Abstract:
:Hepatocellular carcinoma (HCC) is one of the most common cancer types worldwide. The signal transducer and activator of transcription 3 (STAT3) protein is a member of the STAT transcription factor family. Oncogenesis, invasion, and metastasis of HCC are associated with activation of STAT3. However, whether aberrant expression of phosphorylated STAT3 (p-STAT3) in peripheral CD4+ and CD8+ T cells relates to HCC pathogenesis remains unclear. In this study, the expression of p-STAT3 in CD4+ and CD8+ T cells, and the levels of interferon-γ (IFN-γ), interleukin-4 (IL-4), IL-6 and IL-10 in the human hepatoma cell line Huh7 co-cultured with peripheral blood mononucleated cells (PBMCs) of healthy volunteers were measured. The correlations between p-STAT3 and IFN-γ/IL-4, IFN-γ, IL-4, IL-6 and IL-10 were then analyzed. Results showed that the p-STAT3 level is higher in CD4+ and CD8+ T cells in the peripheral blood of HCC patients, and in PBMCs co-cultured with Huh7 cells compared to controls. The cytokine (IL-4, IL-6 and IL-10) levels were increased and the IFN-γ level was decreased in the serum of HCC patients and in supernatants of PBMCs co-cultured with Huh7 cells. Correlation analyses demonstrated that the IFN-γ/IL-4 ratio and the IFN-γ level negatively correlate to the p-STAT3 level in CD4+ and CD8+ T cells in samples from patients and in cells cultured in vitro. By contrast, the levels of IL-4, IL-6 and IL-10 positively correlated to the p-STAT3 level. This study indicated that the expression of p-STAT3 is upregulated in peripheral CD4+ and CD8+ T cells of HCC patients, and which may result in abnormal immune surveillance and thereby, contribute to HCC pathogenesis.
journal_name
Mol Med Repjournal_title
Molecular medicine reportsauthors
Wang X,Xin W,Zhang H,Zhang F,Gao M,Yuan L,Xu X,Hu X,Zhao Mdoi
10.3892/mmr.2014.2510subject
Has Abstractpub_date
2014-11-01 00:00:00pages
2649-56issue
5eissn
1791-2997issn
1791-3004journal_volume
10pub_type
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