首页|Aberrant methylation of SPARC in human hepatocellular carcinoma and its clinical implication

Aberrant methylation of SPARC in human hepatocellular carcinoma and its clinical implication

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  • NETL
  • NSTL
  • 万方数据
  • 维普
AIM:To investigate the methylation status of secreted protein acidic and rich in cysteine (SPARC) in human hepatocellular carcinoma (HCC) and evaluate its clinical implication.METHODS:The methylation status of SPARC was analyzed in one HCC cell line (SMMC-7721) and 60 pairs of HCC and corresponding nontumorous tissues by methylation-specific polymerase chain reaction and bisulfite sequencing.The expression of SPARC mRNA and protein were examined by reverse transcription polymerase chain reaction and immunohistochemistry,respectively.The correlations between the methylation status and the gene expression,the clinicopathological parameters,as well as the prognosis after surgery were analyzed.RESULTS:In the SMMC-7721 cell line,the loss of SPARC expression was correlated with the aberrant methylation and could be reactivated by the demethylating agent 5-aza-2'-deoxycytidine.Methylation frequency of SPARC in HCC was significantly higher than that in the corresponding nontumorous tissues (45/60vs 7/60,P ＜ 0.001),and it was correlated with the pathological classification (P =0.019).The downregulation of the SPARC mRNA expression in HCC was correlated with the SPARC methylation (P =0.040).The patients with methylated SPARC had a poorer overall survival than those without methylated SPARC (28.0mo vs 41.0 mo,P =0.043).CONCLUSION:Aberrant methylation is an important mechanism for SPARC inactivation in HCC and SPARC methylation may be a promising biomarker for the diagnosis and prognosis of HCC.

BiomarkerDiagnosisHepatocellular carcinomaMethylationPrognosisTumor suppressor gene

Ye Zhang、Bin Yang、Zhi Du、Tong Bai、Ying-Tang Gao、Yi-Jun Wang、Cheng Lou、Feng-Mei Wang、Yu Bai

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Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China

The Third Central Hospital of Tianjin, Tianjin 300170, China

Tianjin Key Laboratory of Artificial Cell, Tianjin 300170, China

Tianjin Health Bureau for research projectsTianjin Health Bureau for research projectsTianjin Health Bureau for research projects

09KY042010KZ1711KG112

2012

10.3748/wjg.v18.i17.2043

世界胃肠病学杂志(英文版)
太原消化病研治中心

世界胃肠病学杂志(英文版)

SCI
影响因子：1.001
ISSN：1007-9327
年,卷(期)：2012.18(17)
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