Epstein barr virus DNA in hepatocelullar carcinoma tissues from hepatitis C positive Egyptian patients

ABSTRACT

Hepatocellular carcinoma [HCC] is one of the most frequent malignant tumors. It possesses the characteristics of high malignancy, rapid progress and poor prognosis. In recent years, studies have suggested that Epstein-Barr virus [EBV] is associated with HCC although opposite results have been subsequently reported. The present study was to determine the prevalence of EBV in HCC Egyptian patients, and whether EBV acts synergistically with hepatitis viruses in HCC carcinogenesis. The study included 61 patients, 20 HCV positive patients without HCC [16 males and 4 females] and 41 patients with proved HCC. They were subclassified into 3 groups [21 HCV positive [18 males and 3 female], 10 HBV positive [8 males and 2 females] and 10 HCC patients negative for both HCV and HBV [7 males and 3 females]]. Thorough clinical examination, abdominal ultrasonography and liver spiral CT were done. Liver function tests and serum alpha-fetoprotein [AFP], viral hepatitis markers for B and C, anti-EBV early antigen [EA-IgM], virus capsular antigen [VCA-IgMl and HCV RNA by reverse transcription PCR [RT-PCR] were measured. EBV-BamHI W DNA, and EBV-LMP1 DNA were performed by conventional PCR in the tumorus liver tissue of 41 HCC patients and the 20 noncarcinoma patients [HCV without HCC]. The positive ratios were compared between HCC subgroups and non tumorus HCV group. Our results revealed that, EBV-BamHI W DNA and/or EBV-LMP1 DNA were positive in 25 [40.9%] among overall 61 studied cases. In HCC patients, EBV-BamHI W DNA and/or EBV-LMP1 DNA were positive in 13 [61.9%] out of 21 HCV positive, 2 [20%] out of 10 HBV positive cases, 3 [30%] out of 10 cases negative for both HCV and HBV. However, it was positive in 7 [3 5%] out of 20 HCV cases without HCC [non tumotus cases]. The rate of EBV infection in HCC with HCV positive cases was significantly higher [Fisher exact=4.6 1; p<0.05] than HCC with HBV positive ones, HCC cases negative for both B and C virus [Fisher exact-4.28; p<0.05] and chronic HCV [non tumours] cases [Fisher exact=4. 19; p<0.05]. In addition, HCC in EBV DNA positive cases was associated with high HCV viral load, AST, ALT, low serum albumin, while there was no relation to AFP serum levels. In conclusion: the existence of EBV infection in HCC tissues suggests that EBV may be involved in the hepatocellular carcinogenesis in Egypt