Employing TMT Quantification in a Shotgun-MS Platform
The blood serum proteome may be an ideal source of disease biomarkers, although its complexity necessitates novel strategies to enrich and quantify lower-abundance proteins with biomarker utility. Herein, serum samples from pre-diagnosis pancreatic cancer cases and controls were compared using a workflow of immunodepletion, multi-lectin fractionation, and peptide tandem mass tag (TMT) labeling. Samples were then subjected to SCX and high pH reversed-phase fractionation and analyzed by liquid chromatography tandem mass spectrometry (LC-MS/MS). The aim was the discovery of candidate serum biomarkers of pancreatic cancer, although the method is applicable to any comparative proteomic analysis of serum samples.
Key wordsProteomic profiling Serum Protein quantification LC-MS/MS Tandem mass tags (TMT) Mass spectrometry Pancreatic cancer
This work was funded by CRUK Project Grant C12077/A12790 and was supported by the National Institute for Health Research University College London Hospitals Biomedical Research Centre.
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