Study HighlightsWHAT IS THE CURRENT KNOWLEDGE ON THE TOPIC? Drug interactions involving CYP3A4 induction are well documented, and the differentiation of none, weak, moderate, and strong inducers usually requires the use of probe drugs (e.g., midazolam) and biomarkers (e.g., plasma 4β-hydroxycholesterol/ cholesterol ratio). However, such tools are not always able to differentiate the induction of gut vs. liver CYP3A4.
WHAT QUESTION DID THIS STUDY ADDRESS? Is it possible to leverage plasma-derived sEVs as liquid biopsy, to facilitate liver and nonliver CYP3A4 expression profiling, following the 14-day administration of a weak to moderate inducer like modafinil?WHAT DOES THIS STUDY ADD TO OUR KNOW-LEDGE? One can profile plasma-derived sEVs and differentiate liver vs. nonliver CYP3A4 induction following modafinil.
HOW MIGHT THIS CHANGE CLINICAL PHARMA-COLOGY OR TRANSLATIONAL SCIENCE? Plasma-derived sEVs can facilitate the study of CYP3A4 induction, as it is possible to use sEVs proteomic data to predict plasma area under the plasma concentration-time curve ratios (AUCRs) for different victim drugs. Importantly, weak to moderate CYP3A4 inducers (e.g., modafinil) can be differentiated from strong inducers (e.g., rifampicin) using the approach.