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Detecting Somatic Genetic Alterations in Tumor Specimens by Exon Capture and Massively Parallel Sequencing
Published on: October 19, 2013
Systematic analysis of somatic mutations in phosphorylation signaling predicts novel cancer drivers
1The Donnelly Centre, University of Toronto, Toronto, Canada. Juri.Reimand@utoronto.ca
Abstract:
Large-scale cancer genome sequencing has uncovered thousands of gene mutations, but distinguishing tumor driver genes from functionally neutral passenger mutations is a major challenge. We analyzed 800 cancer genomes of eight types to find single-nucleotide variants (SNVs) that precisely target phosphorylation machinery, important in cancer development and drug targeting. Assuming that cancer-related biological systems involve unexpectedly frequent mutations, we used novel algorithms to identify genes with significant phosphorylation-associated SNVs (pSNVs), phospho-mutated pathways, kinase networks, drug targets, and clinically correlated signaling modules. We highlight increased survival of patients with TP53 pSNVs, hierarchically organized cancer kinase modules, a novel pSNV in EGFR, and an immune-related network of pSNVs that correlates with prolonged survival in ovarian cancer. Our findings include multiple actionable cancer gene candidates (FLNB, GRM1, POU2F1), protein complexes (HCF1, ASF1), and kinases (PRKCZ). This study demonstrates new ways of interpreting cancer genomes and presents new leads for cancer research.
Insights
Analyzing 800 cancer genomes, this study identifies phosphorylation-associated single-nucleotide variants (pSNVs) crucial for cancer development. These findings reveal novel therapeutic targets and biomarkers for improved patient survival.
Area of Science:
- Genomics
- Cancer Biology
- Molecular Oncology
Background:
- Distinguishing cancer driver mutations from passenger mutations is critical for targeted therapy.
- Phosphorylation machinery plays a key role in cancer development and represents a potential drug target.
Purpose of the Study:
- To identify single-nucleotide variants (SNVs) targeting cancer phosphorylation machinery.
- To discover novel cancer driver genes, pathways, and therapeutic targets through analysis of phosphorylation-associated SNVs (pSNVs).
Main Methods:
- Analysis of 800 cancer genomes across eight cancer types.
- Application of novel algorithms to detect significant pSNVs, phospho-mutated pathways, and kinase networks.
- Correlation of identified mutations with clinical data and patient survival.
Main Results:
- Identification of TP53 pSNVs associated with increased patient survival.
- Discovery of a novel pSNV in EGFR and an immune-related pSNV network linked to prolonged ovarian cancer survival.
- Pinpointing actionable cancer gene candidates, protein complexes, and kinases, including FLNB, GRM1, POU2F1, HCF1, ASF1, and PRKCZ.
Conclusions:
- Novel methods for interpreting cancer genomes by focusing on phosphorylation machinery.
- Identification of new leads for cancer research, including potential therapeutic targets and biomarkers.
- Demonstration of the clinical relevance of pSNVs in predicting patient outcomes.
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