PMID: 7540433Mar 1, 1995Paper

Loss of heterozygosity and analysis of mutation of p53 in hepatocellular carcinoma

Journal of Gastroenterology and Hepatology
Y YumotoT Tsuji

Abstract

Thirty-six hepatocellular carcinoma (HCC) tissues obtained from 34 patients were classified according to histological diagnosis into six well-differentiated HCC, 20 moderately differentiated HCC and 10 poorly differentiated HCC. High molecular weight DNA was prepared from each tumour and the corresponding non-tumour tissue. Loss of heterozygosity (LOH) on chromosomes 4q, 5q, 10q, 11p, 16q, 17p, mutation of the p53 gene and polymorphism of intron 25 of the retinoblastoma (RB) gene were simultaneously analysed. The patients were composed of three cases of small HCC (the diameter of which was < 3 cm) and 31 cases of advanced HCC. Twenty-nine of 34 (85.3%) patients analysed had been exposed to hepatitis B virus and/or hepatitis C virus. The frequencies of LOH on seven chromosomes were 57.9% in 17p13.3, 45.1% in 17p, 45.1% in 11p, 41.9% in 5q, 41.9% in 16q24, 29.0% in 4q, 25.8% in 10q in advanced HCC (four of well differentiated, 18 of moderately differentiated and nine of poorly differentiated carcinoma). In contrast, LOH was observed on 4q, 5q, 16q and 17p in 33% (1/3) of the small HCC (two of well differentiated and one of moderately differentiated carcinoma). The mutation of the p53 genes and polymorphism of the RB gene were pre...Continue Reading

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