In the first year of the U-PGx project, all relevant enabling tools for pre-emptive PGx testing have been designed, developed and implemented at the seven clinical sites of the U-PGx study. Thereafter, the U-PGx consortium has maintained, evaluated and improved the infrastructural basis for carrying out PGx testing and guideline-based clinical decision support. PGx quality management schemes were developed in cooperation with the European Molecular Genetics Quality Network (EMQN). PGx guidelines were continuously updated, translated and validated. Specific education was developed and provided to all stakeholder groups healthcare professionals, medical and pharmacy students, and persons that do not have any scientific or medical training.
In the next phase of the U-PGx project, the U-PGx clinical study has been set up and executed in multiple clinical sites in seven European countries (the Netherlands, United Kingdom, Austria, Italy, Spain, Greece, and Slovenia). In this PREPARE (Preemptive Pharmacogenomic Testing for Preventing Adverse Drug Reactions) study, a total of 6,944 patients have been included and clinical and follow-up data of all patients as well as patient-reported outcomes have been collected. After independent project monitoring, the final dataset was prepared and severity and causality analysis have been executed. In addition, the key features that are required for the cost-effectiveness analysis of the PGx-guided interventions in all seven clinical sites have been established and a standard cost-effectiveness model for the economic analysis has been generated. The final clinical and economic outcomes of the PREPARE study are expected in 2022.
For the U-PGx substudy ’A Next Step into the Future’, pharmacometric and systems pharmacology models to predict the consequences of drug-drug and drug-gene interactions have been developed and reported. An analytical mass spectrometry LC-MS/MS panel has been established to measure blood plasma concentrations of selected drugs and corresponding metabolites in subjects with extreme phenotype. The comparison of blood concentrations with PBPK model predictions is ongoing. Drug-drug interaction (DDI) data have been provided from the PREPARE study and is currently being systematically analysed.
Within this same substudy, a pipeline to retrieve PGx information from whole exome sequencing data has been established. Novel algorithms have been developed and applied for computational prediction methods that allow evaluation of the functional consequences of amino acid sequence alterations in drug metabolizing enzymes and transporters. GWAS analyses using gDNA of extreme phenotype patients showed preliminary linkage of novel mutations in 2-13 different genes to the drug ADRs. However, due to the low number of patients available for analyses, no statistical conclusions could be drawn.
The main ethical, legal and social issues (ELSI) that relate to the clinical PGx implementation have been studied and guidelines have been established and published. ELSI training has been provided to both U-PGx and non-U-PGx members. Furthermore, various U-PGx dissemination activities have been organized according to the needs of the various stakeholders such as healthcare professionals, regulators, policy makers, insurance bodies, patients and the general public. The final U-PGx Personalised Medicine Symposium, which will also present the final outcomes of the PREPARE study, will be organized in 2022.