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RASSF1A and SOCS1 genes methylation status as a noninvasive marker for hepatocellular carcinoma.

BACKGROUND
DNA methylation status is one of the most prevalent molecular alterations in human cancers. Identification of powerful diagnostic and prognostic biomarkers for hepatocellular carcinoma (HCC) without a biopsy is urgently required.


OBJECTIVE
The purpose of this study was to determine the methylation status of RASSF1A and SOCS-1genes as a non-invasive biomarker for HCC identification and prognosis.


METHODS
Methylation specific-PCR technique was performed to recognize the methylation status of RASSF1A and SOCS-1 genes in 100 patients with HCC, 100 patients with liver cirrhosis (LC) but without HCC were considered as cirrhotic liver control group and 100 healthy control.


RESULTS
Methylation of RASSF1A and SOCS-1 genes were detected in 40% and 38% of HCC patients respectively, 14% and 20% of LC patients respectively. Methylation of SOCS-1 gene in peripheral blood of healthy control was 23%. Methylation of RASSF1A gene was associated with age, tumor size, vascular invasion and α fetoprotein (AFP), while SOCS-1 gene methylation was significantly associated with tumor size and AFP. Furthermore, using RASSF1A/ SOCS-1/ AFP panel improve diagnostic sensitivity for HCC 86% and specificity of 75%.


CONCLUSION
RASSF1A and SOCS1 genes methylation status may play an important role in the process of hepatocarcinogenesis and may be used as diagnostic and prognostic noninvasive biomarkers for HCC when combined with serum AFP.