P‐Glycoprotein Antibody Decorated Porous Hydrogel Particles for Capture and Release of Drug‐Resistant Tumor Cells

Abstract Multidrug resistance is one of the leading causes of chemotherapy failure in cancer patients. Early detection and capture of drug‐resistant tumor cells can facilitate the monitoring of the therapy process and improve the prognosis of patients. In this study, novel P‐glycoprotein (P‐gp) antibody modified porous hydrogel particles are proposed for drug‐resistant tumor cells capture. The hydrogel particles employ a highly biocompatible hydrogel, methacrylate gelatin (GelMA), as the carrier and replicate from the silica colloidal crystal beads. By the modification of P‐gp antibody probes on their surfaces, the hydrogel particles are endowed with the ability to capture drug‐resistant tumor cells, which overexpress specific components of P‐gp on their membranes. Additionally, the acquired ordered porous nanostructure of the particles can provide not only more surface area for antibody immobilization but also a nanopatterned platform for highly efficient target cell capture. The above advantages make the porous hydrogel particles ideal for efficient capture and detection of the drug‐resistant tumor cells, which can be expected to facilitate the point‐of‐care pharmacotherapy and promisingly improve the patient outcomes.