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Brain serotonin 4 receptor binding is inversely associated with verbal memory recall

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BACKGROUND: We have previously identified an inverse relationship between cerebral serotonin 4 receptor (5-HT 4R) binding and nonaffective episodic memory in healthy individuals. Here, we investigate in a novel sample if the association is related to affective components of memory, by examining the association between cerebral 5-HT 4R binding and affective verbal memory recall.

METHODS: Twenty-four healthy volunteers were scanned with the 5-HT 4R radioligand [(11)C]SB207145 and positron emission tomography, and were tested with the Verbal Affective Memory Test-24. The association between 5-HT 4R binding and affective verbal memory was evaluated using a linear latent variable structural equation model.

RESULTS: We observed a significant inverse association across all regions between 5-HT 4R binding and affective verbal memory performances for positive (p = 5.5 × 10(-4)) and neutral (p = .004) word recall, and an inverse but nonsignificant association for negative (p = .07) word recall. Differences in the associations with 5-HT 4R binding between word categories (i.e., positive, negative, and neutral) did not reach statistical significance.

CONCLUSION: Our findings replicate our previous observation of a negative association between 5-HT 4R binding and memory performance in an independent cohort and provide novel evidence linking 5-HT 4R binding, as a biomarker for synaptic 5-HT levels, to the mnestic processing of positive and neutral word stimuli in healthy humans.

Original languageEnglish
JournalGenes, Brain and Behavior
Volume7
Issue number4
Pages (from-to)e00674
ISSN1601-1848
DOIs
Publication statusPublished - Apr 2017

    Research areas

  • Adult, Brain, Emotions, Female, Humans, Male, Mental Recall, Middle Aged, Neuropsychological Tests, Piperidines, Positron-Emission Tomography, Radiopharmaceuticals, Receptors, Serotonin, 5-HT4, Speech Perception, Young Adult, Journal Article

ID: 51501105