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Expression of microRNA miR-126 and miR-200c is associated with prognosis in patients with non-small cell lung cancer

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Abstract

MicroRNAs (miRNAs) are short non-coding RNAs that exert a critical influence on tumorigenesis through post-transcriptional modification and are considered to be potential biomarkers for the diagnosis or prognosis of various cancers. Although several miRNAs have been proposed as relevant biomarkers for non-small cell lung cancer (NSCLC), detailed working mechanisms and validated prognostic significance of these miRNAs remain controversial. In this study, we evaluated expression levels of miRNA-126 (miR-126) and miR-200c in 72 NSCLCs and 30 benign lung tissues by quantitative reverse transcription polymerase chain reaction (qRT-PCR) and analyzed the correlation of miRNA expression with a variety of clinicopathological factors and patient survival. Compared with the benign control group, miR-126 expression was significantly downregulated in NSCLCs (p < 0.001), while miR-200c expression was significantly upregulated in NSCLCs (p < 0.001). The expression of miR-126 was significantly higher in NSCLCs with a tumor size of ≤3 cm than in those with a tumor size of >3 cm (p = 0.026). There were no other significant associations between miRNA expression and clinicopathological features. In univariate survival analysis for all NSCLC patients, high miR-200c expression (p = 0.037), large tumor size (p = 0.026), and lymphovascular invasion (p = 0.012) were significantly correlated with worse overall survival. High miR-126 expression was significantly associated with favorable prognosis only in patients with adenocarcinoma (p = 0.033). In multivariate analysis, miR-200c and tumor size remained as independent prognostic factors. Our results suggest that miR-126 might play tumor-suppressive and miR-200c an oncogenic role, and these miR’s are potential prognostic biomarkers for NSCLC.

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Conflict of interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Department of Clinical Laboratory Science, Gimhae College, Gimhae, South Korea

    Mi Kyeong Kim & Sang Bong Jung

  2. Department of Anatomy, Kosin University College of Medicine, Busan, South Korea

    Jong-Sik Kim

  3. Department of Pathology, Dong-A University College of Medicine, Busan, South Korea

    Mee Sook Roh

  4. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, South Korea

    Ji Hyun Lee

  5. Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, 50, Hapsung-dong, Masan Hoewon-gu, Changwon, 630-723, South Korea

    Eun Hee Lee & Hyoun Wook Lee

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  1. Mi Kyeong Kim
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  3. Jong-Sik Kim
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Correspondence to Hyoun Wook Lee.

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Kim, M.K., Jung, S.B., Kim, JS. et al. Expression of microRNA miR-126 and miR-200c is associated with prognosis in patients with non-small cell lung cancer. Virchows Arch 465, 463–471 (2014). https://doi.org/10.1007/s00428-014-1640-4

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  • DOI: https://doi.org/10.1007/s00428-014-1640-4

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