1. Pharmacogenotyping disproves genetic cause of drug-related problems in family history: a case report.
- Author
-
Bollinger A, Hersberger KE, Meyer Zu Schwabedissen HE, Allemann SS, and Stäuble CK
- Subjects
- Humans, Female, Child, Propofol adverse effects, Cytochrome P-450 CYP2B6 genetics, Pharmacogenomic Testing, Pharmacogenetics methods, Medical History Taking, Analgesics, Opioid adverse effects, Hypnotics and Sedatives adverse effects, Codeine adverse effects, Tramadol adverse effects, Cytochrome P-450 CYP2D6 genetics
- Abstract
Background: In clinical practice, family medication history is not routinely assessed as part of a patient's family health history (FHH). The information is self-reported and can depend on the individual's subjective perception. To illustrate how pharmacogenetic (PGx) testing results could be used to validate self-reported family medication history on drug-related problems (DRP), as well as to inform medication-related decisions, we herein present a case involving ten members of the same family., Case Presentation: Prior to a planned surgery, a preemptive PGx panel test was performed for a nine-year-old girl due to self-reported family medication history. The PGx panel test was also performed for her three siblings, parents, and grandparents. The focus was directed to the paternal grandmother, as she reported DRP from the hypnotic agent propofol, and to the maternal grandmother, as she described DRP after the administration of codeine and tramadol. A commercial PGx panel test of 100 variations in 30 different genes was conducted and analyzed focusing on genetic variants in cytochrome P450 enzyme 2B6 (CYP2B6), and CYP2D6 as they are involved in the biotransformation of propofol and the bioactivation of codeine and tramadol, respectively. The girl was identified as (1) CYP2B6 intermediate metabolizer (IM) with reduced enzyme activity and (2) CYP2D6 poor metabolizer (PM) with no enzyme activity. Regarding the planned surgery, it was recommended (1) to carefully titrate propofol dosage with increased monitoring of potential DRP and (2) to avoid opioids whose activation is mediated by CYP2D6 (e.g. codeine and tramadol). Further PGx testing revealed (1) the paternal grandmother as CYP2B6 normal metabolizer (NM) and (2) the maternal grandmother as CYP2D6 NM., Conclusion: The original trigger for PGx testing was the self-reported, conspicuous family medication history of DRP reported by the grandmothers. However, the girl's genotype predicted phenotypes of CYP2B6 IM and CYP2D6 PM, differed from the grandmothers'. With this exemplary case, we propose that hereditary concerns based on self-reported information on DRP should be verified by a PGx panel test, when the respective drug exhibits a PGx association. Also, the girl's PGx testing results provided important medication recommendations, which were considered perioperatively by the anesthetist suggesting to use PGx testing results preemptively to inform medication-related decisions., Competing Interests: Declarations Ethics approval and consent to participate All ten patients provided written informed consent to use the data for research purposes. The six adult patients were part of the observational study “Pharmacogenetic Testing of Patients with unwanted Adverse Drug Reactions or Therapy Failure”, which was conducted according to the guidelines of the Declaration of Helsinki and approved by the local ethics committee of “Ethikkommission Nordwest- und Zentralschweiz” (2019 − 01452, 31.10.2019). Consent for publication All ten patients provided written informed consent for publishing this case report. Competing interests The authors declare no competing interests., (© 2024. The Author(s).)
- Published
- 2024
- Full Text
- View/download PDF