Overexpression of interleukin-32α promotes invasion by modulating VEGF in hepatocellular carcinoma

  • Authors:
    • Wen-Bo Zhao
    • Quan-Li Wang
    • Yan-Tian Xu
    • Shi-Feng Xu
    • Yang Qiu
    • Feng Zhu
  • View Affiliations

  • Published online on: December 19, 2017     https://doi.org/10.3892/or.2017.6162
  • Pages: 1155-1162
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Abstract

Interleukin-32α (IL-32α) was reported to exhibit pluripotent pro-inflammatory properties. Recent studies indicate that it promotes the migration and invasion of cancers. We detected the expression of IL-32 in hepatocellular carcinoma (HCC) tissues and investigated its role in tumor angiogenesis and invasion. IL-32α expression in HCC was evaluated by real-time PCR, western blot analysis and immunohistochemical (IHC) staining. Secreted serum IL-32α and VEGF concentrations were detected using a custom-made sandwich ELISA. Furthermore, IL-32α was knocked down in HCC cell lines using siRNA and the cell migration and invasion abilities were assessed. IHC staining showed that IL32α-positive particles were mainly located in the cytoplasm of cancer cells, and it was significantly upregulated in the tumor tissues compared with that in peritumoral tissues. Notably, IL-32α was strongly expressed in perivascular areas. The mean serum concentration of IL-32α in HCC patients was significantly higher than that in the control group (571.45±102.28 vs. 144.60±51.172 pg/ml; P<0.01). Real-time RT-PCR showed that IL-32α mRNA was significantly overexpressed in HCC tumor tissues (IL-32/β-actin, 15.59±7.8 vs. 3.37±0.47; P<0.01). The in vitro results indicated that IL-32α knockdown inhibited the activation of VEGF-STAT3 signaling in HCC tumor cell lines. IL-32α expression was correlated with clinical relevance in HCC tumor tissues. It is strongly suggested that IL-32α may be a potential predictor of anti-angiogenesis therapy and prognosis of HCC.
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March-2018
Volume 39 Issue 3

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Zhao W, Wang Q, Xu Y, Xu S, Qiu Y and Zhu F: Overexpression of interleukin-32α promotes invasion by modulating VEGF in hepatocellular carcinoma. Oncol Rep 39: 1155-1162, 2018.
APA
Zhao, W., Wang, Q., Xu, Y., Xu, S., Qiu, Y., & Zhu, F. (2018). Overexpression of interleukin-32α promotes invasion by modulating VEGF in hepatocellular carcinoma. Oncology Reports, 39, 1155-1162. https://doi.org/10.3892/or.2017.6162
MLA
Zhao, W., Wang, Q., Xu, Y., Xu, S., Qiu, Y., Zhu, F."Overexpression of interleukin-32α promotes invasion by modulating VEGF in hepatocellular carcinoma". Oncology Reports 39.3 (2018): 1155-1162.
Chicago
Zhao, W., Wang, Q., Xu, Y., Xu, S., Qiu, Y., Zhu, F."Overexpression of interleukin-32α promotes invasion by modulating VEGF in hepatocellular carcinoma". Oncology Reports 39, no. 3 (2018): 1155-1162. https://doi.org/10.3892/or.2017.6162