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Diagnostic and Prognostic Significance of Keap1 mRNA Expression for Lung Cancer Based on Microarray and Clinical Information from Oncomine Database

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Summary

We performed a bioinformatics analysis with validation by multiple databases, aiming to evaluate the diagnostic and prognostic value of Kelch-like ECH-associated protein 1 (Keap1) mRNA for lung cancer, and to explore possible mechanisms. Diagnostic performance of Keap1 mRNA was determined by receiver operating characteristic (ROC) curve analysis. Prognostic implication of Keap1 mRNA was estimated by Kaplan-Meier survival analysis. Co-expressed genes with both Keap1 and Nfe2L2 were identified by LinkedOmics. Mechanisms of Keap1-Nfe2L2-co-expressed genes underlying the pathogenesis of lung cancer were explored by function enrichment and pathway analysis. The ROC curve analysis determined a good diagnostic performance of Keap1 mRNA for lung squamous cell carcinoma (LUSC), with an area under the ROC curve (AUC) of 0.833, sensitivity of 72.7%, and specificity of 90.6% (P<0.001). Multivariate Cox regression recognized high Keap1 mRNA to be an independent risk factor of mortality for overall lung cancer [hazard ratio (HR): 11.034, P=0.044], but an independent antagonistic factor for lung adenocarcinoma (LUAD) (HR: 0.404, P<0.001). Validation by UALCAN and GEPIA supported Oncomine findings regarding the diagnostic value of Keap1 mRNA for LUSC, but denied its prognostic value. After screening, we identified 17 co-expressed genes with both Keap1 and Nfe2L2 for LUAD, and 22 for LUSC, mainly enriched in signaling pathway of oxidative stress-induced gene expression via Nrf2. In conclusion, Keap1 mRNA has a good diagnostic performance, but controversial prognostic efficacy for LUSC. The pathogenesis of lung cancer is associated with Keap1-Nfe2L2-co-expressed genes by signaling pathway of oxidative stress-induced gene expression via Nrf2.

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  1. The authors contributed equally to this work.

Authors and Affiliations

  1. Department of Infectious Diseases, Wuhan Jinyintan Hospital, Wuhan, 430023, China

    Guang-ya Liu & Shi-qian Wan

  2. Department of Critical Care Medicine, Wuhan Jinyintan Hospital, Wuhan, 430023, China

    Wei Zhang & Wen-juan Wu

  3. Department of Critical Care Medicine, Wuchang Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, 430063, China

    Xu-chi Chen

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  1. Guang-ya Liu
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  2. Wei Zhang
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Correspondence to Shi-qian Wan.

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Liu, Gy., Zhang, W., Chen, Xc. et al. Diagnostic and Prognostic Significance of Keap1 mRNA Expression for Lung Cancer Based on Microarray and Clinical Information from Oncomine Database. CURR MED SCI 41, 597–609 (2021). https://doi.org/10.1007/s11596-021-2378-2

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  • DOI: https://doi.org/10.1007/s11596-021-2378-2

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