Workflow for Protein Biomarker Discovery Using LC/MS System

This technical report presents a proof-of-concept study focused on protein biomarker discovery using the Agilent 6495D Triple Quadrupole LC/MS system. The study outlines a rapid and economical workflow that enables the development of comprehensive multiple reaction monitoring (MRM)-based assays without the need for extensive proteome identifications. Utilizing human plasma samples, the report details the methodology employed, including the use of publicly available peptide MS/MS spectral libraries and Skyline software. Key features of the Agilent 6495D system are highlighted, such as improved analytical sensitivity and faster MS acquisition times. The results indicate that this workflow can effectively discover protein biomarkers in complex biological samples, demonstrating the potential for quick assay development and reliable quantification. The study also includes a cohort analysis of plasma samples from 40 normal human subjects, providing insights into the reproducibility and accuracy of the method developed. Overall, this report documents a significant advancement in the field of biomarker discovery.