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Open Access Research article

Zinc finger protein ZBTB20 expression is increased in hepatocellular carcinoma and associated with poor prognosis

Qing Wang1, Ye-xiong Tan1, Yi-bin Ren1, Li-wei Dong1, Zhi-fang Xie2, Liang Tang1, Dan Cao1, Wei-ping Zhang2, He-ping Hu3 and Hong-yang Wang2*

Author Affiliations

1 International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Institute, the Second Military Medical University, 225 Changhai Road, Shanghai, 200433, PR China

2 Department of Pathophysiology, Basic Medicine Institute, Second Military Medical University,800 Xiangyin Road, Shanghai, 200433, PR China

3 Department of Comprehensive Treatment II, Eastern Hepatobiliary Surgery Institute, the Second Military Medical University, 225 Changhai Road, Shanghai, 200433, PR China

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BMC Cancer 2011, 11:271  doi:10.1186/1471-2407-11-271

Published: 25 June 2011

Abstract

Background

Our previous studies showed that ZBTB20, a new BTB/POZ-domain gene, could negatively regulate α feto-protein and other liver-specific genes, concerning such as bio-transformation, glucose metabolism and the regulation of the somatotropic hormonal axis. The aim of this study is to determine the potential clinical implications of ZBTB20 in hepatocellular carcinoma (HCC).

Methods

Quantitative real-time RT-PCR and Western blot analyses were used to detect expression levels of ZBTB20 in 50 paired HCC tumorous and nontumorous tissues and in 20 normal liver tissues. Moreover, expression of ZBTB20 was assessed by immunohistochemistry of paired tumor and peritumoral liver tissue from 102 patients who had undergone hepatectomy for histologically proven HCC. And its relationship with clinicopathological parameters and prognosis was investigated.

Results

Both messenger RNA and protein expression levels of ZBTB20 were elevated significantly in HCC tissues compared with the paired non-tumor tissues and normal liver tissues. Overexpressed ZBTB20 protein in HCC was significantly associated with vein invasion (P = 0.016). Importantly, the recurrence or metastasis rates of HCCs with higher ZBTB20 expression were markedly greater than those of HCCs with lower expression (P = 0.003, P = 0.00015, respectively). Univariate and multivariate analyses revealed that ZBTB20 overexpression was an independent prognostic factor for HCC. The disease-free survival period and over-all survival period in patients with overexpressed ZBTB20 in HCC was significantly reduced.

Conclusions

The expression of ZBTB20 is increased in HCC and associated with poor prognosis in patients with HCC, implicating ZBTB20 as a candidate prognostic marker in HCC.