Oncogenic pathway combinations predict clinical prognosis in gastric cancer.


Journal Article

Many solid cancers are known to exhibit a high degree of heterogeneity in their deregulation of different oncogenic pathways. We sought to identify major oncogenic pathways in gastric cancer (GC) with significant relationships to patient survival. Using gene expression signatures, we devised an in silico strategy to map patterns of oncogenic pathway activation in 301 primary gastric cancers, the second highest cause of global cancer mortality. We identified three oncogenic pathways (proliferation/stem cell, NF-kappaB, and Wnt/beta-catenin) deregulated in the majority (>70%) of gastric cancers. We functionally validated these pathway predictions in a panel of gastric cancer cell lines. Patient stratification by oncogenic pathway combinations showed reproducible and significant survival differences in multiple cohorts, suggesting that pathway interactions may play an important role in influencing disease behavior. Individual GCs can be successfully taxonomized by oncogenic pathway activity into biologically and clinically relevant subgroups. Predicting pathway activity by expression signatures thus permits the study of multiple cancer-related pathways interacting simultaneously in primary cancers, at a scale not currently achievable by other platforms.

Full Text

Cited Authors

  • Ooi, CH; Ivanova, T; Wu, J; Lee, M; Tan, IB; Tao, J; Ward, L; Koo, JH; Gopalakrishnan, V; Zhu, Y; Cheng, LL; Lee, J; Rha, SY; Chung, HC; Ganesan, K; So, J; Soo, KC; Lim, D; Chan, WH; Wong, WK; Bowtell, D; Yeoh, KG; Grabsch, H; Boussioutas, A; Tan, P

Published Date

  • October 2, 2009

Published In

Volume / Issue

  • 5 / 10

Start / End Page

  • e1000676 -

PubMed ID

  • 19798449

Pubmed Central ID

  • 19798449

Electronic International Standard Serial Number (EISSN)

  • 1553-7404

International Standard Serial Number (ISSN)

  • 1553-7390

Digital Object Identifier (DOI)

  • 10.1371/journal.pgen.1000676


  • eng