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KMID : 0985420100320020255
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Laboratory Medicine and Quality Assurance
2010 Volume.32 No. 2 p.255 ~ p.262
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Arg72Pro Polymorphism and Exon 7 Codon 249 Mutation of Plasma DNA p53 Gene in Early Hepatocellular Carcinoma Patients with Hepatitis B Virus Infection in a Korean population
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Park Yong-Jung
Lee Jong-Han
Lee Eun-Young
Kim Hyon-Suk
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Abstract
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Background: This study was performed to investigate on the genotypic frequencies of p53 Arg72Pro polymorphism and the prevalence of p53 codon 249 mutation in hepatocellular carcinoma patients.
Methods: Plasma DNAs were extracted from the samples of 44 early HCC cases, 24 chronic B-viral hepatitis patients and 27 healthy individuals. Serum levels of AFP, PIVKA-II, and HBV DNA-positive rates among the study groups were also compared. PCR-based restriction fragment length polymorphism method was used to determine p53 Arg72Pro genotype and to detect codon 249 mutation.
Results: Serum AFP and PIVKA-II level, Edmondson grade, tumor size and frequency of HBV DNA-positivity among HCC group according to Arg72Pro genotypes showed no statistically significant difference. The frequencies of Arg72Pro genotypes (Arg/Arg, Arg/Pro, Pro/Pro) were respectively as follows: 34.1%, 47.7%, 18.2% in HCC group; 29.2%, 54.2%, 16.7% in hepatitis group; 29.6%, 55.6%, 14.8% in control group. Pro homozygote genotype had a higher risk for developing HCC by adjusted OR (1.529, 95% CI 0.325-7.193), but not statistically significant (P=0.591). No codon 249 mutation was found among 44 HCC cases.
Conclusions: Pro homozygote was around 16% in all study groups, and did not statistically increase risks to developing HCC. We suggest that Arg72Pro polymorphism of p53 gene is not a significant risk factor in early hepatocarcinogenesis.
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KEYWORD
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Hepatocellular carcinoma, p53, Hepatitis B virus, Polymorphism
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