Polyurea‐Modified Magnetic Particles with Versatile Probes for Chemoselective Capture of Carbonyl Metabolites and Biomarker Discovery

Playing a great role in human physiologies and pathologies, carbonyl metabolites are intimately associated with a variety of diseases, though the effective analysis method of them remains a challenge. A hydrazide‐terminated polyurea‐modified magnetic particle (HPMP) with versatile probes is developed to address this issue. The capture ability of HPMPs for carbonyl metabolite is more than 1200 µmol g−1, which is increased by 4 orders of magnitude via the introduction of polyurea. With a broad linear range of over 4 orders of magnitude, remarkably improved sensitivity, and limit of detection at attomole quantities, HPMPs are applied in relative quantification of more than 1500 carbonyl metabolites in 113 human serum samples with high throughput and high coverage. The combined indicators of these metabolites demonstrates a great diagnostic accuracy for distinguishing between health and disease subjects as well as differentiating the patients with benign lung disease and lung cancer. Combining powerful capture ability, low‐cost preparation, and convenient operation, the HPMPs demonstrate extensive application in biomarker discovery and the detailed study of the biochemical landscape. Hydrazide‐terminated polyurea‐modified magnetic particles (HPMPs) with versatile probes are developed for chemoselective capture of carbonyl metabolites. Combining powerful capture ability, low‐cost preparation, and convenient operation, the HPMPs are applied in rapid quantification of more than 1500 carbonyl metabolites in 113 human serum samples with high throughput and high coverage, providing combined indicators with great diagnostic accuracy for lung cancer.