• Anesthesia and analgesia · Dec 2024

    The Influence of Pharmacogenetic Factors on the Pharmacokinetics of Morphine and Its Metabolites in Pediatric Patients: A Systematic Review.

    • Kheireddin Mufti, José Eduardo Juárez-Hernández, Niloofar Gheshlaghi, Jessica M Lovnicki, S Rod Rassekh, RossColin J DCJDFrom the BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada.Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada.Faculty of Pharmaceutical Scie, Bruce C Carleton, and Catrina M Loucks.
    • From the BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada.
    • Anesth. Analg. 2024 Dec 6.

    AbstractMorphine is a potent analgesic used for treating surgical and cancer pain. Despite being the drug of choice for the management of severe pain in children, the high interindividual variability in morphine pharmacokinetics limits its clinical utility to effectively relieve pain without adverse effects. This review was conducted to identify and describe all studies that have assessed the effect of genetic factors on the pharmacokinetics of morphine and its main metabolites in children. Embase and Medline databases were used to conduct the literature search, and the systematic review was conducted in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Of the 188 articles screened and after the application of specific inclusion and exclusion criteria, the review identified 8 studies. These studies suggest that genetic variants of selected metabolic enzymes and transporters may play a role in the observed interindividual variability in morphine plasma concentrations. Variants of the genes SLC22A1 and ABCC3 had the most supporting evidence for genetic variants that influence morphine and morphine metabolites pharmacokinetics. Although the available evidence suggests a potential genetic contribution to the variability in morphine concentration, the heterogeneity of the included studies in terms of experimental design and small sample sizes in some studies makes it challenging to propose the use of genetic biomarkers to personalize morphine dosing. This underscores the need to conduct more comprehensive and large-scale pharmacokinetic-pharmacogenetic studies to determine how or if genetic testing can optimize morphine safety and effectiveness in children.Copyright © 2024 International Anesthesia Research Society.

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