ArticleNuclear medicine and biology2010
SPECT imaging with the serotonin transporter radiotracer [123I]p ZIENT in nonhuman primate brain.
Article in Nuclear medicine and biology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
2 citing papers in PubMed, 8 citations in OpenAlex.
- Serotonin transporter occupancy by escitalopram and citalopram in the non-human primate brain: a [(11)C]MADAM PET study.Psychopharmacology · 2015Article
- Fluoxetine blocks Nav1.5 channels via a mechanism similar to that of class 1 antiarrhythmics.Molecular pharmacology · 2014Article
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Authors and funding
9 authors at 3 institutions in 1 country.
Funding
Abstract
introductionSerotonin dysfunction has been linked to a variety of psychiatric diseases; however, an adequate SPECT radioligand to probe the serotonin transporter system has not been successfully developed. The purpose of this study was to characterize and determine the in vivo selectivity of iodine-123-labeled 2beta-carbomethoxy-3beta-(4'-((Z)-2-iodoethenyl)phenyl)nortropane, [(123)I]p ZIENT, in nonhuman primate brain.
methodsTwo ovariohysterectomized female baboons participated in nine studies (one bolus and eight bolus to constant infusion at a ratio of 9.0 h) to evaluate [(123)I]p ZIENT. To evaluate the selectivity of [(123)I]p ZIENT, the serotonin transporter blockers fenfluramine (1.5, 2.5 mg/kg) and citalopram (5 mg/kg), the dopamine transporter blocker methylphenidate (0.5 mg/kg) and the norepinephrine transporter blocker nisoxetine (1 mg/kg) were given at 8 h post-radiotracer injection.
resultsIn the bolus to constant infusion studies, equilibrium was established by 4-8 h. [(123)I]p ZIENT was 93% and 90% protein bound in the two baboons and there was no detection of lipophilic radiolabeled metabolites entering the brain. In the high-density serotonin transporter regions (diencephalon and brainstem), fenfluramine and citalopram resulted in 35-71% and 129-151% displacement, respectively, whereas methylphenidate and nisoxetine did not produce significant changes (<10%).
conclusionThese findings suggest that [(123)I]p ZIENT is a favorable compound for in vivo SPECT imaging of serotonin transporters with negligible binding to norepinephrine and dopamine transporters.
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