Systematic optimization of targeted and multiplexed MS-based screening workflows for protein biomarkers
Khanal N, Chen Z, Alelyunas Y, et al. | Bioanalysis, 14(6), 341-356, (2022)
Keywords: • biomarkers • large molecule • LC–MS • matrix effects • method development • proteins • sample preparation
Background: The capability of targeted MS-based methods to simultaneously measure multiple analytes with high selectivity and sensitivity greatly facilitates the discovery and quantitation of novel biomarkers. However, the complexity of biological samples is a major bottleneck that requires extensive sample preparation. Results: This paper reports a generic workflow to optimize surrogate peptide-based protein biomarker screening for seven human proteins in a multiplexed manner without the need for any specific affinity reagents. Each step of the sample processing and LC–MS methods is systematically assessed and optimized for better analytical performance. Conclusion: The established method is used for the screening of multiple myeloma patient samples to determine which proteins could be robustly measured and serve as potential biomarkers of the disease.
