Breast Cancer Classification Based on Proteotypes Obtained by SWATH Mass Spectrometry
Schubert, Olga T.
Ebhardt, H. Alexander
- Journal Article
Rights / licenseCreative Commons Attribution 4.0 International
Accurate classification of breast tumors is vital for patient management decisions and enables more precise cancer treatment. Here, we present a quantitative proteotyping approach based on sequential windowed acquisition of all theoretical fragment ion spectra (SWATH) mass spectrometry and establish key proteins for breast tumor classification. The study is based on 96 tissue samples representing five conventional breast cancer subtypes. SWATH proteotype patterns largely recapitulate these subtypes; however, they also reveal varying heterogeneity within the conventional subtypes, with triple negative tumors being the most heterogeneous. Proteins that contribute most strongly to the proteotype-based classification include INPP4B, CDK1, and ERBB2 and are associated with estrogen receptor (ER) status, tumor grade status, and HER2 status. Although these three key proteins exhibit high levels of correlation with transcript levels (R > 0.67), general correlation did not exceed R = 0.29, indicating the value of protein-level measurements of disease-regulated genes. Overall, this study highlights how cancer tissue proteotyping can lead to more accurate patient stratification. Show more
Journal / seriesCell Reports
Pages / Article No.
SubjectBreast cancer; Proteomics; Tumor classification; Tissue; SWATH-MS; Data independent acquisition; Transcriptomics
166435 - MitoModules: Biomarkers in context (SNF)
670821 - Proteomics 4D: The proteome in context (EC)
MoreShow all metadata