DNA methylation biomarkers for lung cancer

Tibor A. Rauch, Zunde Wang, Xiwei Wu, Kemp H. Kernstine, Arthur D. Riggs, Gerd P. Pfeifer

Research output: Contribution to journalArticle

83 Scopus citations

Abstract

Changes in DNA methylation patterns are an important characteristic of human cancer including lung cancer. In particular, hypermethylation of CpG islands is a signature of malignant progression. Methylated CpG islands are promising diagnostic markers for the early detection of cancer. However, the full extent and sequence context of DNA hypermethylation in lung cancer has remained unknown. We have used the methylated CpG island recovery assay and highresolution microarray analysis to find hypermethylated CpG islands in squamous cell carcinomas (SCC) and adenocarcinomas of the lung. Each tumor contained several hundred hypermethylated CpG islands. In an initial microarray screen, 36 CpG islands were methylated in five of five (0100%) of the SCC tumors tested and 52 CpG islands were methylated in at least 75% of the adenocarcinomas tested (n08). Using sodium-bisulfite-based approaches, 12 CpG islands (associated with the BARHL2, EVX2, IRX2, MEIS1, MSX1, NR2E1, OC2, OSR1, OTX1, PAX6, TFAP2A, and ZNF577 genes) were confirmed to be methylated in 85% to 100% of the squamous cell carcinomas and 11 CpG islands (associated with the CHAD, DLX4, GRIK2, KCNG3, NR2E1, OSR1, OTX1, OTX2, PROX1, RUNX1, and VAX1 genes) were methylated in >80% of the adenocarcinomas. From the list of genes that were methylated in lung adenocarcinomas, we identified the gene FAT4 and found that this gene was methylated in 39% of the tumors. FAT4 is the closest mammalian homologue of the Drosophila tumor suppressor Fat which is an important component of the Hippo growth control pathway. Many of these newly discovered methylated CpG islands hold promise for becoming biomarkers for the early detection of lung cancer.

Original languageEnglish (US)
Pages (from-to)287-296
Number of pages10
JournalTumor Biology
Volume33
Issue number2
DOIs
StatePublished - Apr 1 2012

Keywords

  • CpG islands
  • DNA methylation
  • FAT4
  • Lung cancer
  • Methylation marker

ASJC Scopus subject areas

  • Cancer Research

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  • Cite this

    Rauch, T. A., Wang, Z., Wu, X., Kernstine, K. H., Riggs, A. D., & Pfeifer, G. P. (2012). DNA methylation biomarkers for lung cancer. Tumor Biology, 33(2), 287-296. https://doi.org/10.1007/s13277-011-0282-2