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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Authors | Wen-Bo Zhao, Quan-Li Wang, Yan-Tian Xu, Shi-Feng Xu, Yang Qiu, Feng Zhu |
Journal | Oncology reports
(Oncol Rep)
Vol. 39
Issue 3
Pg. 1155-1162
(Mar 2018)
ISSN: 1791-2431 [Electronic] Greece |
PMID | 29286122
(Publication Type: Journal Article)
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Chemical References |
- Biomarkers, Tumor
- IL32 protein, human
- Interleukins
- VEGFA protein, human
- Vascular Endothelial Growth Factor A
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Topics |
- Apoptosis
- Biomarkers, Tumor
(genetics, metabolism)
- Carcinoma, Hepatocellular
(genetics, metabolism, pathology)
- Case-Control Studies
- Cell Movement
- Cell Proliferation
- Female
- Follow-Up Studies
- Gene Expression Regulation, Neoplastic
- Humans
- Interleukins
(genetics, metabolism)
- Liver Neoplasms
(genetics, metabolism, pathology)
- Male
- Neoplasm Invasiveness
- Neovascularization, Pathologic
(pathology)
- Prognosis
- Signal Transduction
- Tumor Cells, Cultured
- Vascular Endothelial Growth Factor A
(genetics, metabolism)
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