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Minimal sample requirement for highly multiplexed protein quantification in cell lines and tissues by PCT-SWATH mass
Shiying Shao1,2, Tiannan Guo2, Chiek Ching Koh2
1Division of Endocrinology, Tongji Hospital, Huazhong University of Science & Technology, Wuhan, P. R. China.
Proteomics
|August 20, 2015
Summary
Pressure cycling technology (PCT)-assisted SWATH-MS enables proteomic quantification from minimal samples. This method accurately analyzes as few as 50,000 cells or 0.2 mg of tissue, enhancing translational research.
Area of Science:
- Proteomics
- Mass Spectrometry
- Biotechnology
Background:
- Limited sample availability hinders clinical and translational proteomic research.
- Biopsy-level tissue samples present challenges for proteomic quantification.
Purpose of the Study:
- To evaluate the minimal sample requirement for the pressure cycling technology (PCT)-assisted SWATH-MS method.
- To determine the feasibility of proteomic analysis using very small cell and tissue samples.
Main Methods:
- Integration of pressure cycling technology (PCT) for sample preparation.
- Application of SWATH-MS for reproducible proteomic quantification.
- Testing with various sample types: cultured cells (HeLa, K562, U251) and tissues (mouse liver, heart, brain, human kidney).
Main Results:
- As few as 50,000 cells or 0.2-0.5 mg of tissue yielded sufficient peptides for multiple SWATH-MS analyses.
- Reproducibility generally increased with decreasing tissue sample amounts.
- SWATH maps were highly consistent across varying sample sizes, showing similar peptide identification.
Conclusions:
- The minimal sample requirement for optimal PCT-SWATH analysis was determined.
- Smaller sample sizes led to higher quantitative accuracy in proteomic analysis.
- PCT-SWATH is a robust method for high-accuracy proteomics with limited clinical samples.
