alexa RASSF1A promoter hypermethylation as a prognostic marker for hepatocellular carcinoma.


Clinical & Medical Biochemistry

Author(s): Saelee P, Wongkham S, Chariyalertsak S, Petmitr S, Chuensumran U

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Abstract This study was performed to determine whether epigenetic aberrant methylation of RASSF1A might be associated with hepatocarcinogenesis. Methylation specific-PCR was performed to identify RASSF1A promoter hypermethylation in 29 tumors and corresponding normal liver tissues. In addition, RASSF1A mRNA levels were analyzed by quantitative real-time reverse transcription-PCR. Aberrant methylation of RASSF1A was detected in 25 of 29 cases (86\%), with loss of RASSF1A expression evident in 8 of 22 cases (36\%). No correlation between loss of RASSF1A mRNA and promoter hypermethylation of the RASSF1A gene was observed. There was a significant correlation between the methylation status of RASSF1A and hepatocellular carcinoma (HCC) patients who did not undergo chemotherapy (P = 0.03). Multivariate analysis, adjusted for tumor size, treatment, RASSF1A hypermethylation, and RASSF1A under-expression, showed RASSF1A hypermethylation to be assocaited with a better prognosis for HCC patients (HR= 0.089, 95\%CI = 0.013-0.578; P = 0.012). Our findings showed that RASSF1A promoter hypermethylation occurs frequently, and may serve as a good prognostic factor.
This article was published in Asian Pac J Cancer Prev and referenced in Clinical & Medical Biochemistry

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