clinically relevant doses of vortioxetine and citalopram on serotonergic PET markers in the nonhuman primate brain

Vortioxetine is a multimodal antidepressant approved for treatment of major depressive disorder. Preclinical studies have demonstrated that the mechanism of action of vortioxetine might be different from selective serotonin reuptake inhibitors (SSRIs), including larger serotonin (5-HT) release and d...

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Veröffentlicht in:Neuropsychopharmacology (New York, N.Y.) N.Y.), 2019-09, Vol.44 (10), p.1706-1713
Hauptverfasser: Yang, Kai-Chun, Stepanov, Vladimir, Amini, Nahid, Martinsson, Stefan, Takano, Akihiro, Bundgaard, Christoffer, Bang-Andersen, Benny, Sanchez, Connie, Halldin, Christer, Farde, Lars, Finnema, Sjoerd J
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container_end_page 1713
container_issue 10
container_start_page 1706
container_title Neuropsychopharmacology (New York, N.Y.)
container_volume 44
creator Yang, Kai-Chun
Stepanov, Vladimir
Amini, Nahid
Martinsson, Stefan
Takano, Akihiro
Bundgaard, Christoffer
Bang-Andersen, Benny
Sanchez, Connie
Halldin, Christer
Farde, Lars
Finnema, Sjoerd J
description Vortioxetine is a multimodal antidepressant approved for treatment of major depressive disorder. Preclinical studies have demonstrated that the mechanism of action of vortioxetine might be different from selective serotonin reuptake inhibitors (SSRIs), including larger serotonin (5-HT) release and direct modulation of several 5-HT receptors. In the current positron emission tomography (PET) study, we evaluated the mechanism of action of vortioxetine by comparing its effect to the SSRI citalopram on the binding of [ C]AZ10419369 to the 5-HT receptor in the nonhuman primate brain. Initially, the 5-HT transporter (5-HTT) binding of vortioxetine was determined by [ C]MADAM PET measurements before and after administration of vortioxetine (0.1-3.0 mg/kg) and data were used to confirm clinically relevant dosing in subsequent PET measurements with [ C]AZ10419369. The 5-HT receptor binding was significantly decreased after 0.3 mg/kg of citalopram in the dorsal raphe nucleus (5%), as well as after 0.3 mg/kg of vortioxetine in six brain regions (~25%) or 1.0 mg/kg of vortioxetine in all 12 examined regions (~48%). Moreover, there was no effect of 1.0 mg/kg of vortioxetine on the binding of [ C]Cimbi-36 to the 5-HT receptor, which has comparable sensitivity to 5-HT release as [ C]AZ10419369 binding. In conclusion, at clinically relevant doses, vortioxetine induced larger reductions in [ C]AZ10419369 binding than citalopram. These observations suggest that vortioxetine binds to the 5-HT receptor at clinically relevant doses. Future studies are warranted to evaluate the role of the 5-HT receptor in the therapeutic effects of vortioxetine and as a potential target for the development of novel antidepressant drugs.
doi_str_mv 10.1038/s41386-019-0442-4
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Preclinical studies have demonstrated that the mechanism of action of vortioxetine might be different from selective serotonin reuptake inhibitors (SSRIs), including larger serotonin (5-HT) release and direct modulation of several 5-HT receptors. In the current positron emission tomography (PET) study, we evaluated the mechanism of action of vortioxetine by comparing its effect to the SSRI citalopram on the binding of [ C]AZ10419369 to the 5-HT receptor in the nonhuman primate brain. Initially, the 5-HT transporter (5-HTT) binding of vortioxetine was determined by [ C]MADAM PET measurements before and after administration of vortioxetine (0.1-3.0 mg/kg) and data were used to confirm clinically relevant dosing in subsequent PET measurements with [ C]AZ10419369. The 5-HT receptor binding was significantly decreased after 0.3 mg/kg of citalopram in the dorsal raphe nucleus (5%), as well as after 0.3 mg/kg of vortioxetine in six brain regions (~25%) or 1.0 mg/kg of vortioxetine in all 12 examined regions (~48%). Moreover, there was no effect of 1.0 mg/kg of vortioxetine on the binding of [ C]Cimbi-36 to the 5-HT receptor, which has comparable sensitivity to 5-HT release as [ C]AZ10419369 binding. In conclusion, at clinically relevant doses, vortioxetine induced larger reductions in [ C]AZ10419369 binding than citalopram. These observations suggest that vortioxetine binds to the 5-HT receptor at clinically relevant doses. 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Stepanov, Vladimir ; Amini, Nahid ; Martinsson, Stefan ; Takano, Akihiro ; Bundgaard, Christoffer ; Bang-Andersen, Benny ; Sanchez, Connie ; Halldin, Christer ; Farde, Lars ; Finnema, Sjoerd J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c515t-b99736376e56fb09e1da4a13f3e186cceec06d9244a81b624980da9ab4e4cb5f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Animals</topic><topic>Antidepressants</topic><topic>Benzopyrans</topic><topic>Benzylamines</topic><topic>Brain</topic><topic>Brain - diagnostic imaging</topic><topic>Brain - drug effects</topic><topic>Brain - metabolism</topic><topic>Citalopram</topic><topic>Citalopram - metabolism</topic><topic>Citalopram - pharmacology</topic><topic>Dorsal raphe nucleus</topic><topic>Dorsal Raphe Nucleus - diagnostic imaging</topic><topic>Dorsal Raphe Nucleus - drug effects</topic><topic>Dorsal Raphe Nucleus - metabolism</topic><topic>Dosage</topic><topic>Drug development</topic><topic>Emission analysis</topic><topic>Female</topic><topic>Macaca mulatta</topic><topic>Medicin och hälsovetenskap</topic><topic>Morpholines</topic><topic>Phenethylamines</topic><topic>Piperazines</topic><topic>Positron emission tomography</topic><topic>Raphe nuclei</topic><topic>Receptor, Serotonin, 5-HT1B - metabolism</topic><topic>Receptor, Serotonin, 5-HT2A - metabolism</topic><topic>Serotonin</topic><topic>Serotonin S1 receptors</topic><topic>Serotonin S2 receptors</topic><topic>Serotonin uptake inhibitors</topic><topic>Serotonin Uptake Inhibitors - metabolism</topic><topic>Serotonin Uptake Inhibitors - pharmacology</topic><topic>Vortioxetine - metabolism</topic><topic>Vortioxetine - pharmacology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yang, Kai-Chun</creatorcontrib><creatorcontrib>Stepanov, Vladimir</creatorcontrib><creatorcontrib>Amini, Nahid</creatorcontrib><creatorcontrib>Martinsson, Stefan</creatorcontrib><creatorcontrib>Takano, Akihiro</creatorcontrib><creatorcontrib>Bundgaard, Christoffer</creatorcontrib><creatorcontrib>Bang-Andersen, Benny</creatorcontrib><creatorcontrib>Sanchez, Connie</creatorcontrib><creatorcontrib>Halldin, Christer</creatorcontrib><creatorcontrib>Farde, Lars</creatorcontrib><creatorcontrib>Finnema, Sjoerd J</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Neurosciences Abstracts</collection><collection>Health &amp; 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The 5-HT receptor binding was significantly decreased after 0.3 mg/kg of citalopram in the dorsal raphe nucleus (5%), as well as after 0.3 mg/kg of vortioxetine in six brain regions (~25%) or 1.0 mg/kg of vortioxetine in all 12 examined regions (~48%). Moreover, there was no effect of 1.0 mg/kg of vortioxetine on the binding of [ C]Cimbi-36 to the 5-HT receptor, which has comparable sensitivity to 5-HT release as [ C]AZ10419369 binding. In conclusion, at clinically relevant doses, vortioxetine induced larger reductions in [ C]AZ10419369 binding than citalopram. These observations suggest that vortioxetine binds to the 5-HT receptor at clinically relevant doses. 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source MEDLINE; SWEPUB Freely available online; EZB-FREE-00999 freely available EZB journals; PubMed Central; Alma/SFX Local Collection
subjects Animals
Antidepressants
Benzopyrans
Benzylamines
Brain
Brain - diagnostic imaging
Brain - drug effects
Brain - metabolism
Citalopram
Citalopram - metabolism
Citalopram - pharmacology
Dorsal raphe nucleus
Dorsal Raphe Nucleus - diagnostic imaging
Dorsal Raphe Nucleus - drug effects
Dorsal Raphe Nucleus - metabolism
Dosage
Drug development
Emission analysis
Female
Macaca mulatta
Medicin och hälsovetenskap
Morpholines
Phenethylamines
Piperazines
Positron emission tomography
Raphe nuclei
Receptor, Serotonin, 5-HT1B - metabolism
Receptor, Serotonin, 5-HT2A - metabolism
Serotonin
Serotonin S1 receptors
Serotonin S2 receptors
Serotonin uptake inhibitors
Serotonin Uptake Inhibitors - metabolism
Serotonin Uptake Inhibitors - pharmacology
Vortioxetine - metabolism
Vortioxetine - pharmacology
title Effect of clinically relevant doses of vortioxetine and citalopram on serotonergic PET markers in the nonhuman primate brain
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