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Pharmacogenetics of Modafinil after sleep loss: Catechol-O-methyltransferase genotype modulates waking functions but not recovery sleep


Bodenmann, S; Xu, S; Luhmann, U; Arand, M; Berger, W; Jung, H; Landolt, H P (2009). Pharmacogenetics of Modafinil after sleep loss: Catechol-O-methyltransferase genotype modulates waking functions but not recovery sleep. Clinical Pharmacology and Therapeutics, 85(3):296-304.

Abstract

Sleep loss impairs waking functions and is homeostatically compensated in recovery sleep. The mechanisms underlying the consequences of prolonged wakefulness are unknown. The stimulant modafinil may promote primarily dopaminergic neurotransmission. Catechol-O-methyltransferase (COMT) catalyzes the breakdown of cerebral dopamine. A functional Val158Met polymorphism reduces COMT activity, and Val/Val homozygous individuals presumably have lower dopaminergic signaling in the prefrontal cortex than do Met/Met homozygotes. We quantified the contribution of this polymorphism to the effects of sleep deprivation and modafinil on subjective state, cognitive performance, and recovery sleep in healthy volunteers. Two-time 100 mg modafinil potently improved vigor and well-being, and maintained baseline performance with respect to executive functioning and vigilant attention throughout sleep deprivation in Val/Val genotype subjects but was hardly effective in subjects with the Met/Met genotype. Neither modafinil nor the Val158Met polymorphism affected distinct markers of sleep homeostasis in recovery sleep. In conclusion, dopaminergic mechanisms contribute to impaired waking functions after sleep loss.

Abstract

Sleep loss impairs waking functions and is homeostatically compensated in recovery sleep. The mechanisms underlying the consequences of prolonged wakefulness are unknown. The stimulant modafinil may promote primarily dopaminergic neurotransmission. Catechol-O-methyltransferase (COMT) catalyzes the breakdown of cerebral dopamine. A functional Val158Met polymorphism reduces COMT activity, and Val/Val homozygous individuals presumably have lower dopaminergic signaling in the prefrontal cortex than do Met/Met homozygotes. We quantified the contribution of this polymorphism to the effects of sleep deprivation and modafinil on subjective state, cognitive performance, and recovery sleep in healthy volunteers. Two-time 100 mg modafinil potently improved vigor and well-being, and maintained baseline performance with respect to executive functioning and vigilant attention throughout sleep deprivation in Val/Val genotype subjects but was hardly effective in subjects with the Met/Met genotype. Neither modafinil nor the Val158Met polymorphism affected distinct markers of sleep homeostasis in recovery sleep. In conclusion, dopaminergic mechanisms contribute to impaired waking functions after sleep loss.

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Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Pharmacology and Toxicology
07 Faculty of Science > Institute of Pharmacology and Toxicology

04 Faculty of Medicine > Center for Integrative Human Physiology
04 Faculty of Medicine > Institute of Medical Molecular Genetics
04 Faculty of Medicine > University Hospital Zurich > Clinic for Neurology
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Language:English
Date:March 2009
Deposited On:18 Dec 2008 11:14
Last Modified:17 Feb 2018 22:35
Publisher:Nature Publishing Group
ISSN:0009-9236
OA Status:Green
Publisher DOI:https://doi.org/10.1038/clpt.2008.222
PubMed ID:19037200

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