Identification of a multidimensional transcriptome prognostic signature for lung adenocarcinoma

BACKGROUND: Lung adenocarcinoma (LUAD) is one of the leading contributors to cancer‐related deaths worldwide. The objective of the current study is to identify a multidimensional transcriptome prognostic signature by combining protein‐coding gene (PCG) with long non‐coding RNA (lncRNA) for patients with LUAD. METHODS: We obtained LUAD PCG and lncRNA expression profile data from three datasets in the Gene Expression Omnibus database and conducted survival analyzes for these individuals. RESULTS: We established a predictive model comprising the three PCGs (NHLRC2, PLIN5, GNAI3), and one lncRNA (AC087521.1). This model segregated patients with LUAD into low‐ and high‐risk groups based on significant differences in survival in the training dataset (GSE31210, n = 226, log‐rank test P < .001). Risk stratification of the model was subsequently validated in other two test datasets (GSE37745, n = 106, log‐rank test P < .001; GSE30219, n = 85, log‐rank test P = .006). Time‐dependent receiver operating characteristic (timeROC) curve analysis demonstrated that the model correlated strongly with disease progression and outperformed pathological stage in terms of prognostic ability. Cox proportional hazards regression analysis revealed that the signature could serve as an independent predictor of clinical outcomes in patients with LUAD. CONCLUSIONS: We describe a novel multidimensional transcriptome signature that can predict survival probabilities in patients with LUAD.