51561

IL23A

interleukin 23, alpha subunit p19;IL23A;interleukin 23, alpha subunit p19

IL-23 subunit alpha|IL-23-A|IL-23p19|JKA3 induced upon T-cell activation|interleukin 23 p19 subunit|interleukin-23 subunit alpha|interleukin-23 subunit p19|interleukin-six, G-CSF related factor

12q13.3

protein-coding

BACKGROUND: Hepatocellular carcinoma (HCC) is one of the most popular cancers in the world with poor prognosis, which often develops from chronic liver inflammatory diseases. Interleukin 23 (IL-23) is an inflammatory cytokine which is reported to play an important role in tumor development in animal model. While the function of IL-23 in HCC development remains unknown, so we investigate the role of IL-23 in HCC progression in this study. METHODOLOGY AND PRINCIPAL FINDING: Transcript level of IL-23, interleukin17A (IL-17A) and matrix metalloproteinases 9 (MMP9) in clinical HCC samples (n=81) was determined by qPCR. Protein expression pattern of IL-23 in primary and metastatic HCC tissues pairs (n=49 pairs) was determined by immunohistochemistry staining. Cell migration, invasion, RNA interfering and immune blotting were used to characterize the functional and signaling mechanisms in IL-23-treated HCC. Compared with paired non-tumor tissue, higher IL-23 expression was detected in HCC tumor tissues with metastasis. Immunohistochemistry staining confirmed the high expression of IL-23 in metastasis HCC. Immune blotting demonstrated that IL-23 was highly expressed in HCC cell lines with metastasis. Functional study found that IL-23 could promote HCC cell migration and invasion. Molecular analysis revealed that IL-23 could upregulate MMP9 expression via NF-kappaB/p65 signaling activation and IL-17A could improve IL-23 expression in tumor cells directly via activating NF-kappaB/p65 signaling pathway. CONCLUSIONS: IL-23 could promote HCC metastasis by the upregulation of MMP9 expression via activating NF-kappaB/p65 signaling pathway. At the same time, IL-17A could further promote IL-23 expression in HCC tumor cells.