Analysis of the new gene in connection with permeation of the lung adenocarcinoma in the genome PCR method and the FISH method

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Genetic abnormality in early-stage lung adenocarcinoma was examined to search for new prognostic biomarkers. In situ lung adenocarcinomas and small but invasive adenocarcinomas were examined by array-comparative genomic hybridization (array-CGH), and candidate genes of interest were screened. To examine gene abnormalities, various types of lung carcinoma were examined by quantitative real-time genomic PCR (qPCR) and immunohistochemistry (IHC). Array-CGH demonstrated frequent amplification at chromosome 3q26, and we focused on the epithelial cell transforming sequence 2 (ECT2) oncogene. Overexpression of ECT2 in invasive adenocarcinoma was associated with disease-free survival and overall survival of patients with lung adenocarcinoma. These results were verified using another set of early-stage adenocarcinomas resected at another hospital. Abnormality of the ECT2 gene would be applicable as a new biomarker for prognostication of patients with lung adenocarcinoma.