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Electroconvulsive stimulation differentially affects [11C]MDL100,907 binding to cortical and subcortical 5HT2A receptors in porcine brain

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  • Anne M Landau
  • Aage Kristian Olsen Alstrup
  • Ove Noer
  • Michael Winterdahl
  • Hélène Audrain
  • Poul Videbech
  • Arne Møller
  • Gregers Wegener
  • Albert Gjedde
  • Doris J Doudet
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BACKGROUND:: Electroconvulsive therapy is an effective therapy of depression. We hypothesized that the beneficial effects are mediated partly by decreased serotonin receptor availability in the cortex.

AIMS:: We used positron emission tomography with the serotonin 5HT2A receptor radioligand [11C]MDL100,907 to determine serotonin receptor availability in response to electroconvulsive stimulation (ECS).

METHODS:: Seven Göttingen minipigs were deeply anaesthetized and imaged at baseline before the onset of ECS, and at 1-2 and 8-10 days after the end of a clinical course of ECS, consisting of 10 sessions over 3.5 weeks, and post-ECS values were compared to baseline. One additional minipig was anaesthetized over 10 sessions without ECS, as a control. We analysed images with the Ichise model for binding in cortex and hippocampus, followed by whole-brain analysis by statistical non-parametric mapping.

RESULTS:: We found significantly increased binding potential of [11C]MDL100,907 in the cortex and hippocampus 1-2 days after ECS, consistent with increased serotonin receptor availability compared to baseline. By 8-10 days after the final ECS, the average tracer binding had returned towards baseline. However, we also found significantly decreased tracer binding in the subcortical regions of olfactory bulb, pons, thalamus and striatum.

CONCLUSIONS:: With ECS, minipigs, unlike primates but like rodents, have higher availability at cortical and hippocampal 5HT2A receptors. Decreased tracer binding is consistent with reduced serotonin receptor availability as a differential effect of ECS on 5HT2A receptors in subcortical regions of minipig brain.

Original languageEnglish
JournalJournal of psychopharmacology
Volume33
Issue number6
Pages (from-to)714-721
Number of pages8
ISSN0269-8811
DOIs
Publication statusPublished - Jun 2019

    Research areas

  • 5HT receptors, electroconvulsive stimulation, minipig, positron emission tomography, serotonin, [ C]MDL100907

ID: 57015064