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Biomarkers for the effects of cannabis and THC in healthy volunteers.

Lineke Zuurman, Annelies E Ippel, Eduard Moin, Joop van Gerven

British Journal of Clinical Pharmacology January 2009 DOI: 10.1111/j.1365-2125.2008.03329.x (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Systematic review Peer reviewed
Population Healthy volunteers
Interventions Cannabis Tetrahydrocannabinol (THC)
Topics Cannabis
Key findings Subjective effects and heart rate are currently the most reliable biomarkers for the acute effects of cannabis and THC in healthy volunteers, with subjective effects showing significant responses in almost all studies. Cannabis affected most CNS domains, with some domains suggesting depression at lower doses and stimulation at higher doses, but the wide variety of CNS tests used prevents reliable quantification of drug-response relationships.

Abstract

An increasing number of novel therapeutic agents are targeted at cannabinoid receptors. Drug development programmes of new cannabinoid drugs may be facilitated by the identification of useful biomarkers. This systemic literature review aims to assess the usefulness of direct biomarkers for the effects of cannabis and tetrahydrocannabinol (THC) in healthy volunteers. One hundred and sixty-five useful articles were found that investigated the acute effects of cannabis or THC on the central nervous system (CNS) and heart rate in healthy volunteers. Three hundred and eighteen tests (or test variants) were grouped in test clusters and functional domains, to allow their evaluation as a useful biomarker and to study their dose-response effects. Cannabis/THC affected a wide range of CNS domains. In addition to heart rate, subjective effects were the most reliable biomarkers, showing significant responses to cannabis in almost all studies. Some CNS domains showed indications of depression at lower and stimulation at higher doses. Subjective effects and heart rate are currently the most reliable biomarkers to study the effect of cannabis. Cannabis affects most CNS domains, but too many different CNS tests are used to quantify the drug-response relationships reliably. Test standardization, particularly in motor and memory domains, may reveal additional biomarkers.

Comparable studies

Other systematic reviews and meta-analyses on cannabis, most cited first.

Study Year Design Participants
Effects of cannabis use on outcomes of psychotic disorders: systematic review People with psychotic disorders, as examined in 13 longitudinal studies 2008 Systematic review
The Impact of Cannabis Use on Cognitive Functioning in Patients With Schizophrenia: A Meta-analysis of Existing Findings and New Data in a First-Episode Sample Patients with established schizophrenia (meta-analysis: 572) and patients with... 2010 Meta-analysis and cross-sectional observational study n = 700
Medicinal cannabis for psychiatric disorders: a clinically-focused systematic review 2020 Systematic review
Neuroimaging in cannabis use: a systematic review of the literature Cannabis users and controls in neuroimaging studies 2009 Systematic review
Human Laboratory Studies on Cannabinoids and Psychosis. Healthy human subjects and individuals with schizophrenia 2016 Systematic review

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