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Updated: Dec 28, 2025
A Streamlined Approach for Mass Spectrometry-Based Proteomics Using Selected Tissue Regions
Published on: April 18, 2025
Accelerated Protein Biomarker Discovery from FFPE Tissue Samples Using Single-Shot, Short Gradient Microflow SWATH MS
Rui Sun1,2, Christie Hunter3, Chen Chen4
1Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University, 18 Shilongshan Road, Hangzhou, Zhejiang 310024, China.
A new 15-minute microflow liquid chromatography-parallel reaction monitoring high-resolution mass spectrometry (SWATH MS) method accelerates protein biomarker discovery in clinical samples. This method significantly reduces instrument time while maintaining high quantitative consistency and diagnostic accuracy for prostate cancer.
Area of Science:
- Proteomics
- Biomarker Discovery
- Mass Spectrometry
Background:
- Accelerating protein biomarker discovery in clinical samples is crucial for advancing personalized medicine.
- Existing methods often require extensive instrument time, limiting large-scale application.
- Standardized and efficient proteomic workflows are needed for reproducible clinical research.
Purpose of the Study:
- To develop and evaluate a microflow, single-shot, short gradient SWATH MS method for rapid protein biomarker discovery and verification.
- To assess the performance of the accelerated method in terms of speed, quantitative accuracy, and batch effect reduction.
- To validate the identified protein biomarkers for their ability to distinguish between benign and malignant prostate tissues.
Main Methods:
- A 15-minute gradient microflow-LC peptide separation coupled with SWATH MS was employed.
- Optimized SWATH MS window configuration and OpenSWATH software were used for data analysis.
- The method was applied to 204 FFPE tissue samples from prostate cancer and benign hyperplasia patients.
Main Results:
- The accelerated method identified 27,975 proteotypic peptides and 4037 proteins, quantifying 80% of proteins identified by a 2-hour gradient method while using only 17% of the instrument time.
- High quantitative consistency was observed between the accelerated and reference methods (r = 0.77).
- Batch effects were reduced by 21%, and 75 deregulated proteins were identified and validated for distinguishing benign from malignant tissues (AUC = 0.99).
Conclusions:
- The 15-minute gradient microflow SWATH MS method significantly accelerates large-scale proteomic data acquisition by six times.
- The method demonstrates high quantitative consistency and reduced batch effects compared to longer gradient methods.
- The identified protein biomarkers are effective in separating benign and malignant prostate tissues, highlighting the method's clinical applicability.
