Quantitative profiling of single formalin fixed tumour sections: Proteomics for translational research

Christopher S. Hughes, Melissa K. Mcconechy, Dawn R. Cochrane, Tayyebeh Nazeran, Anthony Karnezis, David G. Huntsman, Gregg B. Morin

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

Although re-sequencing of gene panels and mRNA expression profiling are now firmly established in clinical laboratories, in-depth proteome analysis has remained a niche technology, better suited for studying model systems rather than challenging materials such as clinical trial samples. To address this limitation, we have developed a novel and optimized platform called SP3-Clinical Tissue Proteomics (SP3-CTP) for in-depth proteome profiling of practical quantities of tumour tissues, including formalin fixed and paraffin embedded (FFPE). Using single 10 μm scrolls of clinical tumour blocks, we performed in-depth quantitative analyses of individual sections from ovarian tumours covering the high-grade serous, clear cell, and endometrioid histotypes. This examination enabled the generation of a novel high-resolution proteome map of ovarian cancer histotypes from clinical tissues. Comparison of the obtained proteome data with large-scale genome and transcriptome analyses validated the observed proteome biology for previously validated hallmarks of this disease, and also identified novel protein features. A tissue microarray analysis validated cystathionine gamma-lyase (CTH) as a novel clear cell carcinoma feature with potential clinical relevance. In addition to providing a milestone in the understanding of ovarian cancer biology, these results show that in-depth proteomic analysis of clinically annotated FFPE materials can be effectively used as a biomarker discovery tool and perhaps ultimately as a diagnostic approach.

Original languageEnglish (US)
Article number34949
JournalScientific Reports
Volume6
DOIs
StatePublished - Oct 7 2016
Externally publishedYes

ASJC Scopus subject areas

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    Hughes, C. S., Mcconechy, M. K., Cochrane, D. R., Nazeran, T., Karnezis, A., Huntsman, D. G., & Morin, G. B. (2016). Quantitative profiling of single formalin fixed tumour sections: Proteomics for translational research. Scientific Reports, 6, [34949]. https://doi.org/10.1038/srep34949