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Overexpression of LBX2 associated with tumor progression and poor prognosis in colorectal cancer

  • Authors:
    • Xiaodong Huang
    • Yujie Yang
    • Chao Yang
    • Huali Li
    • Huangrong Cheng
    • Yongbin Zheng
  • View Affiliations / Copyright

    Affiliations: Department of Gastrointestinal Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
    Copyright: © Huang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 3751-3760
    |
    Published online on: March 27, 2020
       https://doi.org/10.3892/ol.2020.11489
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Abstract

Colorectal cancer (CRC) is one of the most common carcinomas with high morbidity and mortality worldwide. However, the underlying molecular mechanisms of CRC are unclear. The aim of the present study was to establish the role that overexpression of LBX2 serves in CRC and to investigate the associated biological pathways. The difference in the expression levels of LBX2 between CRC tissues and adjacent normal colorectal tissues was assessed using the Oncomine database and Tumor Immune Estimation Resource. The expression levels of LBX2 and its prognostic significance in CRC were analyzed using a t‑test and χ2 test using data from The Cancer Genome Atlas database. The Kaplan‑Meier method and Cox regression analysis were used to estimate the prognostic value of LBX2 in CRC. Furthermore, the potential mechanisms of LBX2 dysregulation and its underlying molecular mechanisms in CRC were investigated using Gene Set Enrichment Analysis (GSEA). LBX2 expression levels were significantly upregulated in CRC samples compared with corresponding normal colorectal tissues (P<0.05). LBX2 upregulation was correlated with advanced tumor stage (III or IV), vascular invasion, lymphatic invasion and the male sex (all P<0.05). Kaplan‑Meier analyses showed that high expression levels of LBX2 were associated with a less favorable overall survival (OS) and disease‑free survival (DFS) in CRC (all P<0.05). Multivariate analyses further confirmed that LBX2 upregulation was an independent indicator of less favorable OS and DFS (all P<0.05). In addition, LBX2 DNA hypomethylation and microRNA (miR)‑378a‑3p downregulation correlated with LBX2 upregulation in CRC (all P<0.05). The downregulation of miR‑378a‑3p in CRC was also significantly associated with less favorable OS and DFS, as demonstrated using Kaplan‑Meier analyses (all P<0.05). Moreover, GSEA indicated that ‘VEGF signaling’, ‘Cell adhesion molecules CAMs’, ‘Toll‑like receptor signaling’ and ‘Natural killer cell‑mediated cytotoxicity’ signaling pathways were enriched in the high LBX2 expressing cohort (all P<0.05). Thus, overexpression of LBX2 may be associated with the development of CRC and may serve as a novel prognostic marker and therapeutic target in CRC. The mechanisms of LBX2 upregulation in CRC are possibly associated with LBX2 DNA hypomethylation and miR‑378a‑3p downregulation. The potential mechanisms of LBX2 upregulation in CRC might be regulated via the ‘Cell adhesion molecules CAMs’, ‘Toll‑like receptor signaling’ and ‘Natural killer cell‑mediated cytotoxicity’ signaling pathways.
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Copy and paste a formatted citation
Spandidos Publications style
Huang X, Yang Y, Yang C, Li H, Cheng H and Zheng Y: Overexpression of LBX2 associated with tumor progression and poor prognosis in colorectal cancer. Oncol Lett 19: 3751-3760, 2020.
APA
Huang, X., Yang, Y., Yang, C., Li, H., Cheng, H., & Zheng, Y. (2020). Overexpression of LBX2 associated with tumor progression and poor prognosis in colorectal cancer. Oncology Letters, 19, 3751-3760. https://doi.org/10.3892/ol.2020.11489
MLA
Huang, X., Yang, Y., Yang, C., Li, H., Cheng, H., Zheng, Y."Overexpression of LBX2 associated with tumor progression and poor prognosis in colorectal cancer". Oncology Letters 19.6 (2020): 3751-3760.
Chicago
Huang, X., Yang, Y., Yang, C., Li, H., Cheng, H., Zheng, Y."Overexpression of LBX2 associated with tumor progression and poor prognosis in colorectal cancer". Oncology Letters 19, no. 6 (2020): 3751-3760. https://doi.org/10.3892/ol.2020.11489
Copy and paste a formatted citation
x
Spandidos Publications style
Huang X, Yang Y, Yang C, Li H, Cheng H and Zheng Y: Overexpression of LBX2 associated with tumor progression and poor prognosis in colorectal cancer. Oncol Lett 19: 3751-3760, 2020.
APA
Huang, X., Yang, Y., Yang, C., Li, H., Cheng, H., & Zheng, Y. (2020). Overexpression of LBX2 associated with tumor progression and poor prognosis in colorectal cancer. Oncology Letters, 19, 3751-3760. https://doi.org/10.3892/ol.2020.11489
MLA
Huang, X., Yang, Y., Yang, C., Li, H., Cheng, H., Zheng, Y."Overexpression of LBX2 associated with tumor progression and poor prognosis in colorectal cancer". Oncology Letters 19.6 (2020): 3751-3760.
Chicago
Huang, X., Yang, Y., Yang, C., Li, H., Cheng, H., Zheng, Y."Overexpression of LBX2 associated with tumor progression and poor prognosis in colorectal cancer". Oncology Letters 19, no. 6 (2020): 3751-3760. https://doi.org/10.3892/ol.2020.11489
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