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© Jacob SEELER & Anne DEJEAN, Institut Pasteur
Immunostaining of PML nuclear bodies involved in acute promyelocytic leukemia
Publication : Oncogene

Comprehensive allelotyping of human hepatocellular carcinoma

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Oncogene - 19 Jun 1997

Nagai H, Pineau P, Tiollais P, Buendia MA, Dejean A

Link to Pubmed [PMID] – 9205099

Oncogene 1997 Jun;14(24):2927-33

Hepatocellular carcinoma (HCC) is one of the most common cancers in many parts of the world, however the molecular mechanisms underlying liver cell transformation remain obscure. A genome-wide scan of loss of heterozygosity (LOH) in tumors provides a powerful tool to search for genes involved in neoplastic processes. To identify recurrent genetic alterations in liver tumors, we examined DNAs isolated from 120 HCCs and their adjacent non tumorous parts for LOH using a collection of 195 microsatellite markers located roughly every 20 cM throughout 39 autosomal arms. The mean heterozygosity was 73%. Our findings provide additional support that LOH for loci on chromosomal arms 1p, 4q, 6q, 8p, 13q and 16p is significantly elevated in HCC. The highest percentage of LOH is found for a locus in 8p23 (42% of informative csaes). This corresponds to one of the most common genetic abnormalities reported to date in these tumors. In addition, high ratio of LOH (> or = 35%) is observed on chromosome arms which had not been implicated in previous studies, notably on 1q, 2q and 9q. No correlation was found between LOH of specific chromosomal regions and etiologic factors such as chronic infections with hepatitis B or C viruses. This first report of an extensive allelotypic analysis of HCC should help in identifying new genes whose loss of function contributes to the development of liver cancer.

https://www.ncbi.nlm.nih.gov/pubmed/9205099