Machine learning–integrated electrochemical sensing of ciprofloxacin for digital point-of-care therapeutic drug monitoring
摘要
Timely and precise therapeutic drug monitoring (TDM) is critical for managing pharmacokinetic variability and optimizing individualized therapy, particularly during public health crises such as the COVID-19 pandemic. Herein, we optimized integrated machine learning (ML) with an electrochemical sensor for accurate, non-invasive quantification of ciprofloxacin (CFX) drug in human urine for digital health-care settings. Synthesis of a dual molecularly imprinted polymer (duMIP) matrix is described via electropolymerization of chitosan (Chit) and poly(ortho-phenylenediamine) (poly(o-PD)) with CFX as a template, coated onto nitrogen-doped cerium oxide (CeO2 − xNx) nanomaterial. The duMIP forms three-dimensional (3D) recognition cavities for selective target CFX rebinding, while CeO2 − xNx enhances catalytic electron transfer. The sensor demonstrated a therapeutically relevant linear range of 5–90 µg mL⁻1, with a detection limit of 1.23 µg mL⁻1, and a limit of quantification of 1.49 µg mL⁻1, high sensitivity (31.019 µA µg⁻1 cm⁻2), and excellent specificity confirmed by amperometric (I–t) measurements. Recoveries of 91.3% to 106.3% in real human urine confirmed analytical accuracy in complex biological matrices. The ML models, including multi-layer perceptron (MLP), support vector machine (SVM), decision tree (DT), and random forest (RF), were trained on 2.5 million features extracted from I–t (current–time) measurements. The MLP model achieved the highest predictive accuracy (91.74%), with a precision-recall score of 0.956 and an AUC of 0.980. These findings highlight the potential of combining MLP-driven analytics with the duMIP/CeO2 − xNx/SPCE platform as a robust solution for real-time, digital point-of-care TDM (PoC–TDM) of CFX and improved therapeutic outcomes.
Graphical Abstract